JP2001048755A - Base for hair dressing agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject base having an improved luster and an excellent feeling in setting free from a squeaky feeling without impairing the advantage of a base for a cationic hair grooming agent by making the base include a copolymer prepared by polymerizing specific three kinds of monomers. SOLUTION: This base comprises a copolymer obtained by polymerizing (A) 1-30 wt.% of a monomer of formula I (X is O or NH; R1 is H or methyl; R2 is a 2-3C alkylene) (e.g. N-methacryloyloxyethyl-N,N-dimethylammonium-α-N- methycarboxybetaine) with (B) 1-30 wt.% of a monomer of formula II (e.g. N,N-dimethylaminoethyl methacrylate), (C) 40-90 wt.% of a monomer of formula III (e.g. N-vinylacetamide) and/or N-vinylpyrrolidone and, if required, (D) 0.1-25 wt.% of an ethylene-based unsaturated monomer copolymerizable with the components A to C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a hairdressing base. For more information, hair mousse, hair mist,
The present invention relates to a base for a hairdressing agent which can be suitably used for an aqueous hairdressing agent such as hair blow and hair set lotion.

[0002]

2. Description of the Related Art Conventionally, nonionic bases and cationic bases represented by copolymers containing N-vinylpyrrolidone as a main component have been known as bases for hair styling having high water solubility ( JP-A-59-75911 and JP-B-56-759.
No. 4533), these hair styling bases have been used since ancient times to date, such as hair mousse, hair mist, hair blow,
It is well known that it has been widely used in aqueous formulations such as hair set lotions.

[0003] However, nonionic hairdressing bases represented by homopolymers of N-vinylpyrrolidone lack adhesion to hair and have a hard coating film on the hair, so that they are accompanied by bending of the hair. It has a drawback that a so-called flaking phenomenon is apt to occur, in which dandruff-like white powder from which the film is peeled off is generated. Further, the set holding power under high humidity cannot be satisfied.

[0004] On the other hand, the cationic base is a base for a cationic hairdressing agent represented by a copolymer of N-vinylpyrrolidone and a quaternary amine monomer. It can be said that this is an improvement over the disadvantages of the polymer as a hairdressing base. As a result, since it is cationic, it has a high affinity with the hair, thereby making it possible to relatively suppress the flaking phenomenon. In addition, the set hair is supple and the holding power of the set is also improved, so that the setting property of the hair styling agent is also improved.

However, when the quaternary amine monomer is frequently used as a resin for a high-molecular weight hairdressing base, the set hair has a squeaky feeling, loses luster, and impairs the feeling of the set feeling. Would.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and does not impair the advantages of the base for a cationic hairdressing agent. An object of the present invention is to provide a hairdressing base having an excellent texture.

[0007]

The present invention provides (A) a compound represented by the following general formula (I):

[0008]

Embedded image

(Where X is an oxygen atom or an NH group, R ¹
Represents a hydrogen atom or a methyl group, and R ² represents an alkylene group having 2 to 3 carbon atoms).
% By weight, (B) general formula (II):

[0010]

Embedded image

(Where X is an oxygen atom or an NH group, R ¹
Is a hydrogen atom or a methyl group, and R ² is an alkylene group having 2 to 3 carbon atoms).
% By weight, and (C) a general formula (III):

[0012]

Embedded image

(Wherein R ¹ represents a hydrogen atom or a methyl group) and at least one monomer (C) 40 selected from the group consisting of a monomer (C-1) and N-vinylpyrrolidone (C-2). The present invention relates to a hairdressing base comprising a copolymer obtained by polymerizing a monomer component containing about 90% by weight.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION As described above, the base for hair styling of the present invention comprises (A) a compound of the general formula (I):

[0015]

Embedded image

(Where X is an oxygen atom or an NH group, R ¹
Represents a hydrogen atom or a methyl group, and R ² represents an alkylene group having 2 to 3 carbon atoms).
% By weight, (B) general formula (II):

[0017]

Embedded image

(Where X is an oxygen atom or an NH group, R ¹
Is a hydrogen atom or a methyl group, and R ² is an alkylene group having 2 to 3 carbon atoms).
% By weight, and (C) a general formula (III):

[0019]

Embedded image

Wherein R ¹ represents a hydrogen atom or a methyl group, and at least one monomer (C) 40 selected from the group consisting of a monomer (C-1) and N-vinylpyrrolidone (C-2). It comprises a copolymer obtained by polymerizing a monomer component containing about 90% by weight.

