U.S. patent application number 12/361457 was filed with the patent office on 2011-04-21 for personal-care article for sequentially dispensing compositions with variable concentrations of hydrophobic benefit materials.
Invention is credited to Jonathan Robert Cetti, Karen Lehnhoff, Christopher Dean Putman, Edward Dewey Smith, III, Lee Thomas Williams, JR..
Application Number | 20110089196 12/361457 |
Document ID | / |
Family ID | 42396331 |
Filed Date | 2011-04-21 |
United States Patent
Application |
20110089196 |
Kind Code |
A1 |
Cetti; Jonathan Robert ; et
al. |
April 21, 2011 |
PERSONAL-CARE ARTICLE FOR SEQUENTIALLY DISPENSING COMPOSITIONS WITH
VARIABLE CONCENTRATIONS OF HYDROPHOBIC BENEFIT MATERIALS
Abstract
The present invention relates to a personal-care article
comprising a package and a personal-care product. The package
comprises at least one chamber, a dispensing orifice, a first zone
proximate to the dispensing orifice, and a second zone distal to
the dispensing orifice. The first zone and second zone are both
located in at least one chamber. The personal-care product
comprises a first personal-care composition substantially disposed
within the first zone and the second personal-care composition
substantially disposed within the second zone. The first
personal-care composition comprises a first concentration of
hydrophobic benefit material. The second personal-care composition
comprises a second concentration of hydrophobic benefit material.
The first concentration of hydrophobic benefit material is
different from the second concentration of hydrophobic benefit
material.
Inventors: |
Cetti; Jonathan Robert;
(Mason, OH) ; Putman; Christopher Dean; (West
Chester, OH) ; Lehnhoff; Karen; (Cincinnati, OH)
; Williams, JR.; Lee Thomas; (West Chester, OH) ;
Smith, III; Edward Dewey; (Mason, OH) |
Family ID: |
42396331 |
Appl. No.: |
12/361457 |
Filed: |
January 28, 2009 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
11881551 |
Jul 27, 2007 |
|
|
|
12361457 |
|
|
|
|
Current U.S.
Class: |
222/132 ;
222/129 |
Current CPC
Class: |
A45D 2200/058 20130101;
A61K 2800/87 20130101; B65D 77/08 20130101; A61Q 19/00 20130101;
A61K 2800/436 20130101; A45D 40/24 20130101; A61K 8/31 20130101;
A61K 8/03 20130101; A45D 34/00 20130101; A61Q 19/10 20130101 |
Class at
Publication: |
222/132 ;
222/129 |
International
Class: |
B65D 83/00 20060101
B65D083/00 |
Claims
1) A personal-care article for dispensing and or applying a
personal-care product comprising: a) a package comprising at least
one chamber, a dispensing orifice, a first zone proximate to said
dispensing orifice, and a second zone distal to said dispensing
orifice, wherein said first zone and said second zone are both
located in said at least one chamber; and b) a personal-care
product comprising a first personal-care composition substantially
disposed within said first zone and a second personal-care
composition substantially disposed within said second zone; wherein
said first composition comprises a first concentration of a
hydrophobic benefit material; wherein said second composition
comprises a second concentration of a hydrophobic benefit material;
and wherein said first concentration is different from said second
concentration.
2) The personal-care article of claim 1, wherein said first
concentration of said hydrophobic benefit agent is greater than
said second concentration of said hydrophobic benefit agent.
3) The personal-care article of claim 1, wherein said second
concentration of said hydrophobic benefit agent is greater than
said first concentration of said hydrophobic benefit agent.
4) The personal-care article of claim 1, wherein said first
concentration of said hydrophobic benefit agent is zero.
5) The personal-care article of claim 1, wherein said second
concentration of said hydrophobic benefit agent is zero.
6) The personal-care article of claim 1, wherein said first zone
comprises from about 10% to about 90%, by volume, of said
package.
7) The personal-care article of claim 1, wherein said first zone
comprises from about 30% to about 70%, by volume of said
package.
8) The personal-care article of claim 1, wherein said first zone
comprises about 50%, by volume of said package.
9) The personal-care article of claim 1, wherein said first
personal-care composition comprises a first concentration of
surfactant and said second personal-care composition comprises a
second concentration of surfactant.
10) The personal-care article of claim 9, wherein said first
concentration of surfactant is greater than said second
concentration of surfactant.
11) The personal-care article of claim 1, wherein said first
personal-care composition comprises a lamellar phase.
12) The personal-care article of claim 1, wherein said second
personal-care composition comprises a lamellar phase.
13) The personal-care article of claim 1, wherein said first zone
is in physical contact with said second zone within said
package.
14) The personal-care article of claim 1, wherein said first
personal-care composition is a distinct hue from said second
personal-care composition.
15) The personal-care article of claim 1, wherein said package
further comprises a third zone medial to said dispensing
orifice.
16) The personal-care article of claim 15, wherein said product
further comprises a third personal-care composition substantially
disposed within said third zone; said third personal-care
composition comprising a third concentration of a hydrophobic
benefit material wherein said third concentration is different from
said first concentration and said second concentration.
17) The personal-care article of claim 15, wherein said first zone,
said second zone, and said third zone comprise an equal percentage,
by volume, of said package.
18) The personal-care article of claim 1, wherein said first
composition further comprises polythethylene beads.
19) The personal-care article of claim 1, wherein said second
composition further comprises titanium dioxide.
20) The personal-care article of claim 1, wherein said second
composition further comprises interference pigment.
Description
CROSS REFERENCE TO RELATED APPLICATION
[0001] This application is a continuation-in-part of U.S.
application Ser. No. 11/881,551, filed Jul. 27, 2007.
FIELD OF THE INVENTION
[0002] The present invention relates to a personal-care article
that provides a personal-care product that comprises at least two
compositions each having a concentration of hydrophobic benefit
material which is noticeably distinct from each other.
BACKGROUND OF THE INVENTION
[0003] Personal-care compositions are well known and widely used
for cleansing and moisturizing skin and hair, delivering actives,
hiding imperfections, to reducing the oiliness/shine, as well as,
providing scent to the shower and/or the skin. The efficacy of
these types of compositions is directly related to their frequency
of use and level of active ingredients. In some cases, a high level
of benefit agent in a personal-care composition will maintain a
benefit to a consumer for several days after a single application.
In this case, a full bottle of the composition with a high level of
benefit agent is not needed because the continued application of
personal-care composition with high level of benefit agent would
not provide additional benefit to the consumer over one or two
single applications. Numerous cosmetic applications require that
the corresponding compositions be used at variable dose of active
ingredients in the course of time. Up until now, it order to carry
out these treatments, the available resources have consisted either
of successive applications of increasing or decreasing active
ingredient percentages in separate containers or multiplying the
applications of compositions with identical active ingredients
percentages in order to obtain the correct does for the necessary
treatment. If a treatment regime contains too many steps or too
many containers, consumers often habituate or tire of the regime of
personal-care compositions over time. When this habituation occurs
consumers often decrease or even or stop use of one personal-care
product despite the benefits gained by the compliant use of the
regime of personal-care products over time. With the space in the
shower or bath being limited, a typical shower or bath does not
have enough space, to place multiple containers of personal-care
compositions so that a consumer can easily switch the use of one
personal-care composition to another personal-care composition with
a different level of benefit agent.
