JP2007146064A - Gel composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gel composition excellent in moisturizing effect and keratin softening effect, having good texture familiar to skin and free from stickiness feeling by using a water-soluble thickener composed of an acrylamide alkylsulfonic acid-based copolymer. <P>SOLUTION: The gel composition comprises (A) a water-soluble thickener obtained by copolymerizing an acrylic acid and/or its salt or an acrylic acid derivative with acrylamide alkylsulfonic acid and/or its salt, or a water-soluble thickener obtained by further neutralizing the resultant copolymer with an alkali and (B) one or more kinds of specific polyglycerol fatty acid esters having high esterification degree. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a gel composition containing a water-soluble thickener comprising an acrylamide alkyl sulfonic acid copolymer and a specific polyglycerin fatty acid ester. The gel composition of the present invention can be used in a wide range of fields including quasi-drugs and cosmetics, and is particularly suitably used as a skin cosmetic.

  As a water-soluble thickener that has acid resistance and salt resistance and does not produce a sticky feel, a water-soluble thickener composed of an acrylamide alkyl sulfonic acid copolymer is used as a thickener for various cosmetics. .

  Especially, the water-soluble thickener which consists of a copolymer of acrylic acid and / or its salt, and acrylamide alkylsulfonic acid and / or its salt, or the water solution obtained by further neutralizing the copolymer with an alkali agent The thickener is used in many cosmetics because of its excellent compatibility with various water-soluble polyhydric alcohols (Patent Document 1).

JP-A-9-157130

  However, if a sufficient amount of water-soluble polyhydric alcohol such as glycerin or butylene glycol is added to the above-mentioned water-soluble thickener to give a high moisturizing effect, the moisturizing effect is provided, but on the other hand The problem was that it would cause a bad feeling and a sticky feel. On the other hand, when care is taken not to cause poor skin fit and stickiness, the amount of water-soluble polyhydric alcohol to be added to the water-soluble thickener is limited, and it is difficult to provide a sufficient moisturizing effect. there were.

  In view of such circumstances, the present inventors have conducted extensive research to search for a gel composition having an excellent moisturizing effect and a good skin-fitting feel. As a result, the water-soluble thickener and a specific polyglycerin have been obtained. In addition to finding out that a gel composition characterized by containing a fatty acid ester solves the above problems, it has also been found that a keratin softening effect can be imparted, and the present invention has been completed.

（１）
ｎ≧０、Ｒは脂肪酸残基又はＨを表す。
エステル化度：脂肪酸残基の数／Ｒの数が０．６０以上である。 That is, the present invention relates to (A) a water-soluble thickener obtained by copolymerizing acrylic acid and / or a salt thereof or an acrylic acid derivative, and acrylamide alkylsulfonic acid and / or a salt thereof, or the obtained copolymer. A water-soluble thickener obtained by further neutralizing the polymer with an alkali agent;
(B) The gel composition characterized by containing the polyglycerol fatty acid ester represented by following General formula (1) by 1 type (s) or 2 or more types.

(1)
n ≧ 0, R represents a fatty acid residue or H.
Degree of esterification: number of fatty acid residues / number of R is 0.60 or more.

  The present invention also provides the gel composition, wherein the acrylic acid derivative is one or more of acrylamide, alkyl acrylate, hydroxyalkyl acrylate, and aminoalkyl acrylate. is there.

  Furthermore, the present invention provides the gel composition described above, wherein the polyglycerol fatty acid ester is liquid at 37 ° C.

  Moreover, this invention provides said gel composition characterized by content of the said water-soluble thickener being 0.01 mass% or more with respect to gel composition whole quantity.

  Furthermore, this invention provides said gel composition characterized by content of the said polyglycerol fatty acid ester being 0.01 mass% or more and 30.0 mass% or less with respect to gel composition whole quantity. Is.

  The gel composition of the present invention is excellent in moisturizing effect and keratin softening effect, has a good skin-fitting feel, and does not give a sticky feeling. Therefore, it can be particularly preferably used as a skin cosmetic.

