JP5416994B2 - Cosmetics - Google Patents

Description

  The present invention relates to a cosmetic comprising a carboxyl group-containing polymer and a cationic polymer that can be suitably used as a thickener for viscous liquids such as hair care and gel cosmetics, for example.

  As a thickener for cosmetics, for example, natural products such as xanthan gum, semi-synthetic materials such as hydroxyethyl cellulose, and synthetic materials such as carboxyvinyl polymers and alkyl-modified carboxyvinyl polymers are widely used. In particular, carboxyl group-containing water-soluble polymers such as carboxyvinyl polymer and alkyl-modified carboxyvinyl polymer exhibit excellent thickening with a small amount of use and can control the feeling of use of cosmetics, and are therefore used in various cosmetics. Yes.

  Examples of the carboxyl group-containing water-soluble polymer include a carboxyvinyl polymer obtained by reacting acrylic acid and pentaerythritol allyl ether as a crosslinking agent in a specific mixed solvent (see Patent Document 1), and a specific amount of olefinic unsaturation. A copolymer obtained by reacting a carboxylic acid monomer with a specific amount of (meth) acrylic acid alkyl ester (alkyl group having 10 to 30 carbon atoms) (see Patent Document 2), a specific amount of olefinic unsaturated carboxylic acid A copolymer obtained by reacting an acid monomer with a specific amount of (meth) acrylic acid alkyl ester (alkyl group having 10 to 30 carbon atoms) and a crosslinking agent (see Patent Document 3), an olefinically unsaturated carboxylic acid Alkyl modification of a copolymer (see Patent Document 4) obtained by reacting a monomer with an alkyl ester of (meth) acrylic acid (alkyl group having 8 to 30 carbon atoms) Carboxyvinyl polymers are known. These carboxyl group-containing water-soluble polymers are usually used in cosmetics by dissolving in water or the like and then neutralizing with an alkali to give a neutralized viscous liquid of about 0.1 to 1% by weight.

  When these neutralized viscous liquids coexist with electrolytes used as various raw materials and additives constituting cosmetics, even if they are at a relatively low concentration, the viscosity and transmittance may decrease, There was a problem that a part of it was deposited. In recent years, in particular, in the field of cosmetics, in addition to various characteristics such as a good appearance such as transparency and a non-sticky feeling, cosmetics formulated with mineral components have been attracting attention. There is a demand for a thickener capable of obtaining a neutralized viscous liquid having high viscosity and high transmittance even in the presence of an electrolyte.

  Among them, in cosmetics such as hair care, cationic polymers are used for the purpose of expressing various functions by being adsorbed on the hair, but conventional carboxyl group-containing water-soluble polymers are cationic polymers. Coexistence with the liquid causes white turbidity and lowers the transparency or lowers the viscosity, and improvement has been desired.

US Pat. No. 5,342,911 Japanese Patent Laid-Open No. 51-6190 JP 59-232107 A US Pat. No. 5,0045,988

  The present invention is a cosmetic comprising a carboxyl group-containing water-soluble polymer and a cationic polymer that can be suitably used as a thickener for viscous liquids such as hair care and gel cosmetics, and has a high viscosity. An object of the present invention is to provide a cosmetic from which a neutralized viscous liquid having excellent transparency can be obtained.

  The present invention relates to a cosmetic comprising a carboxyl group-containing water-soluble polymer and a cationic polymer as described below.

Item 1. 100 parts by weight of (meth) acrylic acid, 0.5 to 5 parts by weight of (meth) acrylic acid alkyl ester having an alkyl group having 18 to 24 carbon atoms, and 0 to 0.1 parts by weight of ethylenically unsaturated group A cosmetic comprising a carboxyl group-containing water-soluble polymer obtained by polymerizing a compound having two or more and a cationic polymer, wherein the cationic polymer is vinylpyrrolidone-N, N dimethylaminoethyl methacrylate copolymer. The neutralized viscosity when 0.5 part by weight of the cationic polymer is added to 100 parts by weight of the 0.5% by weight neutralized viscous liquid of the carboxyl group-containing water-soluble polymer. Cosmetics having a liquid viscosity of 500 mPa · s or more and a transparency of 90% or more.