SUMMARY OF THE INVENTION
[0004] The present invention relates to a personal-care article for
providing at least two personal-care compositions. The
personal-care article comprises a package and a personal-care
product. The package comprises at least one chamber, a dispensing
orifice, a first zone proximate to the dispensing orifice and a
second zone distal to the dispensing orifice. The first and second
zones are both located in at least one chamber. The personal-care
product comprises a first personal-care composition substantially
disposed within the first zone and the second personal-care
composition substantially disposed within the second zone. The
first personal-care composition comprises a first concentration of
hydrophobic benefit material. The second personal-care composition
comprises a second concentration of hydrophobic benefit material.
The first concentration of hydrophobic benefit material is
different from the second concentration of hydrophobic benefit
material. Thus, the personal-care article of the present invention
comprises a personal-care product that changes in moisturization
level as it is dispensed from the package which overcomes the
problem of a regime that involves too many steps or too many
containers.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] FIGS. 1A and 1B illustrate a personal-care article with
three zones having horizontal interfaces between the compositions
in each zone.
DETAILED DESCRIPTION OF THE INVENTION
[0006] The term "ambient conditions" as used herein, refers to
surrounding conditions at one (1) atmosphere of pressure, 50%
relative humidity, and 25.degree. C.
[0007] As used herein, "comprising" means that other steps and
other ingredients which do not affect the end result can be added.
This term encompasses the terms "consisting of and "consisting
essentially of." The compositions and methods/processes 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 of the additional or optional
ingredients, components, steps, or limitations described herein
useful in personal-care compositions intended for topical
application to the hair or skin.
[0008] The term "personal-care product," as used herein, may
include, but is not limited to: antiperspirants, deodorants,
lotions (e.g. hand lotion and body lotion), skin-care compositions
(e.g., face and neck lotions, serums, sprays), sunless tanners,
cosmetic compositions (e.g., foundation, concealer, blush,
lipstick, lip gloss), depilatories, shampoos, conditioning
shampoos, hair conditioners, body washes, moisturizing body washes,
shower gels, skin cleansers, cleansing milks, hair and body washes,
in-shower body moisturizers, pet shampoos, shaving preparations,
after-shaves, razor moisturizing/lubricating strips, razor
shave-gel bars, bar soaps, cleansing compositions, feminine-care
products, oral-care products, and baby-care products.
[0009] The term "personal-care composition," as used herein, refers
to compositions intended for topical application to the skin or
hair. Compositions of the present invention may be leave-on
formulations--in which the product is applied topically to the skin
or hair and left on for a period of time, or rinse-off
formulations--in which the product is applied topically to the skin
or hair and then is subsequently rinsed within minutes from the
skin or hair with water, or otherwise wiped off using a substrate
with deposition of a portion of the composition. The personal-care
composition of the present invention is typically extrudable or
dispensible from a package. In other embodiments, the personal-care
article may not comprise a package at all--for instance, in the
case of bar soap. The personal-care compositions of the present
invention can be in the form of solid, semi-solid, liquid,
semi-liquid, cream, lotion or gel compositions intended for topical
application to skin. The term "package" includes any suitable
container for personal-care compositions including but not limited
to a canister, bottle, tottle, tube, jar, non-aerosol pump and
mixtures thereof. As used herein "tottle" refers to a bottle which
rests on the neck or mouth which its contents are filled in and
dispensed from, but it is also the end upon which the bottle is
intended to rest or sit upon for storage by the consumer and/or for
display on the store shelf, as described in the commonly owned U.S.
patent application Ser. No. 11/067443 filed on Feb. 25, 2005 to
McCall, et al, entitled "Multi-phase Personal-Care Compositions,
Process for Making and Providing, and Article of Commerce."
[0010] The term "dispensing orifice," as used herein, refers to any
opening in a package through which product may be dispensed and/or
applied. For example, an antiperspirant package may comprise a
dispensing orifice in the form of an application surface. The
application surface may be an antiperspirant product itself or the
application surface may be a perforated or mesh-like dome through
which antiperspirant product passes.
[0011] The term "stable" as used herein, unless otherwise
specified, refers to a personal-care product that comprise at least
two compositions that maintain at least two "separate" zones with
at least two separate benefit concentrations zones contained within
a package comprising at least one chamber at ambient conditions for
a period of at least about 180 days. By "separate" is meant that
there is substantially no mixing of compositions contained in said
zones, detected by the benefit analysis method, described
hereinafter, prior to dispensing of the composition.
[0012] The term "structured," as used herein means having a
rheology that confers stability on the personal-care composition.
The degree of structure is determined by characteristics determined
by one or more of the following methods the Yield Stress Method, or
the Zero Shear Viscosity Method or by the Ultracentrifugation
Method, all in the Test Methods below. Accordingly, a surfactant
phase of the composition of the present invention is considered
"structured," if the surfactant phase has one or more of the
following properties described below according to the Yield Stress
Method, or the Zero Shear Viscosity Method or by the
Ultracentrifugation Method. A surfactant phase is considered to be
structured, if the phase has one or more of the following
characteristics: [0013] A. a Yield Stress of greater than about 0.1
Pascal (Pa), more preferably greater than about 0.5 Pa, even more
preferably greater than about 1.0 Pa, still more preferably greater
than about 2.0 Pa, still even more preferably greater than about 3
Pa, and even still even more preferably greater than about 5 Pa as
measured by the Yield Stress and Zero Shear Viscosity Method
described hereafter: [0014] B. a Zero Shear Viscosity of at least
about 500 Pascal-seconds (Pa-s), preferably at least about 1,000
Pa-s, more preferably at least about 1,500 Pa-s, even more
preferably at least about 2,000 Pa-s; or [0015] C. a Structured
Domain Volume Ratio as measured by the Ultracentrifugation Method
described hereafter, of greater than about 40%, preferably at least
about 45%, more preferably at least about 50%, more preferably at
least about 55%, more preferably at least about 60%, more
preferably at least about 65%, more preferably at least about 70%,
more preferably at least about 75%, more preferably at least about
80%, even more preferably at least about 85%.
[0016] The term "surfactant component" as used herein means the
total of all anionic, nonionic, amphoteric, zwitterionic and
cationic surfactants in a phase. When calculations are based on the
surfactant component, water and electrolyte are excluded from the
calculations involving the surfactant component, since surfactants
as manufactured typically are diluted and neutralized.
[0017] As used herein the term "zone" is a domain or region within
a package which corresponds to a composition of the personal-care
product. A zone within a package is in direct physical contact with
another zone within a package, such that the compositions
corresponding to the zone are in direct physical contact with one
another. An interface between the zones can be distinct or gradual
or separated by another zone. The amount contained within a zone
can be defined by a percentage of the package volume and a zone
comprises at least 10% of the package volume of a given package,
excluding the volume of the package corresponding to the closure,
as shown in FIGS. 1A and 1B of the present invention.