  Hereinafter, the present invention will be described in detail.

  In the present invention, the copolymer used as the water-soluble thickener is obtained by copolymerizing acrylic acid and / or a salt or acrylic acid derivative thereof with acrylamide alkylsulfonic acid and / or a salt thereof. Even if this copolymer is bridge | crosslinked by the crosslinkable monomer, it is preferable.

  The acrylamide alkyl sulfonic acid may be used as a salt thereof, or the salt may be used alone or in combination with acrylamide alkyl sulfonic acid. Moreover, it is good also as a water-soluble thickener used for this invention by neutralizing the acrylamide alkylsulfonic acid unit of the copolymer obtained with an alkali agent.

  As the salt of acrylamide alkyl sulfonic acid, for example, an organic amine salt such as alkali metal, ammonia, trimethylamine, triethanolamine or the like can be used. Similarly, as the salt of acrylic acid, an organic amine salt such as alkali metal, ammonia, trimethylamine, or triethanolamine can be used. As the acrylic acid derivative, acrylamide, alkyl acrylate, hydroxyalkyl acrylate, aminoalkyl acrylate, or the like can be used.

As a polymerization method for copolymerization, polymerization may be performed by a known polymerization method such as a solution polymerization method, an emulsion polymerization method, or a bulk polymerization method.
The polymerization initiator is not particularly limited as long as it has the ability to initiate radical polymerization, and examples thereof include benzoyl peroxide, azobisisobutyronitrile, potassium persulfate, and ammonium persulfate.
In addition, the copolymer obtained by said method may also contain the unit which consists of another vinyl monomer other than an acrylic acid unit or an acrylic acid derivative, and an acrylamide alkylsulfonic acid unit.

When the water-soluble thickener used in the present invention is a cross-linked copolymer, the cross-linkable monomer has at least two polymerizable double bonds in one molecule, and acrylic acid or its It is essential that the salt or acrylic acid derivative and the acrylamidoalkylsulfonic acid or a salt thereof or a reaction solvent in which the salt is dissolved are dissolved in the reaction solvent and have good copolymerizability and can take a crosslinked structure efficiently.
Such crosslinkable monomers include ethylene glycol diacrylate, ethylene glycol methacrylate, diethylene glycol acrylate, diethylene glycol dimethacrylate, trimethylolpropane triacrylate, N, N'-methylenebisacrylamide, N, N'-ethylenebisacrylamide. One or two or more selected from triallyl isocyanurate, pentaerythritol dimethacrylate, and the like can be used.

The content of acrylic acid and / or salt or acrylic acid derivative of the copolymer which is a water-soluble thickener is 45 to 90 mol%, and the content of acrylamidoalkylsulfonic acid and / or salt thereof is 10 to 55 mol% is preferred.
The amount of the crosslinkable monomer used is preferably 0.001 to 2.0 mol% based on the total number of moles of acrylic acid and / or salt or acrylic acid derivative, and acrylamide alkylsulfonic acid and / or salt thereof. .
The obtained water-soluble thickener has a molecular weight of 100,000 to 5,000,000, and is adjusted according to the crosslinking agent to be added and the required viscosity.

  The water-soluble thickener preferably used in the present invention is a copolymer disclosed in JP-A-9-157130 and JP-A-2004-43785. In particular, (Na acrylate / acryloyl dimethyl taurine Na) copolymer is preferred. As a commercial product, Simulgel EG (SEPPIC) can be used.

  The gel composition of the present invention is produced by blending one or more of the above water-soluble thickeners, and the preferred blending amount is 0.01 to 10% by mass with respect to the total gel composition. And more preferably 0.1 to 5% by mass.

（１）
ｎ≧０、Ｒは脂肪酸残基又はＨを表す。
エステル化度：脂肪酸残基の数／Ｒの数が０．６０以上である。 Next, the polyglycerol fatty acid ester used in the present invention is a polyglycerol fatty acid ester represented by the following general formula (1).