  Item 2. In the carboxyl group-containing water-soluble polymer, the viscosity of the 1% by weight neutralized viscous liquid of the carboxyl group-containing water-soluble polymer is 1500 mPa · s or less, the transmittance is 90% or more, and the neutralized viscous liquid. The cosmetic according to Item 1, wherein the maximum viscosity when adding 0.25 to 5 parts by weight of sodium chloride to 100 parts by weight is 15000 to 40000 mPa · s, and the transmittance at that time is 90% or more. Fee.

Item 3. Compounds having two or more ethylenically unsaturated groups, pentaerythritol allyl ether, diethylene glycol diallyl ether, is at least one selected from the group consisting of polyethylene glycol diallyl ether and polyallyl saccharose, according to claim 1 or 2 Cosmetics.

  Hereinafter, the present invention will be described in detail.

  In the present invention, acrylic acid and methacrylic acid are collectively referred to as (meth) acrylic acid.

  In the present invention, the neutralized viscous liquid means that the pH of the liquid is 6.5 to 7.5. As a method for preparing a neutralized viscous liquid, for example, after dissolving a carboxy group-containing water-soluble polymer in water, an alkali metal hydroxide such as sodium hydroxide, an amine such as triethanolamine, diisopropanolamine, etc. What is necessary is just to neutralize with alkalis.

  The carboxyl group-containing water-soluble polymer of the present invention comprises (meth) acrylic acid and an alkyl group (meth) acrylic acid alkyl ester having 18 to 24 carbon atoms, and two or more ethylenically unsaturated groups as necessary. It is obtained by polymerizing a compound having the same.

  The (meth) acrylic acid alkyl ester having 18 to 24 carbon atoms in the alkyl group used in the present invention is an ester of (meth) acrylic acid and a higher alcohol having 18 to 24 carbon atoms in the alkyl group. For example, (meth) acrylic acid and stearyl alcohol ester, (meth) acrylic acid and eicosanol ester, (meth) acrylic acid and behenyl alcohol ester and (meth) acrylic acid and tetracosanol Examples include esters. Among these, the neutralized viscous liquid of the obtained carboxyl group-containing water-soluble polymer and the viscosity and transparency of the liquid in the coexistence of the cationic polymer are excellent, so that stearyl methacrylate, eicosanyl methacrylate, Behenyl methacrylate and tetracosanyl methacrylate are preferably used. In addition, as a (meth) acrylic-acid alkylester whose carbon number of an alkyl group is 18-24, you may use commercial items, such as brand name Blemmer VMA70 by Nippon Oil & Fats Co., Ltd., for example.

  The combination of (meth) acrylic acid used in the present invention and the (meth) acrylic acid alkyl ester having an alkyl group having 18 to 24 carbon atoms may be used alone or in combination. Or you may combine and use 2 or more types together about both.

  In the present invention, the alkyl group (meth) acrylic acid alkyl ester having an alkyl group having 18 to 24 carbon atoms is used in an amount of 0.5 to 5 parts by weight, more preferably 100 parts by weight of (meth) acrylic acid. 1 to 3 parts by weight. When the amount of the alkyl (meth) acrylic acid alkyl ester having 18 to 24 carbon atoms in the alkyl group is less than 0.5 parts by weight, the cosmetic product using the resulting carboxyl group-containing water-soluble polymer is increased. On the other hand, if it exceeds 5 parts by weight, the cosmetics using the resulting carboxyl group-containing water-soluble polymer may have a sticky feeling, impair the feeling of use, and the cationic polymer. In the presence of coexistence, the transparency may be lowered.

  The compound having two or more ethylenically unsaturated groups used as necessary in the present invention is not particularly limited, and examples thereof include pentaerythritol diallyl ether, pentaerythritol triallyl ether, and pentaerythritol tetraallyl ether. Pentaerythritol allyl ether such as diethylene glycol diallyl ether, polyethylene glycol diallyl ether and polyallyl saccharose are preferred. These compounds having two or more ethylenically unsaturated groups may be used alone or in combination of two or more.

