U.S. patent application number 11/894078 was filed with the patent office on 2008-02-14 for striped liquid personal cleansing compositions containing a cleansing phase and a separate benefit phase with improved stability.
Invention is credited to Heather Lynn Focht, Christopher Dean Putman, Cheyne Pohlman Thomas, Karl Shiqing Wei.
Application Number | 20080039353 11/894078 |
Document ID | / |
Family ID | 32469261 |
Filed Date | 2008-02-14 |
United States Patent
Application |
20080039353 |
Kind Code |
A1 |
Focht; Heather Lynn ; et
al. |
February 14, 2008 |
Striped liquid personal cleansing compositions containing a
cleansing phase and a separate benefit phase with improved
stability
Abstract
Personal cleansing compositions comprise a cleansing phase
comprising a surfactant and water; and a separate, substantially
anhydrous benefit phase comprising a hydrophobic skin benefit
agent. The cleansing phase and the benefit phase have substantially
the same density; wherein the personal cleansing composition is in
a form selected from the group consisting of liquid, semi-liquid,
cream, lotion, gel, and mixtures thereof. The two phases are
packaged in physical contact. These compositions and corresponding
methods provide improved cosmetics, skin feel, and/or skin benefit
efficacy.
Inventors: |
Focht; Heather Lynn;
(Hamilton, OH) ; Putman; Christopher Dean; (West
Chester, OH) ; Thomas; Cheyne Pohlman; (Independence,
KY) ; Wei; Karl Shiqing; (Mason, OH) |
Correspondence
Address: |
THE PROCTER & GAMBLE COMPANY;INTELLECTUAL PROPERTY DIVISION - WEST BLDG.
WINTON HILL BUSINESS CENTER - BOX 412
6250 CENTER HILL AVENUE
CINCINNATI
OH
45224
US
|
Family ID: |
32469261 |
Appl. No.: |
11/894078 |
Filed: |
August 20, 2007 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10699469 |
Oct 31, 2003 |
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11894078 |
Aug 20, 2007 |
|
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60423537 |
Nov 4, 2002 |
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Current U.S.
Class: |
510/158 ;
510/159 |
Current CPC
Class: |
A61K 8/0237 20130101;
A61K 8/0204 20130101; A61K 8/03 20130101; A61K 2800/412 20130101;
A61K 8/0279 20130101; A61Q 19/10 20130101; A61K 8/02 20130101 |
Class at
Publication: |
510/158 ;
510/159 |
International
Class: |
C11D 17/00 20060101
C11D017/00; C11D 17/08 20060101 C11D017/08 |
Claims
1. A personal cleansing article comprising a package containing a
striped personal cleansing composition comprising: (a) a first
stripe comprising a cleansing phase comprising a surfactant and
water; and (b) at least one additional stripe comprising a benefit
phase comprising at least about 20%, by weight of said benefit
phase, of a hydrophobic skin benefit agent having a Vaughn
Solubility Parameter of from about 5 to about 15
(cal/cm.sup.3).sup.0.5; wherein the cleansing phase and the benefit
phase have substantially the same density; wherein said striped
personal care composition is in a form selected from the group
consisting of liquid, semi-liquid, cream, lotion, gel, and mixtures
thereof; and wherein said cleansing phase and said benefit phase
are in physical contact within said package while remaining stable
at one atmosphere of pressure, 50% relative humidity, and
25.degree. C. for 180 days.
2. A personal cleansing article comprising a package containing a
striped personal cleansing composition comprising: a) a first
stripe comprising a cleansing phase comprising from about 1% to
about 50%, by weight of the cleansing phase, of a surfactant
selected from the group consisting of anionic surfactant, non-ionic
surfactant, zwitterionic surfactant, cationic surfactant, soap, and
mixtures thereof; wherein the cleansing phase is non-Newtonian
shear thinning, has a viscosity of equal to or greater than about
3,000 centipoise and a yield point of at least about 0.1 Pascal;
and b) at least one additional stripe comprising a separate benefit
phase comprising from about 20% to about 100%, by weight of the
benefit phase, of a hydrophobic skin benefit agent selected from
the group consisting of hydrocarbons, oils, waxes, silicones, fatty
acid derivatives, cholesterol, cholesterol derivatives,
diglycerides, triglycerides, vegetable oils, vegetable oil
derivatives, acetoglyceride esters, alkyl esters, alkenyl esters,
lanolin, lanolin derivatives, wax esters, beeswax derivatives,
sterols, phospholipids, and mixtures thereof; wherein the
hydrophobic benefit agent has a Vaughan Solubility Parameter of
from about 5 to about 15 (cal/cm.sup.3).sup.0.5; wherein the
cleansing phase and the benefit phase have substantially the same
density; wherein the ratio between the cleansing phase and the
benefit phase is from about 1:9 to about 99:1; wherein the
cleansing phase and benefit phase are packaged in physical contact
within said package while remaining stable at one atmosphere of
pressure, 50% relative humidity, and 25.degree. C. for 180 days;
and wherein the cleansing phase and benefit phase are present as
stripes wherein the stripe size is at least about 0.1 mm in width
and at least about 1 mm in length; and wherein said striped
personal cleansing composition is in a form selected from the group
consisting of liquid, semi-liquid, cream, lotion, gel, and mixtures
thereof.
3. A personal cleansing article according to claim 1, wherein the
benefit phase has a Consistency value of from about 1 poise to
about 10,000 poise.
4. A personal cleansing article according to claim 1, wherein the
benefit phase has a Shear Index of from about 0.1 to about 0.8.
5. A personal cleansing article according to claim 1, wherein the
hydrophobic skin benefit agent represents at least about 50% by
weight of the benefit phase.
6. A personal cleansing article according to claim 1, wherein said
hydrophobic skin benefit agent is selected from the group
consisting of petrolatum, mineral oil, micro-crystalline waxes,
paraffins, ozokerite, polyethylene, polybutene, polydecene,
perhydrosqualene, dimethicones, cyclomethicones, alkyl siloxanes,
polymethylsiloxanes, methylphenylpolysiloxanes, lanolin, lanolin
oil, lanolin wax, lanolin alcohols, lanolin fatty acids, isopropyl
lanolate, acetylated lanolin, acetylated lanolin alcohols, lanolin
alcohol linoleate, lanolin alcohol riconoleate, castor oil, soy
bean oil, sunflower seed oil, maleated soy bean oil, safflower oil,
cotton seed oil, corn oil, walnut oil, peanut oil, olive oil, cod
liver oil, almond oil, avocado oil, palm oil, sesame oil, and
combinations thereof.
7. A personal cleansing article according to claim 1, wherein said
personal cleansing composition further comprises a structurant.
8. A personal cleansing article according to claim 7 wherein the
structurant is selected from the group consisting of
trihydroxystearin, silicas, clays, and polymers.
9. A personal cleansing article according to claim 1, wherein said
personal cleansing composition further comprises a cationic
deposition polymer.
10. A personal cleansing article according to claim 1, wherein the
cleansing and benefit phases form a pattern within said
package.
11. A personal cleansing article composition according to claim 1,
wherein said package is transparent.
12. A personal cleansing article according to claim 2, wherein the
benefit phase has a Consistency value of from about 1 poise to
about 10,000 poise.
13. A personal cleansing article according to claim 2, wherein the
benefit phase has a Shear Index of from about 0.1 to about 0.8.
14. A personal cleansing article according to claim 2, wherein the
hydrophobic skin benefit agent represents at least about 50% by
weight of the benefit phase.
15. A personal cleansing article according to claim 2, wherein said
hydrophobic skin benefit agent is selected from the group
consisting of petrolatum, mineral oil, micro-crystalline waxes,
paraffins, ozokerite, polyethylene, polybutene, polydecene,
perhydrosqualene, dimethicones, cyclomethicones, alkyl siloxanes,
polymethylsiloxanes, methylphenylpolysiloxanes, lanolin, lanolin
oil, lanolin wax, lanolin alcohols, lanolin fatty acids, isopropyl
lanolate, acetylated lanolin, acetylated lanolin alcohols, lanolin
alcohol linoleate, lanolin alcohol riconoleate castor oil, soy bean
oil, sunflower seed oil, maleated soy bean oil, safflower oil,
cotton seed oil, corn oil, walnut oil, peanut oil, olive oil, cod
liver oil, almond oil, avocado oil, palm oil, sesame oil, and
combinations thereof.
16. A personal cleansing article according to claim 2, wherein said
personal cleansing composition further comprises a structurant.
17. A personal cleansing article according to claim 16, wherein the
structurant is selected from the group consisting of
trihydroxystearin, silicas, clays, and polymers.
18. A personal cleansing article according to claim 2, wherein said
personal cleansing composition further comprises a cationic
deposition polymer.
19. A personal cleansing article according to claim 2, wherein the
cleansing and benefit phases form a pattern within the package.
20. A personal cleansing article according to claim 2, wherein said
package is transparent.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation of U.S. patent
application Ser. No. 10/699,469 filed on Oct. 31, 2003 which claims
the benefit of U.S. Provisional Application No. 60/423,537, filed
Nov. 4, 2002.
FIELD OF THE INVENTION
[0002] The present invention relates to striped liquid personal
cleansing compositions comprising a cleansing phase and a separate
benefit phase wherein the two phases are packaged in physical
contact with improved stability.
BACKGROUND OF THE INVENTION
[0003] Personal cleansing compositions that attempt to provide
skin-conditioning benefits are known. Many of these compositions
are aqueous systems comprising an emulsified conditioning oil or
other similar materials in combination with a lathering surfactant.
Although these products provide both conditioning and cleansing
benefits, it is often difficult to formulate a product that
deposits sufficient amount of skin conditioning agents on skin
during use. In order to combat emulsification of the skin
conditioning agents by the cleansing surfactant, large amounts of
the skin conditioning agent are added to the compositions. However,
this introduces another problem associated with these dual
cleansing and conditioning products. Raising the level of skin
conditioning agent in order to achieve increased deposition
negatively affects product lather performance and stability.
