Note: Descriptions are shown in the official language in which they were submitted.
,
81795044
CLEAR CLEANSING COMPOSITIONS COMPRISING AN ALKOXYLATED METHYL
GLUCOSE ETHER THICKENER, A CATIONIC SURFACTANT, AND A NON-IONIC
SURFACTANT
BACKGROUND
[0001] Cationic surfactants can provide antibacterial properties to a
cleansing composition.
When cationic surfactants are mixed with nonionic surfactants, there is
generally a need to use
thickeners to increase the viscosity to a level that is expected by consumers
for a cleansing
composition, such as a liquid hand soap or body wash. While polyacrylate
thickeners can
increase the viscosity, they can make the cleansing composition opaque or
translucent. It
would be desirable to provide a cleansing composition containing cationic and
nonionic
surfactants that is transparent.
BRIEF SUMMARY
[0002] An aqueous cleansing composition comprising a cationic surfactant, a
nonionic
surfactant, and a thickener comprising an alkoxylated methyl glucose ether,
wherein a weight
ratio of cationic surfactant to nonionic surfactant is greater than 0.9:1.
[0003] The combination of the cationionic:nonionic surfactant ratio with the
alkoxylated
methyl glucose ether thickener provides the composition with cold weather
stability. Cold
weather stability is observed when the composition remains transparent after
cold storage.
[0003a] In one aspect, there is provided an aqueous cleansing composition
comprising a
cationic surfactant, a nonionic surfactant, and a thickener comprising at
least one of an
alkoxylated methyl glucose ether or fatty acid esterified product thereof, and
PEG-150
distearate, wherein the weight ratio of the cationic surfactant to the
nonionic surfactant is
greater than 0.9:1, and wherein the composition is transparent after 24 hours
at 4.5 C.
[0003b] In another aspect, there is provided a method of cleansing skin
comprising washing
skin with the cleansing composition as described herein, and optionally
rinsing with water.
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[0003c] In another aspect, there is provided a cleansing composition
comprising a) 0.5 to
weight % cationic surfactant comprising cetyl trimethyl ammonium chloride; b)
0.5 to
5 weight % nonionic surfactant comprising lauryl/myristyl amdiopropyl
dimethylamine oxide
and cocomonoethanolamide; c) 0.1 to 2 weight % thickener selected from the
group
consisting of PEG-120 methyl glucose dioleate, PEG-150 distearate, and
mixtures thereof;
wherein the weight ratio of the cationic surfactant to the nonionic surfactant
is greater
than 0.9:1; and wherein the composition is transparent after 24 hours at 4.5
C.
[0004] Further areas of applicability of the present invention will become
apparent from the
detailed description provided hereinafter. It should be understood that the
detailed description
and specific examples, while indicating the preferred embodiment of the
invention, are
intended for purposes of illustration only and are not intended to limit the
scope of the
invention.
DETAILED DESCRIPTION
[0005] The following description of the preferred embodiment(s) is merely
exemplary in
nature and is in no way intended to limit the invention, its application, or
uses.
[0006] As used throughout, ranges are used as shorthand for describing each
and every value
that is within the range. Any value within the range can be selected as the
terminus of the
range. In the event of a conflict in a definition in the present disclosure
and that of a cited
reference, the present disclosure controls.
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10007i Unless otherwise specified, all percentages and amounts expressed
herein and elsewhere
in the specification should be understood to refer to percentages by weight.
The amounts given.
are based on the active weight of the material.
100081 For the purpose of calculating a cationic surfactant to nonionic
surfactant ratio, cationic.
surfactant does not include a cationic antibacterial agent selected from the
group consisting of
benzalkonMin chloride, benzethonium chloride, and mixtures thereof. While
these materials
may function as a cationic surfactant, they are not included in the
calculation.
1.0009j 'fransparency is defined as the ability to read 12-point font through
the composition
contained in a 4oz clear, glass sample bottle of 4cm. thickness. Transparency
is measured after
24 hours at 4.5C.