[0018] All percentages, parts and ratios are based upon the total
weight of the compositions of the present invention, 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. The
term "weight percent" may be denoted as "wt. %" herein. Except
where specific examples of actual measured values are presented,
numerical values referred to herein should be considered to be
qualified by the word "about."
[0019] All molecular weights as used herein are weight average
molecular weights expressed as grams/mole, unless otherwise
specified.
[0020] The present invention relates to a personal-care article
that provides a package comprising a personal-care product. The
personal-care product comprises at least two personal-care
compositions, each composition having a noticeably distinct
hydrophobic benefit material concentration. These distinct
concentrations can be dispensed sequentially from the package. For
example, a package could dispense a high level of hydrophobic
benefit material, followed by a composition with a medium level of
hydrophobic benefit material, followed by a composition with a
lower level of hydrophobic benefit material concentration. Thus,
the personal-care product changes in moisturization level as it is
dispensed from the package which overcomes the problem of a regime
that involves too many steps or too many containers.
[0021] The present invention relates to a personal-care article for
providing at least two personal-care compositions. The
personal-care article comprises a package and a personal-care
product. The package comprises at least one chamber, a dispensing
orifice, a first zone proximate to the dispensing orifice and a
second zone distal to the dispensing orifice. The first zone and
second zone are both located in at least one chamber. The
personal-care product comprises a first personal-care composition
substantially disposed within the first zone and the second
personal-care composition substantially disposed within the second
zone. In one aspect, the first zone is in physical contact with the
second zone within the package. In one aspect, the first
personal-care composition is in physical contact with the second
personal-care composition within the package.
[0022] The personal-care article for dispensing and or applying at
least two personal-care compositions comprises a package that
comprises at least two zones with at least two personal-care
compositions substantially disposed within the respective zones.
The number of zones with a package and thus, the number of
personal-care compositions disposed within the respective zone can
vary in number. For example, the package may have three zones and
three personal-care composition within the respective zones; four
zones and four compositions, five zones and five compositions, and
so on. In one aspect, the personal-care article comprises a third
zone medial to the dispensing orifice. In one aspect, the
personal-care article comprising a third personal-care composition
substantially disposed within the third zone; the third
personal-care composition comprising a third concentration of a
hydrophobic benefit material wherein the third concentration is
different from the first concentration and the second
concentration. In another aspect, the first zone, the second zone
and the third zone comprise an equal percentage, by volume, of the
package.
[0023] In another aspect, each personal-care composition may
comprise a dye, colorant or the like, such that each personal-care
composition is a distinct color or hue. For example, the first
personal-care composition can be a yellow color, the second
personal-care composition can be an orange color and the third
personal-care composition can be a purple color.
[0024] The amount of hydrophobic benefit materials in compositions
are usually formulated, by weight of the composition, at less than
about 55%, less than about 45%, less than about 30%, less than
about 20%, less than about 10%, less than about 5%, less than about
4%, less than about 3%, less than about 2%, less than about 1%.
Each personal-care composition may comprise from about 1.0% to
about 60%, from about 5% to about 60%, from about 10% to about 50%,
from about 20% to about 45%, by weight of the personal-care
composition, of a hydrophobic benefit material. In one aspect of
the personal-care article of the present invention, the first
personal-care composition or the second composition of the present
invention may comprise a concentration of 0% hydrophobic benefit
material.
[0025] The compositions of the present invention can be multi-phase
and comprise one of more phases or one or more of the components
described in the phases below:
[0026] The personal-care composition of the present invention can
comprise a cleansing phase comprising components of the cleansing
phase. The personal-care composition typically comprises from about
1% to about 100%, by weight of the composition; from about 5% to
about 85%; by weight of the composition, from about 10% to 80%, by
weight of the composition; from about 20 to 70%, by weight of the
composition; from about 25% to 60%, by weight of the composition,
from about 30% to about 50%, by weight of the composition, of a
cleansing phase.
[0027] The cleansing phase can comprise a structured domain that is
comprised of a mixture of surfactants. The presence of structured
domain enables the incorporation of high levels of hydrophobic
benefit materials in a separate phase which is not emulsified
within composition. In one aspect, the structured domain in the
composition can be characterized as, or is, an opaque structured
domain. In one aspect, the opaque structured domain can be
characterized as, or is, a lamellar phase. The lamellar phase
produces a lamellar gel network. The lamellar phase can provide
resistance to shear, adequate yield to suspend particles and
droplets and at the same time provides long term stability, since
it is thermodynamically stable. The lamellar phase tends to have a
higher viscosity thus minimizing the need for viscosity
modifiers.
[0028] In one aspect, cleansing phase can comprise a domain that is
comprised of a mixture of surfactants and can be a micellar phase.
A micellar phase is optically isotropic. Micelles are approximately
spherical in shape. Other shapes such as ellipsoids, cylinders, and
bilayers are also possible. In one aspect, the micellar phase can
be structured to enhance viscosity and to suspend particles. This
can be accomplished using viscosity modifiers such as those defined
below as water structurants.
[0029] The cleansing phase comprises a surfactant component which
can be comprised of a mixture of surfactants including lathering
surfactants or a mixture of lathering surfactants. The cleansing
phase comprises surfactants suitable for application to the
mammalian skin or hair which are compatible with water and the
other ingredients of the composition of the present invention.
These surfactants include anionic, nonionic, cationic,
zwitterionic, amphoteric, soap, or combinations thereof.
Preferably, anionic surfactant comprises at least 40% of the
surfactant component. The personal-care composition can comprise
the surfactant component at concentrations ranging from about 2% to
about 40%, from about 4% to about 25%, about 1% to about 21%, about
3 to 15%, by weight of the composition, of the surfactant
component.
[0030] Suitable surfactants are described in McCutcheon's,
Detergents and Emulsifiers, North American edition (1986),
published by allured Publishing Corporation; and McCutcheon's,
Functional Materials, North American Edition (1992); and in U.S.
Pat. No. 3,929,678 issued to Laughlin, et al on Dec. 30, 1975.
[0031] Preferred linear anionic surfactants for use in the
structured surfactant phase of the personal-care composition
include ammonium lauryl sulfate, ammonium laureth sulfate, sodium
lauryl sulfate, sodium laureth sulfate, potassium laureth sulfate,
sodium lauryl sarcosinate, sodium lauroyl sarcosinate, lauryl
sarcosine, cocoyl sarcosine, ammonium cocoyl sulfate, potassium
lauryl sulfate, and combinations thereof.
[0032] Branched anionic surfactants and monomethyl branched anionic
surfactants suitable for the present invention are described in a
commonly owned, patent application published on December 2006 under
U.S. Publication No. 60/680,149 entitled "Structured Multi-phased
Personal-Cleansing Compositions Comprising Branched Anionic
Surfactants" filed on May 12, 2005 by Smith, et al. Branched
anionic surfactants include but are not limited to the following
surfactants: sodium trideceth sulfate, sodium tridecyl sulfate,
sodium C.sub.12-.sub.13 alkyl sulfate, and C.sub.12-.sub.13 pareth
sulfate and sodium C.sub.12-.sub.13 pareth-n sulfate.