(1)
n ≧ 0, R represents a fatty acid residue or H.
Degree of esterification: number of fatty acid residues / number of R is 0.60 or more.

  The compound of the general formula (1) is a polyglycerol fatty acid ester having a high degree of esterification and a number of fatty acid residues / R number of 0.60 or more. The fatty acid constituting the ester is a linear saturated fatty acid, a linear unsaturated fatty acid, a branched unsaturated fatty acid, a branched unsaturated fatty acid, or the like. For example, octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, isostearic acid, linoleic acid, oleic acid, erucic acid, palm fatty acid, palm kernel oil fatty acid, nuka oil fatty acid, soybean oil fatty acid, macadamia nut oil fatty acid, etc. it can. In addition, as for the kind of fatty acid which comprises polyglycerol fatty acid ester, all the fatty acids in a molecule | numerator may be the same, and a different fatty acid may be sufficient. Although it is possible to take an ester with any fatty acid, it is preferable that the polyglycerol fatty acid ester is finally designed to be liquid at 37 ° C. In the present invention, decaglyceryl decaisostearate is most preferred.

  The gel composition of the present invention is produced by blending one or more of the above polyglycerin fatty acid esters. As a preferable compounding quantity, it is 0.01-30 mass% with respect to the gel composition whole quantity, More preferably, it is 0.1-10 mass%.

  The gel composition of the present invention exhibits a moisturizing effect by the above essential components, and it is not necessary to blend other moisturizing components substantially, but it is also possible to blend a water-soluble polyhydric alcohol. For example, ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, pentamethylene glycol, 2- Divalent alcohols such as butene-1,4-diol, hexylene glycol, octylene glycol, trivalent alcohols such as glycerin, trimethylolpropane, 1,2,6-hexanetriol, and tetravalent alcohols such as pentaerythritol. Pentavalent alcohols such as alcohol and xylitol, hexavalent alcohols such as sorbitol and mannitol, diethylene glycol, dipropylene glycol, polyethylene glycol, polypropylene glycol, tetraethylene glycol, diglycerin, polyethylene Polyol alcohol polymer such as recall, triglycerin, tetraglycerin, polyglycerin, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono 2 -Divalent alcohol alkyl ethers such as methyl hexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether , Diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol butyl ether, diethylene glycol methyl ethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene Dihydric alcohol alkyl ethers such as glycol isopropyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol butyl ether, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl Ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol diazinate, ethylene glycol disuccinate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether Divalent alcohol ether esters such as acetate, propylene glycol monopropyl ether acetate, propylene glycol monophenyl ether acetate, glycerin monoalkyl ethers such as xyl alcohol, ceralkyl alcohol, batyl alcohol, sorbitol, maltitol, maltotriose, manni Sugar, sucrose, erythritol, glucose, fructose, amylolytic sugar, maltose, xylitol, amylolytic sugar reducing alcohol, glycolide, tetrahydrofurfuryl alcohol, POE tetrahydrofurfuryl alcohol, POP butyl ether, POP POE butyl ether, tripolyoxypropylene glycerin ether, POP glycerin ether, POP glycerin ether phosphoric acid, POP POE pentane erythritol ether are mentioned, and arbitrary 1 type (s) or 2 or more types are mix | blended.

  In addition, as oil which comprises the oil phase of the gel composition of this invention, the following oils can be mentioned other than the said polyglycerol fatty acid ester. Avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, flaxseed oil, safflower oil, Liquid oils such as cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnagiri oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin, trioctanoic acid glycerin, triisopalmitic acid glycerin , Cacao butter, palm oil, horse tallow, hydrogenated palm oil, palm oil, beef tallow, sheep fat, hydrogenated beef tallow, palm kernel oil, pork tallow, beef bone fat, owl kernel oil, hydrogenated oil, cow leg fat, marrow, cured Solid fats such as castor oil, beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nukarou, ranoli , Kapok wax, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, jojoballow, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether and other waxes, liquid paraffin, ozokerite, squalene, pristane, ceresin, squalane, petrolatum, microcrystalline wax, and other hydrocarbons, fatty acid oils, alcohols, cetyl octanoate, isopropyl myristate, and other esters It is a commonly used oil component such as oil.