In the present invention, the monomer (A),
Since the monomer (B) and the monomer (C) are used simultaneously and the monomer component contained in a specific ratio is polymerized, the flaking phenomenon, which is an advantage of the above-mentioned base for a cationic hairdressing agent, is suppressed, For hair styling products that can simultaneously satisfy the characteristics of being able to set hair flexibly and excelling in set holding power, without impairing characteristics such as squeaky feeling, excellent gloss, and excellent texture when setting. The base is obtained.

The monomer (A) used in the present invention is an amphoteric monomer having a betaine structure represented by the general formula (I), which imparts water solubility to the resulting hairdressing base,
It is also a component that imparts affinity to hair and improves adhesion.

Representative examples of the monomer (A) include, for example, N- (meth) acryloyloxyethyl-N, N
-Dimethylammonium-α-N-methylcarboxybetaine, N- (meth) acryloylamidopropyl-
N, N-dimethylammonium-α-N-methylcarboxybetaine and the like.
A mixture of more than one species can be used.

The amount of the monomer (A) used is 1% by weight or more, preferably 5% by weight, of the monomer component to be polymerized so that the affinity for hair is reduced and a flaking phenomenon does not occur. The content is more preferably 8% by weight or more, and 30% by weight or less of the monomer component to be subjected to polymerization, preferably, in order to prevent the formed hair styling film from becoming too soft and sticky. It is at most 28% by weight, more preferably at most 25% by weight.

The monomer (B) used in the present invention is an amino group-containing monomer represented by the general formula (II),
It is a component that can change the moisture resistance of the hairdressing base obtained by optionally neutralizing. It is also a component that imparts flexibility.

Representative examples of the monomer (B) include, for example, N, N-dimethylaminoethyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylamide and the like. These can be used in combination.

The amount of the monomer (B) used is at least 1% by weight, preferably at least 3% by weight, more preferably at least 6% by weight of the monomer component to be subjected to polymerization so that the moisture resistance is not significantly reduced. In addition, in order to prevent a squeaky feeling from being generated in the film of the hair styling agent to be formed and the gloss from being impaired, 30% by weight or less, preferably 27% by weight or less of the monomer component subjected to the polymerization, More preferably, it is at most 25% by weight.

The monomer (C) used in the present invention is a vinylamide monomer (C-
1) and / or N-vinylpyrrolidone (C-2), which imparts water solubility to the resulting hairdressing base,
It is a component that forms a good film when applied to hair and gives gloss.

Typical examples of the monomer (C-1) include N-vinylformamide and N-vinylacetamide. These and N-vinylpyrrolidone (C-2) may be used alone or in combination of two or more. They can be used in combination.

The amount of the monomer (C) used is preferably 40% by weight of the monomer component to be subjected to polymerization so that a good film would not be formed when the obtained hairdressing preparation base was applied to hair. % Or more, preferably 45% by weight or more,
More preferably, it is 50% by weight or more, and the film of the hairdressing agent becomes too hard, causing a flaking phenomenon,
In order to prevent the moisture resistance from significantly lowering, it is 90% by weight or less, preferably 85% by weight or less, more preferably 80% by weight or less of the monomer component used for polymerization.

In the present invention, an ethylenically unsaturated monomer (D) copolymerizable with the monomers (A), (B) and (C) can be used as a monomer component.

The monomer (D) is a component suitably used for imparting flexibility, water resistance and appropriate hardness to the obtained film formed from the base for a hairdressing agent, and changing the feel.

Representative examples of the monomer (D) include, for example, (meth) acrylic acid, dimethylaminoethyl (meth)
Acrylate or quaternary dimethylaminopropyl (meth) acrylamide, (meth) acrylamide, t
-Butyl acrylamide, diacetone acrylamide, linear or branched alkyl (meth) acrylate having 1 to 18 carbon atoms, linear or branched hydroxyalkyl (meth) acrylate having 1 to 4 carbon atoms, polyethylene Examples thereof include (meth) acrylates containing a hydroxyl group such as glycol mono (meth) acrylate and polypropylene glycol mono (meth) acrylate, methyl etherified products of the (meth) acrylate containing hydroxyl group, and vinyl acetate. These may be used alone or in combination of two or more. Can be used in combination.

