U.S. patent application number 10/178576 was filed with the patent office on 2003-12-25 for cool and dry soft solid antiperspirant.
Invention is credited to Chopra, Suman, Guenin, Eric, Hall-Puzio, Patricia, Mattai, Jairajh, Miano, Rosemary.
Application Number | 20030235545 10/178576 |
Document ID | / |
Family ID | 29734721 |
Filed Date | 2003-12-25 |
United States Patent
Application |
20030235545 |
Kind Code |
A1 |
Guenin, Eric ; et
al. |
December 25, 2003 |
Cool and dry soft solid antiperspirant
Abstract
A stable, high efficacy, low residue surfactant-free, soft solid
cosmetic composition (especially an antiperspirant and/or
deodorant) comprising: (a) 40-75 weight % of a volatile silicone;
(b) 0.5-20 weight % of a non-emulsifying silicone elastomer; (c)
0.1-10 weight % of a of a superabsorbent powder with little or no
tack upon wetting; (d) 0.01-0.5 weight % of a cooling agent
selected from the group consisting of L-menthol; menthyl lactate;
menthone glycerine; menthone glycerin acetal; (-)-isopulegol,
N-ethyl-5-methyl-2-(1-methylethyl)-cyclohexanecarboxamide- ;
N-ethyl-p-menthane-3-carboxzamide;
4-methyl-3-(1-pyrrolidinyl)-2[5H]-fur- anone;
N,2,3-trimethyl-2-isopropylbutanamide; menthoxypropanediol;
methanediol; and vanillyl butyl ether; (e) 0-20 weight % of an
emollient or a mixture of two or more emollients; (f) 0-30 weight %
of an antiperspirant active based on an anhydrous, buffer-free
antiperspirant active; (g) 0-8 weight % of polyethylene beads
having a particle size in the range of 5-40 microns and a density
in the range of 0.91-0.98 g/cm.sup.3; (h) 0-5 weight % fragrance;
0) 0-5 weight % of an antimicrobial agent; wherein the ratio of
cooling agent to superabsorbent polymer is in the range of
1:50-1:2.
Inventors: |
Guenin, Eric; (Pennington,
NJ) ; Mattai, Jairajh; (Piscataway, NJ) ;
Chopra, Suman; (Dayton, NJ) ; Hall-Puzio,
Patricia; (Succasunna, NJ) ; Miano, Rosemary;
(Martinsville, NJ) |
Correspondence
Address: |
COLGATE-PALMOLIVE COMPANY
909 River Road
P.O. Box 1343
Piscataway
NJ
08855-1343
US
|
Family ID: |
29734721 |
Appl. No.: |
10/178576 |
Filed: |
June 24, 2002 |
Current U.S.
Class: |
424/65 ;
424/66 |
Current CPC
Class: |
A61K 2800/33 20130101;
A61K 8/891 20130101; A61K 2800/244 20130101; A61K 8/732 20130101;
A61Q 15/00 20130101; A61K 2800/54 20130101 |
Class at
Publication: |
424/65 ;
424/66 |
International
Class: |
A61K 007/32; A61K
007/34 |
Claims
We claim:
1. A stable, surfactant-free, soft solid cosmetic composition
comprising: (a) 40-75 weight % of a volatile silicone; (b) 0.5-20
weight % of a non-emulsifying silicone elastomer (on a solids
basis); (c) 0.1-10 weight % of a of a superabsorbent powder with
little or no tack upon wetting; (d) 0.01-0.5 weight % of a cooling
agent selected from the group consisting of L-menthol; menthyl
lactate; menthone glycerine; menthone glycerin acetal;
(-)-isopulegol, N-ethyl-5-methyl-2-(1-methylethyl)-
cyclohexanecarboxamide; N-ethyl-p-menthane-3-carboxzamide;
4-methyl-3-(1-pyrrolidinyl)-2[5H]-furanone;
N,2,3-trimethyl-2-isopropylbu- tanamide; menthoxypropanediol;
methanediol; and vanillyl butyl ether; (e) 0-20 weight % of an
emollient or a mixture of two or more emollients; (f) 0-30 weight %
of an antiperspirant active based on an anhydrous, buffer-free
antiperspirant active; (g) 0-8 weight % of polyethylene beads
having a particle size in the range of 5-40 microns and a density
in the range of 0.91-0.98 g/cm.sup.3; (h) 0-5 weight % fragrance;
and (i) 0-5 weight % of an antimicrobial agent; wherein the ratio
of cooling agent to superabsorbent polymer is in the range of
1:50-1:2.
