U.S. patent application number 12/935311 was filed with the patent office on 2011-05-19 for foamable skin washing agent.
This patent application is currently assigned to SHISEIDO COMPANY, LTD.. Invention is credited to Hidefumi Araki, Tomohiko Kimura.
Application Number | 20110118164 12/935311 |
Document ID | / |
Family ID | 41135450 |
Filed Date | 2011-05-19 |
United States Patent
Application |
20110118164 |
Kind Code |
A1 |
Kimura; Tomohiko ; et
al. |
May 19, 2011 |
Foamable Skin Washing Agent
Abstract
To provide a skin washing agent which is excellent in the
foaming speed and the foam creaminess in washing therewith, and
which, after washing therewith, is excellent in the moist feeling
and the absence of pulling feeling of the skin and does not change
the moisture content of skin. A foamable skin washing agent
comprising (a) a fatty acid salt, (b) one or more selected from a
homopolymer, a dipolymer and a terpolymer derived from a specific
cationated monomer (e.g., dimethyldiallylammonium chloride), (c) a
polyglyceryl monoalkyl ether, and (d) one or more selected from an
acylmethyltaurine salt and a hydroxy ether carboxylate salt.
Inventors: |
Kimura; Tomohiko; (Kanagawa,
JP) ; Araki; Hidefumi; (Kanagawa, JP) |
Assignee: |
SHISEIDO COMPANY, LTD.
Chuo-ku, Tokyo
JP
|
Family ID: |
41135450 |
Appl. No.: |
12/935311 |
Filed: |
March 27, 2009 |
PCT Filed: |
March 27, 2009 |
PCT NO: |
PCT/JP2009/056375 |
371 Date: |
December 12, 2010 |
Current U.S.
Class: |
510/130 |
Current CPC
Class: |
C11D 1/72 20130101; A61K
8/39 20130101; A61K 8/42 20130101; A61Q 19/10 20130101; C11D 1/835
20130101; A61K 8/8158 20130101; A61K 8/817 20130101; C11D 1/62
20130101 |
Class at
Publication: |
510/130 |
International
Class: |
A61K 8/92 20060101
A61K008/92; A61Q 19/10 20060101 A61Q019/10 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 31, 2008 |
JP |
2008-089209 |
Claims
1. A foamable skin washing agent comprising (a) a fatty acid salt,
(b) one or more polymers selected from a homopolymer, a dipolymer
and a terpolymer derived from a cationated monomer represented by
the following formula (I): ##STR00007## (in formula (I), R.sub.1
and R.sub.2 each independently represent a hydrogen atom, or an
alkyl group having from 1 to 4 carbon atoms; and Y.sup.- represents
a monovalent inorganic or organic anion), (c) a polyglyceryl
monoalkyl ether represented by the following formula (II):
##STR00008## (in the formula (II), n indicates an integer of from 6
to 22, and m indicates an integer of 3 or more), (d) one or more
selected from an acylmethyltaurine salt and a hydroxy ether
carboxylate salt.
2. The foamable skin washing agent as claimed in claim 1, wherein
component (b) is one or more polymers selected from
dimethyldiallylammonium chloride polymers, dimethyldiallylammonium
chloride/acrylamide copolymers, and dimethyldiallylammonium
chloride/acrylamide/acrylic acid copolymers.
3. The foamable skin washing agent as claimed in claim 1, which
contains component (a) in an amount of from 2 to 90% by mass,
component (b) in an amount of from 0.01 to 10% by mass, component
(c) in an amount of from 0.01 to 20% by mass, and component (d) in
an amount of from 1 to 20% by mass.
Description
TECHNICAL FIELD
[0001] The present invention relates to a foamable skin washing
agent which has sufficient detergency to the dirt of a skin
surface, and is especially excellent in the foaming speed and the
foam creaminess in washing therewith, and which ameliorates a
pulling feeling of the skin after washing therewith, and improves a
moist feeling and does not lower the moisture content of the
skin.
BACKGROUND ART
[0002] Of skin washing agents, the properties of the foams to form
in washing therewith and the feeling in use thereof are important
points to be preferred by consumers, in addition to the primary
function of detergency thereof. In particular, those capable of
foaming rapidly, capable of forming fine and creamy foams and
capable of giving a moist feeling to skin without dehydrating it
after washing therewith not giving any skin pulling feeling tend to
be preferred by consumers.
[0003] Regarding the problems, various types of surfactants, oily
ingredients, polymers or the like are heretofore broadly
incorporated in the base of a skin washing agent to thereby
favorably improve the feeling of foams and the feeling of skin.
However, a skin washing agent with a surfactant having high
detergency incorporated therein has some problems in that it
roughens skin excessively and, after toweling, it may often give a
skin-tightness or skin pulling feeling. In addition, it has another
problem in that the moisture may be removed from the skin washed
therewith and the moisture content of the skin may be thereby
reduced.
[0004] As a technique of incorporating a surfactant in the base of
a skin washing agent, for example, there is proposed a method of
incorporating a polyglycerin monoalkyl ether therein (e.g., see
Patent References 1 and 2). However, incorporation of such a
polyglycerin monoalkyl ether lowers the elasticity of foams, and is
therefore unsatisfactory to users since they could not have a
feeling of creamy foams.
[0005] Additionally, a washing agent is proposed which comprises a
combination of a polyglycerin monoalkyl ether, a fatty acid salt,
and an ampholytic surfactant and/or a semipolar surfactant (see
Patent Reference 3). The combination could give a refreshed feeling
but may give a pulling feeling of the skin, and is insufficient in
point of the foaming speed and the quality of foams and is
therefore unsatisfactory to users.
[0006] On the other hand, as a technique of enhancing the
foamability and the quality of foams, there is proposed a method of
incorporating a polymer in the base of a skin washing agent. For
example, there are known a skin washing agent with a
polydimethyldiallylammonium chloride or a dimethyldiallylammonium
chloride/acrylamide copolymer incorporated therein (e.g., see
Patent Reference 4), a skin washing agent with an acrylic
acid/dimethyldiallylammonium chloride/acrylamide terpolymer
incorporated therein (e.g., see Patent References 5 and 6).