The amount of the monomer (D) used is preferably 0.1% by weight or more, and more preferably 0.1% by weight, of the monomer component to be subjected to polymerization in order to sufficiently exert the effect of imparting a desired texture to the formed film. It is desirable that the amount is 1% by weight or more, more preferably 2% by weight or more. Since there is a possibility that the base may not be obtained, it is desirable that the amount is 25% by weight or less, preferably 20% by weight or less, more preferably 15% by weight or less of the monomer component to be subjected to polymerization.

The base for a hairdressing composition of the present invention is obtained by polymerizing the above-mentioned monomer (A), monomer (B) and monomer (C) and, if necessary, a monomer component in which a desired amount of monomer (D) is adjusted. Obtained by preparing a copolymer.

The polymerization method is not particularly limited. For example, ordinary bulk polymerization, precipitation polymerization,
A suspension polymerization method, an emulsion polymerization method, a solution polymerization method, and the like can be employed.However, when formulating cosmetics, it is necessary to dissolve the obtained hairdressing base in water or a hydrophilic solvent. In consideration of this, it is preferable to employ a solution polymerization method in which polymerization is performed in advance in water or a hydrophilic solvent.

Here, the hydrophilic solvent is an organic solvent having a solubility in water of 10 g / 100 g of water (25 ° C.) or more. Representative examples of such hydrophilic solvents include, for example, aliphatic C1-4 alcohols having 1 to 4 carbon atoms, ethyl cellosolve, butyl cellosolve, dioxane, methyl acetate,
Examples thereof include dimethylformamide, and among them, monohydric alcohols are particularly preferable for handling as cosmetic raw materials.

Specific examples of the above-mentioned monohydric alcohol include, for example, methanol, ethanol, isopropanol and the like. Specific examples of the dihydric alcohol include:
For example, propylene glycol and the like can be mentioned.

In addition, the base for hair styling of the present invention may adhere to the skin of the human body.
Among the hydrophilic solvents, ethanol and isopropanol are particularly preferred.

In the polymerization, a monomer component comprising the monomers (A), (B) and (C) and, if necessary, a monomer (D) is dissolved in water or the above-mentioned hydrophilic solvent, and a polymerization initiator is added. However, for example, it can be performed by stirring while heating under an inert gas stream such as nitrogen gas.

The polymerization initiator is not particularly limited as long as it is generally used in a solution polymerization method. Specific examples thereof include benzoyl peroxide and benzoyl peroxide.
Examples include peroxides such as lauroyl peroxide and azo compounds such as azobisisobutyronitrile. In addition,
In the present invention, when acrylic acid and an acrylate monomer are used as the monomer components to be subjected to polymerization, if peroxide is used as the polymerization initiator, there is a possibility that cross-linking gelation may occur. Preferably, a compound is used.

In the polymerization, the water or the hydrophilic solvent is preferably used by adjusting the concentration of the mixture of the monomer components to about 10 to 60% by weight. In addition,
When the concentration of the mixture of the monomer components exceeds 50% by weight, the polymerization can be carried out by dividing the mixture of the monomer components and gradually adding the mixture to carry out the polymerization, thereby avoiding rapid generation of polymerization reaction heat and safely polymerizing. It is preferable to perform the above.

The polymerization temperature cannot be determined unequivocally because it varies depending on the type of polymerization initiator to be used. However, it is usually preferable to set the polymerization initiator to a 10-hour half-life temperature. It is preferable that the polymerization temperature is close to the reflux temperature because polymerization with higher reproducibility can be carried out.

If the polymerization time is shorter than 8 hours, the polymerization may be incomplete and unreacted monomers may remain. Therefore, the polymerization time should be 8 hours or more, preferably 12 to 36 hours. desirable.

It should be noted that whether or not the residual monomer exists is determined by
It can be performed by confirming whether or not a double bond exists by a general method, for example, the PSDB method.