2. A cosmetic composition as claimed in claim 1 which comprises
10-25 weight percent of the antiperspirant salt.
3. A cosmetic composition as claimed in claim 2 wherein the
antiperspirant salt has a low metal to chloride ratio in the range
of 0.9-1.2:1.
4. A cosmetic composition as claimed in claim 1 which comprises 2-8
weight % of the polyethylene beads.
5. A cosmetic composition as claimed in claim 1 which comprises
1-10 weight % of the emollient.
6. A cosmetic composition as claimed in claim 1 which comprises
1-15 weight % (on a solids basis) of a non-emulsifying silicone
elastomer.
7. A cosmetic composition as claimed in claim 1 which comprises
46-53 weight % of a volatile silicone.
8. A cosmetic composition as claimed in claim 1 wherein the water
lock superabsorbent polymer is a starch graft homopolymers and
copolymers of poly(2-propenamide-co-2-propenioic acid) sodium salt.
Description
FIELD OF THE INVENTION
[0001] This invention relates to antiperspirant soft solid products
that provide superior cool and dry feeling in the underarm area
even under stressful conditions. A related case is being filed on
the same day as this case (Attorney docket number IR 6779), Serial
Number not yet accorded.
BACKGROUND OF THE INVENTION
[0002] Soft solid products are described in U.S. Ser. No.
09/712,378, filed Nov. 14, 2000, entitled "Stable and Efficacious
Soft Solid Products". The use of water absorbent materials is
described in U.S. Ser. No. 09/971,978, filed Oct. 5, 2001, entitled
Underarm Gel Products With Water Lock Component.
[0003] A number of formulations have been used that include some
type of cooling agent such as menthol or mixtures of menthol with
other ingredients. WO 00/42983 to Johnson & Johnson Consumer
France describes a freshening cosmetic comprising 0.01-2 weight %
menthol and 0.1-10 weight % menthyl lactate in a 1/1 to 1/10
ratio.
[0004] The cooling sensation is intensified by the presence of an
aqueous phase or air flow. Thus, the presence of sweat in the
underarm area may increase the cooling sensation to undesirable
levels of coolness, and it has been a problem to control the type
and amount of cooling in the underarm environment. It is an object
of the present invention to create a composition that provides a
controlled coolness in the underarm area so as to give preferred
aesthetics.
SUMMARY OF THE INVENTION
[0005] The incorporation of cooling agents such as L-menthol;
menthyl lactate; menthone glycerine; menthone glycerin acetal;
(-)-isopulegol,
N-ethyl-5-methyl-2-(1-methylethyl)-cyclohexanecarboxamide;
N-ethyl-p-menthane-3-carboxzamide;
4-methyl-3-(1-pyrrolidinyl)-2[5H]-fura- none;
N,2,3-trimethyl-2-isopropylbutanamide (also known as
2-isopropyl-N,2,3-trimethylbutyramide); menthoxypropanediol;
methanediol; vanillyl butyl ether; in an underarm product in
combination with a selected superabsorbent material provides a
superior product that balances a cooling effect with a dry
sensation to give a constant dry cool perception in the underarm
area over an extended period of time. The superabsorbent material
in powder form acts to minimize the perception of wetness and acts
as a water/liquid reservoir for the activation of the cooling
agent. Since the selected cooling agents are activated by the
presence of water, it is important to control the ratios of cooling
agent and superabsorbent powder to achieve the desired effect.
