JPH07285832A - Hair cosmetic composition - Google Patents

Abstract

(57) [Summary] [Structure] (A) Zwitterionic unsaturated monomer, (B) (meth) acrylic acid alkyl ester having an alkyl group having 1 to 4 carbon atoms, (C) 16 to 24 carbon atoms (Meth) acrylic acid alkyl ester having an alkyl group of, and (D)
A hair cosmetic composition comprising a zwitterionic polymer, which is a copolymer with another polymerizable unsaturated monomer, in a cosmetic medium. [Effect] The hair cosmetic composition according to the present invention exhibits excellent setting properties under high temperature and high humidity, and has a good feeling in use.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a hair cosmetic composition, more specifically,
The present invention relates to a hair cosmetic composition containing a specific zwitterionic polymer, exhibiting excellent settability under high temperature and high humidity and having a good feeling in use.

[0002]

2. Description of the Related Art Acrylic acid is used as a hairdressing polymer.
Anionic polymer, which is a copolymer containing a neutralized product of vinylcarboxylic acid such as methacrylic acid, crotonic acid, maleic acid, etc. as a hydrophilic component, nonionic polymer which is a copolymer containing vinylpyrrolidone etc. as a hydrophilic component, and carboxy. Zwitterionic polymers, which are copolymers having a betaine moiety as a hydrophilic group, are known.

Among them, a zwitterionic polymer which is a copolymer of a carboxybetaine-containing monomer and an alkyl ester of acrylic acid and / or methacrylic acid is excellent in terms of performance such as affinity with hair and setting power. Known as a polymer for hair styling (JP-A-51-9732, JP-A-SHO-5)
5-104209, etc.), and further, amphoteric ionic polymers having a high proportion of amphoteric amount which imparts a conditioning effect such as combability and smoothness to these excellent performances and has a good usability are also known. (JP-A-61-2
58804).

However, the above-mentioned conventionally known zwitterionic polymers have insufficient settability in a high temperature and high humidity atmosphere, and further, they have a soft finish,
It was unsatisfactory when it was desired to have a hard feel.

[0005]

DISCLOSURE OF THE INVENTION In order to solve the problems of the hair cosmetics using the above-mentioned conventionally known zwitterionic polymer, the present invention relates to the type of copolymerizable monomer of the zwitterionic polymer. By examining the ratio, the hair styling resistance, that is, the hair that has been stylisted (set) has an excellent property that the hair styling shape is maintained even in a high temperature and high humidity atmosphere, and is not easily affected by humidity. The present invention aims to provide a hair cosmetic composition having excellent combability, smooth feel, and excellent feel in use, which results in a hard feel.

[0006]

That is, the present invention provides (A)
Amphoteric unsaturated monomer; 20 to 60% by weight, (B) alkyl (meth) acrylate having an alkyl group having 1 to 4 carbon atoms; 20 to 50% by weight, (C) 16 carbon atoms
A copolymer of (meth) acrylic acid alkyl ester having an alkyl group of 24 to 24; 10 to 40% by weight, and (D) another polymerizable unsaturated monomer; 0 to 20% by weight, and a weight average molecular weight. A zwitterionic polymer having a content of 10,000 to 500,000 is contained in a cosmetic medium in an amount of 0.1 to 10% by weight, which provides a hair cosmetic composition having excellent resistance to moisture conditioning and excellent feel in use. Is.

The zwitterionic polymer used in the hair cosmetic composition of the present invention contains the above-mentioned monomers (A) to (C) as essential components and, if desired, (D) another polymerizable unsaturated monomer. It can be obtained by copolymerizing the body as an optional component. These polymerizable unsaturated monomers can be used in combination within each group.

(A) Zwitterionic unsaturated monomer As the zwitterionic unsaturated monomer, an unsaturated monomer having a zwitterionic group, for example, (meth) represented by the following general formula (I) is used. A derivative of acrylic acid (here, (meth) acrylic acid is a generic term for acrylic acid and methacrylic acid).

[0009]

[Chemical 1]

(Wherein R ¹ is a hydrogen atom or a methyl group, R ² and R ⁵ are each an alkylene group having 1 to 4 carbon atoms; R ³ and R ⁴ are each 1 to 4 carbon atoms. Alkyl group having; A is -O- or -NH- group; B is -COO group, PHO ₃ group, or -SO ₃ group.)