[0033] In one aspect of the personal-care compositions of the
present invention may further preferably comprise an amphoteric
surfactant, a zwitterionic surfactant and mixtures thereof. In one
embodiment, the personal-care composition can comprise at least one
amphoteric surfactant.
[0034] Amphoteric surfactant suitable for use in the present
invention 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.
In one aspect, the personal-care composition can comprise an
amphoteric surfactant that is selected from the group consisting of
sodium lauroamphoacetate, sodium cocoamphoactetate, disodium
lauroamphoacetate disodium cocodiamphoacetate, and mixtures
thereof. Moreover, Amphoacetates and diamphoacetates can also be
used.
[0035] Zwitterionic surfactants suitable for use 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. Zwitterionic
surfactants suitable for use in the personal-care composition
include alkyl betaines, including cocoamidopropyl betaine. The
personal-care composition of the present invention is preferably
free of alkyl amines and alkanolamide to ensure mildness of the
composition to the skin.
[0036] An electrolyte can be added per se to the personal-care
composition or it can be formed in situ via the counterions
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 chloride, ammonium chloride, sodium or ammonium sulfate. The
electrolyte is preferably added to the structured surfactant phase
of the composition in the amount of from about 0.1% to about 6%;
from about 1% to about 5%, more preferably from about 2% to about
4%, more preferably from about 3% to about 4%, by weight of the
personal-care composition.
[0037] The first personal-care composition can comprise a first
concentration of surfactant and second personal-care composition
can comprise a second concentration of surfactant. The first
concentration of surfactant can be different from the second
concentration of surfactant. In one aspect, the first personal-care
composition can a first concentration of surfactant that is a
greater that the second concentration of surfactant in the second
personal-care compositions. In one aspect, the first personal-care
composition can have a lower concentration of surfactant than the
second personal-care compositions.
[0038] The personal-care compositions of the present invention
comprise a benefit phase or benefit phase components. The benefit
phase in the present invention is preferably anhydrous and can be
substantially free of water. The benefit phase can be substantially
free or free of surfactant.
[0039] Hydrophobic benefit materials suitable for use in the
present invention preferably have a Vaughan Solubility Parameter of
from about 5 (cal/cm.sup.3).sup.1/2 to about 15
(cal/cm.sup.3).sup.1/2, as defined by Vaughan in Cosmetics and
Toiletries, Vol. 103. The Vaughan Solubility Parameter (VSP) as
used herein is a parameter used to define the solubility of
hydrophobic materials. Vaughan Solubility parameters are well known
in the various chemical and formulation arts and typically have a
range of from 5 to 25. Non-limiting examples of hydrophobic benefit
materials having VSP values ranging from about 5 to about 15
include the following: 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.
[0040] The hydrophobic benefit materials for use in the benefit
phase of the composition have a preferred rheology profile as
defined by Consistency value (k) and Shear Index (n). The term
"Consistency value" 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). The term "Shear Index" or "n" as used herein is
a measure of lipid viscosity and is used in combination with
Consistency value, 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. Consistency value
(k) and Shear Index (n) are more fully described in the Test
Methods below. Preferred Consistency value 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 preferably 0.20-0.4. These
preferred rheological properties are especially useful in providing
the personal-cleansing compositions with improved deposition of
benefit agents on skin.
[0041] The benefit phase can be comprised of the hydrophobic
benefit materials selected from the group consisting of petrolatum,
lanolin, derivatives of lanolin (e.g. lanolin oil, isopropyl
lanolate, acetylated lanolin, acetylated lanolin alcohols, lanolin
alcohol linoleate, lanolin alcohol riconoleate) hydrocarbon oils
(e.g. mineral oil) natural and synthetic waxes (e.g.
micro-crystalline waxes, paraffins, ozokerite, lanolin wax, lanolin
alcohols, lanolin fatty acids, polyethylene, polybutene,
polydecene, pentahydrosqualene) volatile or non-volatile
organosiloxanes and their derivatives (e.g. dimethicones,
cyclomethicones, alkyl siloxanes, polymethylsiloxanes,
methylphenylpolysiloxanes), natural and synthetic triglycerides
(e.g. 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. In one aspect, at least
about 50% by weight of the hydrophobic benefit materials 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 hydrophobic benefit material can be selected from:
isopropyl palmitate, cetyl riconoleate, octyl isononanoate, octyl
palmitate, isocetyl stearate, hydroxylated milk glyceride and
combinations thereof. The benefit phase of the personal-care
composition can be comprised a combination of petrolatum and
mineral oil.
[0042] The personal-care compositions of the present invention can
comprise a structured aqueous phase which can comprise a water
structurant and water. The structured aqueous phase can be
hydrophilic. In one aspect, the structured aqueous phase can be a
hydrophilic, non-lathering gelled water phase. The structured
aqueous phase can comprises less than about 5%; less than about 3%;
less than about 1%, by weight of the structured aqueous phase, of a
surfactant component. In one aspect, the structured aqueous phase
can be is free of lathering surfactants in the composition. The
structured aqueous phase of the present invention can comprise from
about 30% to about 99%, more than about 50%, more than about 60%,
more than about 70%, more than about 80%, by weight of the
structured aqueous phase, of water.
[0043] The structured aqueous phase may comprise water structurant.
The water structurant is selected from the group consisting of
inorganic water structurants (e.g. silicas, polyacrylates,
polyacrylamides, modified starches, crosslinked polymeric gellants,
copolymers) charged polymeric water structurants (e.g.
Acrylates/Vinyl Isodecanoate Crosspolymer (Stabylen 30 from 3V),
Acrylates/C10-30 Alkyl Acrylate Crosspolymer (Pemulen TR1 and TR2),
Carbomers, Ammonium Acryloyldimethyltaurate/VP Copolymer
(Aristoflex AVC from Clariant), Ammonium
Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer
(Aristoflex HMB from Clariant), Acrylates/Ceteth-20 Itaconate
Copolymer (Structure 3001 from National Starch), Polyacrylamide
(Sepigel 305 from SEPPIC), water soluble polymeric structurants
(e.g. cellulose gums and gel, and starches), associative water
structurants (e.g. xanthum gum, gellum gum, pectins, alginates such
as propylene glycol alginate), and mixtures thereof. The structured
aqueous phase can comprise from about 0.1% to about 30%, from about
0.5% to about 20%, from about 0.5% to about 10%, and from about
0.5% to about 5%, by weight of the structured aqueous phase, of a
water structurant. Water structurant for the structured aqueous
phase can have a net cationic charge, net anionic charge, or
neutral charge.
[0044] The structured aqueous phase can have a pH in the range from
about 5 to about 9.5, or in one aspect have a pH of about 7. The
structured aqueous phase of the present compositions can further
comprise optional ingredients such as, pigments, pH regulators
(e.g. triethanolamine), and preservatives.