  In this invention, the usage-amount in the case of using the compound which has 2 or more of ethylenically unsaturated groups is 0.1 weight part or less with respect to 100 weight part of (meth) acrylic acid, Preferably it is 0.0001- 0.05 part by weight, more preferably 0.001 to 0.044 part by weight. When the amount of the compound having two or more ethylenically unsaturated groups exceeds 0.1 parts by weight, the transparency of the neutralized viscous liquid in the cosmetic containing the resulting carboxyl group-containing water-soluble polymer and cationic polymer May be damaged, and the appearance of cosmetics using the cosmetic may be inferior.

  In the present invention, (meth) acrylic acid, and (meth) acrylic acid alkyl ester having an alkyl group of 18 to 24 carbon atoms of 0.5 to 5 parts by weight with respect to 100 parts by weight of (meth) acrylic acid; The method for obtaining a carboxyl group-containing water-soluble polymer by polymerizing 0 to 0.1 parts by weight of a compound having two or more ethylenically unsaturated groups with respect to 100 parts by weight of (meth) acrylic acid, Without being limited, ordinary methods such as a method of stirring these raw materials in a solvent under an inert gas atmosphere and polymerizing using a polymerization initiator can be used.

  Examples of the inert gas for obtaining the inert gas atmosphere include nitrogen gas and argon gas.

The solvent dissolves (meth) acrylic acid, (meth) acrylic acid alkyl ester whose alkyl group has 18 to 24 carbon atoms and a compound having two or more ethylenically unsaturated groups. There is no particular limitation as long as it does not dissolve the water-soluble polymer and does not inhibit the reaction. Specific examples of the solvent include hydrocarbon solvents such as normal pentane, normal hexane, normal heptane, cyclopentane and cyclohexane, and ester solvents such as methyl acetate, ethyl acetate, propyl acetate and butyl acetate. Hexane, normal heptane and ethyl acetate alone or a mixed solvent of two or more are preferably used.

  It is preferable that the usage-amount of a solvent is 300-5000 weight part with respect to 100 weight part of (meth) acrylic acid from a viewpoint of improving stirring operativity and economical efficiency.

  The polymerization initiator is preferably, for example, a radical polymerization initiator. Specific examples include α, α′-azoisobutyronitrile, 2,2′-azobis-2,4-dimethylvaleronitrile, and 2,2 ′. -Azobismethyl isobutyrate etc. can be mentioned. Among these, 2,2'-azobismethylisobutyrate is preferably used from the viewpoint of easily obtaining a high molecular weight carboxyl group-containing water-soluble polymer.

  It is preferable that the usage-amount of a polymerization initiator is 0.00003-0.002 mol with respect to 1 mol of (meth) acrylic acid. When the amount of the polymerization initiator used is less than 0.00003 mol, the reaction rate becomes slow, which may not be economical. Moreover, when the usage-amount of a polymerization initiator exceeds 0.002 mol, superposition | polymerization advances rapidly and there exists a possibility that control of reaction may become difficult.

  The reaction temperature is preferably 50 to 90 ° C, more preferably 55 ° C to 75 ° C. When the reaction temperature is less than 50 ° C., the viscosity of the reaction solution increases and it may be difficult to stir uniformly. Moreover, when reaction temperature exceeds 90 degreeC, reaction may advance rapidly and there exists a possibility that control of reaction may become difficult. Since the reaction time varies depending on the reaction temperature, it cannot be generally specified, but is usually 0.5 to 5 hours.

  After completion of the reaction, the carboxyl group-containing water-soluble polymer can be obtained by heating the reaction solution to, for example, 80 to 130 ° C. to volatilize and remove the solvent. If the heating temperature is less than 80 ° C., drying may take a long time, and if it exceeds 130 ° C., the solubility of the resulting carboxyl group-containing water-soluble polymer in water may be impaired.