[0006] It has been found that an improved, surfactant-free, soft
solid cosmetic product may be made as a suspension formed with:
[0007] (a) a superabsorbent polymer;
[0008] (b) a selected cooling agent;
[0009] (c) a non-emulsifying elastomer;
[0010] (d) a volatile silicone; and optionally one or more of
[0011] (e) an emollient (which may also be a mixture of two or more
emollients and which may include a non-volatile silicone);
[0012] (f) an effective amount of an antiperspirant active material
to cause an antiperspirant and/or a deodorant effect; and
[0013] (g) polyethylene beads having a density in the range of
0.91-0.98 grams/cm.sup.3 and a particle size in the range of 5-40
microns, wherein the polyethylene beads are used in an amount of at
least 2% by weight based on the total weight of the
composition.
[0014] The soft solid antiperspirant and/or deodorant product of
this invention is an opaque product which leaves little or no white
residue when applied and which exhibits improved efficacy and
stability as compared to other formulations with different types of
elastomers.
DETAILED DESCRIPTION OF THE INVENTION
[0015] This invention comprises an anhydrous, surfactant-free
composition (no more than 1 weight % of added water (excluding any
waters of hydration) and no more than 1% of any material that
functions as a surfactant. The stable, high efficacy, low residue
cosmetic compositions of this invention are made by combining:
[0016] (a) 40-75 weight % (particularly 45-60%, and, more
particularly, 46-53%) of a volatile silicone (especially a D5
cyclomethicone);
[0017] (b) 0.5-20 weight % (on a solids basis) (particularly 1-15%
and, more particularly, 1-10%) of a non-emulsifying elastomer (also
called cyclomethicone (and) dimethicone crosspolymer composition)
as described below;
[0018] (c) 0.1-10 weight % of a of a superabsorbent powder with
little or no tack upon wetting such as, for example, a water lock
superabsorbent polymer selected from the group consisting of starch
graft homopolymers and copolymers of
poly(2-propenamide-co-2-propenioic acid) sodium salt (such as A 180
from Grain Processing Corp., Muscatine, Iowa);
[0019] (d) 0.01-0.5 weight % of a cooling agent selected from the
group consisting of L-menthol; menthyl lactate; menthone glycerine;
menthone glycerin acetal; (-)-isopulegol,
N-ethyl-5-methyl-2-(1-methylethyl)-cyclo- hexanecarboxamide;
N-ethyl-p-menthane-3-carboxzamide;
4-methyl-3-(1-pyrrolidinyl)-2[5H]-furanone;
N,2,3-trimethyl-2-isopropylbu- tanamide (also known as
2-isopropyl-N,2,3-trimethylbutyramide); menthoxypropanediol;
methanediol; vanillyl butyl ether; (particularly L-menthol and
menthyl lactate);
[0020] (e) 0-20 weight % (particularly 1-15 weight % and more
particularly 1-10 weight %) of an emollient or a mixture of two or
more emollients;
[0021] (f) 0-30 weight % (particularly 0.1-30 weight %, more
particularly 10-25 weight % to get an antiperspirant effect) of an
antiperspirant active based on an anhydrous, buffer-free
antiperspirant active;
[0022] (g) 0-8 weight % (particularly 2-8 weight %) of polyethylene
beads having a particle size in the range of 5-40 microns and a
density in the range of 0.91-0.98 g/cm.sup.3;
[0023] (h) 0-5 weight % (particularly 0.1-5 weight %) fragrance;
and
[0024] (i) 0-5 weight % antimicrobial agent;
[0025] wherein the ratio of cooling agent to superabsorbent polymer
is in the range of 1:50-1:2, more particularly in the range of
1:10-1:2.
[0026] It should be noted that the ratio of cooling agent to
superabsorbent is an important feature of this invention. It is a
cooling moderator that allows sufficient water to be released to
activate the cooling agent while maintaining sufficient dryness to
prevent the cooling agent from feeling too wet.
[0027] The compositions of the invention may be made in the form of
soft solids.