If necessary, an organic acid such as acetic acid, lactic acid, citric acid and ascorbic acid and an inorganic acid such as hydrochloric acid, phosphoric acid and sulfuric acid can be used as a pH adjuster after the polymerization reaction. In addition, you may use such a pH adjuster before superposition | polymerization.

The pH adjuster acts as a neutralizer for the amino group derived from the monomer (B), and as described above, depends on the degree of neutralization of the amino group, the base for a hairdressing agent. Can be changed. Although it depends on the amount of the monomer (B) used, when about 60 mol% or less of the total amount of amino groups derived from the monomer (B) is neutralized, the moisture resistance is not significantly reduced.

The base for a hairdressing composition of the present invention thus obtained is characterized in that its constituent copolymer is 50,000-1200.
About 000, especially 100,000-1,000,000
It has a degree of viscosity average molecular weight and can be used as it is or without solvent.

When the hairdressing composition of the present invention is used in, for example, a set lotion, the hairdressing composition dissolved in water or a hydrophilic solvent used as the polymerization solvent may be used, for example. What is necessary is just to fill in the use container with an additive, an auxiliary agent, etc., and to enclose. In this case, the mixing ratio of the various components to be filled in the container used,
Normally, it is desirable to appropriately adjust them according to the purpose and application.

[0050]

Next, the base for a hairdressing composition of the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Example 1 N-methacryloyloxyethyl-N, N-dimethylammonium-α was placed in a 500 ml five-necked flask equipped with a reflux condenser, a thermometer, a nitrogen gas inlet tube, a charging tube, and a stirrer. -N-methylcarboxybetaine 2
0 parts by weight, 5 parts by weight of N, N-dimethylaminoethyl methacrylate, 60 parts by weight of N-vinylpyrrolidone, 15 parts by weight of N-vinylacetamide and 400 parts by weight of purified water. 0.3 parts by weight of butyronitrile (hereinafter referred to as AIBN) was added, and the polymerization reaction was carried out at 70 to 75 ° C. for 15 hours under a nitrogen gas stream with stirring, and the reaction was completed to obtain a 20% by weight copolymer solution. Obtained. The viscosity average molecular weight of the copolymer is 9200
00.

Example 2 N-methacryloyloxyethyl-N, N-dimethylammonium-α was placed in a 500 ml five-necked flask equipped with a reflux condenser, a thermometer, a nitrogen gas inlet tube, a charging tube, and a stirrer. -N-methylcarboxybetaine 2
0 parts by weight, 10 parts by weight of N, N-dimethylaminoethyl methacrylate, 70 parts by weight of N-vinylpyrrolidone, and 150 parts by weight of ethanol.
Parts by weight and stirring under nitrogen gas flow.
The polymerization reaction was started at ７５75 ° C. 4 hours after the start, AI
0.1 parts by weight of BN was added, and the mixture was further polymerized for 11 hours to complete the reaction. Thereafter, 25 mol% of the total amino groups of N, N-dimethylaminoethyl methacrylate was neutralized with 1.43 parts by weight of lactic acid (diluted in a 40% by weight lactic acid ethanol solution) to obtain a 40% by weight copolymer solution. . The viscosity average molecular weight of the copolymer was 250,000.

Examples 3 to 8 In Examples 3, 5 and 8 (when the reaction solvent was purified water), copolymers were obtained in the same manner as in Example 1 except that the monomer components were changed as shown in Table 1. Was.

For Examples 4, 6 and 7 (when the reaction solvent was ethanol), copolymers were obtained in the same manner as in Example 2 except that the monomer components were changed as shown in Table 1.

In Examples 3 to 6, the amino group derived from the monomer (B) was neutralized in the same manner as in Example 2 except that the amount of the neutralizing agent (lactic acid) used was changed as shown in Table 1. I did it.

Each abbreviation in Table 1 means the following compounds. Table 1 also shows the viscosity average molecular weight and copolymer content of the obtained copolymer.