  The carboxyl group-containing water-soluble polymer thus obtained is obtained when 0.5 part by weight of a cationic polymer is added to 100 parts by weight of a 0.5% by weight neutralized viscous liquid of the carboxyl group-containing water-soluble polymer. The neutralized viscous liquid has a viscosity of 500 mPa · s or more, preferably 1000 mPa · s or more, and more preferably 3000 mPa · s or more. The upper limit of the viscosity of the neutralizing solution is not particularly limited because it varies depending on the use and purpose, but from a practical viewpoint as a cosmetic, for example, 200000 mPa · s or less, preferably 100000 mPa · s or less, more preferably 50000 mPa · s or less. The neutralized viscous liquid containing the carboxyl group-containing water-soluble polymer and the cationic polymer has a transparency of 90% or more.

  In addition, the carboxyl group-containing water-soluble polymer used in the present invention has a 1% by weight neutralized viscous liquid having a viscosity of 1500 mPa · s or less, a transmittance of 90% or more, and the neutralized viscous liquid of 100% by weight. It is preferable that the maximum viscosity when adding 0.25 to 5 parts by weight of sodium chloride to 1 part is 15000 to 40000 mPa · s, and the transmittance at that time is 90% or more.

  Examples of the cationic polymer used in the present invention include polyquaternium-10 (cationized cellulose), polyquaternium-11 (vinylpyrrolidone-N, N dimethylaminoethyl methacrylic acid copolymer), and polyquaternium-7 (diallyldimethylammonium chloride). -Acrylamide copolymer), polyquaternium-22 (acrylic acid-diallyldimethylammonium chloride copolymer), polyquaternium-39 (acrylic acid-diallyldimethylammonium chloride-acrylamide copolymer), polyquaternium-47, polyquaternium-51, polyquaternium -53, polyquaternium-61, polyquaternium-64, and polyquaternium-65, etc. Cationic polysaccharides typified by thionation guar gum. Among them, polyquaternium-10 (cationized cellulose), polyquaternium-11 (vinyl pyrrolidone-N, N dimethylaminoethyl methacrylate copolymer) from the viewpoint of easily obtaining a gel having high transparency and obtaining an excellent effect as a cosmetic. ) Is preferably used. These cationic polymers may be used individually by 1 type, respectively, and may be used in combination of 2 or more type.

  In the cosmetic according to the present invention, the content of the carboxyl group-containing water-soluble polymer is not particularly limited because it varies depending on the application, purpose, etc., for example, preferably 0.01 to 5.0% by weight, More preferably, it is 0.1 to 2.0 weight%. Further, the content of the cationic polymer is not particularly limited because it varies depending on the use or purpose, but is preferably 0.01 to 10.0% by weight, for example, 0.1 to 2.0% by weight. It is more preferable that

The reason why the neutralized viscous liquid containing a carboxyl group-containing water-soluble polymer and a cationic polymer has high transparency is not clear, but is an alkyl copolymerized with (meth) acrylic acid at a specific ratio. The alkyl group having 18 to 24 carbon atoms introduced into the carboxyl group-containing water-soluble polymer by the (meth) acrylic acid alkyl ester having 18 to 24 carbon atoms is associated with each other by hydrophobic interaction in an aqueous solution. In addition to increasing the viscosity by forming a water-soluble polymer, it suppresses excessive aggregation related to the interaction between the carboxyl group of the carboxyl group-containing water-soluble polymer and the cationic polymer, so that a highly transparent neutralized viscous liquid is obtained. Inferred. Therefore, the cosmetics according to the present invention can be suitably used for viscous liquid or gel cosmetics such as hair care and skin care.

  Examples of such hair care cosmetics include hair gels and shampoos.

  Cosmetics according to the present invention are within the range that does not impair the purpose, other thickeners, alcohols, pH adjusters, humectants, oils, salts, anionic surfactants, nonionic surfactants, A cationic surfactant, a chelating agent, an antiseptic, an antioxidant, an ultraviolet absorber, a dye and a fragrance can be blended to make a cosmetic.

  Since the cosmetic containing the carboxyl group-containing water-soluble polymer according to the present invention and the cationic polymer has a high viscosity and a neutralized viscous liquid excellent in transparency can be obtained, for example, a viscous liquid such as hair care Or gel-like cosmetics.