[0004] One attempt at providing conditioning and cleansing benefits
from a personal cleansing product while maintaining stability has
been the use of dual-chamber packaging. These packages comprise
separate cleansing compositions and conditioning compositions, and
allow for the co-dispensing of the two in a single or dual stream.
The separate conditioning and cleansing compositions thus remain
physically separate and stable during prolonged storage and just
prior to application, but then mix during or after dispensing to
provide conditioning and cleansing benefits from a physically
stable system. Although such dual-chamber delivery systems provide
improved conditioning benefits over the use of conventional
systems, it is often difficult to achieve consistent and uniform
performance because of the uneven dispensing ratio between the
cleansing phase and the conditioning phase from these dual-chamber
packages. Additionally, these packaging systems add considerable
cost to the finished product.
[0005] Accordingly, the need still remains for a personal cleansing
composition that provides both cleansing and improved skin
conditioning benefits. The need also remains for a personal
cleansing composition comprising two phases in physical contact
that remain stable for long periods of time.
[0006] It is therefore an object of the present invention to
provide a striped liquid personal cleansing composition comprising
cleansing and benefit phases that are packaged in physical contact
while remaining stable, wherein the compositions provide improved
deposition of conditioning agents on skin.
[0007] It has now been found that a striped liquid personal
cleansing composition containing both cleansing and benefit phases
that are packaged in physical contact while remaining stable, can
be formulated to provide improved cosmetics and skin feel during
and after application while also providing excellent skin
conditioning and cleansing benefits. It has been found that such a
composition can be formulated with sufficiently high levels of
benefit agents without compromising product lather performance and
stability. Superior lather performance can be demonstrated via the
lather volume method described herein.
[0008] It has also been found that striped personal cleansing
compositions can be formulated with enhanced stability by density
matching of the cleansing phase and the benefit phase and by
incorporating density modifiers in the cleansing phase and/or the
benefit phase.
SUMMARY OF THE INVENTION
[0009] The present invention is directed to a striped personal
cleansing composition comprising first stripe comprising a
cleansing phase comprising a surfactant, water, and optional
conventional personal cleansing ingredients and at least one
additional stripe comprising a separate benefit phase containing at
least about 20% by weight of a hydrophobic material having a Vaughn
Solubility Parameter of from about 5 to about 15, wherein the
benefit phase has a Consistency Value of from about 1 to about
10,000 poise.
[0010] The present invention further relates to a striped liquid
personal cleansing composition comprising: [0011] a) a first stripe
comprising a cleansing phase comprising from about 1% to about 50%
by weight of the cleansing phase of a surfactant selected from the
group consisting of anionic surfactant, non-ionic surfactant,
zwitterionic surfactant, cationic surfactant, soap and mixtures
thereof; [0012] wherein the cleansing phase is non-Newtonian shear
thinning, and has a viscosity of equal to or greater than about
3,000 cps and a yield value of at least about 0.1 Pa; and [0013] b)
a benefit phase comprising from about 20% to about 100% by weight
of the benefit phase of a hydrophobic material selected from the
group consisting of lipids, hydrocarbons, fats, oils, hydrophobic
plant extracts, fatty acids, essential oils, silicone oils, and
mixtures thereof; [0014] wherein the hydrophobic material has a
Vaughan Solubility Parameter of about 5 to about 15 and further
wherein the weight ratio between the cleansing phase and the
benefit phase is from about 1:9 to about 99:1 and the cleansing
phase and benefit phase are in physical contact in the same package
and remain stable in ambient conditions for at least about 180
days; and wherein the cleansing phase and benefit phase are present
as stripes wherein the stripe size is at least about 0.1 mm in
width and at least about 1 mm in length; [0015] wherein the
cleansing phase and/or the benefit phase contains a density
modifier to match the cleansing phase density to the benefit phase
density.
[0016] The present invention further relates to a striped personal
cleansing composition comprising a cleansing phase and benefit
phase wherein at least one phase contains a colorant, wherein both
phases are packed in a single package such that the two phases form
a pattern.
[0017] The present invention is also directed to a method of
cleansing and moisturizing the skin by applying to the skin a
composition as described above. These compositions provide improved
deposition of skin benefit agents on skin during application.
DETAILED DESCRIPTION
[0018] The striped personal cleansing compositions and methods of
the present invention comprise personal cleansing compositions
comprising a first stripe comprising a cleansing phase and at least
one additional stripe comprising a separate benefit phase. These
and other essential limitations of the compositions and methods of
the present invention, as well as many of the optional ingredients
suitable for use herein, are described in detail hereinafter.
[0019] The term "anhydrous" as used herein, unless otherwise
specified, refers to those compositions or materials containing
less than about 10%, more preferably less than about 5%, even more
preferably less than about 3%, even more preferably zero percent,
by weight of water.
[0020] The term "ambient conditions" as used herein, unless
otherwise specified, refers to surrounding conditions at one (1)
atmosphere of pressure, 50% relative humidity, and 25.degree.
C.
[0021] The term "stable" as used herein, unless otherwise
specified, refers to compositions that maintain at least two
"separate" phases in physical contact at ambient conditions for a
period of at least about 180 days. By "separate" is meant that
there is substantially no mixing, observable to the naked eye,
prior to dispensing of the composition.
[0022] The term "personal cleansing composition" as used herein,
unless otherwise specified, refers to the compositions of the
present invention, wherein the compositions are intended to include
only those compositions for topical application to the skin or
hair, and specifically excludes those compositions that are
directed primarily to other applications such as hard surface
cleansing, fabric or laundry cleansing, and similar other
applications not intended primarily for topical application to the
hair or skin.
[0023] The Vaughan Solubility Parameter (VSP) as used herein is a
parameter used to define the solubility of lipophilic materials.
Vaughan Solubility parameters are well known in the various
chemical and formulation arts and typically have a range of from 5
to 25.
[0024] The term "Consistency" or "k" as used herein is a measure of
lipid viscosity and is used in combination with Shear index, to
define viscosity for materials whose viscosity is a function of
shear. The measurements are made at 35.degree. C. and the units are
poise (equal to 100 cps).
[0025] The term "Shear index" or "n" as used herein is a measure of
lipid viscosity and is used in combination with Consistency, to
define viscosity for materials whose viscosity is a function of
shear. The measurements are made at 35.degree. C. and the units are
dimensionless.
[0026] The phrase "substantially free of" as used herein, unless
otherwise specified means that the composition comprises less than
about 5%, preferably less than about 3%, more preferably less than
about 1% and most preferably less than about 0.1% of the stated
ingredient.
[0027] The term "a striped" personal cleansing composition as used
herein, is one that comprises separate phases that form a pattern
that is selected from the group consisting of striped, geometric,
marbled and mixtures thereof. Preferably, the stripe size is at
least about 0.1 mm in width and at least 1 mm in length. More
preferably, the stripe size is at least about 0.5 mm in width and
at least 10 mm in length. Even more preferably, the stripe size is
at least about 1 mm in width and at least 20 mm in length.
[0028] All percentages, parts and ratios as used herein are by
weight of the total composition, unless otherwise specified. All
such weights as they pertain to listed ingredients are based on the
active level and, therefore, do not include solvents or by-products
that may be included in commercially available materials, unless
otherwise specified.
[0029] The personal cleansing compositions and methods of the
present invention can comprise, consist of, or consist essentially
of, the essential elements and limitations of the invention
described herein, as well as any additional or optional
ingredients, components, or limitations described herein or
otherwise useful in personal cleansing compositions intended for
topical application to the hair or skin.
Product Form
[0030] The personal cleansing compositions of the present invention
can be in the form of liquid, semi-liquid, cream, lotion or gel
compositions intended for topical application to skin. These
compositions contain a cleansing phase and a benefit phase, both of
which are described in greater detail hereinafter.
[0031] All of the product forms contemplated for purposes of
defining the compositions and methods of the present invention are
rinse-off formulations, by which is meant the product is applied
topically to the skin or hair and then subsequently (i.e., within
minutes) rinsed away with water, or otherwise wiped off using a
substrate or other suitable removal means.
[0032] The personal cleansing composition of the present invention
preferably has a density in the cleaning phase and a density in the
benefit phase that match. Preferably the density matched is about
less than 0.15 g/cm.sup.3, more preferably less than about 0.1
g/cm.sup.3, even more preferably less than 0.05 g/cm.sup.3, still
even more preferably less than 0.01 g/cm.sup.3.
Cleansing Phase
[0033] The personal cleansing compositions of the present invention
comprise an aqueous cleansing phase that contains a surfactant
suitable for application to the skin or hair. Suitable surfactants
for use herein include any known or otherwise effective cleansing
surfactant suitable for application to the skin, and which is
otherwise compatible with the other essential ingredients in the
aqueous cleansing phase of the compositions. These cleansing
surfactants include anionic, nonionic, cationic, zwitterionic or
amphoteric surfactants, or combinations thereof.
[0034] The aqueous cleansing phase of the personal care
compositions preferably comprises a cleansing surfactant at
concentrations ranging from about 1% to about 50%, more preferably
from about 4% to about 30%, even more preferably from about 5% to
about 25%, by weight of the aqueous cleansing phase. The preferred
pH range of the cleansing phase is from about 5 to about 8.
[0035] Anionic surfactants suitable for use in the cleansing phase
include alkyl and alkyl ether sulfates. These materials have the
respective formula ROSO.sub.3M and
RO(C.sub.2H.sub.4O).sub.xSO.sub.3M, wherein R is alkyl or alkenyl
of from about 8 to about 24 carbon atoms, x is 1 to 10, and M is a
water-soluble cation such as ammonium, sodium, potassium and
triethanolamine. The alkyl ether sulfates are typically made as
condensation products of ethylene oxide and monohydric alcohols
having from about 8 to about 24 carbon atoms. Preferably, R has
from about 10 to about 18 carbon atoms in both the alkyl and alkyl
ether sulfates. The alcohols can be derived from fats, e.g.,
coconut oil or tallow, or can be synthetic. Lauryl alcohol and
straight chain alcohols derived from coconut oil are preferred
herein. Such alcohols are reacted with about 1 to about 10,
preferably from about 3 to about 5, and more preferably with about
3, molar pro- portions of ethylene oxide and the resulting mixture
of molecular species having, for example, an average of 3 moles of
ethylene oxide per mole of alcohol, is sulfated and
neutralized.