[0007] However, these skin washing agents with such a polymer
incorporated therein could not be said still satisfactory in point
of the foaming speed, and it is difficult to say that the agents
could attain a sufficient effect in point of giving a moist feeling
with no pulling feeling of the skin washed with them. [0008] Patent
Reference 1: JP 2006-282894A [0009] Patent Reference 2: JP
2006-282895A [0010] Patent Reference 3: JP 2007-146029A [0011]
Patent Reference 4: JP 62-4799A [0012] Patent Reference 5: JP
2001-64678A [0013] Patent Reference 6: JP 2003-73257A
DISCLOSURE OF THE INVENTION
Problems that the Invention is to Solve
[0014] In consideration of the above-mentioned prior-art problems,
an object of the present invention is to provide a skin washing
agent which is excellent in the foaming speed and the foam
creaminess in washing therewith, and which, after washing
therewith, is excellent in a moist feeling and being free from
pulling feeling of the skin, and which does not lower the moisture
content of the skin.
Means for Solving the Problems
[0015] Heretofore, soap (fatty acid alkali salt) has been used as
the main ingredient of a skin washing agent because of its
detergency. However, soap bonds with a divalent metal ion, such as
calcium, magnesium or the like, in tap water to form a
water-insoluble metal soap (scum), which is said to have some
negative influences on the refreshed feeling and other good
feelings peculiar to soap, and adhere to skin to give thereto a
skin-pulling feeling or reduce the moisture content of skin. The
method for preventing such scum from adhering to skin may be
divided broadly into two, a method of preventing/controlling the
formation of scum, and another method of making the formed scum
readily removable by washing to thereby prevent the scum from
adhering to skin. The former method of preventing/controlling the
formation of scum includes use of non-soap washing agents, control
of counter ions and the like, which, however, involve some problems
in that the production cost is high and the usable base is limited.
On the other hand, the latter method of making the formed scum
readily removable by washing to thereby prevent the scum from
adhering to skin includes use of some additive to enhance the scum
dispersibility. This method may utilize the conventional soap
technology for the washing agent therein and is therefore
advantageous in point of the production cost in that it is free
from limitation on the usable base.
[0016] Specifically, the present invention provides a foamable skin
washing agent comprising (a) a fatty acid salt, (b) one or more
polymers selected from a homopolymer, a dipolymer and a terpolymer
derived from a cationated monomer represented by the following
formula (I):
##STR00001##
(in formula (I), R.sub.1 and R.sub.2 each independently represent a
hydrogen atom, or an alkyl group having from 1 to 4 carbon atoms;
and Y.sup.- represents a monovalent inorganic or organic anion),
(c) a polyglyceryl monoalkyl ether represented by the following
formula (II):
##STR00002##
(in the formula (II), n indicates an integer of from 6 to 22, and m
indicates an integer of 3 or more), (d) one or more selected from
an acylmethyltaurine salt and a hydroxy ether carboxylate salt.
[0017] Preferably, component (b) is one or more polymers selected
from dimethyldiallylammonium chloride polymers,
dimethyldiallylammonium chloride/acrylamide copolymers, and
dimethyldiallylammonium chloride/acrylamide/acrylic acid
copolymers.
Advantage of the Invention
[0018] The foamable skin washing agent of the invention has the
advantages of detergency, rapid foamability in washing, excellent
creaminess of foams, impartation of no pulling feeling of the skin
after washing, impartation of moist feeling to skin and no
influence of reducing the skin moisture content, which are
remarkably more excellent than those of conventional washing
agents.
BEST MODE FOR CARRYING OUT THE INVENTION
[0019] The invention is described in detail hereinunder.
[0020] Component (a), fatty acid salt for use in the invention is a
fatty acid soap and is preferably a fatty acid salt having from 10
to 22 carbon atoms. The salt includes alkali metal salts, organic
amine salts, and ammonium salts. Specific examples of the component
(a) include sodium laurate, sodium myristate, sodium palmitate,
sodium stearate, sodium oleate, potassium laurate, potassium
myristate, potassium palmitate, potassium stearate, and potassium
oleate. These may be prepared, for example, by neutralizing the
corresponding fatty acid with an alkali, such as potassium
hydroxide, sodium hydroxide, triethanolamine or the like. One or
more of those may be employed here as component (a).
[0021] The amount of component (a) to be in the skin washing agent
of the invention may be within a range of from 2 to 90% by mass of
the agent, but its preferred amount may differ depending on the
formulation of the agent. In a liquid washing agent, the amount is
preferably from 5 to 30% by mass, and in a creamy washing agent,
the amount is preferably from 10 to 50% by mass. When the amount of
component (a) is less than 2% by mass, then the foamability and the
refreshed feeling would not be sufficient; but on the other hand,
when more than 90% by mass, then the viscosity and the hardness of
the base would increase and the producibility may worsen.
[0022] Component (b) is one or more polymers selected from a
homopolymer, a dipolymer and a terpolymer derived from a cationated
monomer represented by the following formula (I):
##STR00003##
[0023] In formula (I), the definitions of the substituents are as
follows:
[0024] R.sub.1 and R.sub.2 each independently represent a hydrogen
atom, or an alkyl group having from 1 to 4 carbon atoms. The alkyl
group may be linear or branched, and may be partly substituted with
a hydroxyl group or a fluorine atom. The said substituted or
unsubstituted alkyl group having from 1 to 4 carbon atoms includes
a methyl group, an ethyl group, a propyl group, a butyl group, a
2-hydroxyethyl group, a 2-hydroxypropyl group, a trifluoromethyl
group, and a trifluoroethyl group.
[0025] Y.sup.- represents a monovalent inorganic or organic anion.