  In addition to the above-described constituent components, other components can be blended in the gel composition of the present invention within a quantitative and qualitative range that does not impair the effects of the present invention, depending on the purpose. For example, when it is used as a cosmetic, it is also possible to mix cosmetic ingredients such as ultraviolet absorbers, antioxidants, antiseptics, anti-inflammatory agents, drugs such as vitamins and hormones, and fragrances.

  Although the use of the gel composition of the present invention is not limited, it is preferably used as a cosmetic. Particularly preferred is a skin cosmetic. The dosage form of the skin cosmetic is arbitrary and may be any of a solubilization system, an emulsification system, a powder dispersion system, an oil-water two-layer system, and an oil-water-powder three-layer system. In the case of an emulsification system, either the water-in-oil type or the oil-in-water type can be used as an emulsification type, but it is desirable to prepare so as not to lose the effect of the present invention.

  Next, the present invention will be described more specifically with reference to examples. The present invention is not limited only to the following examples. “Mass%” means mass% based on the total amount of the gel composition. First, evaluation methods of Examples and Comparative Examples will be described.

"Moisturizing effect test"
After washing the forearm of 25 healthy women, apply the sample, and use SKICON 200 (manufactured by IBS Co., Ltd.) to measure the amount of horny water (conductance value) before the test and after 3 hours of application. The measurement and the rate of change were calculated according to the following formula, and the moisturizing effect was evaluated.
Conductance change rate = conductance change amount / conductance value before sample application <criteria>
Remarkable: Conductance change rate exceeding 10% Effective: Conductance change rate exceeding 3% and less than 10% Slightly effective: Conductance change rate exceeding 0% and less than 3% Invalid: Conductance change rate 0% <Evaluation criteria>
◎: More than 15 out of 25 people judged to be effective or effective ○: 10 to less than 15 out of 25 people judged to be effective or effective △: 5 to 25 out of 25 people judged to be effective Or judged as effective ×: Less than 5 out of 25 people judged as effective or effective

"Keratin softness effect test"
The stratum corneum collected from the back of the guinea pig by heat-trypsin treatment was used as a 2 × 30 mm slice. This is set in a continuous dynamic viscoelasticity measuring device (Toyo Seiki, manufactured by Shiseido Kyosha Co., Ltd.), the elastic modulus is measured three times over time every 3 minutes, and the average is the measured value of the elastic modulus before applying the test solution. It was. Next, 2 μl of the test solution was applied onto the stratum corneum, spread to 3 to 4 mm width, measured in the same manner for 2 hours, and the keratin softening effect was evaluated by the ratio to the elastic modulus before application of the test solution.
<Evaluation criteria>
◎: Elastic modulus ratio is less than 0.85 ○: Elastic modulus ratio is 0.85 or more and less than 0.95 Δ: Elastic modulus ratio is 0.95 or more and less than 1.00 ×: Elastic modulus ratio is 1.00 or more

"Usage feeling test"
The gel was applied to the forearms of 25 healthy women, and the feeling of use (goodness of skin familiarity and non-stickiness) associated with the application was evaluated according to the following criteria to determine the feeling of use of the gel composition.
<Criteria>
Good skin familiarity ◎: More than 20 out of 25 people recognized skin-friendly ○: 15 or more of 25 people less than 20 recognized good skin fit △: 10 or more of 25 people less than 15 ×: 25 out of 25 people recognized that the skin was familiar

No stickiness ◎: More than 20 out of 25 people recognized no stickiness ○: 15 or more of 25 people less than 20 people recognized no stickiness △: 10 or more of 25 people less than 15 people No sticky feeling ×: Less than 10 out of 25 people recognized no sticky feeling