[0036] Specific examples of alkyl ether sulfates which may be used
in the cleansing phase are sodium and ammonium salts of coconut
alkyl triethylene glycol ether sulfate; tallow alkyl triethylene
glycol ether sulfate, and tallow alkyl hexaoxyethylene sulfate.
Highly preferred alkyl ether sulfates are those comprising a
mixture of individual compounds, said mixture having an average
alkyl chain length of from about 10 to about 16 carbon atoms and an
average degree of ethoxylation of from about 1 to about 4 moles of
ethylene oxide.
[0037] Other suitable anionic surfactants include water-soluble
salts of the organic, sulfuric acid reaction products of the
general formula [R.sup.1--SO.sub.3--M], wherein R.sup.1 is chosen
from the group consisting of a straight or branched chain,
saturated aliphatic hydrocarbon radical having from about 8 to
about 24, preferably about 10 to about 18, carbon atoms; and M is a
cation. Suitable examples are the salts of an organic sulfuric acid
reaction product of a hydrocarbon of the methane series, including
iso-, neo-, ineso-, and n-paraffins, having about 8 to about 24
carbon atoms, preferably about 10 to about 18 carbon atoms and a
sulfonating agent, e.g., SO.sub.3, H.sub.2SO.sub.4, oleum, obtained
according to known sulfonation methods, including bleaching and
hydrolysis. Preferred are alkali metal and ammonium sulfonated
C.sub.10-18n-paraffins.
[0038] Other suitable surfactants are described in McCutcheon's,
Emulsifiers and Detergents, 1989 Annual, published by M. C.
Publishing Co., and in U.S. Pat. No. 3,929,678.
[0039] Preferred anionic surfactants for use in the cleansing phase
include ammonium lauryl sulfate, ammonium laureth sulfate,
triethylamine lauryl sulfate, triethylamine laureth sulfate,
triethanolamine lauryl sulfate, triethanolamine laureth sulfate,
monoethanolamine lauryl sulfate, monoethanolamine laureth sulfate,
diethanolamine lauryl sulfate, diethanolamine laureth sulfate,
lauric monoglyceride sodium sulfate, sodium lauryl sulfate, sodium
laureth sulfate, potassium laureth sulfate, sodium lauryl
sarcosinate, sodium lauroyl sarcosinate, lauryl sarcosine, cocoyl
sarcosine, ammonium cocoyl sulfate, ammonium lauroyl sulfate,
sodium cocoyl sulfate, sodium lauroyl sulfate, potassium cocoyl
sulfate, potassium lauryl sulfate, monoethanolamine cocoyl sulfate,
sodium tridecyl benzene sulfonate, sodium dodecyl benzene
sulfonate, and combinations thereof.
[0040] Anionic surfactants with branched alkyl chains such as
sodium trideceth sulfate, for example, are preferred in some
embodiments. Mixtures of anionic surfactants may be used in some
embodiments.
[0041] Additional surfactant from the classes of amphoteric,
zwitterionic surfactant, cationic surfactant, and/or nonionic
surfactant may be incorporated in the cleansing phase
compositions.
[0042] Amphoteric surfactants suitable for use in the cleansing
phase include those that are broadly described as derivatives of
aliphatic secondary and tertiary amines in which the aliphatic
radical can be straight or branched chain and wherein one of the
aliphatic substituents contains from about 8 to about 18 carbon
atoms and one contains an anionic water solubilizing group, e.g.,
carboxy, sulfonate, sulfate, phosphate, or phosphonate. Examples of
compounds falling within this definition are sodium
3-dodecyl-aminopropionate, sodium 3-dodecylaminopropane sulfonate,
sodium lauryl sarcosinate, N-alkyltaurines such as the one prepared
by reacting dodecylamine with sodium isethionate according to the
teaching of U.S. Pat. No. 2,658,072, N-higher alkyl aspartic acids
such as those produced according to the teaching of U.S. Pat. No.
2,438,091, and the products described in U.S. Pat. No.
2,528,378.
[0043] Zwitterionic surfactants suitable for use in the cleansing
phase include those that are broadly described as derivatives of
aliphatic quaternary ammonium, phosphonium, and sulfonium
compounds, in which the aliphatic radicals can be straight or
branched chain, and wherein one of the aliphatic substituents
contains from about 8 to about 18 carbon atoms and one contains an
anionic group, e.g., carboxy, sulfonate, sulfate, phosphate, or
phosphonate. Such suitable zwitterionic surfactants can be
represented by the formula: ##STR1## wherein R.sup.2 contains an
alkyl, alkenyl, or hydroxy alkyl radical of from about 8 to about
18 carbon atoms, from 0 to about 10 ethylene oxide moieties and
from 0 to about 1 glyceryl moiety; Y is selected from the group
consisting of nitrogen, phosphorus, and sulfur atoms; R.sup.3 is an
alkyl or monohydroxyalkyl group containing about 1 to about 3
carbon atoms; X is 1 when Y is a sulfur atom, and 2 when Y is a
nitrogen or phosphorus atom; R.sup.4 is an alkylene or
hydroxyalkylene of from about 1 to about 4 carbon atoms and Z is a
radical selected from the group consisting of carboxylate,
sulfonate, sulfate, phosphonate, and phosphate groups.
[0044] Other zwitterionic surfactants suitable for use in the
cleansing phase include betaines, including high alkyl betaines
such as coco dimethyl carboxymethyl betaine, cocoamidopropyl
betaine, cocobetaine, lauryl amidopropyl betaine, oleyl betaine,
lauryl dimethyl carboxymethyl betaine, lauryl dimethyl
alphacarboxyethyl betaine, cetyl dimethyl carboxymethyl betaine,
lauryl bis-(2-hydroxyethyl) carboxymethyl betaine, stearyl
bis-(2-hydroxypropyl) carboxymethyl betaine, oleyl dimethyl
gamma-carboxypropyl betaine, and lauryl
bis-(2-hydroxypropyl)alpha-carboxyethyl betaine. The sulfobetaines
may be represented by coco dimethyl sulfopropyl betaine, stearyl
dimethyl sulfopropyl betaine, lauryl dimethyl sulfoethyl betaine,
lauryl bis-(2-hydroxyethyl) sulfopropyl betaine and the like;
amidobetaines and amidosulfobetaines, wherein the
RCONH(CH.sub.2).sub.3 radical is attached to the nitrogen atom of
the betaine are also useful in this invention.
[0045] Amphoacetates and diamphoacetates may also be used.
Amphoacetate ##STR2## Diamphoacetate ##STR3## Amphoacetates and
diamphoacetates conform to the formulas (above) where R is an
aliphatic group of 8 to 18 carbon atoms. M is a cation such as
sodium, potassium, ammonium, or substituted ammonium. Sodium
lauroamphoacetate, sodium cocoamphoactetate, disodium
lauroamphoacetate, and disodium cocodiamphoacetate are preferred in
some embodiments.
[0046] Cationic surfactants can also be used in the cleansing
phase, but are generally less preferred, and preferably represent
less than about 5% by weight of the compositions.
[0047] Suitable nonionic surfactants for use in the aqueous
cleansing phase include condensation products of alkylene oxide
groups (hydrophilic in nature) with an organic hydrophobic
compound, which may be aliphatic or alkyl aromatic in nature.
Stability Enhancers
Density Modifiers
[0048] To further improve stability under stress conditions such as
high temperature and vibration, it is preferable to adjust the
densities of the separate phases such that they are substantially
equal. To achieve this, low density microspheres are added to the
cleansing phase of the striped composition. The low density
microspheres employed to reduce the overall density of the
cleansing phase are particles having a density lower than 0.7
g/cm.sup.3, preferably less than 0.2 g/cm.sup.3, more preferably
less than 0.1 g/cm.sup.3, most preferably less than 0.05
g/cm.sup.3. The low density microspheres generally have a diameter
less than 200 .mu.m, preferably less than 100 .mu.m, most
preferably less than 40 .mu.m. Preferably, the density difference
between the cleansing phase and the benefit phase is less than 0.15
g/cm.sup.3, more preferably, the density difference is less than
0.10 g/cm.sup.3, even more preferably, the density difference is
less than 0.05g/cm.sup.3, most preferably, the density difference
is less than 0.01 g/cm.sup.3.
[0049] The microspheres are produced from any appropriate inorganic
or organic material, compatible with a use on the skin, that is,
nonirritating and nontoxic. Preferably, the microspheres don't
negatively impact the product lather performance.
[0050] Expanded microspheres made of thermoplastic material are
known, and may be obtained, for example, according to the processes
described in Patents and Patent Applications EP-56219, EP-348372,
EP-486080, EP-320473, EP-1 12807 and U.S. Pat. No. 3,615,972.
[0051] These microspheres may be produced from any nontoxic and
non-irritant thermoplastic materials. Polymers or copolymers of
acrylonitrile or of vinylidene chloride may be used, for example.
It is possible to use, for example, a copolymer containing, by
weight, from 0 to 60% of units derived from vinylidene chloride,
from 20 to 90% of units derived from acrylonitrile and from 0 to
50% of units derived from an acrylic or styrene monomer, the sum of
the percentages (by weight) being equal to 100. The acrylic monomer
is, for example, a methyl or ethyl acrylate or methacrylate. The
styrene monomer is, for example, alpha-methylstyrene or styrene.
These microspheres can be in the dry or hydrated state.
[0052] The internal cavity of expanded hollow microspheres contains
a gas, which can be a hydrocarbon such as isobutane or isopentane
or alternatively air. Among hollow microspheres which can be used,
special mention may be made of those marketed under the brand name
EXPANCEL.RTM. (thermoplastic expandable microspheres) by the Akzo
Nobel Company, especially those of DE (dry state) or WE (hydrated
state) grade. Examples include: Expancel.RTM. 091 DE 40 d30;
Expancel.RTM. 091 DE 80 d30; Expancel.RTM. 051 DE 40 d60;
Expancel.RTM. 091 WE 40 d24; Expancel.RTM. 053 DE 40 d20.