[0028] Emollients are a known class of materials in this art,
imparting a soothing effect to the skin. These are ingredients
which help to maintain the soft, smooth, and pliable appearance of
the skin. Emollients are also known to reduce whitening on the skin
and/or improve aesthetics. Examples of chemical classes from which
suitable emollients can be found include:
[0029] (a) fats and oils which are the glyceryl esters of fatty
acids, or triglycerides, normally found in animal and plant
tissues, including those which have been hydrogenated to reduce or
eliminate unsaturation. Also included are synthetically prepared
esters of glycerin and fatty acids. Isolated and purified fatty
acids can be esterified with glycerin to yield mono-, di-, and
triglycerides. These are relatively pure fats which differ only
slightly from the fats and oils found in nature. The general
structure may be represented by Formula III: 1
[0030] wherein each of R.sup.1, R.sup.2, and R.sup.3 may be the
same or different and have a carbon chain length (saturated or
unsaturated) of 7 to 30. Specific examples include peanut oil,
sesame oil, avocado oil, coconut, cocoa butter, almond oil,
safflower oil, corn oil, cotton seed oil, castor oil, hydrogenated
castor oil, olive oil, jojoba oil, cod liver oil, palm oil, soybean
oil, wheat germ oil, linseed oil, and sunflower seed oil;
[0031] (b) hydrocarbons which are a group of compounds containing
only carbon and hydrogen. These are derived from petrochemicals.
Their structures can vary widely and include aliphatic, alicyclic
and aromatic compounds. Specific examples include paraffin,
petrolatum, hydrogenated polyisobutene, and mineral oil.
[0032] (c) esters which chemically, are the covalent compounds
formed between acids and alcohols. Esters can be formed from almost
all acids (carboxylic and inorganic) and any alcohol. Esters here
are derived from carboxylic acids and an alcohol. The general
structure would be R.sup.4COOR.sup.5. The chain length for R.sup.4
and R.sup.5 can vary from 7 to 30 and can be saturated or
unsaturated, straight chained or branched. Specific examples
include isopropyl myristate, isopropyl palmitate, isopropyl
stearate, isopropyl isostearate, butyl stearate, octyl stearate,
hexyl laurate, cetyl stearate, diisopropyl adipate, isodecyl
oleate, diisopropyl sebacate, isostearyl lactate, C.sub.12-15 alkyl
benzoates, myreth-3 myristate, dioctyl malate, neopentyl glycol
diheptanoate, neopentyl glycol dioctanoate, dipropylene glycol
dibenzoate, C.sub.12-15 alcohols lactate, isohexyl decanoate,
isohexyl caprate, diethylene glycol dioctanoate, octyl
isononanoate, isodecyl octanoate, diethylene glycol diisononanoate,
isononyl isononanoate, isostearyl isostearate, behenyl behenate,
C.sub.12-15 alkyl fumarate, laureth-2 benzoate, propylene glycol
isoceteth-3 acetate, propylene glycol ceteth-3 acetate,
octyldodecyl myristate, cetyl ricinoleate, myristyl myristate.
[0033] (d) saturated and unsaturated fatty acids which are the
carboxylic acids obtained by hydrolysis of animal or vegetable fats
and oils. These have general structure R.sup.6COOH with the R.sup.6
group having a carbon chain length between 7 and 30, straight chain
or branched. Specific examples include lauric, myristic, palmitic,
stearic, oleic, linoleic and behenic acid.
[0034] (e) saturated and unsaturated fatty alcohols (including
guerbet alcohols) with general structure R.sup.7OH where R.sup.7
can be straight or branched and have carbon length of 7 to 30.
Specific examples include lauryl, myristyl, cetyl, isocetyl,
stearyl, isostearyl, oleyl, ricinoleyl and erucyl alcohol;
[0035] (f) lanolin and its derivatives which are a complex
esterified mixture of high molecular weight esters of
(hydroxylated) fatty acids with aliphatic and alicyclic alcohols
and sterols. General structures would include
R.sup.8CH.sub.2--(OCH.sub.2CH.sub.2).sub.nOH where
R.sup.8represents the fatty groups derived from lanolin and n=5 to
75 or R.sup.9CO--(OCH.sub.2CH.sub.2).sub.nOH where R.sup.9CO--
represents the fatty acids derived from lanolin and n=5 to 100.