[0045] While not essential for the purposes of the present
invention, the non-limiting list of optional materials, illustrated
hereinafter are suitable for use in personal-care compositions, and
may be incorporated in certain embodiments, for example to assist
or enhance cleansing performance, for treatment of the skin, or to
modify the aesthetics of the personal-care composition. Optional
materials useful in the products herein are described by their
cosmetic and/or therapeutic benefit or their postulated mode of
action or function. These descriptions are non-limiting and made
for the sake of convenience because it is understood that these
materials can provide more than one benefit, function or operate
via more than one mode of action. The precise nature of these
optional materials, and levels of incorporation thereof, will
depend on the physical form of the composition and the nature of
the cleansing operation for which it is to be used. The amount of
optional materials in compositions are usually formulated, by
weight of the composition, at less than about less than about 6%,
less than about 5%, less than about 4%, less than about 3%, less
than about 2%, less than about 1%, less than about 0.5%, less than
about 0.25%, less than about 0.1%, less than about 0.01%, less than
about 0.005%.
[0046] Optional ingredients, which can be used in the personal-care
compositions of the present invention, can be selected from the
group consisting of thickening agents; low density microspheres
(e.g. Expancel 091 WE40 d24, Akzo Nobel and others described in
commonly owned and assigned U.S. Patent Publication No.
2004/0092415A1 published on May 13, 2004); preservatives;
antimicrobials; fragrances; chelators (e.g. such as those described
in U.S. Pat. No. 5,487,884 issued to Bisset, et al.); sequestrants;
vitamins (e.g. Retinol); vitamin derivatives (e.g. tocophenyl
actetate, niacinamide, panthenol); sunscreens; desquamation actives
(e.g. such as those described in U.S. Pat. Nos. 5,681,852 and
5,652,228 issued to Bisset); anti-wrinkle/ anti-atrophy actives
(e.g. N-acetyl derivatives, thiols, hydroxyl acids, phenol);
anti-oxidants (e.g. ascorbic acid derivatives, tocophenol) skin
soothing agents/skin healing agents (e.g. panthenoic acid
derivatives, aloe vera, allantoin); skin lightening agents (e.g.
kojic acid, arbutin, ascorbic acid derivatives) skin tanning agents
(e.g. dihydroxyacteone); polymeric phase structurant (e.g.
naturally derived polymers, synthetic polymers, crosslinked
polymers, block copolymers, copolymers, hydrophilic polymers,
nonionic polymers, anionic polymers, hydrophobic polymers,
hydrophobically modified polymers, associative polymers, and
oligomers); a liquid crystalline phase inducing structurant (e.g.
trihydroxystearin available from Rheox, Inc. under the trade name
THIXCIN.RTM. R); organic cationic deposition polymer (e.g.
Polyquaternium 10 available from Amerchol Corp. Edison, N.J., USA,
guar hydroxypropyltrimonium chloride available as Jaguar C-17 from
Rhodia Inc., and N-Hance polymer series commercially available from
Aqualon); pH regulators (e.g. triethanolamine); anti-acne
medicaments; essential oils; sensates; pigments; colorants;
pearlescent agents; interference pigments (e.g such as those
disclosed in U.S. Pat. No. 6,395,691 issued to Liang Sheng Tsaur,
U.S. Pat. No. 6,645,511 issued to Aronson, et al., U.S. Pat. No.
6,759,376 issued to Zhang, et al, U.S. Pat. No. 6,780,826 issued to
Zhang, et al.) particles (e.g. talc, kolin, mica, smectite clay,
cellulose powder, polysiloxane, silicas, carbonates, titanium
dioxide, polyethylene beads) hydrophobically modified non-platelet
particles (e.g. hydrophobically modified titanium dioxide and other
materials described in a commonly owned, patent application
published on Aug. 17, 2006 under Publication No. 2006/0182699A by
Taylor, et al.) and mixtures thereof. Other optional ingredients
are most typically those materials approved for use in cosmetics
and that are described in the CTFA Cosmetic Ingredient Handbook,
Second Edition, The Cosmetic, Toiletries, and Fragrance
Association, Inc. 1988, 1992.
Hand and Body Lotion with Asymmetrical Lipid Distribution
Profile
[0047] In some embodiments, the compositions herein are able to
provide improved relief from dry skin, delivering a moisturization
profile that is more intensive during the early consumption period
(for skin that is most dry and damaged), and less intensive during
a later consumption period (where the skin is less dry and damaged
due to prior skin treatment).
[0048] The compositions of the present invention may comprise a
safe and effective amount of a dermatologically acceptable carrier
within which the essential materials and optional other materials
are incorporated to enable the essential materials and optional
components to be delivered to the skin at an appropriate
concentration. The carrier may be solid, semi-solid or liquid.
Preferred carriers are substantially liquid. The type of carrier
utilized in the present invention depends on the type of product
form desired for the composition.
[0049] Preferred carriers comprise an emulsion comprising a
hydrophilic phase and a hydrophobic phase. As is well known to one
skilled in the art, the hydrophilic phase will be dispersed in the
hydrophobic phase, or vice versa, to form respectively hydrophilic
or hydrophobic dispersed and continuous phases, depending on the
composition ingredients. The emulsion may be or comprise (e.g., in
a triple or other multi-phase emulsion) an oil-in-water emulsion or
a water-in-oil emulsion such as a water-in-silicone emulsion.
Emulsions of the present invention may comprise one or more of the
following: hydrophobic components, hydrophilic components,
emulsifiers, surfactants, structuring agents, and thickeners, as
further described in U.S. Patent Publication US2004/0191205.
Test Methods
Benefit Analysis Method:
[0050] This method determines the weight ratio of cleansing
(surfactant) phase to lipid phase in dual phase composition. A
sample of dual-phase composition is mixed and tested using a
moisture analyzer for % moisture. The result is calculated by
dividing the total % moisture in the composition by the % moisture
in the surfactant phase then multiplying that result by 100. The %
benefit agent (lipid) is calculated by subtracting the % surfactant
phase from 100. It is applicable only to dual phase compositions in
which one phase (lipd) contributes no volatiles at the temperature
conditions used in the instrument program.
TABLE-US-00001 Apparatus: Infared or Halogen Moisture Balance (e.g.
Programed according to the operating manual, Mettler-Toledo HR73
Moisture Analyzer) using the following test parameters: Heating
mode: Ramp to 140.degree. C. in 5 minutes Switchoff mode: 3
aluminum drying pans (4 inch .times. 5/16 inch Aluminum drying pans
must be dried and deep) stored in a desiccator prior to use. Dry
the pans in a conventional oven for 1 hour at 130.degree. C. Allow
pans to cool to room temperature before using. Always handle pans
with a clean pair of forceps 1 ml Disposable Syringes Analytical
Balance capable of weighing to 3 decimal places
T-Bar Viscosity Method:
[0051] The viscosity of a composition contained within a zone can
be assessed by the T-Bar Viscosity Method. In the case of testing
from a product package, two zones can be selected from the package
that contains at least two compositions that contain separate
hydrophobic benefit material concentrations. In order to separate
the zones, the product can be frozen at a temperature of at least
-20.degree. C. for a period of at least 24 hours. The zones are
then cut using a cutting implement such as a bandsaw. The cut
portions are collected separately and allowed equilibrate to
ambient conditions.