DMMABT: N-methacryloyloxyethyl-N, N-dimethylammonium-α-N-methylcarboxybetaine DMAPMABT: N-methacryloylamidopropyl-N, N-dimethylammonium-α-N-methylcarboxybetaine DMAPAABT: N -Acryloylamidopropyl-
N, N-dimethylammonium-α-N-methylcarboxybetaine DMMA: N, N-dimethylaminoethyl methacrylate DMAPMA: N, N-dimethylaminopropyl methacrylamide DMAPAA: N, N-dimethylaminopropylacrylamide NVP: N-vinyl Pyrrolidone NVA: N-vinylacetamide EMA: Ethyl methacrylate TBMA: t-butyl methacrylate LMA: lauryl methacrylate SMA: stearyl methacrylate MAA: methacrylic acid DAAm: diacetone acrylamide TBAAm: t-butyl acrylamide HEMA: hydroxyethyl methacrylate M-90G: methoxy Polyethylene glycol methacrylate (n = 9) DMDS: N, N-dimethylaminoethyl methacrylate Rate of diethyl sulfate quaternary salt

[0058]

[Table 1]

Comparative Examples 1 to 4 The following polymers were prepared, and the polymers of Comparative Examples 1 to 3 were added with ethanol to obtain a base for hair styling which was a polymer ethanol solution having a polymer content of 40% by weight. did.

The product of Comparative Example 4 was prepared as an aqueous polymer solution having a polymer content of 20% by weight.

Comparative Example 1: Polyvinylpyrrolidone (K = 3
0, sold by Kishida Chemical Co., Ltd.) Comparative Example 2: N-vinylpyrrolidone-vinyl acetate copolymer (trade name: PVA-6450, Osaka Organic Chemical Industry Co., Ltd.)
Comparative Example 3: N-vinylpyrrolidone-N, N-dimethylaminoethyl methacrylate diethyl sulfate copolymer (trade name: HC Polymer 3A, Osaka Organic Chemical Industry Co., Ltd.)
Comparative Example 4: N-vinylpyrrolidone-N, N-dimethylaminoethyl methacrylate diethyl sulfate copolymer (trade name: HC Polymer 1S, Osaka Organic Chemical Industry Co., Ltd.) stock)
Manufactured, viscosity average molecular weight: 800,000-1,000,000)

The copolymer solutions (base for hair styling) obtained in Examples 1 to 8 and the polymer solutions (base for styling) of Comparative Examples 1 to 4 both exhibit water solubility. there were.

Formulation Examples 1 to 8 and Comparative Formulation Examples 1 to 4 With respect to the bases for hair styling preparations of Examples 1 to 8 and Comparative Examples 1 to 4, the bases for an ethanol-based styling preparation having a polymer content of 40% by weight include: 80 parts by weight of ethanol and 95 parts by weight of purified water are added to 25 parts by weight of this base, and a base for an aqueous hairdressing agent having a polymer content of 20% by weight is prepared by adding 50 parts by weight of this base to 55 parts by weight of purified water. By adding 5 parts by weight and 95 parts by weight of ethanol, a uniform hair lotion hairdressing composition was obtained which was a polymer solution having a polymer content of 5% by weight (water: ethanol (weight ratio) = 1: 1).

This hair lotion hair styling agent was filled in a bottle type hair lotion container (content: 100 ml) to prepare a hair lotion product.

Next, using the obtained hair lotion product, the set retention power (moisture resistance), suppleness, flexibility and glossiness as properties of the hair lotion hairdressing agent, and the detergency as the physical properties of the formed film. And smoothness was examined according to the following method. Table 2 shows the results.
Shown in

(A) Set holding power (moisture resistance) 2 g of 25 cm long hair and 3 g of hair lotion
Was applied uniformly so as not to spill, the hair was wound around a curler having an outer diameter of 1.2 cm, and dried with warm air at 40 ° C. for 60 minutes. Thereafter, the hair was removed from the curler, and the hair was suspended vertically in an atmosphere at a temperature of 30 ° C. and a relative humidity of 90% (L1).
2) was measured, and the curl retention (%) was calculated from the following equation.

[0067]

(Equation 1)

In Table 2, the curl retention was 65%.
A for the above, B for 60% or more and less than 65%,
Those with less than 60% were designated C.

(B) Suppleness 2 g of hair 25 cm long and 3 g of hair lotion
Was uniformly applied so as not to be spilled, and before drying, the hairs were aligned with a commercially available comb and dried with warm air at 40 ° C. for 60 minutes to evaluate the feel of the hair based on the following evaluation criteria.