Specific examples include lanolin, lanolin oil, lanolin wax,
lanolin alcohols, lanolin fatty acids, isopropyl lanolate,
ethoxylated lanolin and acetylated lanolin alcohols.
[0036] (g) alkoxylated alcohols wherein the alcohol portion is
selected from aliphatic alcohols having 2-18 and more particularly
4-18 carbons, and the alkylene portion is selected from the group
consisting of ethylene oxide, and propylene oxide having a number
of alkylene oxide units from 2-53 and, more particularly, from
2-15. Specific examples include PPG-14 butyl ether and PPG-53 butyl
ether.
[0037] (h) silicones and silanes the linear organo-substituted
polysiloxanes which are polymers of silicon/oxygen with general
structure:
[0038] (1)
(R.sup.10).sub.3SiO(Si(R.sup.11).sub.2O).sub.xSi(R.sup.12).sub.- 3
where R.sup.10, R.sup.11 and R.sup.12 can be the same or different
and are each independently selected from the group consisting of
phenyl and C1-C60 alkyl;
[0039] (2)
HO(R.sup.14).sub.2SiO(Si(R.sup.15).sub.2O).sub.xSi(R.sup.16).su-
b.2OH, where R.sup.14, R.sup.15 and R.sup.16 can be the same or
different and are each independently selected from the group
consisting of phenyl and C1-C60 alkyl; or
[0040] (3) organo substituted silicon compounds of formula
R.sup.17Si(R.sup.18).sub.2OSiR.sup.19.sub.3 which are not polymeric
where R.sup.17, R.sup.18 and R.sup.19 can be the same or different
and are each independently selected from the group consisting of
phenyl and C1-C60 alkyl optionally with one or both of the terminal
R groups also containing an hydroxyl group. Specific examples
include dimethicone, dimethiconol behenate, C.sub.30-45 alkyl
methicone, stearoxytrimethylsilane, phenyl trimethicone and stearyl
dimethicone.
[0041] (i) mixtures and blends of two or more of the foregoing.
[0042] Emollients of special interest include C12-15 alkyl benzoate
(FINSOLV TN from Finetex Inc., Elmwood Park, N.J.), isopropyl
myristate; and neopentyl glycol diheptanoate.
[0043] The emollient or emollient mixture or blend thereof
incorporated in compositions according to the present invention
can, illustratively, be included in amounts of 0.1-20 %, preferably
1-15 %, more preferably 1-10 %, by weight, of the total weight of
the composition.
[0044] The elastomer is a non-emulsifying polysiloxane that does
not contain any appreciable amount of polyoxyalkylenes, for
example, polyoxyethylenes, and may be selected from the group
consisting of:
[0045] (a) a cross-linked or partially cross-linked cyclomethicone
(and) dimethicone crosspolymer (for example, DC 9040 or DC 9045
from Dow Corning Corp., Midland, Mich.);
[0046] (b) a cross-linked or partially cross-linked
dimethicone/vinyldimethicone crosspolymer (for example, KSG-15 or
USG-103 from Shin-Etsu Silicones of America, Akron Ohio);
[0047] (c) a cross-linked or partially cross-linked cyclomethicone
(and) vinyldimethicone/methicone crosspolymer (for example, GE 1229
from General Electric Silicones, Waterford, N.Y.).
[0048] One particular type of elastomer is described in U.S. Pat.
No. 5,654,362, incorporated by reference to the extent it defines
non-emulsifying elastomers. These elastomers are prepared by a
crosslinking reaction between (a) .ident.Si--H containing
polysiloxanes and (b) an alpha, omega-diene in the presence of a
platinum catalyst and (c) a low molecular weight linear or cyclic
polysiloxane. The elastomer can be swollen with the low molecular
weight polysiloxane under a shear force. The .ident.Si--H
containing polysiloxane of part (a) is represented by compounds of
formula (R.sup.13).sub.3SiO(R.sup.14.sub.2SiO-
).sub.a(R.sup.15HSiO).sub.bSi(R.sup.13).sub.3, designated herein as
type A.sup.1, and compounds of the formula
H(R.sup.13).sub.2SiO(R.sup.14.sub.2- SiO).sub.cSi(R.sup.13).sub.2H
or formula H(R.sup.13).sub.2SiO(R.sup.14.sub-
.2SiO).sub.a(R.sup.15HSiO).sub.bSi(R.sup.13).sub.2H, designated
herein as A.sup.2. In these formulas, R.sup.13, R.sup.14, and
R.sup.15 are alkyl groups with 1-6 carbon atoms, a is 0-250, b is
1-250, and c is 0-250. The molar ratio of compounds A.sup.1:
A.sup.2 is 0-20, preferably 0-5. It is preferred that compounds of
both types A.sup.1 and A.sup.2 be used. The alpha, omega diene in
part (b) is a compound of the formula
CH.sub.2.dbd.CH(CH.sub.2).sub.xCH.dbd.CH.sub.2 where x is 1-20.