[0053] Representative microspheres derived from an inorganic
material, include, for instance, "Qcel.RTM. Hollow Microspheres"
and "EXTENDOSPHERES.TM. Ceramic Hollow Spheres", both available
from the PQ Corporation. Examples are: Qcel .RTM. 300; Qcel .RTM.
6019; Qcel .RTM. 6042S.
[0054] Just as low density microspheres can be added to the
cleansing phase of the present invention to improve vibrational
stability, high density materials can be added to the benefit phase
to increase its density having the same impact on stability.
Optional Ingredients for use in the Cleansing Phase
[0055] Other suitable optional ingredients in the cleansing phase
are one or more humectants and solutes. A variety of humectants and
solutes can be employed and can be present at a level of from about
0.1% to about 50%, preferably from about 0.5% to about 35%, and
more preferably from about 2% to about 20% of a non-volatile,
organic material having a solubility of a least 5 parts in 10 parts
water. A preferred water soluble, organic material is selected from
the group consisting of a polyol of the structure:
R1--O(CH.sub.2--CR2HO).sub.nH where R1=H, C1-C4 alkyl; R2=H,
CH.sub.3 and n=1-200; C2-C10 alkane diols; guanidine; glycolic acid
and glycolate salts (e.g. ammonium and quaternary alkyl ammonium);
lactic acid and lactate salts (e.g. ammonium and quaternary alkyl
ammonium); polyhydroxy alcohols such as sorbitol, glycerol,
hexanetriol, propylene glycol, hexylene glycol and the like;
polyethylene glycol; sugars and starches; sugar and starch
derivatives (e.g. alkoxylated glucose); panthenol (including D-,
L-, and the D,L-forms); pyrrolidone carboxylic acid; hyaluronic
acid; lactamide monoethanolamine; acetamide monoethanolamine; urea;
and ethanol amines of the general structure
(HOCH.sub.2CH.sub.2).sub.xNH.sub.y where x=1-3; y=0-2, and x+y=3,
and mixtures thereof. The most preferred polyols are selected from
the group consisting of glycerine, polyoxypropylene(1) glycerol and
polyoxypropylene(3) glycerol, sorbitol, butylene glycol, propylene
glycol, sucrose, urea and triethanol amine.
[0056] Nonionic polyethylene/polypropylene glycol polymers are
preferably used as skin conditioning agents. Polymers useful herein
that are especially preferred are PEG-2M wherein x equals 2 and n
has an average value of about 2,000 (PEG 2-M is also known as
Polyox WSR.RTM. N-10 from Union Carbide and as PEG-2,000); PEG-5M
wherein x equals 2 and n has an average value of about 5,000 (PEG
5-M is also known as Polyox WSR.RTM. 35 and Polyox WSR.RTM. N-80,
both from Union Carbide and as PEG-5,000 and Polyethylene Glycol
200,000); PEG-7M wherein x equals 2 and n has an average value of
about 7,000 (PEG 7-M is also known as Polyox WSR.RTM. (N-750 from
Union Carbide); PEG-9M wherein x equals 2 and n has an average
value of about 9,000 (PEG 9-M is also known as Polyox WSR.RTM.
N-3333 from Union Carbide); PEG-14 M wherein x equals 2 and n has
an average value of about 14,000 (PEG 14-M is also known as Polyox
WSR-205 and Polyox WSR.RTM. N-3000 both from Union Carbide); and
PEG-90M wherein x equals 2 and n has an average value of about
90,000 (PEG-90M is also known as Polyox WSR.RTM.-301 from Union
Carbide.)
[0057] Other non limiting examples of these optional ingredients
include vitamins and derivatives thereof (e.g., ascorbic acid,
vitamin E, tocopheryl acetate, and the like); sunscreens;
thickening agents (e.g., polyol alkoxy ester, available as Crothix
from Croda); preservatives for maintaining the anti microbial
integrity of the cleansing compositions; anti-acne medicaments
(resorcinol, salicylic acid, and the like); antioxidants; skin
soothing and healing agents such as aloe vera extract, allantoin
and the like; chelators and sequestrants; and agents suitable for
aesthetic purposes such as fragrances, essential oils, skin
sensates, pigments, pearlescent agents (e.g., mica and titanium
dioxide), lakes, colorings, and the like (e.g., clove oil, menthol,
camphor, eucalyptus oil, and eugenol).
[0058] Non limiting examples of suitable carboxylic copolymers,
emulsifiers, emollients, and other additional ingredients are
disclosed in U.S. Pat. No., 5,011,681, to Ciotti et al., issued
Apr. 30, 1991.
[0059] Without wishing to be bound by theory, it is believed that
in some examples the compositions of the invention may have a
lamellar structure. The compositions of the invention have
free-flowing Non-Newtonian shear-thinning properties and the
ability to suspend components (which are known characteristics of
lamellar phase surfactant compositions).
[0060] In another preferred embodiment of the present invention the
surfactant compositions for use in the cleansing phase exhibiting
Non-Newtonian shear thinning behavior (herein referred to as free
flowing compositions). These surfactant compositions comprise
water, at least one anionic surfactant, an electrolyte and at least
one alkanolamide. It has been found that by employing a cleansing
phase exhibiting Non-Newtonian shear thinning behavior, the
stability of the resulting personal cleansing composition may be
increased. The alkanolamide if present has the general structure
of: ##STR4## wherein R is C.sub.8 to C.sub.24 or preferably in some
embodiments C.sub.8 to C.sub.22 or in other embodiments C.sub.8 to
C.sub.18 saturated or unsaturated straight chain or branched
aliphatic group, R.sub.1 and R.sub.2 are the same or different
C.sub.2-C.sub.4 straight chain or branched aliphatic group, x=0 to
10; y=1- 10 and wherein the sum of x and y is less than or equal to
10.
[0061] The amount of alkanolamide in the composition is typically
about 0.1% to about 10% by weight, and in some embodiments is
preferably about 2% to about 5% by weight of the cleansing phase.
Some preferred alkanolamides include Cocamide MEA (Coco
monethanolamide) and Cocamide MIPA (Coco
monoisopropranolamide).
[0062] The electrolyte, if used, can be added per se to the
composition or it can be formed in situ via the counter-ions
included in one of the raw materials. The electrolyte preferably
includes an anion comprising phosphate, chloride, sulfate or
citrate and a cation comprising sodium, ammonium, potassium,
magnesium or mixtures thereof. Some preferred electrolytes are
sodium or ammonium chloride or sodium or ammonium sulfate.
[0063] The electrolyte, when present, should be present in an
amount, which facilitates formation of the free flowing
composition. Generally, this amount is from about 0.1% by weight to
about 15% by weight, preferably from about 1% to about 6% by weight
of the cleansing phase, but may be varied if required.
[0064] Frequently surfactants are sold as solutions in water or
other solvents which dilute them to less than 100% active
surfactant, therefore the "active surfactant" means actual amount
of surfactant delivered to the free flowing composition from a
commercial surfactant preparation.
[0065] The total amount of all surfactants e.g. anionic
surfactants, nonionic surfactants, amphoteric and/or zwitterionic
surfactants, and cationic surfactants taken together, is typically
about 8 to about 30% active surfactant and preferably about 10 to
about 20% active surfactant. In some embodiments it is preferable
that at least one of the surfactants has an aliphatic chain that
has branching or unsaturation or a combination thereof.
Viscosity of Cleansing Phase Composition
[0066] The Wells-Brookfield Cone/Plate Model DV-II+ can be used to
determine the viscosity of the personal cleansing composition
described herein. The determination is performed at 25.degree. C.
with 2.4 cm 3.degree. cone measuring system with a gap of 0.013 mm
between the two small pins on the respective cone and plate. The
measurement is performed by injecting 0.5 ml. of the sample to be
analyzed between the cone and the plate and toting the cone at a
set speed of 1 rpm. The resistance to rotation of the cone produces
a torque that is proportional to the shear stress of the liquid
sample. The amount of torque is read and computed by the viscometer
into absolute centipoises units (cps) based on geometric constant
of the cone, the rate of rotation, and the stress related
torque.
[0067] Preferably, the cleansing phase has a viscosity of greater
than 3,000 cps. More preferably, the viscosity is greater than
5,000 cps. Even more preferably, the viscosity is greater than
10,000 cps. Most preferably, the viscosity is greater than 20,000
cps.
Yield Point of Cleansing Phase Composition
[0068] The Carrimed CSL 100 Controlled Stress Rheometer can be used
to determine the yield point of the personal cleansing composition
described herein. For purposes herein, the yield point is the
amount of stress required to produce a strain of 1% on the personal
cleansing composition. The determination is performed at 25.degree.
C with the 4 cm 2.degree. cone measuring system set with a 51
micron gap. The determination is performed via the programmed
application of shear stress (typically from about 0.06 dynes/sq.
centimeter to about 500 dynes/sq. centimeter) over time. This
amount of stress results in a deformation of the sample. A shear
stress versus strain curve can be created. From this curve, the
yield point of the personal cleansing composition can be
calculated.
[0069] Preferably, the cleansing phase has a yield point of greater
than 0.1 Pascal. More preferably, the yield point is greater than 1
Pascal. Even more preferably, the yield point is greater than 10
Pascal. Most preferably, the yield point is greater than 30
Pascal.
Benefit Phase
[0070] The separate benefit phase in the present invention is
preferably anhydrous. The benefit phase comprises from about 20% to
about 100%, preferably at least about 35%, most preferably at least
about 50% of a hydrophobic skin benefit agent. The benefit agents
suitable for use in the present invention have a Vaughan Solubility
Parameter of from about 5 to about 15. The benefit agents are
preferably selected among those having defined rheological
properties as described hereinafter, including selected Consistency
(k) and Shear Index (n). These preferred rheological properties are
especially useful in providing the personal cleansing compositions
with improved deposition of benefit agents on skin.