Specific examples of the zwitterionic unsaturated monomer include N- (meth) acryloyloxyethyl N, N-.
Dimethyl ammonium N-methyl carboxylate,
N- (meth) acryloylaminopropyl N, N-dimethylammonium N-methylcarboxylate, N
-(Meth) acryloyloxyethyl N, N-diethylammonium N-propane sulfonate etc. can be mentioned.

After copolymerizing in the form of an amine derivative or an amide derivative of (meth) acrylic acid represented by the following general formula (II), which is a precursor thereof, in place of the zwitterionic unsaturated monomer, It is also possible to obtain a zwitterionized polymer by using an amphoteric agent.

[0013]

[Chemical 2]

(In the formula, R ^{1 to} R ⁴ and A each have the same meaning as in the general formula (I).) Specific examples of the unsaturated monomer of this precursor include, for example, dimethylaminoethyl (meth). ) Acrylate, dimethylaminopropyl (meth) acrylate, diethylaminoethyl (meth) acrylate, dimethylaminoethyl (meth) acrylamide, diethylaminopropyl (meth)
There is acrylamide.

Examples of the amphoteric agent include sodium monobromide acetate, potassium monochloroacetate, lithium monochloropropionate, or monochloroacetic acid and ammonia, 2-amino-2-methyl-1-propanol, triethanolamine, or the like. Examples thereof include monohalogenated fatty acid salts such as hydrates; lactones such as propiolactone; sultones such as propane sultone; and phosphides such as propiophosphide.

The amount of the zwitterionic unsaturated monomer used is 20 to 60% by weight, preferably 25 to 55% by weight based on the total monomers.
% By weight. If it is less than 20% by weight, the resulting zwitterionic polymer is hardly soluble in a hydrophilic solvent, and it is difficult to remove it by washing upon washing the hair. In addition, the affinity for hair due to the zwitterionic nature of this resin decreases, resulting in problems such as flaking and deterioration of antistatic property. If it exceeds 60% by weight, the resulting amphoteric ionic polymer resin has poor moisture resistance, and the hair setting power under high temperature and high humidity becomes insufficient. There is also a problem that the hardness of the polymer film is lowered.

(B) (Meth) acrylic acid alkyl ester having an alkyl group having 1 to 4 carbon atoms Specific examples of the (meth) acrylic acid ester include methyl (meth) acrylate, isopropyl (meth) acrylate, and butyl ( Examples thereof include (meth) acrylic acid alkyl esters having an alkyl group having 1 to 4 carbon atoms such as (meth) acrylate and tertiary butyl (meth) acrylate.

The amount of the unsaturated monomer as the component (B) used is 20 to 50% by weight, preferably 25 to 4% by weight based on all the monomers.
It is 5% by weight. If it is less than 20% by weight, the resulting zwitterionic resin film has a problem that the hardness is insufficient and the film becomes sticky. If it exceeds 50% by weight, there is a problem that the obtained amphoteric ionic polymer resin film becomes brittle.

(C) (Meth) acrylic acid alkyl ester having an alkyl group having 16 to 24 carbon atoms Specific examples of the (meth) acrylic acid ester include palmityl (meth) acrylate, stearyl (meth) acrylate and behenyl ( Examples thereof include (meth) acrylic acid alkyl esters having an alkyl group having 16 to 24 carbon atoms such as (meth) acrylate and oleyl (meth) acrylate.

The amount of the unsaturated monomer as the component (C) used is 10 to 40% by weight, preferably 15 to 3% by weight based on all the monomers.
It is 5% by weight. If it is less than 10% by weight, the resulting zwitterionic polymer resin film may have a poor feel and become brittle. If the amount exceeds 40% by weight, the resulting amphoteric ionic polymer resin film has a problem that the hardness is insufficient and a sticky feeling is exhibited.

(D) Other unsaturated monomer In addition to the above-mentioned unsaturated monomer, it is not an essential component, but other unsaturated monomer in the range of 25% by weight or less based on the total monomers. The body can be used. By appropriately selecting the unsaturated monomer of the component (D) to be used, it is possible to impart appropriate flexibility and hardness to the finally obtained zwitterionic polymer to control the feel and the like.