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples. Of the following examples, Examples 7 to 12 are reference examples.

[Synthesis of water-soluble polymer containing carboxyl group]
Production Example 1
In a 500 mL four-necked flask equipped with a stirrer, a thermometer, a nitrogen blowing tube and a cooling tube, 45 g (0.625 mol) of acrylic acid and an alkyl (meth) acrylate having 18 to 24 carbon atoms in the alkyl group BLEMMER VMA70 as an ester (manufactured by NOF Corporation:
10-5 parts by weight of stearyl methacrylate, 10-20 parts by weight of eicosanyl methacrylate, 59-80 parts by weight of behenyl methacrylate and tetracosanyl methacrylate content of 1 part by weight or less) 0.45 g, normal hexane 150 g and 0.081 g (0.00035 mol) of 2,2′-azobismethylisobutyrate were charged. Subsequently, after stirring and mixing uniformly, nitrogen gas was blown into the solution in order to remove oxygen present in the upper space of the reaction vessel, the raw material and the solvent. Subsequently, it was made to react for 4 hours, hold | maintaining at 60-65 degreeC under nitrogen atmosphere. After completion of the reaction, the produced slurry is heated to 90 ° C. to distill off normal hexane, and further dried under reduced pressure at 110 ° C. and 10 mmHg for 8 hours to obtain a white fine powdery carboxyl group-containing water-soluble polymer. 43 g of (Polymer 1) was obtained.

Production Example 2
In Production Example 1, a white fine powdery (carboxyl group-containing water-soluble polymer (heavy polymer) (heavy polymer) was obtained in the same manner as in Production Example 1 except that the amount of use of Blemmer VMA70 (manufactured by NOF Corporation) was changed to 1.35 g. Combined 2) 44 g was obtained.

Production Example 3
In Production Example 1, a white fine powdery carboxyl group-containing water-soluble polymer (polymer) was prepared in the same manner as in Production Example 1 except that the amount of Blemmer VMA70 (manufactured by NOF Corporation) was changed to 2.25 g. 3) 45 g was obtained.

Production Example 4
In Production Example 1, acrylic acid 45 g (0.625 mol), Blemmer VMA70 (Nippon Yushi Co., Ltd.) 0.45 g, normal hexane 150 g, 2,2′-azobismethylisobutyrate 0.081 g (0.00035) In addition to (mol), 43 g of a white fine powdery carboxyl group-containing water-soluble polymer (polymer 4) was obtained in the same manner as in Production Example 1 except that 0.02 g of pentaerythritol allyl ether was used.

Production Example 5
In Production Example 4, a white fine powdery carboxyl group-containing water-soluble polymer (polymer) was prepared in the same manner as in Production Example 4 except that the amount of Blemmer VMA70 (manufactured by NOF Corporation) was changed to 1.35 g. 5) 44 g was obtained.

Production Example 6
In Production Example 4, a white fine powdery carboxyl group-containing water-soluble polymer (polymer) was prepared in the same manner as in Production Example 4 except that the amount of Blemmer VMA70 (manufactured by NOF Corporation) was changed to 2.25 g. 6) 45 g was obtained.

Production Example 7
In a 500 mL four-necked flask equipped with a stirrer, thermometer, nitrogen blowing tube and cooling tube, acrylic acid 45 g (0.625 mol), pentaerythritol allyl ether 0.02 g, normal hexane 150 g and 2,2′- 0.081 g (0.00035 mol) of azobismethylisobutyrate was charged. Subsequently, after stirring and mixing uniformly, nitrogen gas was blown into the solution in order to remove oxygen present in the upper space of the reaction vessel, the raw material and the solvent. Subsequently, it was made to react for 4 hours, hold | maintaining at 60-65 degreeC under nitrogen atmosphere. After completion of the reaction, the produced slurry is heated to 90 ° C. to distill off normal hexane, and further dried under reduced pressure at 110 ° C. and 10 mmHg for 8 hours to obtain a white fine powdery carboxyl group-containing water-soluble polymer. 42 g of (Polymer 7) was obtained.