[0071] Vaughan Solubility Parameter Value (VSP)
[0072] The hydrophobic skin benefit agent for use in the benefit
phase of the composition has a Vaughan Solubility Parameter (VSP)
of from about 5 to about 15, preferably from about 6 to less than
10, more preferably from about 6 to about 9. These solubility
parameters are well known in the formulation arts, and are defined
by Vaughan in Cosmetics and Toiletries, Vol. 103, p47-69, October
1988.
[0073] Non-limiting examples of hydrophobic skin benefit agent
having VSP values ranging from about 5 to about 15 include the
following: TABLE-US-00001 VAUGHAN SOLUBILITY PARAMETERS*
Cyclomethicone 5.92 Squalene 6.03 Petrolatum 7.33 Isopropyl
Palmitate 7.78 Isopropyl Myristate 8.02 Castor Oil 8.90 Cholesterol
9.55 *As reported in Solubility, Effects in Product, Package,
Penetration and Preservation, C. D. Vaughan, Cosmetics and
Toiletries, Vol. 103, October 1988.
[0074] B) Rheology
[0075] The hydrophobic skin benefit agents for use in the benefit
phase of the composition have a preferred rheology profile as
defined by Consistency (k) and Shear Index (n). Preferred
Consistency ranges are 1-10,000 poise (1/sec).sup.n-1, preferably
10-2000 poise (1/sec).sup.n-1 and more preferably 50-1000 poise
(1/sec).sup.n-1. Shear Index ranges are 0.1-0.8, preferably 0.1-0.5
and more preferably 0.20-0.4.
[0076] The hydrophobic skin benefit agents can be characterized by
Consistency (k) and Shear Index (n) values as defined by the
above-described ranges, wherein these defined ranges are selected
to provide enhanced deposition and reduced stickiness during and
after application of the personal cleaning composition on hair or
skin.
[0077] The Shear index (n) and Consistency (k) values are well
known and accepted industry standards for reporting the viscosity
profile of materials having a viscosity that is a function of an
applied shear rate.
[0078] The viscosity (.mu.) for any material can be characterized
by the relationship or equation [.mu.=.sigma./.gamma.'] wherein
.sigma. is shear stress and .gamma.' is shear rate, so that the
viscosity for any material can be measured by either applying a
shear rate and measuring the resultant shear stress or vice
versa.
[0079] The Carrimed CSL 100 Controlled Stress Rheometer is used to
determine Shear Index, n, and Consistency, k, for the hydrophobic
skin benefit agents herein. The determination is performed at
35.degree. C. with the 4 cm 2.degree. cone measuring system
typically set with a 51 micron gap and is performed via the
programmed application of a shear stress (typically from about 0.06
dynes/sq. cm to about 5,000 dynes/sq. cm) over time. If this stress
results in a deformation of the sample, i.e. strain of the
measuring geometry of at least 10-4 rad/sec, then this rate of
strain is reported as a shear rate. These data are used to create a
viscosity (.mu.) versus shear rate (.gamma.') flow curve for the
hydrophobic skin benefit agent material. This flow curve can then
be modeled in order to provide a mathematical expression that
describes the material's behavior within specific limits of shear
stress and shear rate. These results are fitted with the following
well-accepted power law model (see for instance: Chemical
Engineering, by Coulson and Richardson, Pergamon, 1982 or Transport
Phenomena by Bird, Stewart and Lightfoot, Wiley, 1960):
[.mu.=k(.gamma.').sup.n-1]
[0080] The Carrimed CSL 100 Controlled Stress Rheometer is used to
perform oscillatory tests at 35.degree. C. with the 4 cm 2.degree.
cone measuring system typically set with a 51 micron gap. The
oscillatory tests at 35.degree. C. are carried out in 2 steps. The
first step is a stress amplitude sweep at the expected starting and
ending frequencies for the frequency sweep. These tests allow a
determination to be made as to whether or not the test conditions
are within the linear viscoelastic region for the test material
over the anticipated frequency range. The linear viscoelastic
region is a region where there is a linear relationship between
stress and strain. The second step is a frequency sweep made at a
stress level within that linear viscoelastic region. The frequency
sweep allows the test material's viscoelastic behavior to be
measured. The oscillatory test on a controlled stress rheometer is
performed by applying a stress in an oscillatory manner and
measuring the resulting oscillatory strain response and the phase
shift between the applied stress wave form and the resulting strain
wave form in the test material. The resulting complex modulus is
expressed as a combination of the material's elastic (G') and
viscous (G'') components. The elastic modulus G' is a measure of a
materials ability to store recoverable energy. This energy storage
can be the result of the ability of a complex polymer, structural
network, or a combination of these to recover stored energy after a
deformation. The viscous or loss modulus G'' is a measure of the
unrecoverable energy, which has been lost due to viscous flow.
[0081] The hydrophobic skin benefit agents suitable for use herein
can include a variety of hydrocarbons, oils and waxes, silicones,
fatty acid derivatives, cholesterol, cholesterol derivatives,
diglycerides, triglycerides, vegetable oils, vegetable oil
derivatives, acetoglyceride esters, alkyl esters, alkenyl esters,
lanolin and its derivatives, wax esters, beeswax derivatives,
sterols and phospholipids, and combinations thereof.
[0082] Non-limiting examples of hydrocarbon oils and waxes suitable
for use herein include petrolatum, mineral oil, micro-crystalline
waxes, polyalkenes, paraffins, cerasin, ozokerite, polyethylene,
perhydrosqualene, and combinations thereof.
[0083] Non-limiting examples of silicone oils suitable for use as
hydrophobic skin benefit agents herein include dimethicone
copolyol, dimethylpolysiloxane, diethylpolysiloxane, mixed C1-C30
alkyl polysiloxanes, phenyl dimethicone, dimethiconol, and
combinations thereof. Preferred are non-volatile silicones selected
from dimethicone, dimethiconol, mixed C1-C30 alkyl polysiloxane,
and combinations thereof. Nonlimiting examples of silicone oils
useful herein are described in U.S. Pat. No. 5,011,681 (Ciotti et
al.).
[0084] Non-limiting examples of diglycerides and triglycerides
suitable for use as hydrophobic skin benefit agents herein include
castor oil, soy bean oil, derivatized soybean oils such as maleated
soy bean oil, safflower oil, cotton seed oil, corn oil, walnut oil,
peanut oil, olive oil, cod liver oil, almond oil, avocado oil, palm
oil and sesame oil, vegetable oils, sunflower seed oil, and
vegetable oil derivatives; coconut oil and derivatized coconut oil,
cottonseed oil and derivatized cottonseed oil, jojoba oil, cocoa
butter, and combinations thereof.
[0085] Non-limiting examples of acetoglyceride esters suitable for
use as hydrophobic skin benefit agents herein include acetylated
monoglycerides.
[0086] Non-limiting examples of alkyl esters suitable for use as
hydrophobic skin benefit agents herein include isopropyl esters of
fatty acids and long chain esters of long chain (i.e.
C.sub.10-C.sub.24) fatty acids, e.g. cetyl ricinoleate,
non-limiting examples of which incloude isopropyl palmitate,
isopropyl myristate, cetyl riconoleate and stearyl riconoleate.
Other examples are: hexyl laurate, isohexyl laurate, myristyl
myristate, isohexyl palmitate, decyl oleate, isodecyl oleate,
hexadecyl stearate, decyl stearate, isopropyl isostearate,
diisopropyl adipate, diisohexyl adipate, dihexyldecyl adipate,
diisopropyl sebacate, acyl isononanoate lauryl lactate, myristyl
lactate, cetyl lactate, and combinations thereof.
[0087] Non-limiting examples of alkenyl esters suitable for use as
hydrophobic skin benefit agents herein include oleyl myristate,
oleyl stearate, oleyl oleate, and combinations thereof.
[0088] Non-limiting examples of lanolin and lanolin derivatives
suitable for use as hydrophobic skin benefit agents herein include
lanolin, lanolin oil, lanolin wax, lanolin alcohols, lanolin fatty
acids, isopropyl lanolate, acetylated lanolin, acetylated lanolin
alcohols, lanolin alcohol linoleate, lanolin alcohol riconoleate,
and combinations thereof.
[0089] Still other suitable hydrophobic skin benefit agents include
milk triglycerides (e.g., hydroxylated milk glyceride) and polyol
fatty acid polyesters.
[0090] Still other suitable hydrophobic skin benefit agents include
wax esters, non-limiting examples of which include beeswax and
beeswax derivatives, spermaceti, myristyl myristate, stearyl
stearate, and combinations thereof. Also useful are vegetable waxes
such as carnauba and candelilla waxes; sterols such as cholesterol,
cholesterol fatty acid esters; and phospholipids such as lecithin
and derivatives, sphingo lipids, ceramides, glycosphingo lipids,
and combinations thereof.
[0091] The benefit phase of the composition preferably comprises
one or more hydrophobic skin benefit agents, wherein at least 20%
by weight of the hydrophobic skin benefit agents are selected from
petrolatum, mineral oil, sunflower seed oil, micro-crystalline
waxes, paraffins, ozokerite, polyethylene, polybutene, polydecene
and perhydrosqualene dimethicones, cyclomethicones, alkyl
siloxanes, polymethylsiloxanes and methylphenylpolysiloxanes,
lanolin, lanolin oil, lanolin wax, lanolin alcohols, lanolin fatty
acids, isopropyl lanolate, acetylated lanolin, acetylated lanolin
alcohols, lanolin alcohol linoleate, lanolin alcohol riconoleate,
castor oil, soy bean oil, maleated soy bean oil, safflower oil,
cotton seed oil, corn oil, walnut oil, peanut oil, olive oil, cod
liver oil, almond oil, avocado oil, palm oil and sesame oil, and
combinations thereof. More preferably, at least about 50% by weight
of the lipophilic skin conditioning agents are selected from the
groups of petrolatum, mineral oil, paraffins, polyethylene,
polybutene, polydecene, dimethicones, alkyl siloxanes,
cyclomethicones, lanolin, lanolin oil, lanolin wax. The remainder
of the lipophilic skin conditioning agent is preferably selected
from: isopropyl palmitate, cetyl riconoleate, octyl isononanoate,
octyl palmitate, isocetyl stearate, hydroxylated milk glyceride and
combinations thereof.