Specific examples of the unsaturated monomer as the component (D) include 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, tridecyl (meth) acrylate, cyclohexyl (meth) acrylate and cetyl. (Meth) acrylic alkyl ester derivative such as (meth) acrylate; acrylonitrile, hydroxyethyl (meth) acrylate, butoxyethyl (meth) acrylate, benzyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, tetrahydrofurfuryl (meth) Acrylate, ethylene glycol (meth) acrylate, polyethylene glycol (meth) acrylate, propylene glycol (meth) acrylate, polypropylene glycol (meth)
Acrylate, 1,3-butylene glycol di (meth)
(Meth) acrylic derivatives such as acrylate and diacetone acrylamide; aromatic unsaturated monomers such as styrene, chlorostyrene and vinyltoluene; vinyl unsaturated monomers such as N-vinylpyrrolidone and vinyl acetate .

(Copolymer) The copolymerization of the above-mentioned unsaturated monomer can be carried out by a known radical polymerization method such as a bulk polymerization method, a solution polymerization method, a suspension polymerization method or an emulsion polymerization method. The combined method is a solution polymerization method, and is performed by a method in which a predetermined amount of each polymerizable unsaturated monomer is dissolved in a solvent, a polymerization initiator is added, and the mixture is heated and stirred under a nitrogen stream.

Examples of the polymerization initiator include peroxides such as benzoyl peroxide and lauroyl peroxide, and azo compounds such as azobisisobutyronitrile. As the solvent, water; methanol, ethanol, isopropanol,
Alcohols such as ethylene glycol and butyl cellosolve; ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone; acetic acid esters such as methyl acetate and ethyl acetate are preferable, and these solvents may be used by appropriately mixing two or more kinds. Good. The amount of the solvent used is preferably such that the polymer concentration of the produced copolymer solution is 10 to 65% by weight.

In the polymerization, the monomer and the polymerization initiator are
It is usual that all kinds and all amounts thereof are present from the beginning of the polymerization, but a divided addition method can be used for those kinds and / or amounts. The weight average molecular weight of the obtained copolymer is 10,000 to 500,000.
It must be in the 0 range. To control the molecular weight, the polymerization temperature, the type and amount of the polymerization initiator, the amount of the chain transfer solvent such as ethanol and isopropanol, the use of the chain transfer agent such as butyl mercaptan and lauryl mercaptan, and the polymerization conditions are appropriately selected. It can be done by

As described above, instead of the zwitterionic unsaturated monomer, copolymerization is carried out in the form of the amine derivative or amide derivative of its precursor (meth) acrylic acid, and then the amphoteric agent is added. When using to obtain a zwitterionized polymer,
The amount of the amphoteric agent used is 70 to 130 which is a stoichiometric equimolar amount.
% Is preferred. In this amphoteric reaction, when an amphoteric agent that produces a by-product salt such as sodium monobromide acetate or potassium monochloroacetate is used as the amphoteric agent, the by-product salt may be filtered or centrifuged as necessary. It is also possible to separate and remove it by means of ion exchange treatment, and further to remove dissolved salts by means of ion exchange treatment (JP-A-55-104209, JP-A-61-258).
804).

The zwitterionic polymer thus obtained may be used as it is as a solution of the polymer produced, or may be a solid polymer obtained by evaporative removal of the solvent of the polymer solution thus produced or polymer precipitation by using a poor solvent. May be used. The odor of the zwitterionic polymer obtained, if necessary, can be improved by azeotropic distillation with the solvent of the odor component in a solution state, or by adsorption removal with an adsorbent such as activated carbon, activated clay or zeolite. In the solid state, it can be carried out by heating under reduced pressure and extraction with a solvent such as ethers.

(Hair cosmetic composition) The hair cosmetic composition of the present invention comprises the zwitterionic polymer obtained as described above in an amount of 0.1 to 10% by weight in a cosmetic medium. A hair cosmetic composition that is excellent in resistance to moisture conditioning and feel of use. When the content is less than 0.1% by weight, it is insufficient to exert the effect of the polymer of the present invention when used as a hair cosmetic, and when it exceeds 10% by weight,
The amount of the polymer of the present invention attached to the hair is increased, and the effect of the polymer of the present invention is rather impaired.