The monovalent inorganic anion includes a chloride ion, a fluoride
ion, and an iodide ion; and the monovalent organic anion includes a
sulfate ion, an acetate ion, a benzenesulfonate ion, and a
phosphate ion.
[0026] Examples of the cationated monomer represented by the above
formula (I) include dimethyldiallylammonium chloride,
diethyldiallylammonium chloride, dipropyldiallylammonium chloride,
dimethyldiallylammonium sulfate, diethyldiallylammonium sulfate,
and dipropyldiallylammonium sulfate. Of those, preferred for use
herein is dimethyldiallylammonium chloride (hereinafter this may be
referred to as "DADMAC").
[0027] A polymer composed of only the cationated monomer of formula
(I) is the homopolymer. A copolymer composed of the cationated
monomer of formula (I) and any other monomer is the dipolymer or
the terpolymer, the former comprising one other monomer but the
latter comprising two other monomers.
[0028] Component (b) is broadly divided into categories of a
cationated polymer and an ampholytic polymer depending on the
monomer combination therein. The homopolymer is produced from only
the cationated monomer of formula (I), and is therefore a
cationated polymer. A copolymer of a cationated monomer and a
nonionic monomer is categorized as a cationated polymer. On the
other hand, a polymer produced through copolymerization of a
cationated monomer and an anionic monomer or an ampholytic monomer
is an ampholytic polymer.
[0029] The nonionic monomer copolymerizable with the cationated
monomer of formula (I) is not specifically defined; and its
preferred examples include acrylamide, methacrylamide,
N-methylacrylamide, N-methylmethacrylamide, N,N-dimethylacrylamide,
N,N-diethylmethacrylamide, N-cyclohexylacrylamide,
N-cyclohexylmethacrylamide, N,N-di(ethylene glycol)acrylamide,
N,N-di(ethylene glycol)methacrylamide, N-polyethylene glycol (10
mol) acrylamide, N-polyethylene glycol (10 mol) methacrylamide,
N-polyethylene glycol ethyl ether (10 mol) acrylamide, and
N-polyethylene glycol ethyl ether (10 mol) methacrylamide. Of
those, more preferred is acrylamide.
[0030] The anionic monomer copolymerizable with the cationated
monomer of formula (I) is not specifically defined; and its
preferred examples include acrylic acid, methacrylic acid, sodium
acrylate, sodium methacrylate, ammonium acrylate, and ammonium
methacrylate. Of those, more preferred is acrylic acid.
[0031] The ampholytic monomer copolymerizable with the cationated
monomer of formula (I) includes monomers having one or more betaine
skeletons in the molecule (e.g., N-aminopropylacrylamide-betaine,
N-aminopropylmethacrylamide-betaine), but not limited thereto.
[0032] The content of the cationated monomer of formula (I) in
component (b) is preferably from 2 to 100% by mass of the amount of
all the constitutive monomers, more preferably from 5 to 100% by
mass. When the content is less than 2% by mass, then the nature of
the other monomer to be copolymerized would be too strong and the
present monomer could not fully exhibit its function. Preferably,
the mass-average molecular weight of component (b) is from 5,000 to
7,500,000, more preferably from 10,000 to 5,000,000.
[0033] As component (b), a dimethyldiallylammonium (DADMAC) polymer
is a preferred example of the homopolymer; a DADMAC/acrylamide
copolymer is a preferred example of the dipolymer; and a
DADMAC/acrylamide/acrylic acid copolymer is a preferred example of
the terpolymer. However, the ingredient is not limited to these
examples.
[0034] The constituent ratio (by mass) of the two monomers in the
DADMAC/acrylamide copolymer is preferably from 10/90 to 90/10 as
DADMAC/acrylamide, more preferably from 80/20 to 20/80.
[0035] The constituent ratio (by mass) of the three monomers in the
DADMAC/acrylamide/acrylic acid copolymer is preferably from
40/20/40 to 10/80/10 as DADMAC/acrylamide/acrylic acid, more
preferably from 25/50/25 to 20/60/20.
[0036] Component (b) may be produced through polymerization or
copolymerization in any known polymerization method using the
cationated monomer of formula (I) or using it along with any other
copolymerizing monomer.
[0037] Commercial products may be used as component (b). For
example, the DADMAC polymer is commercially available as "Merquat
100" (by Nalco Company), "ME Polymer H40W" (by Toho Chemical
Industry Co., Ltd.). The DADMAC/acrylamide copolymer is
commercially available as "Merquat 550" (by Nalco Company), "ME
Polymer 09W" (by Toho Chemical Industry Co., Ltd.). The
DADMAC/acrylamide/acrylic acid copolymer is commercially available
as "Marcoat Plus 3300", "Marcoat Plus 3331") (both by Nalco), "ME
Polymer T-343" (by Toho Chemical). These may be used favorably
here. Needless-to-say, however, the ingredient is not limited to
these examples.
[0038] Preferably, the amount of component (b) to be in the skin
washing agent composition of the invention is from 0.01 to 10% by
mass, more preferably from 0.05 to 5% by mass. When the amount is
less than 0.01% by mass, then the creaminess of foams would be
insufficient; but on the other hand, when more than 10% by mass,
then the foaming speed may lower in some degree and the agent may
give a slimy feeling in rinsing.
[0039] Component (c) for use in the invention is a polyglyceryl
monoalkyl ether represented by the following formula (II), and this
is a nonionic surfactant.
##STR00004##
[0040] In the formula (II), n indicates an integer of from 6 to 22,
and is preferably from 8 to 16. When n is more than 22, the foaming
may be slow; but on the other hand, when less than 6, the
creaminess of foams may tend to be poor.
[0041] m indicates an integer of 3 or more, and is preferably from
3 to 25, more preferably from 4 to 20, even more preferably from 4
to 10. When m is less than 3, or when the number of m is too large,
then the effect of the ingredient to prevent the skin pulling
feeling after washing would be poor.