[0052] The apparatus for T-Bar measurement includes a Brookfield
DV-II+Pro Viscometer with Helipath Accessory; chuck, weight and
closer assembly for T-bar attachment; a T-bar Spindle D, a
personal-computer with Rheocalc software from Brookfield, and a
cable connecting the Brookfield Viscometer to the computer. First,
weigh 80 grams of the first or second composition in a 4-oz glass
jar. Measure the T-bar viscosity by carefully dropping the T-Bar
Spindle to the interior bottom of the jar and set the Helipath
stand to travel in an upward direction. Open the Rheocalc software
and set the following data acquisition parameters: set Speed to 5
rpm, set Time Wait for Torque to 00:01 (1 second), set Loop Start
Count at 100. Start data acquisition and turn on the Helipath stand
to travel upward at a speed of 22 mm/min The T-Bar viscosity "T,"
is the average T-Bar viscosity reading between the 6.sup.th reading
and the 95.sup.th reading (the first five and the last five
readings are not used for the average T-Bar viscosity calculation).
If the viscosity is below the lower limit of the D spindle (30,000
cps), a larger spindle can be used for the T-Bar Viscosity
measurement.
Ultracentrifugation Method:
[0053] The Ultracentrifugation Method is used to determine the
percent of a structured domain or an opaque structured domain that
is present in a multi-phase personal-care composition that
comprises a structured surfactant phase comprising a surfactant
component. The method involves the separation of the composition by
ultracentrifugation into separate but distinguishable layers. The
multi-phase personal-care composition of the present invention can
have multiple distinguishable layers, for example a non-structured
surfactant layer, a structured surfactant layer, and a benefit
layer.
[0054] First, dispense about 4 grams of multi-phase personal-care
composition into Beckman Centrifuge Tube (1.times.60 mm) Next,
place the centrifuge tubes in an Ultracentrifuge (Beckman Model
L8-M or equivalent) and ultracentrifuge using the following
conditions: 50,000 rpm, 18 hours, and 25.degree. C.
[0055] After ultracentrifuging for 18 hours, determine the relative
phase volume by measuring the height of each layer visually using
an Electronic Digital Caliper (within 0.01 mm) First, the total
height is measured as H.sub.a which includes all materials in the
ultracentrifuge tube. Second, the height of the benefit layer is
measured as H.sub.b. Third, the structured surfactant layer is
measured as H.sub.c. The benefit layer is determined by its low
moisture content (less than 10% water as measured by Karl Fischer
Titration). It generally presents at the top of the centrifuge
tube. The total surfactant layer height (H.sub.s) can be calculated
by this equation:
H.sub.s=H.sub.a-H.sub.b
[0056] The structured surfactant layer components may comprise
several layers or a single layer. Upon ultracentrifugation, there
is generally an isotropic layer at the bottom or next to the bottom
of the ultracentrifuge tube. This clear isotropic layer typically
represents the non-structured micellar surfactant layer. The layers
above the isotropic phase generally comprise higher surfactant
concentration with higher ordered structures (such as liquid
crystals). These structured layers are sometimes opaque to naked
eyes, or translucent, or clear. There is generally a distinct phase
boundary between the structured layer and the non-structured
isotropic layer. The physical nature of the structured surfactant
layers can be determined through microscopy under polarized light.
The structured surfactant layers typically exhibit distinctive
texture under polarized light. Another method for characterizing
the structured surfactant layer is to use X-ray diffraction
technique. Structured surfactant layer display multiple lines that
are often associated primarily with the long spacings of the liquid
crystal structure. There may be several structured layers present,
so that H.sub.c is the sum of the individual structured layers. If
a coacervate phase or any type of polymer-surfactant phase is
present, it is considered a structured phase.
[0057] Finally, the structured domain volume ratio is calculated as
follows:
Structured Domain Volume Ratio=H.sub.c/H.sub.s*100%
[0058] If there is no benefit phase present, use the total height
as the surfactant layer height, H.sub.s=H.sub.a.
Yield Stress and Zero Shear Viscosity Method:
[0059] The Yield Stress and Zero Shear Viscosity of a composition
contained within a zone, can be measured either prior to combining
the phases in a composition, or after combining the phases in a
composition by separating the phases by suitable physical
separation means, such as centrifugation, pipetting, cutting away
mechanically, rinsing, filtering, or other separation means. In the
case of testing from a product package, two zones can be selected
from the package that contains at least two compositions that
contain separate hydrophobic benefit material concentrations. In
order to separate the zones, the product can be frozen at a
temperature of at least -20.degree. C. for a period of at least 24
hours. The zones are then cut using a cutting implement such as a
bandsaw. The cut portions are collected separately and allowed
equilibrate to ambient conditions.
[0060] A controlled stress rheometer such as a TA Instruments
AR2000 Rheometer is used to determine the Yield Stress and Zero
Shear Viscosity. The determination is performed at 25.degree. C.
with the 4 cm diameter parallel plate measuring system and a 1 mm
gap. The geometry has a shear stress factor of 79580 m.sup.-3 to
convert torque obtained to stress. Serrated plates can be used to
obtain consistent results when slip occurs.
[0061] First a sample of the composition is obtained and placed in
position on the rheometer base plate, the measurement geometry
(upper plate) moving into position 1 mm above the base plate.
Excess phase at the geometry edge is removed by scraping after
locking the geometry. If the phase comprises particles discernible
to the eye or by feel (beads, e.g.) which are larger than about 150
microns in number average diameter, the gap setting between the
base plate and upper plate is increased to the smaller of 4 mm or
8-fold the diameter of the 95.sup.th volume percentile particle
diameter. If a phase has any particle larger than 5 mm in any
dimension, the particles are removed prior to the measurement.
[0062] The determination is performed via the programmed
application of a continuous shear stress ramp from 0.1 Pa to 1,000
Pa over a time interval of 4 minutes using a logarithmic
progression, i.e., measurement points evenly spaced on a
logarithmic scale. Thirty (30) measurement points per decade of
stress increase are obtained. Stress, strain and viscosity are
recorded. If the measurement result is incomplete, for example if
material flows from the gap, results obtained are evaluated and
incomplete data points excluded. The Yield Stress is determined as
follows. Stress (Pa) and strain (unitless) data are transformed by
taking their logarithms (base 10). Log(stress) is graphed vs.
log(strain) for only the data obtained between a stress of 0.2 Pa
and 2.0 Pa, about 30 points. If the viscosity at a stress of 1 Pa
is less than 500 Pa-sec but greater than 75 Pa-sec, then
log(stress) is graphed vs. log(strain) for only the data between
0.2 Pa and 1.0 Pa, and the following mathematical procedure is
followed. If the viscosity at a stress of 1 Pa is less than 75
Pa-sec, the zero shear viscosity is the median of the 4 highest
viscosity values (i.e., individual points) obtained in the test,
the yield stress is zero, and the following mathematical procedure
is not used. The mathematical procedure is as follows. A straight
line least squares regression is performed on the results using the
logarithmically transformed data in the indicated stress region, an
equation being obtained of the form:
Log(strain)=m*Log(stress)+b (1)
[0063] Using the regression obtained, for each stress value (i.e.,
individual point) in the determination between 0.1 and 1,000 Pa, a
predicted value of log(strain) is obtained using the coefficients m
and b obtained, and the actual stress, using Equation (1). From the
predicted log(strain), a predicted strain at each stress is
obtained by taking the antilog (i.e., 10.sup.x for each x). The
predicted strain is compared to the actual strain at each
measurement point to obtain a % variation at each point, using
Equation (2).