The cosmetic medium used in the composition of the present invention means a known solvent that constitutes various forms of hair cosmetics, and a liquefied gas and a gas used as a propellant. Specific examples of the solvent include water, hydrophilic solvents such as ethyl alcohol, isopropyl alcohol, and ethylene glycol such as dihydric alcohols, and hydrophobic solvents such as isoparaffin and cyclic silicone. The liquefied gas includes liquefied petroleum gas, dimethyl ether, halogenated hydrocarbon, and the gas includes carbon dioxide gas, nitrogen gas and the like.

Further, known additives may be added to the hair cosmetic composition of the present invention, for example, anionic activators, cationic activators, nonionic activators, zwitterionic activators and the like. Surfactants, and foaming agents, thickeners, hadrotropes, emulsions, conditioning agents including silicone polymers and their chemical modifications, oils and fats, humectants,
There are coloring agents such as plasticizers, dyes and pigments, bactericides and fragrances. In addition, the hair cosmetic composition of the present invention may be used in combination with conventionally used known cationic, anionic, nonionic, etc. natural polymers, natural modified polymers, and synthetic polymers.

Hair cosmetics used in the composition of the present invention include hair cosmetics for removing hair after use such as shampoo, rinse, treatment, permanent wave liquid, mascara, aerosol hair spray, pump hair spray, Foamed hair styling products, set lotions, hair liquids, hair gels, hair creams, hair oils, etc. mean known hair cosmetics such as hair setting agents that do not remove hair after use, but especially preferred applications include hair styling that does not remove hair after use. I have cosmetics.

[0032]

EXAMPLES The present invention will be described in more detail with reference to experimental examples. The parts and% in the production examples are based on the weight, and the parts and% in the examples are based on the weight of the active ingredient.

<Production Example 1> N-methacryloyloxyethyl was added to a five-necked flask equipped with a reflux condenser, a dropping funnel, a thermometer, a glass tube for nitrogen substitution, and a stirrer.
N, N-dimethylammonium N-methylcarboxylate: 50 parts, methylmethacrylate: 15 parts, butylmethacrylate: 15 parts, stearylmethacrylate: 20 parts, and absolute ethanol: 67 parts were added, and azobisisobutyronitrile (hereinafter (Abbreviated as AIBN): 0.
After adding 2 parts and heating under reflux at 80 ° C. under nitrogen flow, after 2 hours, AIBN: 0.6 part and absolute ethanol: 83 parts were added, and copolymerization was further performed under nitrogen flow for 6 hours.
0 part of polymer solution was obtained.

The polymer solution thus obtained is designated as "P-1". In addition, taking a certain amount of the polymer solution,
The active ingredient concentration was 40% by weight, which was determined by drying under reduced pressure at 80 ° C. for 4 hours and weighing the amount of the residue after removing the solvent. Further, the weight average molecular weight of the polymer was 150,000 when measured by gel permeation chromatography (hereinafter abbreviated as GPC) using polystyrene as a standard substance.

<Manufacturing Example 2> 30 parts of dimethylaminoethyl methacrylate were added to the same five-necked flask as in Manufacturing Example 1.
Methyl methacrylate: 40 parts, stearyl methacrylate: 15 parts, behenyl methacrylate: 15 parts, absolute ethanol: 100 parts are added, AIBN: 0.6 part is added, and the mixture is heated under reflux at 80 ° C. under a nitrogen stream and after 2 hours, AI.
BN: 0.6 part was added, and copolymerization was further performed under a nitrogen stream for 6 hours. Next, a 40% anhydrous ethanol suspension of a neutralized potassium hydroxide solution of monochloroacetic acid in an equimolar amount to dimethylaminoethyl methacrylate was added dropwise to the five-necked flask with a dropping funnel, and heated under reflux at 80 ° C under a nitrogen stream. Then, the amphoteric reaction was carried out for 12 hours.

The resulting viscous suspension was filtered with a filter to obtain a suspension, and the filtrate was regenerated with a cation exchange resin ("Diaion PK-220" was regenerated and the system was replaced with absolute ethanol). Through a column packed with, then regenerated anion exchange resin (“Diaion PA-416” after regeneration,
The system was replaced with absolute ethanol) and the column was passed through.