Representative examples of suitable alpha, omega-dienes include
1,4-pentadiene; 1,5-hexadiene; 1,6-heptadiene; 1,7-octadiene;
1,8-nonadiene; 1,9-decadiene; 1,11-dodecadiene;
1,13-tetradecadiene; and 1,19-eicosadiene. Particular elastomers of
interest of this type include DC-9040 and DC-9045, both from Dow
Corning Corporation (Midland Mich.).
[0049] Another non-emulsifying elastomer described herein is a
dimethicone/vinyldimethicone crosspolymer composition which: (1) is
used at a concentration of 4-10% in cyclomethicone (particularly
4-7%, and, more particularly, 4-6.5%) (for example, where the
cyclomethicone is a D4 or D5 cyclomethicone); (2) has a refractive
index in the range of 1.392-1.402 at 25 degrees C.; and (3) has a
viscosity in the range of 0.013-1.times.10.sup.4 Pascal seconds.
Examples of these include KSG-15 and USG-103, both from Shin-Etsu
Silicones of America (Akron, Ohio).
[0050] Note that the DC-9040 and DC-9045 products, and the KSG-15
and USG-103 products are normally sold in combination with
cyclomethicone.
[0051] The antiperspirant active can be selected from the group
consisting of any of the known antiperspirant active materials.
These include, by way of example (and not of a limiting nature),
aluminum chlorohydrate, aluminum chloride, aluminum
sesquichlorohydrate, zirconyl hydroxychloride, aluminum-zirconium
glycine complex (for example, aluminum zirconium trichlorohydrex
gly, aluminum zirconium pentachlorohydrex gly, aluminum zirconium
tetrachlorohydrex gly and aluminum zirconium octochlorohydrex gly),
aluminum chlorohydrex PG, aluminum chlorohydrex PEG, aluminum
dichlorohydrex PG, and aluminum dichlorohydrex PEG. The
aluminum-containing materials can be commonly referred to as
antiperspirant active aluminum salts. Generally, the foregoing
metal antiperspirant active materials are antiperspirant active
metal salts. In the embodiments which are antiperspirant
compositions according to the present invention, such compositions
need not include aluminum-containing metal salts, and can include
other antiperspirant active materials, including other
antiperspirant active metal salts. Generally, Category I active
antiperspirant ingredients listed in the Food and Drug
Administration's Monograph on antiperspirant drugs for
over-the-counter human use can be used. In addition, any new drug,
not listed in the Monograph, such as aluminum nitratohydrate and
its combination with zirconyl hydroxychlorides and nitrides, or
aluminum-stannous chlorohydrates, can be incorporated as an
antiperspirant active ingredient in antiperspirant compositions
according to the present invention.
[0052] Particular types of antiperspirant actives include aluminum
zirconium trichlorohydrex and aluminum zirconium tetrachlorohydrex
either with or without glycine. A particular antiperspirant active
is aluminum trichlorohydrex gly such as AZZ-902 SUF (from Reheis
Inc., Berkley Heights, N.J.) which has 95% of the particles less
than 10 microns in size and AA ZG 7167 and AA ZG 7168 (from Summit
Research Labs, Huguenot, N.Y.) which also has 95% of the particles
less than 10 microns in size.