% variation=100*(measured strain-predicted strain)/measured
strain
[0064] The Yield Stress is the first stress (Pa) at which
%variation exceeds 10% and subsequent (higher) stresses result in
even greater variation than 10% due to the onset of flow or
deformation of the structure. The Zero Shear Viscosity is obtained
by taking a first median value of viscosity in Pascal-seconds
(Pa-sec) for viscosity data obtained between and including 0.1 Pa
and the Yield Stress. After taking the first median viscosity, all
viscosity values greater than 5-fold the first median value and
less than 0.2.times. the median value are excluded, and a second
median viscosity value is obtained of the same viscosity data,
excluding the indicated data points. The second median viscosity so
obtained is the Zero Shear Viscosity.
EXAMPLES
Oil-in-Water Moisturising Emulsions:
TABLE-US-00002 [0065] Zone 1 - "HLE" Zone 2 - "LLE" (High Lipid
(Low Lipid INGREDIENTS Emulsion) % w/w Emulsion) % w/w DEIONISED
WATER QS QS DISODIUM EDTA 0.1 0.1 GLYCERINE 7.0 7.0 NIACINAMIDE 2.0
2.0 PANTHENOL 0.5 0.5 PRODEW 400 .sup.1 1.0 1.0 EMULGADE .sup.2 0.2
0.2 ISOHEXADECANE 6.0 6.0 ETHYL PARABEN 0.15 0.15 COCONUT OIL 0.2
0.2 FRACTIONATED PROPYL PARABEN 0.07 0.07 STEARIC ACID 0.1 0.1
PEG-100 STEARATE 0.1 0.1 STEARYL ALCOHOL 0.61 0.61 CETYL ALCOHOL
0.49 0.49 BEHENYL ALCOHOL 0.40 0.40 ISOPROPYL ISOSTEARATE 1.5 1.5
DL-.alpha. TOCOPHEROL 0.25 0.25 ACETATE PETROLATUM 3.0 1.5 SEPIGEL
305 .sup.3 2.0 2.0 SODIUM HYDROXIDE 0.011 0.011 MICROTHENE FN510
.sup.4 0.2 0.2 BENZYL ALCOHOL 0.25 0.25 DC 1503 .sup.5 1.5 1.5
PERFUME 0.3 0.3 SILVER PEARL .sup.6 0.3 0.3 GOLD PEARL .sup.6 0.2
0.2 .sup.1 Prodew 400: Supplied by Ajinomoto, Stubbenhuk 3,
D-20459, Hamburg, Germany. .sup.2 Emulgade: Supplied by Cognis
Deutchland GmbH, Paul-Thomas Strasse 56, D-40551 Dusseldorf,
Germany. .sup.3 Sepigel 305: Supplied by Seppic, 75 Quai D'Orsay,
Paris .sup.4 Microthene: Supplied by Equistar Chemicals, 1221
McKinney Street, Suite 700, Houston, TX 77252-2583 .sup.5 DC 1503:
Supplied by Dow Coming, Kings Court, 185 Kinds Rd, Reading, Berks,
RGI 4EX .sup.6 Silver and Gold Prestige pearls: Supplied by Eckart
Gmbh and Co., Kaiserstrasse 30, 90763 Fuerth, Germany.
[0066] The compositions are made as follows:
[0067] A water phase is prepared by admixing all water soluble
ingredients, except sodium hydroxide and Prodew 400, in water and
heating to about 80.degree. C. A second premix is prepared by
admixing of the oil soluble ingredients except the silicone oil
(DC1503) and heating also to around 80.degree. C. The oil phase is
added to the water phase and sheared to form an emulsion.
[0068] The emulsion is cooled to 60.degree. C. and the polymeric
thickener (Sepigel 305) is then added. Sodium hydroxide solution is
then added to neutralize to pH 6-7.5, except for examples where
sunscreens are included. At 45-50.degree. C. the benzyl alcohol,
Prodew, DC1503, and particles (mica pearls) are added and the
resulting product is sheared to ensure particle dispersion,
de-agglomeration and homogeneity. The composition can then be
cooled to 40.degree. C. and perfume can be added. The composition
can then be prepared for packaging.
[0069] The personal care product can be prepared by any suitable
means. For example, filling an empty product container with the
multi-zone personal care compositions can comprise using a
dispensing means to transfer a predetermined amount (e.g., about
70% of the target container volume) of the "LLE" composition from
the above example into the empty product container, followed by a
transfer of the "HLE" composition from the above example to fill
the remainder of the target container.
Further Examples
[0070] The following example described in Table 1 shows
non-limiting examples of the articles containing multi-phase
composition with variant level of hydrophobic benefit materials
throughout the bottle of the present invention and a comparative
example that does not have a variant level of hydrophobic benefit
materials. Refer to FIGS. 1A and 1B which defines the zones
described below.
TABLE-US-00003 TABLE 1 Examples of the Present Invention and
Comparative Example Examples of the Present Invention Comparative A
B Example Structured Surfactant Phase Composition Sodium
Lauroamphoacetate 4.9 4.9 4.9 (Cognis Chemical Corp.,) Sodium
Trideceth Sulfate 8.4 8.4 8.4 (sulfated from Iconol TDA-3 (BASF
Corp.) to >95% sulfate) Sodium Lauryl Sulfate 8.4 8.4 8.4
Trideceth-3 2.0 2.0 2.0 (Iconal TDA-3 from BASF Corp.) Sodium
Chloride 4.75 4.75 4.75 Guar hydroxypropyltrimonium chloride 0.6
0.6 0.6 (N-Hance 3196 Polymer) Polyethyleneoxide 0.15 0.15 0.15
(Polyox WSR301) Xanthan gum (Keltrol 1000, Kelco Corp.) 0.2 0.2 0.2
Hollow microspheres (Expancel 091 WE40 0.36 0.3 0.3 d24, Akzo
Nobel) Methyl chloro isothiazolinone and methyl 0.0005 0.0005
0.0005 isothiazolinone (Kathon CG, Rohm & Haas) EDTA
(Dissolvine NA 2x) 0.15 0.15 0.15 Sodium Benzoate 0.2 0.2 0.2
Citric Acid, titrate pH = 5.7 .+-. 0.2 pH = 5.7 .+-. 0.2 pH = 5.7
.+-. 0.2 Perfume 1.3 1.3 1.3 Water Q.S. Q.S. Q.S. Benefit Phase
Composition Petrolatum 70 70 70 (from Quidesa, Mexico) Hydrobrite
1000 White Mineral Oil(from 30 30 30 WITCO, USA) Cosmetic Pigment,
Red 7 Ca Lake 0.01 0.01 0.01 Surfactant Phase to Benefit Phase
Ratio (by 65:35 55:45 55:45 weight): Zone A Surfactant Phase to
Benefit Phase Ratio (by 50:50 65:35 55:45 weight): Zone B
Surfactant Phase to Benefit Phase Ratio (by 60:40 75:25 55:45
weight): Zone C
[0071] The compositions described above can be prepared by
conventional formulation and mixing techniques. Prepare the
structured surfactant phase composition by first adding citric acid
into water at 1:3 ratios to form a citric acid premix. Prepare a
polymer premix by adding Polyox WSR301 and Xanthan Gum into
Trideceth-3 (Example A) or Isosteareth-2 (Example B and Comparative
Example). Then, add the following ingredients into the main mixing
vessel in the following sequence with agitation: water, N-Hance
polymer, Expancel, sodium lauroamphoacetate, sodium trideceth
sulfate, sodium sodium lauroamphoacetate, sodium lauryl sulfate,
sodium chloride, sodium benzoate, and Disodium EDTA. Add citric
acid premix to adjust pH to 5.7.+-.0.2. Add the polymer premix into
the main mixing vessel with continuous agitation. Add perfume while
continuing to agitate until homogeneous.