Next, the solvent was removed under reduced pressure at 70 ° C. to obtain a solid. The solid matter was crushed, washed well with diethyl ether, and well dried under reduced pressure at 70 ° C. to obtain 100 parts of solid matter. The polymer thus obtained is designated as "P-2". The weight average molecular weight of the polymer was 70,000 when measured by GPC as in Production Example 1.

<Manufacturing Example 3> 50 parts of dimethylaminoethyl methacrylate were added to the same five-necked flask as in Manufacturing Example 1.
Methyl methacrylate: 15 parts, isobutyl methacrylate: 15 parts, stearyl methacrylate: 10 parts, stearyl acrylate: 10 parts, and isopropanol: 300 parts are added, AIBN: 1.0 part is added, and the mixture is heated under reflux at 80 ° C. under a nitrogen stream. And after 2 hours AIBN:
1.0 part was added and the copolymerization was further carried out for 6 hours in a nitrogen stream.

Next, a 40% isopropanol solution of propanesartone in an equimolar amount to dimethylaminoethyl methacrylate was added dropwise to the five-necked flask with a dropping funnel, and the mixture was heated under reflux at 80 ° C. under a nitrogen stream for 4 hours for amphoterization. The reaction was carried out to obtain 480 parts of a polymer solution having an active ingredient concentration of 28% by weight. The polymer solution thus obtained was treated with "P-
3 ”. The weight average molecular weight of the polymer was 30,000 as measured by GPC as in Production Example 1.

<Production Example 4> N-acryloylaminopropyl N, N-dimethylammonium N-methylcarboxylate: 3 was placed in the same five-necked flask as in Production Example 1.
Add 0 parts, tertiary butyl acrylate: 40 parts, behenyl methacrylate: 15 parts, tridecyl methacrylate: 15 parts, and absolute ethanol: 67 parts, and add
BN (0.1 part) was added, the mixture was refluxed and heated at 80 ° C. under a nitrogen stream, 2 hours later, AIBN (1.0 part) was added, and copolymerization was further conducted under a nitrogen stream for 6 hours. Thereafter, 33 parts of anhydrous ethanol was added to obtain 195 parts of a polymer solution having an active ingredient concentration of 50% by weight. The polymer solution thus obtained is designated as "P-4". The weight average molecular weight of the polymer was 200, when measured by GPC as in Production Example 1.
It was 000.

<Production Example 5> N-methacryloyloxyethyl N, N- was placed in the same five-necked flask as in Production Example 1.
Dimethyl ammonium N-methyl carboxylate:
10 parts, methyl methacrylate: 50 parts, lauryl methacrylate: 40 parts, and absolute ethanol: 67 parts were added, AIBN: 0.2 part was added, and the mixture was heated under reflux at 80 ° C. under a nitrogen stream and after 2 hours AIBN: 0. 6 parts, and 83 parts of absolute ethanol were added, and copolymerization was further carried out for 6 hours in a nitrogen stream to obtain 240 parts of a polymer solution having an active ingredient concentration of 40% by weight. The polymer solution thus obtained is designated as "P-5". The weight average molecular weight of the polymer is
When measured by GPC in the same manner as in Production Example 1, 150,00
It was 0.

<Production Example 6> In a five-necked flask similar to Production Example 1, dimethylaminoethyl methacrylate: 70
Parts, methyl acrylate: 20 parts, stearyl acrylate: 10 parts, absolute ethanol: 100 parts, AI
BN: 0.6 part was added, reflux heating was carried out at 80 ° C. under a nitrogen stream, 2 hours later, AIBN: 0.6 part was added, and copolymerization was further conducted under a nitrogen stream for 6 hours.

Next, a 40% anhydrous ethanol suspension of a potassium hydroxide neutralized product of monochloroacetic acid in an equimolar amount to dimethylaminoethyl methacrylate was added dropwise, and the amphoteric reaction, filtration and ionization were performed in the same manner as in Production Example 2. Exchange treatment and solvent removal were carried out to obtain 105 parts of a polymer solid. The polymer thus obtained is designated as "P-6". The weight average molecular weight of the polymer was 70,000 when measured by GPC as in Production Example 1.

<Example 1>"P- obtained in Production Example 1"
When 1 "was spray-applied to the hair in the form of an aerosol spray or a pump spray having the following formulation, it exhibited a good setting force and a good feeling in use even under high temperature and high humidity. In addition, when the hardness of the applied hair was measured, it showed a good hard feel and had good washability (Table 1).