Stability Enhancers
[0092] Structurants
[0093] The benefit phase of the striped personal cleansing
composition can comprise a structurant, which improves the high
temperature stability of the composition. Preferred structurants
suitable that can be used in the present invention include those
structurants that are immiscible in the aqueous cleansing phase and
may take the form of a wax, hydrophobic silica, hydrophobic clay,
polymer or mixtures thereof. In one embodiment of the present
invention, the structurant can comprise a crystalline,
hydroxyl-containing stabilizer. Tri-hydroxystearin is most
preferred. Tri hydroxystearin is available commercially as Thixcin
R from Rheox and as Flowtone from Southern Clay Products.
[0094] Additionally, the structurant can comprise hydrophobically
modified dispersed amorphous silica. As used herein the term
"dispersed amorphous silica" refers to small, finely divided
non-crystalline silica having a mean agglomerate particle size of
less than about 100 microns.
[0095] Fumed silica, is produced by the vapor phase hydrolysis of
silicon tetrachloride in a hydrogen oxygen flame. It is believed
that the combustion process creates silicone dioxide molecules
which condense to form particles.
[0096] The particles collide, attach and sinter together. The
result of this process is a three dimensional branched chain
aggregate. Once the aggregate cools below the fusion point of
silica, which is about 1710.degree. C., further collisions result
in mechanical entanglement of the chains to form agglomerates.
Precipitated silicas and silica gels are generally made in aqueous
solution. See, Cabot Technical Data Pamphlet TD-100 entitled
"CAB-O-SIL@ Untreated Fumed Silica Properties and Functions",
October 1993, and Cabot Technical Data Pamphlet TD-104 entitled
"CAB-O- SIL@ Fumed Silica in Cosmetic and Personal Care Products",
March 1992.
[0097] The fumed silica preferably has a mean agglomerate particle
size ranging from about 0.1 microns to about 100 microns, more
preferably from about 1 micron to about 50 microns, and more
preferably still from about 10 microns to about 30 microns. The
agglomerates are composed of aggregates which have a mean particle
size ranging from about 0.01 microns to about 15 microns,
preferably from about 0.05 microns to about 10 microns, more
preferably from about 0.1 microns to about 5 microns and more
preferably still from about 0.2 microns to about 0.3 microns. The
silica preferably has a surface area greater than 50 sq. m/gram,
more preferably greater than about 130 sq. m/gram, and more
preferably still greater than about 180 sq. m./gram.
[0098] The fumed silica is hydrophobically modified via the
addition of non-polar moieties to the surface of the silica.
Exemplary hydrophobically modified fumed silicas for use in the
present invention include, but are not limited to, silica dimethyl
silylate whereby the surface of the fumed silica has been modified
with dimethyl silyl groups available commercially as Aerosil R972
and Aerosil R974 both available from Degussa; and CAB-O-SIL TS-610
and CAB-O-SIL TS-720 both available from Cabot- and silica silylate
whereby the surface of the fumed silica has been modified with
trimethylsiloxyl groups available commercially as Aerosil R812 and
Sipernat D17 both available from Degussa- and CAB SIL TS-530
available from Cabot.
[0099] Additionally, the structurant can comprise hydrophobically
modified dispersed smectite clay selected from the group consisting
of bentonite, hectorite and mixtures thereof. Bentonite is a
colloidal aluminum clay sulfate. See Merck Index, Eleventh Edition,
1989, entry 1062, p. 164. Hectorite is a clay containing sodium,
magnesium, lithium, silicon, oxygen, hydrogen and fluorine. See
Merck Index, Eleventh Edition, 1989, entry 4538, p. 729.
[0100] Hyrophobically modified dispersed smectite clays are called
organoclays and are formed by reacting monoquaternary compounds
with the smectite clays to form an organoclay complex. Non-limiting
examples of organoclays for use in the present invention include
dihydrogenated tallow benzylmonium hectorite available commercially
as Bentone SD-3 from Rheox; quaternium-18 hectorite available
commercially as Bentone and in mixtures M-P-A 14, Bentone Gel DOA,
Bentone Gel ECO 5, Bentone Gel EUG, Bentone Gel IPP, Bentone Gel
ISD, Bentone Gel MIO, Bentone Gel MIO-A40, Bentone Gel SS-71,
Bentone Gel 10ST, Bentone Gel VS-5, Bentone Gel VS-8, Bentone Gel
VS-38, Bentone Gel VS-5PC, and Bentone Gel YVS all available from
Rheox, quaternium-18 bentonite available commercially as Bentone 34
from Rheox and Claytone 40 and Claytone SO from Southern
Clay-quaternium-18/benzalkonium bentonite available commercially as
Claytone HT from Southern Clay-stearalkonium bentonite available
commercially as Claytone AF from Southern Clay, Toxogel LG and
Tixogel VZ from United Catalysts, and Viscogel B7 from Bentec- and
stearalkonium hectorite available commercially as Bentone 27 from
Rheox and in mixtures Bentone Gel CAO, Bentone Gel IPM, Bentone Gel
LOI, Bentone Gel M-20, Bentone Gel RSS, Bentone Gel SIL, and
Bentone Gel TN, all from Rheox.
[0101] The structurant can also comprise the use of metal soaps,
homopolymers, ionic homo- and copolymers and block copolymers. Some
common gelling agents which can be used in the present invention
include fatty acid soaps of lithium, calcium, sodium, aluminum,
zinc and barium. A number of homo-and copolymers can also be used
including atactic ethylene-propylene. Homopolymers or copolymers
which have pendant salt groups also form ion rich aggregates in a
non-polar matrix. The ionic interaction and resultant polymer
properties of these compositions, however, are dependent on the
type of polymer backbone, type of ionic moiety and type of cation.
Sulfonated polystyrenes exemplify this kind of system. Block
systems used in the present invention include styrene-isoprene,
styrene-butadiene and styrene ethylene oxide copolymers.
[0102] Commercially available thermoplastic rubber type polymers
are especially useful as structurants in the benefit phase. They
are sold under the trademark Kraton.RTM. by Shell Chemical Company.
The Kraton.RTM. rubber polymers are described as elastomers which
have an unusual combination of high strength and low viscosity and
a unique molecular structure of linear diblock, triblock and radial
polymers. Each molecule of the Kraton.RTM. rubber is said to
consist of block segments of styrene monomer units and rubber
monomer units. Each block segment may consist of 100 monomer units
or more. The most common structure is the linear ABA block type;
styrene-butadiene-styrene (SBS) and styrene-isoprene-styrene (SIS),
the Kratong D rubber series. A second generation polymer of this
series is the Kraton.RTM. G series which are
styrene-ethylene-butylene-styrene type (S-EB-S) polymers. Diblock
polymers include the ABA type and the SB, styrene-ethylenepropylene
(S-EP) and (S-EB). The ABA structure of the Kraton.RTM. rubber
molecule has polystyrene endblocks and elastomeric midblocks.
Examples of Kroton.RTM. are G1701, G1702, D1107, D1111, D1320
available from Shell Company. It is preferred that blends of di-
and triblock copolymers are used as benefit phase structurants in
the present invention. Gelled hydrocarbon oils using blends of di-
and triblock copolymers are commercially available from Penreco
under the tradename Versagel. For example, Versagel M is a gelled
mineral oil base, Versagel ME is a gelled hydrogenated
polyisobutene base, Versagel MP is a gelled isopropyl palmitate
base, Versagel MC is a gelled isohexadecane base, and Versagel MD
is a gelled isododecane base.
[0103] When present he benefit phase typically contains
structurants in an amount of from about 0.01% to about 30%, more
preferably from about 0.1% to about 20%, and more preferably still
from about 1% to about 10%, based on the weight of the benefit
phase.
[0104] The separate benefit phase of the striped liquid personal
cleansing compositions may optionally comprise the following skin
benefit ingredients for enhanced delivery of these benefit
materials on skin. Preferred concentrations of optional ingredients
range from about 0.1% to about 10%, more preferably from about 0.2%
to about 5%, even more preferably from about 0.5% to about 4%, by
weight of the personal cleansing composition.
[0105] Suitable optional ingredients include but are not limited to
desquamation actives, anti-acne actives, anti-wrinkle/anti-atrophy
actives, anti-oxidants or radical scavengers, chelating agents,
flavonoids, anti-inflammatory agents, anti-cellulite agents,
topical anesthetics, tanning agents, skin lightening agents, skin
soothing or skin healing actives, antimicrobial actives, sunscreen
actives, and solid particulates.
[0106] The personal cleansing compositions of the present invention
may further comprise other optional ingredients that may modify the
physical, chemical, cosmetic or aesthetic characteristics of the
compositions or serve as additional "active" components when
deposited on the skin. The compositions may also further comprise
optional inert ingredients. Many such optional ingredients are
known for use in personal care compositions, and may also be used
in the personal cleansing compositions herein, provided that such
optional materials are compatible with the essential materials
described herein, or do not otherwise unduly impair product
performance.
[0107] Such optional ingredients are most typically those materials
approved for use in cosmetics and that are described in reference
books such as the CTFA Cosmetic Ingredient Handbook, Second
Edition, The Cosmetic, Toiletries, and Fragrance Association, Inc.
1988, 1992. These optional materials can be used in any aspect of
the compositions of the present invention, including either of the
active or cleansing phases as described herein.
[0108] Optional ingredients for use in the cleansing phase of the
compositions of the present invention can include any benefit phase
material as described herein that is also compatible with the
selected ingredients in the cleansing phase. Likewise, optional
ingredients for use in the benefit phase of the compositions of the
present invention can include any cleansing phase material
described herein that is also compatible with the selected
ingredients in the benefit phase.
[0109] Other optional ingredients for use in either phase of the
composition, preferably the benefit phase, include silicone
elastomer powders and fluids to provide any of a variety of product
benefits, including improved product stability, application
cosmetics, emolliency, conditioning, and so forth. The
concentration of the silicone elastomers in the composition
preferably ranges from about 0.1% to about 20%, more preferably
from about 0.5% to about 10%, by weight of the composition. In this
context, the weight percentages are based upon the weight of the
silicone elastomers material itself, excluding any
silicone-containing fluid that typically accompanies such silicone
elastomers materials in the formulation process. The silicone
elastomers suitable for optional use herein include emulsifying and
non-emulsifying silicone elastomers, non-limiting examples of which
are described in U.S. Ser. No. 09/613,266 (assigned to The Procter
& Gamble Company).