(Evaluation Criteria) A: There is no stiffness when touched by hand, and the feel is natural. B: There is a little stiffness when touched by hand. C: Roughness is severe when touched by hand, and there is a hard feel.

(C) Flexibility 2 g of 25 cm long hair and 3 g of hair lotion hair styling agent
Was uniformly applied so as not to be spilled, and dried with warm air at 40 ° C. for 60 minutes. About 1c from the center of this hair
The operation to bend up and down with the finger at the interval of m
The change of the coating film was visually observed repeatedly and evaluated based on the following evaluation criteria.

(Evaluation Criteria) A: No change. B: Peeling of the film is slightly observed. C: The front surface of the bent portion becomes white, and peeling of the film is remarkable.

(D) Gloss 2 g of hair 25 cm long and 3 g of hair lotion
Was uniformly applied so as not to be spilled, dried with warm air of 40 ° C. for 60 minutes, visually observed for glossiness, and evaluated based on the following evaluation criteria.

(Evaluation Criteria) A: Very glossy. B: Slightly glossy. C: No gloss.

(E) Detergency 3 g of a hair lotion hairdressing agent was uniformly applied to a glass plate of 2.5 cm × 7.5 cm using a spoid, and then washed.
After drying at 0 ° C. for 3 hours, a film was formed. The glass plate was immersed in warm water containing 0.2% by weight of shampoo at 40 ° C., and the change over time in the dissolved state of the film was examined. The evaluation was made based on the following evaluation criteria.

(Evaluation Criteria) A: The film is completely dissolved within 30 minutes. B: The film completely dissolves within 40 minutes. C: The film remains even after 40 minutes.

(F) Smoothness 3 g of a hair lotion hair styling agent was uniformly applied to a glass plate of 2.5 cm × 7.5 cm using a spoid.
After drying at 0 ° C. for 3 hours, a film was formed. Next,
The feel of the formed film surface was examined with a finger, and the smoothness was evaluated based on the following evaluation criteria.

(Evaluation Criteria) A: Completely smooth. B: There is some roughness. C: There is considerable roughness.

[0079]

[Table 2]

From the results shown in Table 2, the hair styling preparation bases obtained in Examples 1 to 8 all have the necessary properties as hair styling preparations. 1-4
As is clear from the comparison, not only is the set retention power improved, but also the tactile physical properties such as flexibility and flexibility compared to conventional nonionic and cationic hairdressing bases as an improved set feeling. It turns out that it is also excellent.

[0081]

The base for a hairdressing composition of the present invention can be used not only for a set lotion, but also for a mousse and the like, like the conventional nonionic and cationic hairdressing compositions. In addition, the set hair has a natural texture with excellent touch physical properties such as suppleness and flexibility as compared with the setting feeling obtained using the conventional nonionic and cationic hairdressing base.

Further, the base for a hairdressing composition of the present invention sufficiently has properties required for a hairdressing composition such as gloss.

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 4C083 AC011 AC102 AD071 AD072 CC32 DD23 EE06 EE21 4J100 AJ02S AL08P AL08Q AL08S AL09S AM15S AM19Q AM21P AM21Q AM21S AN06R AQ08R BA03S BA08S BA12S BA31P BA32P CA03P

Claims (2)

[Claims] (A) General formula (I): (Wherein X represents an oxygen atom or an NH group, R ¹ represents a hydrogen atom or a methyl group, and R ² represents an alkylene group having 2 to 3 carbon atoms) 1 to 30% by weight of a monomer (A):
(B) General formula (II): (Wherein X represents an oxygen atom or an NH group, R ¹ represents a hydrogen atom or a methyl group, and R ² represents an alkylene group having 2 to 3 carbon atoms). C) General formula (III): (Wherein R ¹ represents a hydrogen atom or a methyl group) at least one monomer (C) selected from the group consisting of monomer (C-1) and N-vinylpyrrolidone (C-2) in an amount of 40 to 90% by weight. % For a hairdressing agent comprising a copolymer obtained by polymerizing a monomer component containing 0.1% by weight. 2. A monomer component containing 0.1 to 25% by weight of an ethylenically unsaturated monomer (D) copolymerizable with the monomer (A), the monomer (B) and the monomer (C). The base for a hairdressing preparation according to 1.