[0042] In formula (II), the alkyl group (C.sub.nH.sub.2n+1) may be
linear, branched or cyclic, and concretely includes a linear alkyl
group, such as a hexyl group, a heptyl group, an octyl group, a
nonyl group, a decyl group, an undecyl group, a dodecyl group, a
tridecyl group, a tetradecyl group, a pentadecyl group, a hexadecyl
group, a heptadecyl group, and an octadecyl group; a branched alkyl
group, such as a 2-ethylhexyl group, a 2-methylhexyl group, a
2-methylnonyl group, a 2-octyldecyl group, a 3,5,5-trimethylhexyl
group, and an isostearyl group; a cyclic alkyl group such as a
cyclohexyl group.
[0043] Component (c) is commercially available, for example, as
"Sunether L-4" (=polyglyceryl-4 lauryl ether), "Sunether L-10"
(both by Taiyo Chemical Industry Co., Ltd.), etc.; and these are
favorably used here.
[0044] The amount of component (c) to be in the skin washing agent
composition of the invention is preferably from 0.01 to 20% by
mass, more preferably from 0.05 to 10% by mass, even more
preferably from 0.1 to 5% by mass. When the amount is less than
0.01% by mass, then the ingredient would be ineffective for
sufficient foaming and for ameliorating feeling effects; but on the
other hand, when more than 20% by mass, the composition may be
difficult to prepare and its feeling in use would be poor. One or
more of the compounds may be used as component (c).
[0045] Component (d) in the invention is one or more selected from
an acylmethyltaurine salt and a hydroxyalkyl ether carboxylate
salt.
[0046] The acylmethyltaurine salt is an anionic surfactant
represented by the following formula (III):
##STR00005##
[0047] In formula (III), R.sub.3 represents an alkyl group or an
alkenyl group having from 7 to 21 carbon atoms; and R.sub.4
represents an alkyl group having from 1 to 3 carbon atoms.
[0048] M.sub.1 represents an alkali metal (e.g., lithium,
potassium, sodium), an alkaline earth metal (e.g., calcium,
magnesium), an ammonium or an organic amine (e.g.,
monoethanolamine, triethanolamine).
[0049] The acylmethyltaurine salt concretely includes
N-lauroylmethyltaurine sodium, N-myristoylmethyltaurine sodium,
N-palmitoylmethyltaurine sodium, and N-stearoylmethyltaurine
sodium. Of those, preferred are N-lauroylmethyltaurine sodium and
N-myristoylmethyltaurine sodium from the viewpoint of the
foamability thereof. N-cocoylmethyltaurine sodium obtained from
palm oil that is a vegetable oil is a mixture of the
above-mentioned N-lauroylmethyltaurine sodium,
N-myristoylmethyltaurine sodium and N-palmitoylmethyltaurine
sodium, and is therefore preferred for use here.
[0050] The hydroxyalkyl ether carboxylate salt is an anionic
surfactant represented by the following formula (IV):
##STR00006##
[0051] In formula (IV), R.sub.5 represents an alkyl group having
from 8 to 20 carbon atoms. M.sub.2 represents an alkali metal
(e.g., lithium, potassium, sodium), an alkaline earth metal (e.g.,
calcium, magnesium), an ammonium or an organic amine (e.g.,
monoethanolamine, triethanolamine).
[0052] Preferred examples of the hydroxyalkyl ether carboxylate
salt include sodium dodecane-1,2-diol acetate ether, but not
limited thereto.
[0053] The amount of component (d) to be in the skin washing agent
composition of the invention is preferably from 1 to 20% by mass of
the composition, more preferably from 2 to 10% by mass, even more
preferably from 3 to 5% by mass. When the amount is less than 1% by
mass, then the ingredient may be ineffective for rapid foamability
and foam formation and the composition could not foam well and
would be ineffective for ameliorating feeling effects; but on the
other hand, when more than 20% by mass, then it is unfavorable
since a lot of time may be taken for rinsing. One or more such
compounds may be employed here as component (d).
[0054] The production method of the skin washing agent of the
invention is not specifically defined. The agent may be produced in
an ordinary manner. Briefly, for example, a fatty acid is added to
water, and dissolved therein under heat at about 70.degree. C. A
potassium hydroxide solution is added thereto to neutralize it
thereby preparing a soap solution (component (a)). Next, component
(b), component (c) and component (d) are added to it and well
stirred, and then rapidly cooled to about 25.degree. C. to give a
skin washing agent. However, the production method is not limited
to this example.
[0055] The skin washing agent of the invention may contain any
other ingredient that may be generally incorporated in ordinary
washing agents, in addition to the above-mentioned components (a)
to (d), within a range not detracting from the object and the
effect of the washing agent of the invention. The additional
ingredient includes surfactants (except the above-mentioned
component (c) and component (d)). The type of the other surfactant
that may be in the agent of the invention is not specifically
defined, and any of anionic surfactants, cationic surfactants,
ampholytic surfactants and nonionic surfactants may be in the
agent.
[0056] The anionic surfactants include higher alkyl sulfate salts,
such as sodium lauryl sulfate, sodium lauryl sulfate, and potassium
lauryl sulfate; alkyl ether sulfate salts, such as POE-lauryl
sulfate triethanolamine, and POE-sodium lauryl sulfate;
N-acylsarcosine acids, such as sodium lauroylsarcosinate; phosphate
salts, such as POE-oleyl ether sodium phosphate, and POE-stearyl
ether phosphoric acid; sulfosuccinate salts, such as sodium
di-2-ethylhexylsulfosuccinate, monolauroyl monoethanolamide
polyoxyethylene sodium sulfosuccinate, and laurylpolypropylene
glycol sodium sulfosuccinate; alkylbenzenesulfonate salts, such as
sodium linear dodecylbenzenesulfonate, linear
dodecylbenzenesulfonic acid triethanolamine, and linear
dodecylbenzenesulfonic acid; higher fatty acid ester sulfate salts,
such as hardened coconut oil fatty acid glycerin sodium sulfate;
N-acylglutamate salts, such as monosodium N-lauroylglutamate,
disodium N-stearoylglutamate, and monosodium
N-myristoyl-L-glutamate; sulfate oils, such as Turkish red oil;
POE-alkyl ether carboxylic acids; POE-alkylallyl ether carboxylate
salts; .alpha.-olefinsulfonate salts; higher fatty acid ester
sulfonate salts; dialcohol sulfate salts; higher fatty acid
alkylamide sulfate salts; sodium lauroyl monoethanolamide
succinate; N-palmitoylaspartic acid ditriethanolamine; and casein
sodium.