Each evaluation method will be described later. (1) Aerosol spray (parts by weight) Polymer (as an active ingredient) 5, 3, or 0.5 Petroleum liquefied gas 20 Ethanol balance (total) 100 (2) Pump spray (parts by weight) Polymer (as an active ingredient) 5, 3 or 0.5 Water 20 Ethanol balance (total) 100

<Examples 2 to 4>"P-2","P-"
3 "and" P-4 "were evaluated in a spray form in the same manner as in Example 1, and similar to" P-1 ", good performance as a hair cosmetic composition was shown (Table 1).

<Comparative Examples 1 to 3>"P-5","P-"
6 ”, and Gantrez, which is a current anionic commercial product
ES-225 (anionic polymer sold by US ISP; neutralized 20% of the theoretical amount with aminomethyl propanol and used as an ethanol solution having an active ingredient concentration of 50% by weight) was sprayed in the same manner as in Example 1. When evaluated,
There was insufficient performance or a problem in any of the evaluation items such as the setting power under high temperature and high humidity, the feeling of use, the hardness of the applied hair, or the washability. (Table 1).

[0048]

[Table 1]

<Evaluation method> 1) Setting force: 23 cm, 2 g of straight hair is spray-applied in a fixed amount in the form of an aerosol spray or a pump spray, and immediately wound on a curler having a diameter of 2 cm to be dried. Next, remove the hair removed from the curler at 30 ° C / 95
The hair is hung in a thermo-hygrostat of% RH, the hair elongation after 3 hours is measured, and the curl retention force (%) is obtained by substituting the curl retention formula.

2) Feeling The curled hair obtained by the same operation as the setting force is applied to 2
It is left under the condition of constant temperature and humidity of 3 ° C./60% RH, and the feel when touched with a finger is evaluated. ○ --- Smooth slipperiness △ --- Slightly catching feeling X ---- Sucking feeling or sticky feeling

3) Hardness a) Curled hair obtained by operating in the same manner as the setting force is left to stand under the conditions of constant temperature and humidity of 23 ° C./60% RH, and the hardness when the curl is crushed with a finger ( Elasticity). ○ --- Good elasticity △ --- Resiliency, slightly lacking × --- No elasticity b) 23 cm, 2 g of straight hair is dipped in 3% by weight of ethanol-diluted solution of active ingredient, and immediately after application Roll in a 5 cm curler to dry. Next, remove the hair removed from the curler at 23 ° C / 60
It is allowed to stand under conditions of constant temperature and humidity of% RH and a rheometer (made by Fudo Kogyo Co., Ltd.) is used to measure the weight (g) required to crush the curled hair.

4) Hair Washability A curled hair obtained by using a pump spray containing 5% by weight of a polymer as an active ingredient was operated in the same manner as the setting force, and the dodecyl alcohol / ethoxylate (3EO) kept at 40 ° C. was kept warm. ) / Sulfate salt 10% by weight in water and rinsed well with warm water at 40 ° C. After air-drying, the polymer remaining on the hair is evaluated visually and visually. ○ --The polymer has been removed .---- Some of the polymer remains .---- The polymer remains.

[0053]

EFFECTS OF THE INVENTION The hair cosmetic composition of the present invention has excellent hair styling resistance, that is, the hair that has been stylisted (set) retains the hair styling shape even in a hot and humid atmosphere and is not easily affected by humidity. In addition to the good combability and smooth feel of the conditioned hair, it has an excellent feeling of use in that it gives a hard feel.

Claims (1)

[Claims] 1. A zwitterionic unsaturated monomer (A); 20 to
60% by weight, (B) alkyl (meth) acrylate having an alkyl group having 1 to 4 carbon atoms; 20 to 50% by weight, (C) alkyl (meth) acrylate having an alkyl group having 16 to 24 carbon atoms Ester; 10-40% by weight,
And (D) another polymerizable unsaturated monomer; a copolymer with 0 to 20% by weight, and a weight average molecular weight of 10,000 to 50
A hair cosmetic composition having an excellent moisture styling resistance and a feeling in use, which comprises 0.1 to 10% by weight of a zwitterionic polymer having a weight ratio of 10,000 in a cosmetic medium.