[0053] Another particular type of antiperspirant salt of interest
is the group that has a low metal to chloride ratio such as in the
range of 0.9-1.2:1. Examples of such salts are described in U.S.
Pat. No. 6,375,937.
[0054] Antiperspirant actives can be incorporated into compositions
according to the present invention in amounts in the range of
0.1-25% of the final composition, but the amount used will depend
on the formulation of the composition. For example, at amounts in
the lower end of the broader range (for example, 0.1-10% on an
actives basis), a deodorant effect may be observed. At lower levels
the antiperspirant active material will not substantially reduce
the flow of perspiration, but will reduce malodor, for example, by
acting as an antimicrobial material. At amounts of 10-25% (on an
actives basis) such as 15-25%, by weight, of the total weight of
the composition, an antiperspirant effect may be observed.
[0055] The antiperspirant active material is desirably included as
particulate matter suspended in the composition of the present
invention in amounts as described above, but can also be added as
solutions or added directly to the mixture.
[0056] The polyethylene beads useful with this invention have a
density in the range of 0.91-0.98 g/cm.sup.3 and a particle size in
the range of 5-40 microns, with one particular type of polyethylene
having a particle size of 20 microns. All particle sizes are
averages. Several types of suitable polyethylene beads that are
commercially available are MICROTHENE FN 510 from Equistar
Chemicals LP (Houston, Tex.); and ACUMIST A-6 from Allied Signal
Corp., Morristown, N.J.). It is believed that the polyethylene
component contributes to the reduction in syneresis and is also
responsible for giving the products a powdery feel as determined by
trained sensory panels.
[0057] These compositions are soft solids made as suspensions and
thickened or gelled by the elastomer component. While other
thickeners may be used, the compositions of this invention will
normally use the elastomer component as the only gellant. Of course
various viscosities for a soft solid may be made depending on the
amount of elastomer material and the amount of other ingredients
used. One group having a more viscous form will have a viscosity in
the range of 25,000-2,000,000 centipoise, particularly
50,000-1,000,000 centipoise, and suitable for use with an
applicator with porous openings or slots such as those described in
U.S. Ser. No. 9/191,897 (PCT 99/25570) incorporated by reference
herein as to the description of the applicators. Another form will
have a lower viscosity such as in the range of 20,000-200,000
centipoise and will be suitable for use with applicators requiring
a thinner composition, for example roll-on applicators which have a
rolling ball structure. For example, such roll-on applicators are
described in U.S. Pat. Nos. 5,158,385 and 4,984,921. incorporated
by reference herein as to the description of the applicators.
[0058] While various forms have been described, it is believed that
the compositions made according to this inventions should
preferably have a ratio of elastomer to antiperspirant active in
the range of 1:2-1:20 in order to achieve the optimum improved
efficacy and the improved stability that has been observed.
[0059] Compositions according to the present invention can be made
by mixing the silicone gel material with, active ingredient(s) and
optionally one or more of emollient(s), thickener(s) and fragrance.
Mixing conditions and the use of heating will depend on what types
of materials are being combined and; the melting points for those
materials as are known to those skilled in the art. For example if
soft solids, roll-ons or gels are being made, temperatures, in the
range of room temperature or slightly higher (for example, 25-50
degrees C., particularly 23-30 degrees C.) may be used. For stick
products and soft solid/cream products made with higher melting
point materials (for example, high temperature waxes) temperatures
from 25-85 degrees C. may be used. The mixture can be introduced
into dispensing containers known to those skilled in the art
including those for solids, gels, roll-ons, soft solids and creams.
In one particular example, slotted dispensers may be used such as
those known in the art, for example, those having a parallel row or
rows of straight or curved slots or holes with a screw mechanism
for forcing the composition through the top as the product is
used.
[0060] Where the dispensing containers have a top surface with
slots therein, the composition can be rubbed onto the skin from the
top surface of the container (itself fed from a reservoir of
product in the container) so as to deposit an adequate amount of
the cosmetic composition on to the skin. The cosmetic composition,
for example, an antiperspirant and/or deodorant in the form of a
soft solid, can be extruded from inside the dispensing container
through the slots or holes onto the top of the surface of the
dispensing container, and from there may be applied to the skin in
the axillary regions to deposit sufficient amounts of
antiperspirant and/or deodorant active material to reduce body
malodor and/or reduce perspiration in axillary regions of the human
body.