[0057] The cationic surfactants include alkyltrimethylammonium
salts, such as stearyltrimethylammonium chloride, and
lauryltrimethylammonium chloride; alkylpyridinium salts, such as
cetylpyridinium chloride; distearyldimethylammonium chloride
dialkyldimethylammonium salts;
poly(N,N'-dimethyl-3,5-methylenepiperidinium) chloride; alkyl
quaternary ammonium salts; alkyldimethylbenzylammonium salts;
alkylisoquinolinium salts; dialkylmorpholinium salts;
POE-alkylamines; alkylamine salts; polyamine fatty acid
derivatives; amyl alcohol fatty acid derivatives; benzalkonium
chloride; and benzetonium chloride.
[0058] The ampholytic surfactants include imidazoline-type
ampholytic surfactants, such as
2-undecyl-N,N,N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium,
and 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium
salt; betaine-type surfactants, such as
2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine,
lauryldimethylaminoacetate betaine, alkylbetaines, amidebetaines,
and sulfobetaine.
[0059] The oleophilic nonionic surfactants include sorbitan fatty
acid esters, such as sorbitan monooleate, sorbitan monoisostearate,
sorbitan monolaurate, sorbitan monopalmitate, sorbitan
monostearate, sorbitan sesquioleate, sorbitan trioleate, diglycerol
sorbitan penta-2-ethylhexylate, and diglycerol sorbitan
tetra-2-ethylhexyl; glycerin polyglycerin fatty acids, such as
monocottonseed oil fatty acid glycerin, glycerin monoerucate,
glycerin sesquioleate, glycerin monostearate, glycerin
.alpha.,.alpha.'-oleate pyroglutamate, and glycerin monostearate
malate; propylene glycol fatty acid esters, such as propylene
glycol monostearate; hardened castor oil derivatives; and glycerin
alkyl ethers.
[0060] The hydrophilic nonionic surfactants include POE-sorbitan
fatty acid esters, such as POE-sorbitan monooleate, POE-sorbitan
monostearate, POE-sorbitan monooleate, and POE-sorbitan
tetraoleate; POE-sorbitol fatty acid esters, such as POE-sorbitol
monolaurate, POE-sorbitol monooleate, POE-sorbitol pentaoleate, and
POE-sorbitol monostearate; POE-glycerin fatty acid esters, such as
POE-glycerin monostearate, POE-glycerin monoisostearate, and
POE-glycerin triisostearate, etc., POE-monooleate; POE-fatty acid
esters, such as POE-distearate, POE-monodioleate, and ethylene
glycol distearate; POE-alkyl ethers, such as POE-lauryl ether,
POE-oleyl ether, POE-stearyl ether, POE-behenyl ether,
POE-2-octyldodecyl ether, and POE-cholestanol ether; Pulronic-type
surfactants, such as Pulronic; POE/POP-alkyl ethers, such as
POE/POP-cetyl ether, POE/POP-2-decyltetradecyl ether,
POE/POP-monobutyl ether, POE/POP-hydrogenated lanolin, and
POE/POP-glycerin ether; tetra-POE/tetra-POP-ethylenediamine
condensates, such as Tetronic; POE-(hardened) castor oil
derivatives, such as POE-castor oil, POE-hardened castor oil,
POE-hardened castor oil monoisostearate, POE-hardened castor oil
triisostearate, POE-hardened castor oil monopyroglutamate
monoisostearate diester, and POE-hardened castor oil maleate;
POE-beeswax/lanolin derivatives, such as POE-sorbitol beeswax;
alkanolamides, such as cocoyldiethanolamide,
lauroylmonoethanolamide, and fatty acid isopropanolamide;
POE-propylene glycol fatty acid esters; POE-alkylamines; POE-fatty
acid amides; sucrose fatty acid esters; alkylethoxydimethylamine
oxides; and trioleyl phosphate.
[0061] The skin washing agent of the invention may contain any
other ingredient that may be generally incorporated in ordinary
cosmetics and medicines, in addition to the above-mentioned
ingredients, within a range not detracting from the object and the
effect of the invention. The additional ingredient includes
moisturizers, powdery ingredients, liquid oils and fats, solid oils
and fats, waxes, hydrocarbon oils, higher fatty acids, higher
alcohols, synthetic ester oils, silicone oils, natural
water-soluble polymers, semisynthetic water-soluble polymers,
synthetic water-soluble polymers, tackifiers, UV absorbents, metal
ion scavengers, lower alcohols, polyalcohols, monoses,
oligosaccharides, polysaccharides, amino acids, organic amines,
polymer emulsions, pH regulators, antioxidants, antioxidation
promoters, preservatives, antiphlogistics, whitening agents,
various extracts, activators, blood circulation promoters,
antiseborrheics, and antiinflammatory agents.
[0062] Preferably in the invention, a moisturizer (e.g.,
polyalcohol such as glycerin, polyethylene glycol, propylene
glycol, 1,3-butylene glycol, hexylene glycol or the like) is
incorporated in the washing agent preferably in an amount of from
10 to 40% by mass or so, more preferably in an amount of from 20 to
35% by mass, from the viewpoint of the stability and the usability
of the preparation.
[0063] The skin washing agent of the invention may have any form of
solution, solubilizable form, emulsion, powdery dispersion,
water/oil two-layer form, water/oil/powder three-layer form or the
like.