Production Example 8
42 g of a white fine powdery carboxyl group-containing water-soluble polymer (polymer 8) was obtained in the same manner as in Production Example 7 except that the amount of pentaerythritol allyl ether used in Production Example 7 was changed to 0.135 g. .

Production Example 9
42 g of a white fine powdery carboxyl group-containing water-soluble polymer (polymer 9) was obtained in the same manner as in Production Example 7 except that the amount of pentaerythritol allyl ether used in Production Example 7 was changed to 0.27 g. .

Production Example 10
In Production Example 1, the amount of Blemmer VMA70 (Nippon Yushi Co., Ltd.) was changed to 1.125 g, and 0.135 g of pentaerythritol allyl ether was added. 44 g of a carboxyl group-containing water-soluble polymer (polymer 10) was obtained.

Production Example 11
In Production Example 7, 0.02 g of pentaerythritol allyl ether was changed to 0.09 g, and 45 g (0.625 mol) of acrylic acid, 150 g of normal hexane, 0.081 g of 2,2′-azobismethylisobutyrate (0 .00035 mol), 43 g of a white fine powdery carboxyl group-containing water-soluble polymer (polymer 11) was obtained in the same manner as in Production Example 7, except that 0.9 g of stearyl methacrylate was used.

Production Example 12
In Production Example 1, the same as Production Example 1 except that 0.42 g of stearyl methacrylate, 0.42 g of eicosanyl methacrylate and 1.86 g of behenyl methacrylate were used instead of 0.45 g of Bremer VMA 70 (manufactured by NOF Corporation). As a result, 46 g of a white fine powdery carboxyl group-containing water-soluble polymer (polymer 12) was obtained.

[Evaluation of water-soluble polymer containing carboxyl group]
In order to evaluate the properties of the polymers 1 to 12 obtained in Production Examples 1 to 12 as thickeners, they were prepared by adding 1% by weight of each neutralized viscous liquid and sodium chloride thereto and stirring them. Viscosity and transmittance were measured for the electrolyte added solution.

(1) Preparation of Evaluation Sample A predetermined number of every 3 g of the polymer as an evaluation sample was weighed and dissolved in 280 g of deionized water while gradually stirring and dissolved. 17 g of sodium oxide was added to obtain a 1% by weight neutralized viscous liquid of the polymer as a uniform solution. These neutralized viscous liquids were pH 6.5-7.5. Moreover, 0.75-15g of sodium chloride is added to each 300g of the said neutralization viscous liquid, and it stirs and melt | dissolves and it is 0.25, 0.5, 0.75, 1, 2, 3, 4 and 5 wt% electrolyte addition solutions were prepared. In addition, in the following evaluation, what left the said 1weight% neutralization viscous liquid and the electrolyte addition solution of each sodium chloride concentration for 1 hour was used as an evaluation sample.

(2) Viscosity measurement For each evaluation sample, the spindle rotor No. was measured at 25 ° C. using a BH type rotational viscometer. The viscosity after 1 minute was measured at a rotational speed of 6 at 20 revolutions per minute. The measurement results are shown in Tables 1-6.

(3) Transmittance measurement About each evaluation sample, after defoaming by operation for 5 minutes at 2000 rpm with a centrifuge, the transmittance was measured at a measurement wavelength of 425 nm using a cell having an optical path length of 1 cm. . Usually, if the transmittance is 90% or more, it can be said to be transparent visually. The measurement results are shown in Tables 1-6.

Examples 1-6
As a carboxyl group-containing water-soluble polymer, 1 g of each of the polymers 1 to 6 obtained in Production Examples 1 to 6 was gradually added to 99 g of pure water (deionized water) with stirring and dispersed uniformly. After adding 94 g of pure water to each 100 g of these aqueous solutions and homogenizing them, 6 g of a 6 wt% aqueous sodium hydroxide solution was added to each of these aqueous solutions to add 0.5 wt% of the carboxyl group-containing water-soluble polymer. A Japanese viscous liquid was prepared.