Density Modifiers
[0110] Just as low density microspheres can be added to the
cleansing phase of the present invention to improve stability, high
density materials can be added to the benefit phase to increase its
density having the same impact on stability. The high density
particles employed to increase the overall density of the benefit
phase are particles having a density greater than 1.1 g/cm.sup.3,
preferably greater than 1.5 g/cm.sup.3, more preferably greater
than 2.0 g/cm.sup.3, most preferably greater than 2.5 g/cm.sup.3.
The high density particles generally have a diameter less than 200
.mu.m, preferably less than 100 .mu.m, most preferably less than 40
.mu.m. Preferably, the high density particles are selected from
water-insoluble inorganic materials, metals, metal oxides, metal
alloys and mixture thereof. Non-limiting examples include calcium
carbonate, silica, clays, mica, talc, iron, zinc, copper, lead,
titanium dioxide, zinc oxide, and the like.
Method of Use
[0111] The striped personal cleansing compositions of the present
invention are preferably applied topically to the desired area of
the skin or hair in an amount sufficient to provide effective
delivery of the skin conditioning agent to the applied surface, or
to otherwise provide effective skin conditioning benefits. The
compositions can be applied directly to the skin or indirectly via
the use of a cleansing puff, washcloth, sponge or other implement.
The compositions are preferably diluted with water prior to,
during, or after topical application, and then subsequently rinsed
or wiped off of the applied surface, preferably rinsed off of the
applied surface using water or a water-insoluble substrate in
combination with water.
[0112] If the personal cleansing compositions contain stripes of
varying colors it may be desirable to package these compositions in
a transparent package such that the consumer can view the pattern
through the package. Because of the viscosity of the subject
compositions it may also be desirable to include instructions to
the consumer to store the package upside down, on its cap to
facilitate dispensing.
[0113] The present invention is therefore also directed to methods
of cleansing the skin through the above-described application of
the compositions of the present invention. The methods of the
present invention are also directed to a method of providing
effective delivery of the desired skin active agent, and the
resulting benefits from such effective delivery as described
herein, to the applied surface through the above-described
application of the compositions of the present invention.
Method of Manufacture
[0114] The personal cleansing compositions of the present invention
may be prepared by any known or otherwise effective technique,
suitable for making and formulating the desired striped product
form. It is especially effective to combine toothpaste-tube filling
technology with a spinning stage design. Specific non-limiting
examples of such methods as they are applied to specific
embodiments of the present invention are described in the following
examples.
Lather Volume
[0115] Lather volume of a striped liquid personal cleansing
composition is measured using a graduated cylinder and a tumbling
apparatus. A 1,000 ml graduated cylinder is chosen which is marked
in 10 ml increments and has a height of 14.5 inches at the 1,000 ml
mark from the inside of its base (for example, Pyrex No. 2982).
Distilled water (100 grams at 23.degree. C.) is added to the
graduated cylinder. The cylinder is clamped in a rotating device
which clamps the cylinder with an axis of rotation that transects
the center of the graduated cylinder. One gram of the total
personal cleansing composition (0.5 g of the cleansing phase and
0.5 g of the benefit phase) is added into the graduated cylinder
and the cylinder is capped. The cylinder is rotated at a rate of 10
revolutions in about 20 seconds, and stopped in a vertical position
to complete the first rotation sequence. A timer is set to allow 30
seconds for the lather thus generated to drain. After 30 seconds of
such drainage, the first lather volume is measured to the nearest
10 ml mark by recording the lather height in ml up from the base
(including any water that has drained to the bottom on top of which
the lather is floating).
[0116] If the top surface of the lather is uneven, the lowest
height at which it is possible to see halfway across the graduated
cylinder is the first lather volume (ml). If the lather is so
coarse that a single or only a few foam cells ("bubbles") reach
across the entire cylinder, the height at which at least 10 foam
cells are required to fill the space is the first lather volume,
also in ml up from the base. Foam cells larger than one inch in any
dimension, no matter where they occur, are designated as unfilled
air instead of lather. Foam that collects on the top of the
graduated cylinder but does not drain is also incorporated in the
measurement if the foam on the top is in its own continuous layer,
by adding the ml of foam collected there using a ruler to measure
thickness of the layer, to the ml of foam measured up from the
base. The maximum foam height is 1,000 ml (even if the total foam
height exceeds the 1,000 ml mark on the graduated cylinder). One
minute after the first rotation is completed, a second rotation
sequence is commenced which is identical in speed and duration to
the first rotation sequence. The second lather volume is recorded
in the same manner as the first, after the same 30 seconds of
drainage time. A third sequence is completed and the third lather
volume is measured in the same manner, with the same pause between
each for drainage and taking the measurement.
[0117] The lather result after each sequence is added together and
the Total Lather Volume determined as the sum of the three
measurements, in ml. The Flash Lather Volume is the result after
the first rotation sequence only, in ml, i.e., the first lather
volume. Compositions according to the present invention perform
significantly better in this test than similar compositions in
conventional emulsion form.
Density (Specific Gravity) Method
[0118] The metal pycnomoeter is utilized for determination of
density (specific gravity) of both the surfactant phase and the
benefit phase compositions. One suggested type of metal pycnometer
can be obtained from Fisher, 3-347. Other equivalent pycnometer can
also be used. Following procedure are the steps for measuring
density (specific gravity) of the cleansing phase and the benefit
phase compositions.
Step 1) Cleaning:
[0119] The metal pycnometer must be clean and dry before use.
Diassemble the metal pycnometer completely and wash all parts well
with water. Follow the water rinse with an alcohol rinse. Expel the
alcohol with a stream of dry, clean air.
Step 2) Standardization
[0120] Fill the clean, dry pycnometer with distilled water at 25 C.
Place the lid on body of pycnometer and screw the cap firmly in
place. Dry the outside of pycnometer well with a tissue and weigh
to 0.001 g. Clean and dry the pycnometer according to the
directions shown above. Assemble and weigh the dry pycnometer to
0.001 g.
[0121] Water weight=Weight of pycnometer and water - weight of
empty pycnometer Step 3) Sample Measurement
[0122] Clean and dry the pycnometer according to the directions
shown above. Allow the sample to equilibrate to room temperature.
Pour the sample into the pycnometer, taking care to avoid
introducing air into the sample in the pycnometer. Add an excess of
sample so that it extends slightly above the top of the threads.
Place the lid inside the cap and screw the cap firmly onto the body
of the pycnometer. Any excess sample will be forced through the
hole in the lid of the pycnometer. Wipe away the excess sample
carefully with a tissue. Weight the filled pycnometer to 0.001
g.
[0123] Sample Weight=Weight of pycnometer and sample--weight of
pycnometer. Step 4) Specific Gravity =Weight of Sample/Weight of
Water
[0124] The density difference between the cleansing phase and the
benefit phase is less than 0.15 g/cm.sup.3, preferably, the density
difference is less than 0.10 g/cm.sup.3, more preferably, the
density difference is less than 0.05g/cm.sup.3, most preferably,
the density difference is less than 0.01 g/cm.sup.3.
EXAMPLES
[0125] The following examples further describe and demonstrate
embodiments within the scope of the present invention. The examples
are given solely for the purpose of illustration and are not to be
construed as limitations of the present invention, as many
variations thereof are possible without departing from the spirit
and scope of the invention. All exemplified amounts are
concentrations by weight of the total composition, i.e., wt/wt
percentages, unless otherwise specified.
[0126] Each of the exemplified compositions provides improved
deposition or effectiveness of the skin conditioning agents or
optional ingredients delivered from each prepared composition.
Examples 1-3
[0127] The following examples described in Table 1 are non-limiting
examples of cleansing phase and benefit phase compositions.
TABLE-US-00002 TABLE 1 Cleansing Phase and Benefit phase
Compositions Example 1 Example 2 Example 3 Ingredient wt % wt % Wt
% I. Cleansing Phase Composition Ammonium Laureth-3 Sulfate 3.0 3.0
3.0 Sodium Lauroamphoacetate 16.7 16.7 16.7 (Miranol L-32 Ultra
from Rhodia) Ammonium Lauryl Sulfate 1.0 1.0 1.0 Lauric Acid 0.9
0.9 0.9 Trihydroxystearin (Thixcin R) 2.0 2.0 2.0 Guar
Hydroxypropyltrimonium Chloride 0.17 0.75 0.75 (N-Hance 3196 from
Aqualon) Guar Hydroxypropyltrimonium Chloride (Jaguar C- 0.58 -- --
17 from Rhodia) Polyquaterium 10 0.45 -- -- (UCARE polymer JR-30M
from Amerchol) Polymethacrylamidopropyltrimonium Chloride -- 0.24
-- (Polycare 133 from Rhodia) Polyquaternium-39 -- 0.81 -- (Merqurt
Plus 3300 from Calgon) PEG 90M (Polyox WSR 301 from Union Carbide)
0.25 -- -- PEG-14M (Polyox WSR N-3000 H from Union 0.45 2.45 2.45
Carbide) Linoleamidoprypyl PG-Dimonium Chloride -- 1.0 4.0
Phosphate Dimethicone (Monasil PLN from Uniqema) Glycerin 1.4 4.9
4.9 Sodium Chloride 0.3 0.3 0.3 Sodium Benzoate 0.25 0.25 0.25
Disodium EDTA 0.13 0.13 0.13 Glydant 0.37 0.37 0.37 Citric Acid 1.6
0.95 0.95 Titanium Dioxide 0.5 0.5 0.5 Perfume 0.5 0.5 0.5 Expancel
091 DE 40 d30 (from Expancel, Inc.) 0.4 0.4 0.4 Water Q.S. Q.S.
Q.S. II. Benefit phase Composition Petrolatum (SuperWhite Protopet
from WITCO) 75 99.92 90 Mineral Oil (Hydrobrite 1000 PO White MO
from 24.92 -- 9.92 WITCO) Pigment 0.08 0.08 0.08
[0128] The compositions described above can be prepared by
conventional formulation and mixing techniques. Prepare the
cleansing composition 1 by first creating the following premixes:
citric acid in water premix at 1:3 ratio, Guar polymer premix with
Jaguar C-17 and N-Hance 3196 in water at 1:10 ratio, UCARE premix
with JR-30M in water at about 1:30 ratio, and Polyox premix with
PEG-90M and PEG-14M in Glycerin at about 1:2 ratio. Then, add the
following ingredients into the main mixing vessel: ammonium lauryl
sulfate, ammonium laureth-3 sulfate, citric acid premix, Miranol
L-32 ultra, sodium chloride, sodium benzoate, disodium EDTA, lauric
acid, Thixcin R, Guar premix, UCARE premix, Polyox Premix, and the
rest of water. Heat the vessel with agitation until it reaches
190.degree. F. (88.degree. C.). Mix for about 10 min. Cool the
batch with a cold water bath with slow agitation until it reaches
110.degree. F. (43.degree. C.). Add the following ingredients:
Glydant, perfume, Titanium Dioxide, Expancel. Keep mixing until a
homogeneous solution forms.