EXAMPLES
[0064] The invention is described in more detail with reference to
the following Examples; however, the invention should not be
restricted at all by these Examples. Unless otherwise specifically
indicated, the amount is in terms of % by weight based on the
system in which the ingredient is incorporated. Because of easy use
thereof, cosmetic materials are sold in a form of aqueous
dilutions; however, the amount of the ingredient as referred to
herein is all in terms of the content of the undiluted ingredient
itself.
[0065] Prior to describing Examples, test methods and evaluation
criteria employed for evaluation in Examples are described.
1. Preparation of Samples:
[0066] Samples (face washing agents) having the composition shown
in Tables 1 to 3 below were used. The samples were produced as
follows: Glycerin was added to ion-exchanged water, and various
fatty acids were added thereto and dissolved under heat at
70.degree. C. Potassium hydroxide solution was added thereto to
neutralize it, thereby preparing a soap solution. Polymer and
surfactant were added thereto and fully stirred. The solution was
rapidly cooled to 25.degree. C. to give a creamy face washing
agent, and this preparation was tested.
[0067] In Tables 1 to 3, "DADMAC/acrylic acid copolymer" is
DADMAC/acrylic acid of 50/50 (by mass) having a mass molecular
weight of 4,500,000.
[0068] "DADMAC polymer" has a mass molecular weight of 250,000.
[0069] "DADMAC/acrylamide/acrylic acid copolymer" is
DADMAC/acrylamide/acrylic acid of 25/50/25 (by mass) having a mass
molecular weight of 4,000,000.
2. Evaluation Test Method and Evaluation:
[Foaming Speed in Washing]
[0070] The samples (face washing agents) shown in Tables 1 to 3
were tried by 10 expert panelists in a use test for the foaming
speed in washing. The evaluation criteria are as mentioned below.
The points given by the 10 panelists were averaged for the sample
evaluation.
(Evaluation Criteria)
[0071] 5: Rapid foaming.
[0072] 4: Somewhat rapid foaming.
[0073] 3: Average
[0074] 2: Somewhat slow foaming.
[0075] 1: Slow foaming.
[Quality of Foams in Washing]
[0076] The samples (face washing agents) shown in Tables 1 to 3
were tried by 10 expert panelists in a use test for the quality of
foams in washing. The evaluation criteria are as mentioned below.
The points given by the 10 panelists were averaged for the sample
evaluation.
(Evaluation Criteria)
[0077] 5: Creamy.
[0078] 4: Somewhat creamy.
[0079] 3: Average
[0080] 2: Somewhat non-creamy.
[0081] 1: Non-creamy.
[Skin Refreshed Feeling after Washing]
[0082] The samples (face washing agents) shown in Tables 1 to 3
were tried by 10 expert panelists in a use test for the skin
refreshed feeling after washing. The evaluation criteria are as
mentioned below. The points given by the 10 panelists were averaged
for the sample evaluation.
(Evaluation Criteria)
[0083] 5: Refreshed feeling given.
[0084] 4: Somewhat refreshed feeling given.
[0085] 3: Average
[0086] 2: Refreshed feeling somewhat unsatisfactory.
[0087] 1: Refreshed feeling not given.
[Moist Skin Feeling after Washing]
[0088] The samples (face washing agents) shown in Tables 1 to 3
were tried by 10 expert panelists in a use test for the moist skin
feeling after washing. The evaluation criteria are as mentioned
below. The points given by the 10 panelists were averaged for the
sample evaluation.
(Evaluation Criteria)
[0089] 5: Moist feeling given.
[0090] 4: Somewhat moist feeling given.
[0091] 3: Average
[0092] 2: Moist feeling somewhat unsatisfactory.
[0093] 1: Moist feeling not given.
[Absence of Skin Pulling Feeling after Washing]
[0094] The samples (face washing agents) shown in Tables 1 to 3
were tried by 10 expert panelists in a use test for the absence of
skin pulling feeling after washing. The evaluation criteria are as
mentioned below. The points given by the 10 panelists were averaged
for the sample evaluation.
(Evaluation Criteria)
[0095] 5: No skin pulling feeling given.
[0096] 4: Skin pulling feeling not given in some degree.
[0097] 3: Average
[0098] 2: Skin pulling feeling given in some degree.
[0099] 1: Skin pulling feeling given.
[Change in Moisture Content of Skin after Washing]
[0100] Regarding the moisture content of skin after washed with any
of the samples (face washing agents) shown in Tables 1 to 3, the
moisture content of skin was measured respectively before washing
and in 30 minutes after washing, and the sample was evaluated based
on the skin moisture content change. The moisture content was
measured with Corneometer CM825 (Courage+.Khazaka, Germany). The
evaluation criteria are as mentioned below.
(Evaluation Criteria)
[0101] .largecircle.: (skin moisture content after washing)-(skin
moisture content before washing).gtoreq.0.
[0102] x: (skin moisture content after washing)-(skin moisture
content before washing)<0.
Examples 1 and 2, Comparative Examples 1 to 11
[0103] The samples shown in Table 1 below were tested and evaluated
for the foaming speed, the quality of foams, the feeling after
washing (refreshed feeling, moist feeling, no skin pulling feeling)
and for the skin moisture content change, according to the
above-mentioned evaluation methods. The results are shown in Table
1.