  In each of these neutralized viscous liquids, 5 g of polyquaternium-11 (vinylpyrrolidone-N, N dimethylaminoethyl methacrylic acid copolymer liquid: pure 20% by weight) as a cationic polymer (0 of the carboxyl group-containing water-soluble polymer). The gel-like neutralized viscous solution containing the cosmetic composition of the present invention is mixed with stirring with 100 parts by weight of the 5% by weight neutralized viscous solution (corresponding to 0.5 parts by weight of the cationic polymer). A liquid was obtained.

  The viscosity and transparency of the obtained neutralized viscous liquid were measured by the same methods as the viscosity measurement and transmittance measurement in the evaluation of the carboxyl group-containing water-soluble polymer, respectively. Table 7 shows the evaluation results.

Examples 7-12
In Examples 1 to 6, a gel-like neutralized viscosity containing the cosmetic of the present invention was obtained in the same manner as in Examples 1 to 6, except that the cationic polymer was changed to 1 g of polyquaternium-10 (cationized cellulose). A viscous liquid was obtained.

  The viscosity and transparency of the obtained neutralized viscous liquid were measured by the same methods as the viscosity measurement and transmittance measurement in the evaluation of the carboxyl group-containing water-soluble polymer, respectively. Table 7 shows the evaluation results.

Comparative Examples 1-6
In Examples 1 to 6, instead of the polymers 1 to 6 obtained in Production Examples 1 to 6 as the carboxyl group-containing water-soluble polymer, the polymers 7 to 12 obtained in Production Examples 7 to 12 were used. Except having used, it carried out similarly to Examples 1-6, and obtained the gel-like neutralization viscous liquid.

  The viscosity and transparency of the obtained neutralized viscous liquid were measured by the same methods as the viscosity measurement and transmittance measurement in the evaluation of the carboxyl group-containing water-soluble polymer, respectively. Each evaluation result is shown in Table 8.

Comparative Examples 7-12
In Examples 7 to 12, instead of the polymers 1 to 6 obtained in Production Examples 1 to 6 as the carboxyl group-containing water-soluble polymers, the polymers 7 to 12 obtained in Production Examples 7 to 12 were used. Except having used, it carried out similarly to Examples 7-12, and obtained the gel-like neutralization viscous liquid.

  The viscosity and transparency of the obtained neutralized viscous liquid were measured by the same methods as the viscosity measurement and transmittance measurement in the evaluation of the carboxyl group-containing water-soluble polymer, respectively. Each evaluation result is shown in Table 8.

Claims (3)

100 parts by weight of (meth) acrylic acid, 0.5 to 5 parts by weight of (meth) acrylic acid alkyl ester having an alkyl group having 18 to 24 carbon atoms, and 0 to 0.1 parts by weight of ethylenically unsaturated group A cosmetic comprising a carboxyl group-containing water-soluble polymer obtained by polymerizing a compound having two or more of the above and a cationic polymer,
The cationic polymer is vinylpyrrolidone-N, N dimethylaminoethyl methacrylic acid copolymer;
The viscosity of the neutralized viscous liquid when 0.5 parts by weight of the cationic polymer is added to 100 parts by weight of the 0.5% by weight neutralized viscous liquid of the carboxyl group-containing water-soluble polymer is 500 mPa · Cosmetics with a transparency of 90% or more.   In the carboxyl group-containing water-soluble polymer, the viscosity of the 1% by weight neutralized viscous liquid of the carboxyl group-containing water-soluble polymer is 1500 mPa · s or less, the transmittance is 90% or more, and the neutralized viscous liquid. The maximum viscosity when adding 0.25 to 5 parts by weight of sodium chloride to 100 parts by weight is 15,000 to 40,000 mPa · s, and the transmittance at that time is 90% or more. Cosmetics.   The compound having two or more ethylenically unsaturated groups used in the carboxyl group-containing water-soluble polymer is at least one selected from the group consisting of pentaerythritol allyl ether, diethylene glycol diallyl ether, polyethylene glycol diallyl ether, and polyallyl saccharose. The cosmetic according to claim 1 or 2, wherein