100101 Viscosity is measured using a Brookfield MIT viscometer with spindle #
5 at 25 rpm at
25"C.
1.001.11 The composition includes a cationic surfactant. The cationic
surfactant can be any
canonic surfactant, but it excludes the cationic bacterial agent for weight
ratio calculation. In
certain embodiments, the cationic surfactant comprises a quaternary ammonium
alkyl salt_ The
quaternary ammonium. alkyl salt can be an alkyltrimethylammonium salts. The
salt can be a
halide, such as chloride or bromide, or a methosulfate. The alkyl can be a C8-
C24 alkyl or a
C14-C18 alkyl. In certain embodiments, the cationic surfactant is
cetyltriniethylammonitim
chloride.
100121 In certain embodiments, the cationic surfactant is present in an amount
of 0.1 to 20
weight % of the composition. In other embodiments, the amount is 0.1 to 10,
0.1 to 5, 0.5 to 10,
0.5 to 5, 1 to 5, or 2 to 4 weight %.
[00131 The composition includes a nonionic surfactant. The nonionic
surfactants can be any
nonionic surfactant. Nonionic surfactants include, but are not limited to,
amine oxides, fatty acid
amides, ethoxylated fatty alcohols, block copolymers of polyethylene glycol
and polypropylene
glycol, glycerol alkyl esters, alkyl polyglucosides, polyoxyethylene glycol
octylphenol ethers,
sorbitan alkyl esters, polyoxyethylene glycol sorbitan alkyl esters, and
mixtures thereof.
Examples of amine oxides include, but are not limited to, latirOamidopropyl
dimethylamine
oxide, myristylamidopropyl dimethylamine oxide, and mixtures thereof. Examples
of fatty acid
amides include, but are not limited to, cocomonoethanolatnide, lauramide
motioethanolamide,
cocodierhanoiamide, and mixtures thereof,
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100141 In certain embodiments, the nonionic surfactant is a combination of an
amine oxide and a
fatty acid amide. In certain embodiments, the amine oxide is a mixture of
latnylamidopropyt.
dimethylamine oxide and myristylamidopropyl dimethylamine oxide. In certain
embodiments,
the nonionic surfactant is a combination of laurylimyristylamidopropyl
dimethylamine oxide and
cocomonoethanalarnide.
100151 In certain embodiments, the nonionic surfactant is present in an amount
of 0.1 to 20
weight A) of the composition. In other embodiments, the amount is 0.1 to 10,
0.1 to 5, 0.5 to 10,
0.5 to 5, or 0.5 to 3 weight 'YD.
[00161 The composition has a cationic:nonionic weight ratio greater than
0.9:1. Optionally, the
ratio is at least 1:1.,
100171 In certain embodiments, the composition does not contain an anionic
surfactant.
[00.181 The composition also includes a thickener comprising an alkoxylated
methyl glucose
ether. The alkoxylation can be ethoxylated and/or propoxylated. In certain
embodiments, it is
ethoxylated. The degree of alkoxylation can be any degree that provides
thickening. In certain
embodiments, the degree of alkoxylation is 100 to 200. In certain embodiments,
the alkoxylation
is 120 to 150. The alkoxylated methyl glucose ether can be esterified with
fatty acid. In certain
embodiments, the alkoxylated methyl glucose ether at least one of an
alkoxylated methyl glucose
dioleate, an alkoxylated methyl glucose trioleate, alkoxylated methyl glucose
distearate. In
certain embodiments, the alkoxylated methyl g,lucaside is at least one of PEG-
120 methyl
glucose dioleate, PEG-120 methyl glucose. trioleate, PEG-120 methyl glucose
distearate. In
certain embodiments, the alkoxylated methyl glucose ether is PEG-120 methyl
glucose dioleate.