[0072] Prepare the benefit phase composition by first adding
petrolatum into a mixing vessel. Heat the vessel to 180.degree. F.
(82.2.degree. C.). Then, add Hydrobrite 1000 White mineral oil and
cosmetic pigment (Example A) with agitation. Let the vessel cool
down with slow agitation to about 110.degree. F. (43.3.degree. C.)
and transfer the lipid to a container to cool down to ambient
overnight.
[0073] A visually distinct multiphase composition of the present
invention can be prepared by melting the benefit phase and
combining at a specified ratio with a surfactant phase of the
present invention in a transparent package while the package is
rotated. A multiphase composition of the present invention can also
be prepared by optionally melting the benefit phase and combining
with a surfactant phase of the present invention in an agitated
tank or using agitation from a static mixer to create a dispersion
of one phase in the other, then filling the composition into a
package.
Filling the Empty Product Container to Form a Container of
Multiphase Composition
[0074] The multiphase personal-care composition can be prepared by
any suitable means. For example, filling the empty product
container with the multiphase personal-care composition can
comprise transferring predetermined amounts of the different phases
through at least one dispensing means into an empty product
container. Additionally, the multiphase personal-care compositions
can be prepared by the method and apparatus as disclosed in U.S.
Pat. No. 6,213,166 issued to Thibiant, et al. on Apr. 10, 2001. The
method and apparatus allows two or more compositions to be filled
with a spiral configuration into a single container. The method
requires that at least two nozzles be employed to fill the
container. The container is placed on a moving stage and spun as
the composition is introduced into the container.
[0075] Alternatively, it is effective to combine at least two
phases by first placing the separate compositions in separate
storage tanks having a pump and a hose attached. The phases are
then pumped in predetermined amounts into a single combining
section. Next, the phases are moved from the combining sections
into a blending section and the phases are mixed in the blending
section. The next step involves pumping the product that was mixed
in the blending section via a hose into a single nozzle, then
placing the nozzle into a container and filing the container with
the resulting product such that the single resulting product
exhibits a visually distinct non-random pattern of the phases.
[0076] The shape and size of the particular product container used
will dictate the rate of filling, rotation of the bottle, frequency
of rotation of the bottle, and movement of the bottle during
filling, as these factors can have a direct impact on the shape,
size, and overall appearance of the pattern in the multiphase
composition. The starting position of the bottle (proximity to the
multiphase dispenser, as well as relative position when initially
being filled), also affect the appearance of the pattern in the
multiphase composition.
[0077] Example A and Example C from Table 1 were analyzed according
to the benefit analysis method. Shown in Table 2 and 3 are the
results. [0078] % Lipid Intended represents the intended % Lipid by
weight in the composition. [0079] % Lipid Dispensed: 10 g samples
were dispensed from the tottle in a 20 ml vial, and mixed with a
spatula until blended. Sample numbers 1, 12, and 25 were analyzed
according to the benefit analysis method representing Zone A
(1.sup.st dispensing), Zone B (12.sup.th dispensing) and Zone C
(25.sup.th dispensing) of the tottle as defined in FIGS. 1A and 1B.
[0080] % Lipid Sectioned: The tottle filled with the composition
was frozen at -29.degree. C. for 24 hours. The three zones as
defined in FIGS. 1A and 1B were cut using a bandsaw, and the
compositions contained within the cut portions were collected in a
8 oz. jar and allowed to equilibrate to ambient conditions. Once
the samples were equilibrated, they were mixed with a spatula until
blended. The portions were then analyzed according to the benefit
analysis method.
TABLE-US-00004 [0080] TABLE 2 Example A from Table 1 - % Lipid
Results of a composition with varying benefit agent % Lipid % Lipid
% Lipid Bottle Position Intended Sectioned Dispensed Zone A
(Containing 1st 35.00 43.64 37.80 dispensing) Zone B (Containing
12th 50.00 49.61 50.80 dispensing) Zone C (Containing 25th 40.00
39.23 40.01 dispensing)
TABLE-US-00005 TABLE 3 Example C from Table 1 - % Lipid Results of
a comparative composition with the same level of benefit agent
throughout % Lipid % Lipid % Lipid Bottle Position Intended
Sectioned Dispensed Zone A (Containing 1st 50.00 51.08 52.70
dispensing) Zone B (Containing 12th 50.00 53.06 53.78 dispensing)
Zone C (Containing 25th 50.00 55.42 53.65 dispensing)
[0081] The inventors were able to conclude from the data provided
in table 2 and table 3 that a bottle can be filled with a variant
level of hydrophobic benefit materials. Furthermore, the inventors
were able to conclude from the data provided in table 2 and table
3, that the product dispensed can deliver approximately the same
level of hydrophobic benefit materials as the actual level
sectioned from the different zones of the bottle.
[0082] Although the preceding description and examples are
generally tailored to liquid personal-care products, a person
skilled in the art would know how to make other personal-care
products--e.g. solid, semi-solid, semi-liquid, cream, lotion,
gel--comprising at least two compositions each having a
concentration of hydrophobic benefit material which is noticeably
distinct from each other.
[0083] 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."
[0084] Every document cited herein, including any cross referenced
or related patent or application, is hereby incorporated herein by
reference in its entirety unless expressly excluded or otherwise
limited. The citation of any document is not an admission that it
is prior art with respect to any invention disclosed or claimed
herein or that it alone, or in any combination with any other
reference or references, teaches, suggests or discloses any such
invention. Further, to the extent that any meaning or definition of
a term in this document conflicts with any meaning or definition of
the same term in a document incorporated by reference, the meaning
or definition assigned to that term in this document shall
govern.
[0085] 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.
* * * * *