Next, the composition and production method of the water-soluble thickener used in Examples and Comparative Examples will be described. The production method is as follows.
The water-soluble thickeners (A) to (D) are produced by dissolving acrylic acid and / or a salt thereof or an acrylic acid derivative (corresponding to 25.7 mol%) in an appropriate amount of pure water, and then adding acrylamide alkyl sulfonic acid thereto. And / or a salt thereof (equivalent to 73.1 mol%), and after cooling, a crosslinkable monomer (N, N′-methylenebisacrylamide: equivalent to 0.5 mol%) is dissolved, and a polymerization initiator is dissolved therein. (Potassium persulfate: appropriate amount) is dissolved. On the other hand, 2 g of sorbitan monostearate is added to 400 ml of n-hexane, heated to 35 ° C. and dissolved under a nitrogen stream, and then the above aqueous solution is gradually added and emulsified with stirring. After heating to 60 ° C. and reacting for 6 hours, the mixture is cooled to room temperature and the oil phase is removed by decantation. The aqueous phase is washed several times with 200 ml of n-hexane, and the precipitate is collected, and then dried under vacuum to obtain a copolymer which is a target water-soluble thickener.

<Water-soluble thickener (A)>
Composition: Sodium acrylate / 2-acrylamido-2-methylpropanesulfonic acid copolymer <Water-soluble thickener (B)>
Composition: acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer <water-soluble thickener (C)>
Composition: ammonium acrylate / 2-acrylamido-2-methylpropanesulfonic acid copolymer <water-soluble thickener (D)>
Composition: Acrylamide / 2-acrylamido-2-methylpropanesulfonic acid copolymer

Next, the composition and trade name of the polyglycerin fatty acid ester used in Examples and Comparative Examples are described.
<Polyglycerin fatty acid ester (A)>
Composition: Decaisostearate decaglyceryl (degree of esterification 0.83)
Product name: NIKKOL Decaglyn 10-IS manufactured by Nikko Chemicals
<Polyglycerin fatty acid ester (B)>
Composition: Decaglyceryl pentaoleate (degree of esterification 0.42)
Product name: NIKKOL Decaglyn 5-OV manufactured by Nikko Chemicals
<Polyglycerin fatty acid ester (C)>
Composition: hexaglyceryl pentaoleate (degree of esterification 0.63)
Product name: NIKKOL Hexaglyn 5-O manufactured by Nikko Chemicals
<Polyglycerin fatty acid ester (D)>
Composition: Tetraglyceryl pentaoleate (degree of esterification 0.83)
Product name: NIKKOL Tetraglyn 5-O manufactured by Nikko Chemicals
<Polyglycerin fatty acid ester (E)>
Composition: Diglyceryl triisostearate (degree of esterification 0.75)
Product name: NIKKOL DGTIS manufactured by Nikko Chemicals

[Table 1] to [Table 3] show the formulations of Examples 1 to 8 and Comparative Examples 1 to 5 and their evaluation results. From these results, it can be seen that the gel composition of the present invention has an excellent moisturizing effect and keratin softening effect, has a good skin-fitting feel, and does not produce a sticky feeling. In addition, the manufacturing method of Examples 1-8 and Comparative Examples 1-5 is as follows.
<The manufacturing method of Examples 1-8>
Aqueous phase in which (10) and moisturizers (2) and (3) are added to purified water (11), and the water-soluble thickener (1) is completely dissolved by adding moisturizer (4) that has been melted by heating. And after adjusting the oil phase which heat-dissolved (5)-(9) to 70 degreeC, an oil phase is added to a water phase and preliminary emulsification is performed. After homogenizing the emulsified particles with a homomixer, the mixture was degassed, filtered and cooled to obtain the desired gel composition.
<The manufacturing method of Comparative Examples 1-5>
The basic production method conforms to the production methods of Examples 1 to 8, but is used in Comparative Examples 1 to 5 (2), (3), (5), (11), (12), (15) (2) is pre-dispersed and dissolved in a part of purified water, then neutralized by adding (15) and added to the aqueous phase, (3) is wetted to (5) Addition of the aqueous phase, in either case, confirmation of dissolution in the aqueous phase before the preliminary emulsification step, and (11) and (12) include heating and dissolution after the addition of the oil phase.