[00191 The thickener can be present in any amount to provide any desired
viscosity level. In
certain embodiments, the thickener is present in an amount of 0.1. to 2 weight
% of the
composition. In other embodiments, the amount is OA to 1,0.2 to 1,0.3 to 1,
0.4 to 1,0.1 to 0.9,
0.1 to 0.8, 0.1 to 0.7, 0.3 to 0.8, or 0.4 to 0.8 weight %. In one embodiment,
the amount is 0.4 to
0.7 weight %. In certain embodiments, the viscosity is at least 1000 teas. In
other
embodiments, the viscosity is at least 2000, at least 3000, or at least 4000
mPas. In certain
embodiments, the viscosity is 1000 to 20000, 3000 to 6000, or 3500 to 5000
niPas.
100201 In certain embodiments, the composition does not include a polyacrylate
thickener.
100211 The composition can. include a cationic antibacterial agent selected
from the group
consisting of benzalkonium chloride, benzethonium chloride, and mixtures
thereof. In certain
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embodiments, the composition includes benzalkonium Chloride. These cationic
antibacterial
agents can be included in their regulatory amount., which can be 0.13 weight
%.
1100221 The composition is aqueous. In certain embodiments, water can be
included in an
amount of 70 to 95 weight '11i, of the composition. In other embodiments, the
amount of water is
90 -to 95 weight %.
100231 In certain embodiments, the composition can further include salt, such
as sodium chloride
to assist in increasing viscosity at upper ranges of viscosity. In certain
embodiments, the salt is
present at 0.1 to 1,2 weight % of the composition_ in certain embodiments, the
amount is about
0_6 weight%.
1002411 The cleansing compositions can be used to cleanse Skin by washing skin
with the
cleansing composition and optionally rinsing with water.
EXAMPLES
[00251 The examples and comparative examples are made by mixing of the
materials. The
compositions are shown in Tables I :and 2 below-. The examples list the
cationicnonionie
surfactant ratio. The viscosity and the transparency after storage at 4.5c;C.
are measured.
Table 1
Material Example 1 Example 2 Example 3
De i on ized Water and minors Qs QS os
u ry UNly ri sty I am id opropyi 1.68 .1.68 0.6
di m ethyl amine oxide
Cocomonoethanolamide 0.97 1.02 0.4
Cetrimonitim chloride 2.75
B en za I k.oni um chloride 0.13 0.13 0.13
PEG 120 Methyl Glucose 0.54 0,6 0,54
Dioleate
Glycerin 2
Sodium chloride 0.62 0,62 0_62
' 0.
Cationic:Nonionic 9211 1.06:1 311
surfactant ratio
Transparency after cold Clear Clear Clear
storage
Viscosity (mPas) 4340 4740 5210
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Table 2
Material Comparative Comparative Comparative Comparative
A F3 C D
Deionized Water and minors QS QS I QS QS
La uryl/Myristylamidopropyl 1.68 1.51 1_68 :
di methylamine oxide
Cocomonoethanolamide , 1.1 1,12 1.12 1
Cetrimonium chloride 2.25 2.24; 2.25 1
I3enzalkoniUM chloride ' 0.13 0.13 0.13 0.13
PEG 120 Methyl Glucose 0.66 0.66 0.54 0.6
Dioieate
Glycerin ') ') 2 7
Sodium chloride , 0.62 , 0.62 0.62 0.62
.
-
Cationic:Nonionic 0.81:1 0.85:1 0,80:1 0.33:1
surfactant ratio
Transparency after cold Hazy Hazy Hazy Hazy
storage
Viscosity (mPas) 4600 4000 1 4340 4470
[0026] As can be seen in the examples, the combination of the PEG,120 methyl
glucose di:Mew
and the cationic:nonionic surfactant ratio provides a composition that is
clear after cold storage
and has a desired viscosity over 4000 mPas. When PEG-I 20 methyl glucose
dioleate is present
in all compositions, a desired viscosity is obtained, but when the
cationic:nonionic surfactant
ratio is less than 0.9 in the comparative examples, the composition is hazy
after cold storage.