TABLE-US-00001 TABLE 1 Example Comparative Example 1 2 1 2 3 4 5 6
7 8 9 10 11 Glycerin 30 30 30 30 30 30 30 30 30 30 30 30 30 Lauric
Acid 4 4 4 4 4 4 4 4 4 -- 4 4 4 Myristic Acid 10 10 10 10 10 10 10
10 10 -- 10 10 10 Stearic Acid 12 12 12 12 12 12 12 12 12 -- 12 12
12 Potassium Hydroxide 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 -- 4.8
4.8 4.8 Polyglyceryl(4) Lauryl Ether 3 3 -- 3 -- -- 3 3 -- 3 -- 3 3
DADMAC/Acrylic Acid Copolymer 0.3 0.3 -- -- 0.3 -- 0.3 -- 0.3 0.3
-- 0.3 0.3 Acylmethyltaurine Sodium 1.5 -- -- -- -- 1.5 -- 1.5 1.5
20 -- -- -- Hydroxy Ether Sodium Carboxylate -- 1.5 -- -- -- -- --
-- -- -- -- -- -- Imidazolinium Betaine -- -- -- -- -- -- -- -- --
-- 4 4 -- Sodium Lauroylglutamate -- -- -- -- -- -- -- -- -- -- --
-- 4 Ion-Exchanged Water bal. bal. bal. bal. bal. bal. bal. bal.
bal. bal. bal. bal. bal. Foaming Speed 4.8 5 2.8 2.6 2.6 3.6 2.8
3.6 3.6 3.2 2.6 2.8 2.8 Quality of Foams in Washing 5 4.8 2.4 2.6
2.6 2.4 3.2 2.8 3.2 2.6 3.6 3.2 3.2 (creaminess) Refreshed Feeling
after Washing 4.8 4.8 4.8 4.8 4.8 4.6 4.6 4.2 4.2 1.8 4.2 4 4.2
Moist Feeling after Washing 4.8 4.8 1.8 2.2 2.8 3 2.8 3.8 2.8 3.4
3.2 2.8 3 No Skin Pulling Feeling after 4.8 4.8 1.8 2.4 3 3 2.8 3.8
2.8 4.2 2.6 2.6 2.6 Washing Skin Moisture Content Change
.smallcircle. .smallcircle. x x x x x x x .smallcircle. x x x
[0104] As shown in the results in Table 1, the face washing agent
of Comparative Example 1 not containing the indispensable
ingredients of the invention except component (a) was inferior in
that, in washing, the foaming speed was low and the foams were not
creamy; and after washing, the face washing agent could not give a
skin moist feeling but gave a skin pulling feeling. On the other
hand, the sample of Comparative Example 2 containing component (a)
and component (c) and the sample of Comparative Example 3
containing component (a) and component (b) were improved in some
degree in point of the foaming speed, the creaminess of foams, the
moist feeling and the absence of skin pulling feeling; however, it
could not be said that these effects would be sufficient.
[0105] As opposed to these, it has been clarified that the face
washing agents of Examples 1 to 2 containing components (a) to (d)
were significantly improved in point of the foaming speed and the
creaminess of foams in washing and in point of the skin refreshed
feeling, the moist feeling and the absence of skin pulling feeling
after washing and that these face washing agents did not lower the
skin moisture content.
[0106] However, as in Comparative Examples 5 to 8, these effects
significantly reduced when any one of component (a), component (b),
component (c) and component (d) was not included in the
compositions. As in Comparative Examples 9 and 10, where an
ampholytic surfactant such as imidazolium betaine or a
glutamate-type surfactant such as sodium lauroylglutamate was
incorporated in the system that contains components (a) to (c), in
place of component (d) therein, the compositions could not exhibit
the effects of the invention.
Examples 3 to 13, Comparative Example 12
[0107] The samples shown in Table 2 below were tested and evaluated
for the foaming speed, the quality of foams, the feeling after
washing (refreshed feeling, moist feeling, no skin pulling feeling)
and for the skin moisture content, according to the above-mentioned
evaluation methods. The results are shown in Table 2.
TABLE-US-00002 TABLE 2 Comp. Example Ex. 3 4 5 6 7 8 9 10 11 12 13
12 Glycerin 30 30 30 30 30 30 30 30 30 30 30 30 Lauric Acid 4 4 4 4
4 4 4 4 4 4 4 4 Myristic Acid 10 10 10 10 10 10 10 10 10 10 10 10
Stearic Acid 12 12 12 12 12 12 12 12 12 12 12 12 Potassium
Hydroxide 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8
Polyglyceryl(4) Lauryl Ether 3 -- -- -- -- -- -- -- -- 3 3 3
Polyglyceryl(4) Stearyl Ether -- 3 -- -- -- -- -- -- -- -- -- --
Polyglyceryl(4) Arachyl Ether -- -- 3 -- -- -- -- -- -- -- -- --
Polyglyceryl(4) Octyl Ether -- -- -- 3 -- -- -- -- -- -- -- --
Polyglyceryl(6) Hexyl Ether -- -- -- -- 3 -- -- -- -- -- -- --
Polyglyceryl(3) Lauryl Ether -- -- -- -- -- 3 -- -- -- -- -- --
Polyglyceryl(10) Lauryl Ether -- -- -- -- -- -- 3 -- -- -- -- --
Polyglyceryl(20) Lauryl Ether -- -- -- -- -- -- -- 3 -- -- -- --
Polyglyceryl(25) Lauryl Ether -- -- -- -- -- -- -- -- 3 -- -- --
Polyglyceryl(2) Lauryl Ether -- -- -- -- -- -- -- -- -- -- -- 3
DADMAC/Acrylic Acid Copolymer 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
-- -- 0.3 DADMAC Polymer -- -- -- -- -- -- -- -- -- 0.3 -- --
DADMAC/Acrylamide/Acrylic Acid -- -- -- -- -- -- -- -- -- -- 0.3 --
Copolymer Acylmethyltaurine Sodium 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
1.5 1.5 1.5 1.5 Ion-Exchanged Water bal. bal. bal. bal. bal. bal.
bal. bal. bal. bal. bal. bal. Foaming Speed 4.8 4.6 4.4 4.8 4.8 4.4
4.8 4.8 4.8 4.8 4.8 3.6 Quality of Foams in Washing 5 5 5 5 4.4 4.6
5 5 5 5 5 3.6 (creaminess) Refreshed Feeling after Washing 4.8 4.8
4.8 4.8 4.8 4.6 4.8 4.8 4.8 4.8 4.8 4.2 Moist Feeling after Washing
4.8 4.6 4.6 4.8 4.8 4.6 4.8 4.8 4.8 4.6 4.6 3.8 No Skin Pulling
Feeling after 4.8 4.8 4.8 4.8 4.6 4.6 4.8 4.6 4.2 4.6 4.6 3.8
Washing Skin Moisture Content Change .smallcircle. .smallcircle.