[Table 1]
Example 1 Example 2 Example 3 Example 4
(1) Water-soluble thickener (A) 0.01 0.1 5.0 10.0
(2) Glycerin 10.0 10.0 10.0 10.0
(3) 1,3-butylene glycol 8.0 8.0 8.0 8.0
(4) Polyethylene glycol 1500 3.0 3.0 3.0 3.0
(5) Squalane 5.0 5.0 5.0 5.0
(6) Tetraoctanoic acid pentaerythryl 3.0 3.0 3.0 3.0
(7) POE (15 mol)
Oleyl ether 2.0 2.0 2.0 2.0
(8) Polyglycerin fatty acid ester (A) 5.0 5.0 5.0 5.0
(9) Phenoxyethanol Appropriate Appropriate Appropriate Appropriate Appropriate Appropriate (10) Trisodium edetate Appropriate Appropriate Appropriate Appropriate Appropriate (11) Purified Water Residual Residue Residual Residual Residue ―――――――――――――
Moisturizing effect ○ ○ ◎ ◎
Keratin softening effect ○ ◎ ◎ ◎
Usability evaluation Good skin familiarity ○ ◎ ◎ ○
No stickiness ○ ◎ ◎ ○

[Table 2]
Example 5 Example 6 Example 7 Example 8
(1) Water-soluble thickener (A) 3.0 3.0 3.0 3.0
(2) Glycerin 10.0 10.0 10.0 10.0
(3) 1,3-butylene glycol 8.0 8.0 8.0 8.0
(4) Polyethylene glycol 1500 3.0 3.0 3.0 3.0
(5) Squalane 5.0 5.0 5.0 5.0
(6) Tetraoctanoic acid pentaerythryl 3.0 3.0 3.0 3.0
(7) POE (15 mol)
Oleyl ether 2.0 2.0 2.0 2.0
(8) Polyglycerol fatty acid ester (A) 0.01 0.1 10.0 30.0
(9) Phenoxyethanol Appropriate Appropriate Appropriate Appropriate Appropriate Appropriate (10) Trisodium edetate Appropriate Appropriate Appropriate Appropriate Appropriate (11) Purified Water Residual Residue Residual Residual Residue ―――――――――――――
Moisturizing effect ○ ◎ ◎ ◎
Keratin softening effect ○ ○ ◎ ◎
Usability evaluation Good skin familiarity ○ ◎ ◎ ○
No stickiness ○ ◎ ◎ ○

[Table 3]
Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5
(1) Water-soluble thickener (A) 3.0 3.0 3.0 − −
(2) Carboxyvinyl polymer--1.5-
(Noveon Carbopol 940)
(3) Xanthan gum----1.5
(CP Kelco Keltrol)
(4) Glycerin 10.0 10.0 10.0 10.0 10.0
(5) 1,3-butylene glycol 8.0 8.0 8.0 8.0 8.0
(6) Polyethylene glycol 1500 3.0 3.0 3.0 3.0 3.0
(7) Squalane 5.0 5.0 5.0 5.0 5.0
(8) Tetraoctanoic acid pentaerythryl 3.0 3.0 3.0 3.0 3.0
(9) POE (15 mol)
Oleyl ether 2.0 2.0 2.0 2.0 2.0
(10) Polyglycerol fatty acid ester (A) − − − 5.0 5.0
(11) Cholesteryl 12-hydroxystearate 5.0 0.05 − − −
(12) Polyglycerin fatty acid ester (B) − − 5.0 − −
(13) Phenoxyethanol Appropriate amount Appropriate amount Appropriate amount Appropriate amount (14) Trisodium edetate Appropriate amount Appropriate amount Appropriate amount Appropriate amount (15) Potassium hydroxide--Appropriate amount--
(16) Purified water Residue Residue Residue Residue Residue Residue ――――――――――――――――――――――――――――――――――――――――
Moisturizing effect ◎ △ ○ ◎ ◎
Keratin softening effect ◎ △ △ ◎ ◎
Usability evaluation Skin familiarity × △ △ × ×
No stickiness × ○ △ × ×