[0129] Prepare the cleansing composition 2 by first creating the
following premixes: citric acid in water premix at 1:3 ratio, Guar
polymer premix with N-Hance 3196 in water at 1:10 ratio, and Polyox
premix with PEG-14M in Glycerin at about 1:2 ratio. Then, add the
following ingredients into the main mixing vessel: ammonium lauryl
sulfate, ammonium laureth-3 sulfate, citric acid premix, Miranol
L-32 ultra, sodium chloride, sodium benzoate, disodium EDTA, lauric
acid, Thixcin R, Guar premix, Polyox Premix, Polycare 133, Merquat
Plus 3300, Monosil PLN, and the rest of water. Heat the vessel with
agitation until it reaches 190.degree. F. (88.degree. C.). Mix for
about 10 min. Cool the batch with a cold water bath with slow
agitation until it reaches 110.degree. F. (43.degree. C.). Add the
following ingredients: Glydant, perfume, Titanium Dioxide,
Expancel. Keep mixing until a homogeneous solution forms.
[0130] Prepare the cleansing composition 3 by first creating the
following premixes: citric acid in water premix at 1:3 ratio, Guar
polymer premix with N-Hance 3196 in water at 1:10 ratio, and Polyox
premix with PEG-14M in Glycerin at about 1:2 ratio. Then, add the
following ingredients into the main mixing vessel: ammonium lauryl
sulfate, ammonium laureth-3 sulfate, citric acid premix, Miranol
L-32 ultra, sodium chloride, sodium benzoate, disodium EDTA, lauric
acid, Thixcin R, Guar premix, Polyox Premix, Monasil PLN, and the
rest of water. Heat the vessel with agitation until it reaches
190.degree. F. (88.degree. C.). Mix for about 10 min. Cool the
batch with a cold water bath with slow agitation until it reaches
110.degree. F. (43.degree. C.). Add the following ingredients:
Glydant, perfume, Titanium Dioxide, Expancel. Mix until a
homogeneous solution forms.
[0131] Prepare the benefit phase, add petrolatum into a mixing
vessel. Heat the vessel to 140.degree. F. (60.degree. C.). Then,
add mineral oil and cosmetic pigment with agitation. Let the vessel
cool down with slow agitation.
[0132] The cleansing and benefit phases are density matched to
within 0.05 g/cm.sup.3. Package both phases into a single container
using conventional toothpaste-tube filler equipment. The sample
stage spins the bottle during the filling process to create a
striped appearance. The stripe size is about 6 mm in width and 100
mm in length.
Examples 4-6
[0133] The following examples described in Table 2 are non-limiting
examples of cleansing phase and benefit phase compositions of the
present invention. TABLE-US-00003 TABLE 2 Cleansing Phase and
Benefit phase Compositions Example 4 Example 5 Example 6 Ingredient
wt % wt % wt % I. Cleansing Phase Composition Miracare SLB-365
(from Rhodia) 47.4 47.4 47.4 (Sodium Trideceth Sulfate, Sodium
Lauramphoacetate, Cocamide MEA) Polyquaterium 10 (UCare KG-30M) 0.7
-- -- Jaguar C-17 (from Rhodia) 0.7 Guar Hydroxypropyltrimonium
Chloride -- -- 0.7 (N-Hance 3196 from Aqualon) PEG 90M (Polyox WSR
301 from Dow Chemical) -- -- 0.2 Sodium Chloride 3.5 3.5 3.5
Disodium EDTA 0.05 0.05 0.05 Glydant 0.67 0.67 0.67 Citric Acid 0.4
0.4 0.4 Perfume 2.0 2.0 2.0 Expancel 091 DE 40 d30 (from Expancel,
Inc.) 0.4 0.4 0.4 Water Q.S. Q.S. Q.S. (pH) (6.0) (6.0) (6.0) II.
Benefit phase Composition Petrolatum (Superwhite Protopet from
WITCO) 75 75 75 Bentone Gel MIO (from Rheox) 24.92 -- -- Mineral
Oil (Hydrobrite 1000 PO White MO from -- 23.92 23.92 WITCO) Kraton
G1702 (from Shell) -- 1 -- Claytone HY (from Southern Clay) -- -- 1
Colorona Magenta Cosmetic Pigment (from Rona) 0.08 0.08 0.08
[0134] Prepare the compositions described above by conventional
formulation and mixing techniques. Prepare the cleansing phase
composition by first adding citric acid into water at 1:3 ratio to
form a citric acid premix. Then, add the following ingredients into
the main mixing vessel in the following sequence: water, Miracare
SLB-365, sodium chloride, sodium benzoate, Disodium EDTA, glydant.
Start agitation of the main mixing vessel. In a separate mixing
vessel, disperse polymers (Polyquaterium 10, Jaguar C-17, or
N-Hance 3196) in water at 1:10 ratio and form a polymer premix. Add
the completely dispersed polymer premix into the main mixing vessel
with continuous agitation. Disperse Polyox WSR 301 in waterl and
then add to the main mixing vessel. Then, add the rest of the
water, perfume, and Expancel into the batch. Keep agitation until a
homogenous solution forms.
[0135] Prepare the benefit phase by adding petrolatum into a mixing
vessel. Heat the vessel to 190.degree. F. Then, add mineral oil,
Bentone Gel, Kraton polymer, or Claytone HY with agitation.
[0136] High shear the samples containing Bentone Gel or Claytone.
Add cosmetic pigment and let the vessel cool down with slow
agitation.
[0137] The cleansing and benefit phases are density matched to
within 0.05 g/cm.sup.3. Package both phases into a single container
using conventional toothpaste-tube filler equipment. The sample
stage spins the bottle during filling process to create a striped
appearance. The stripe size is about 6 mm in width and 100 mm in
length.
Examples 7-9
[0138] The following examples described in Table 3 are non-limiting
examples of cleansing phase and benefit phase compositions of the
present invention. TABLE-US-00004 TABLE 3 Cleansing Phase and
Benefit phase Compositions Example 7 Example 8 Example 9 Ingredient
wt % wt % wt % I. Cleansing Phase Composition Miracare SLB-365
(from Rhodia) (Sodium Trideceth 47.4 47.4 47.4 Sulfate, Sodium
Lauramphoacetate, Cocamide MEA) Sodium Chloride 3.5 3.5 3.5
Disodium EDTA 0.05 0.05 0.05 Glydant 0.67 0.67 0.67 Citric Acid 0.4
0.4 0.4 Perfume 2.0 2.0 2.0 Expancel 091 DE40 d30 (from Expancel,
Inc.) 0.4 0.4 0.4 Water Q.S. Q.S. Q.S. (pH) (6.0) (6.0) (6.0) II.
Benefit phase Composition Versagel M500 (Gelled Mineral Oil from
Penreco) 99.92 -- -- Versagel MC1600 (Gelled isoparaffin from
Penreco) -- 99.92 -- Versagel ME500 (Gelled hydrogenated
polyisobutene -- -- 99.92 from Penreco)) Colorona Magenta Cosmetic
Pigment (from Rona) 0.08 0.08 0.08
[0139] The compositions described above can be prepared by
conventional formulation and mixing techniques. Prepare the
cleansing phase composition by first adding citric acid into water
at 1:3 ratio to form a citric acid premix. Then, add the following
ingredients into the main mixing vessel in the following sequence:
water, Miracare SLB-365, sodium chloride, sodium benzoate, Disodium
EDTA, glydant. Start agitation of the main mixing vessel. Then, add
perfume into the batch. Keep agitation until a homogenous solution
forms.
[0140] Prepare the benefit phase by adding Versagel into a mixing
vessel. Heat the vessel to 190.degree. F. Then, add cosmetic
pigment with agitation. Let the vessel cool down with slow
agitation.
[0141] The cleansing and benefit phases are density matched within
0.05g/cm.sup.3. Package both phases into a single container using
conventional toothpaste-tube filler equipment. The sample stage
spins the bottle during the filling process to create a striped
appearance. The stripe size is about 6 mm in width and 100 mm in
length.
[0142] The dimensions and values disclosed herein are not to be
understood as being strictly limited to the exact numerical values
recited. Instead, unless otherwise specified, each such dimension
is intended to mean both the recited value and a functionally
equivalent range surrounding that value. For example, a dimension
disclosed as "40 mm" is intended to mean "about 40 mm."
[0143] All documents cited in the Detailed Description of the
Invention are, in relevant part, incorporated herein by reference;
the citation of any document is not to be construed as an admission
that it is prior art with respect to the present invention.
[0144] While particular embodiments of the present invention have
been illustrated and described, it would be obvious to those
skilled in the art that various other changes and modifications can
be made without departing from the spirit and scope of the
invention. It is therefore intended to cover in the appended claims
all such changes and modifications that are within the scope of
this invention.
* * * * *