EXAMPLES
[0061] The following Examples are offered as illustrative of the
invention and are not to be construed as limitations thereon. In
the Examples and elsewhere in the description of the invention,
chemical symbols and terminology have their usual and customary
meanings. In the Examples as elsewhere in this application (a)
values for n, m, etc. in formulas, molecular weights and degree of
ethoxylation or propoxylation are averages; (b) temperatures are in
degrees C. unless otherwise indicated; and (c) the amounts of the
components are in weight percents based on the standard described;
if no other standard is described then the total weight of the
composition is to be inferred. Various names of chemical components
include those listed in the CTFA International Cosmetic Ingredient
Dictionary (Cosmetics, Toiletry and Fragrance Association, Inc.,
7.sup.th ed. 1997). Mixing techniques used to make the compositions
are those conventionally used in the art including those described
above.
Examples 1A-6A
[0062] Preparation of Soft Solid With and Without
Superabsorbent
[0063] The solvent components such as the volatile silicone (for
example, cyclomethicone), non-volatile silicone (for example,
phenyl trimethicone), and emollients (for example, C12-15 alkyl
benzoate, neopentyl glycol diheptanoate, and isopropyl myristate)
are added to a Hobart Mixer (Model N-50 from Hobart Corp., Troy,
Ohio). The mixture is blended for about 5 minutes. The
antiperspirant active is then added as a dry powder with continuous
mixing for 15 minutes. The superabsorbent powder (if used) is now
added and mixed for 10 minutes. The polyethylene beads are added
and mixed for 10 minutes. The elastomer is then added and blended
for an additional 15 minutes. The cooling agent/fragrance mixture
is separately prepared by weighing L-Menthol and Menthyl lactate
(Frescolat ML) into a small beaker, adding the fragrance and
dissolving the solid menthol by gentle agitation at room
temperature. The cooling agent/fragrance mixture is then added to
the reaction vessel, blended for 5 minutes and transferred into
suitable containers, such as those described above with straight or
curved parallel slotted openings.
[0064] Batches of 500 gram size may be made with the types and
amounts of ingredients listed in TABLE A. All amounts are in weight
% based on the total weight of the composition.
[0065] The antiperspirant active is AZZ 902 SUF (Reheis, Berkeley
Heights, N.J.).
[0066] The polyethylene is Microthene FN510 (Equistar).
[0067] The cyclomethicone is DC 345 (Dow Corning).
[0068] The superabsorbent is A180 (Grain Processing Corp.)
[0069] The elastomer is DC 9040 (Dow Corning) which is 12-13%
elastomer in cyclomethicone (DC 245 from Dow Coming). The amount of
elastomer in the table may be back calculated to get the exact
amount of elastomer and the additional amount of
cyclomethicone.
1 TABLE A Ingredient #1A #2A #3A #4A #5A #6A Neopentyl glycol 0.50
0.50 0.50 0.50 0.50 0.50 diheptanoate Cyclomethicone 5.80 0.80 6.30
1.30 3.30 3.80 Phenyl trimethicone (DC 0.50 0.50 0.50 0.50 0.50
0.50 556) Isopropyl myristate 0.50 0.50 0.50 0.50 0.50 0.50 C12-15
Alkylbenzoate 7.00 7.00 7.00 7.00 7.00 7.00 Antiperspirant active
25.00 25.00 25.00 25.00 25.00 25.00 Polyethylene 6.00 6.00 6.00
6.00 6.00 6.00 Superabsorbent 0 5.00 0 5.00 2.50 2.50 Elastomer
52.50 52.50 52.50 52.50 52.50 52.50 Fragrance 1.20 1.20 1.20 1.20
1.20 1.20 L-Menthol 0.40 0.40 0.20 0.20 0.40 0.20 Menthyl lactate
0.60 0.60 0.30 0.30 0.60 0.30 Total 100 100 100 100 100 100
* * * * *