  In Examples 9 to 11 shown below, as in Examples 1 to 8, gel compositions that were excellent in moisturizing effect and keratin softening effect, had a good skin-fitting feel, and did not produce a sticky feeling were obtained. In each example, the aqueous phase and the oil phase were dissolved, adjusted to 70 ° C., the oil phase was added to the aqueous phase and pre-emulsified, and then the emulsified particles were homogenized with a homomixer, degassed, filtered and cooled to obtain the target. A gel composition was obtained.

Example 9
Water-soluble thickener (B) 2.0
Ethyl alcohol 5.0
Glycerin 5.0
Vaseline 0.5
Beeswax 1.3
Isohexadecane 5.0
Dimethylpolysiloxane 10cs 1.0
Macadamia nut oil 3.2
Jojoba oil 1.4
Stearic acid 0.5
Isostearic acid 0.3
Behenic acid 0.2
Diglyceryl diisostearate1.0
Polyglycerin fatty acid ester (C) 1.0
Phenoxyethanol appropriate amount trisodium edetate appropriate amount potassium hydroxide appropriate amount purified water remaining

Example 10
Water-soluble thickener (C) 4.0
Glycerin 7.0
Dipropylene glycol 4.0
Microcrystalline wax 1.3
Cetanol 0.5
Stearyl alcohol 0.5
Liquid paraffin 4.0
Palm kernel oil 1.4
Avocado oil 12.0
Palm fatty acid sorbitan 1.6
Sorbitan trioleate 0.8
Polyglycerin fatty acid ester (D) 1.0
Phenoxyethanol appropriate amount edetate trisodium appropriate amount perfume appropriate amount purified water remainder

Example 11
Water-soluble thickener (D) 0.5
Propylene glycol 10.0
Bentonite 0.5
Liquid paraffin 8.0
Liquid lanolin 2.0
Stearic acid 2.2
Isohexadecyl alcohol 7.0
Glycerol monostearate2.0
Monostearic acid POE (20) sorbitan 1.0
Polyglycerin fatty acid ester (E) 10.0
Titanium dioxide 5.0
Talc 3.0
Bengala 0.5
Yellow iron oxide 1.4
Black iron oxide 0.1
Phenoxyethanol appropriate amount edetate trisodium appropriate amount triethanolamine appropriate amount purified water remaining

ADVANTAGE OF THE INVENTION According to this invention, the gel composition which is excellent in a moisturizing effect and a keratin softening effect, has a favorable skin-fitting feeling, and does not produce a sticky feeling is provided. The gel composition of the present invention is suitably used as a cosmetic, particularly a skin cosmetic.

Claims (5)

(A) A water-soluble thickener obtained by copolymerizing acrylic acid and / or a salt thereof or an acrylic acid derivative, and acrylamide alkyl sulfonic acid and / or a salt thereof, or the obtained copolymer further with an alkali agent A water-soluble thickener obtained by neutralization with
(B) A gel composition comprising one or more polyglycerol fatty acid esters represented by the following general formula (1).

(1)
n ≧ 0, R represents a fatty acid residue or H.
Degree of esterification: number of fatty acid residues / number of R is 0.60 or more.   The gel composition according to claim 1, wherein the acrylic acid derivative is one or more of acrylamide, alkyl acrylate, hydroxyalkyl acrylate, and aminoalkyl acrylate.   The gel composition according to claim 1 or 2, wherein the polyglycerol fatty acid ester is liquid at 37 ° C.   Content of the said water-soluble thickener is 0.01 mass% or more with respect to gel composition whole quantity, The gel composition of any one of Claims 1-3 characterized by the above-mentioned. The gel composition according to any one of claims 1 to 4, wherein the content of the polyglycerin fatty acid ester is 0.01% by mass or more and 30.0% by mass or less based on the total amount of the gel composition. object.