.smallcircle. .smallcircle. .smallcircle. .smallcircle.
.smallcircle. .smallcircle. .smallcircle. .smallcircle.
.smallcircle. x
[0108] As shown in the results in Table 2, the samples in which the
alkyl group in component (c) is from hexyl having 6 carbon atoms to
arachyl having 20 carbon atoms exhibited excellent effects of
improvement. Above all, it has been confirmed that the samples in
which the group has at least 8 more carbon atoms exhibited a
noticeably excellent effect of improving the creaminess of foams
that and the samples in which the group has at most 16 carbon atoms
exhibited a noticeably excellent effect of improving the foaming
speed.
[0109] The degree of polymerization of polyglycerin in component
(c) was varied from 2 to 25. As in Comparative Example 12, the
sample could not exhibit the effects of the invention when the
degree of polymerization was 2; and it has been confirmed that the
effects of the invention could be attained only when the degree of
polymerization is at least 3.
Examples 14 to 21
[0110] The samples shown in Table 3 below were tested and evaluated
for the foaming speed, the quality of foams, the feeling after
washing (refreshed feeling, moist feeling, no skin pulling feeling)
and for the skin moisture content, according to the above-mentioned
evaluation methods. The results are shown in Table 3.
TABLE-US-00003 TABLE 3 Example 14 15 16 17 18 19 20 21 Glycerin 30
30 30 30 30 30 30 30 Lauric Acid 4 4 4 4 4 4 4 4 Myristic Acid 10
10 10 10 10 10 10 10 Stearic Acid 12 12 12 12 12 12 12 12 Potassium
Hydroxide 4.8 4.8 4.8 4.8 4.8 4.8 4.8 4.8 Polyglyceryl(4) Lauryl
Ether 0.05 0.1 2 5 3 3 3 3 DADMAC/Acrylic Acid Copolymer 0.3 0.3
0.3 0.3 0.05 1 5 10 Acylmethyltaurine Sodium 1.5 1.5 1.5 1.5 1.5
1.5 1.5 1.5 Ion-Exchanged Water bal. bal. bal. bal. bal. bal. bal.
bal. Foaming Speed 4.2 4.6 4.8 4.8 4.8 4.6 4.4 4 Quality of Foams
in Washing 4.4 5 5 5 4.4 5 5 5 (creaminess) Refreshed Feeling after
Washing 4.2 4.8 4.8 4.8 4.8 4.8 4.8 4.8 Moist Feeling after Washing
4.2 4.6 4.6 4.8 4.8 4.8 4.8 4.8 No Skin Pulling Feeling after 4.4
4.8 4.8 4.8 4.6 4.8 4.6 4.6 Washing Skin Moisture Content Change
.smallcircle. .smallcircle. .smallcircle. .smallcircle.
.smallcircle. .smallcircle. .smallcircle. .smallcircle.
[0111] Formulation Examples are shown below.
Example 22
Face Washing Agent
TABLE-US-00004 [0112] (Constituents) (% by mass) (1) Glycerin 15.0
(2) Polyethylene Glycol 400 5.0 (3) Lauric Acid 5.0 (4) Myristic
Acid 10.0 (5) Palmitic Acid 10.0 (6) Stearic Acid 15.0 (7)
Lauroylmethyltaurine Sodium 5.0 (8) Fatty Acid Monoglyceride 1.0
(9) Polyglyceryl(4) Lauryl Ether 2.0 (10) DADMAC/Acrylamide
Copolymer 1.0 (11) Potassium Hydroxide 6.0 (12) Ion-Exchanged Water
bal. (13) Chelating Agent q.s. (14) Fragrance q.s.
(Production Method)
[0113] (1) to (8) were added to (12), heated at 75.degree. C., and
dissolved. After dissolution, this was neutralized with (11), and
subsequently, (10) and (9), (13) and (14) were added thereto and
fully stirred, and thereafter cooled to give the present
product.
[0114] The face washing agent of Example 22 was excellent in the
foaming speed and the creaminess of foams in washing, and in the
refreshed feeling, the moist feeling and the absence of skin
pulling feeling after washing, and gave no skin moisture content
change before and after washing.
Example 23
Body Shampoo
TABLE-US-00005 [0115] (Constituents) (% by mass) (1) Glycerin 15.0
(2) Polyethylene Glycol 1500 5.0 (3) Lauric Acid 2.0 (4) Myristic
Acid 5.0 (5) Palmitic Acid 5.0 (6) Stearic Acid 7.0 (7)
Lauroylmethyltaurine Sodium 5.0 (8) Lauryl Glycol Sodium Acetate
1.0 (9) Potassium Hydroxide 3.0 (10) Polyglyceryl(10) Lauryl Ether
3.0 (11) DADMAC Polymer 1.0 (12) Ion-Exchanged Water bal. (13)
Fragrance q.s.
(Production Method)
[0116] (1) to (6) were added to (12), heated at 75.degree. C., and
dissolved. After dissolution, this was neutralized with (9), and
subsequently, (11) and (7), (8), (10) and (13) were added thereto
and fully stirred, and thereafter cooled to give the present
product.
[0117] The body shampoo of Example 23 was excellent in the foaming
speed and the creaminess of foams in washing, and in the refreshed
feeling, the moist feeling and the absence of skin pulling feeling
after washing, and gave no skin moisture content change before and
after washing.
INDUSTRIAL APPLICABILITY
[0118] The foamable skin washing agent of the invention has the
advantages of detergency, rapid foamability in washing, excellent
creaminess of foams, impartation of no skin pulling feeling after
washing, impartation of moist feeling to skin and no influence of
reducing the skin moisture content, which are remarkably more
excellent than those of conventional washing agents.
* * * * *