JP2003081739A - Cosmetic base and cosmetic compounded therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cosmetic base having high compatibility with LPG as well as high moisture resistance and good hair rinsing ability, and to provide a cosmetic compounded with the base. SOLUTION: This cosmetic base comprises a polymer which is obtained by polymerization of a monomer component comprising (A) 25-70 wt.% of a monomer of formula (I) (R<1> is H or CH3 ; R<2> is H, a 1-12C alkyl or C(CH3 )2 CH2 COCH3 ; and R<3> is H or a 1-12C alkyl), (B) 5-60 wt.% of a monomer of formula (II) (R<4> is a 3C or 5C alkylene), (C) 2-20 wt.% of a monomer of formula (III) (R<5> is H or CH3 ; R<6> is H or COOH; and R<7> is H, CH3 or CH2 COOH), (D) 3-40 wt.% of a monomer of formula (IV) (R<8> is H or CH3 , R<9> is a 1-4C alkylene; R<10> and R<11> are each H or a 1-8C alkyl; and A is O or NH) and (E) 2-30 wt.% of a monomer of formula (V) (R<12> and R<15> are each H or CH3 ; R<13> and R<14> are each a 2-4C alkylene; and m and n are each 0-50, except that m and n are both 0). The other objective cosmetic compounded with the above base is provided.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cosmetic base and a cosmetic comprising the same. More specifically, it is suitable for use as a cosmetic base which is excellent not only in moisture resistance and hair washability but also in compatibility with liquefied petroleum gas (hereinafter referred to as LPG), and particularly as an aerosol type cosmetic for hairdressing. Cosmetics that can be done.

[0002]

2. Description of the Related Art Conventionally, N has been applied to cosmetics, especially hair cosmetics.
Substrates containing vinylpyrrolidone are widely used. The advantage of the substrate containing N-vinylpyrrolidone is that it is excellent in water solubility and a glossy film having an appropriate hardness can be obtained. These are physical properties suitable for hair cosmetics.

As such a cosmetic base material containing N-vinylpyrrolidone as a main component, for example, a nonionic cosmetic base material (Japanese Patent Application Laid-Open No. 59-75911) or a cationic cosmetic base material (Japanese Patent Publication No. 56). No. 4533) is known.

Moisture resistance and hair washability are important physical properties required for a hair styling base material among cosmetic base materials. These are generally contradictory physical properties, and it is difficult to achieve compatibility at a high level. The nonionic cosmetic base material and the cationic cosmetic base material have excellent hair washability,
Therefore, the humidity resistance is extremely low. As a result, there is a drawback that the holding power for a long time is small.

As a cosmetic base material having an excellent set holding power, for example, an anionic cosmetic base material represented by an alkanolamine liquid of an acrylic resin is known (Japanese Patent Publication No. 44-31238). Contrary to the above-mentioned nonionic and cationic cosmetic base materials, this anionic cosmetic base material has high moisture resistance and excellent set holding power, but has low water solubility, so that it is easy to wash hair. I don't like it.

An amphoteric cosmetic base material is known as a material for compensating for the drawbacks of the nonionic cosmetic base material, the cationic cosmetic base material and the anionic cosmetic base material (Japanese Patent Laid-Open No. 7-1).
33212). This amphoteric cosmetic base material realizes both moisture resistance and hair washability, which have been difficult to date. Also, since this amphoteric cosmetic base material is amphoteric,
It is a base material that not only has excellent compatibility with other resins but also has many advantages such as less stickiness and a better feeling in use.

However, since the amphoteric cosmetic base material generally tends to have low solubility in LPG, when it is usually formulated into a spray, the solvent content such as ethanol is increased in the composition of the stock solution to increase the content of the base material. There are many restrictions in terms of prescription, such as reducing or using dimethyl ether (hereinafter referred to as DME) as a propellant. Therefore, it is not suitable as a hair styling agent in a spray formulation.

In addition to the above, the carboxyl group-containing ethylenically unsaturated monomer, the alkylene glycol-based unsaturated monomer and the amino group-containing ethylenically unsaturated monomer are used as essential monomer components (meth). ) There is also provided an amphoteric hairdressing resin composition containing an acrylic copolymer and a gel base, which is neutralized with a basic compound (JP-A 2000-
154124).

However, since the (meth) acrylic copolymer contained in the amphoteric hair styling resin composition and the gel base are well compatible with each other, the amphoteric hair styling resin composition is extremely suitable as, for example, a gel hair styling agent. However, like the amphoteric cosmetic base material, it tends to have a low solubility in LPG, and therefore, there are many restrictions on the formulation when it is usually formulated into a spray. Further, such a (meth) acrylic copolymer has low moisture resistance by itself. Therefore, this amphoteric hair styling resin composition is not suitable as a hair styling agent in a spray formulation.

[0010]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and while maintaining the advantages as an amphoteric cosmetic base material such as excellent moisture resistance and hair washability, LPG is also used. It is an object of the present invention to provide a base material for cosmetics, which has excellent compatibility with, and can be suitably used particularly for aerosol type cosmetics, and a cosmetic material containing the base material.

[0011]

The present invention comprises: (A) General formula (I):

[0012]

[Chemical 6]

(Wherein R ¹ is a hydrogen atom or a methyl group,
R ² is a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, or
_{C (CH 3) 2 CH 2} COCH 3, R 3 monomers (A) 25 to 70 wt%, represented by denotes a hydrogen atom or an alkyl group having 1 to 12 carbon atoms), (B) the general formula (II):

[0014]

[Chemical 7]

5 to 60% by weight of the monomer (B) represented by the formula (wherein R ⁴ represents an alkylene group having 3 or 5 carbon atoms), and (C) the general formula (III):

[0016]

[Chemical 8]

(In the formula, R ⁵ is a hydrogen atom or a methyl group,
R ⁶ represents a hydrogen atom or —COOH, R ⁷ represents a hydrogen atom, a methyl group or —CH ₂ COOH) 2 to 20% by weight of a monomer (C), (D) a general formula (IV):

[0018]

[Chemical 9]

(Where R is⁸Is a hydrogen atom or a methyl group,
R⁹Is an alkylene group having 1 to 4 carbon atoms, R ^TenAnd R¹¹Is
Each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
Group, A represents —O— or —NH—)
Monomer (D) 3-40% by weight and (E) general formula
(V):

[0020]

[Chemical 10]

(Wherein R ¹² and R ¹⁵ are each independently a hydrogen atom or a methyl group, R ¹³ and R ¹⁴ are each independently an alkylene group having 2 to 4 carbon atoms, and m and n are each independently A polymer obtained by polymerizing a monomer component containing 2 to 30% by weight of a monomer (E) represented by 0 or an integer of 1 to 50 (m and n are not 0 at the same time). The present invention relates to a base material for cosmetics and a cosmetic material containing the base material for cosmetics.

[0022]

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

[0023]

[Chemical 11]

(In the formula, R ¹ is a hydrogen atom or a methyl group,
R ² is a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, preferably 1 to 8 or —C (CH ₃ ) ₂ CH ₂ COCH ₃ , R ³
Represents a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, preferably 1 to 8 carbon atoms)
70% by weight, (B) general formula (II):

[0025]

[Chemical 12]

5 to 60% by weight of the monomer (B) represented by the formula (wherein R ⁴ represents an alkylene group having 3 or 5 carbon atoms), and (C) the general formula (III):

[0027]

[Chemical 13]

(In the formula, R ⁵ is a hydrogen atom or a methyl group,
R ⁶ represents a hydrogen atom or —COOH, R ⁷ represents a hydrogen atom, a methyl group or —CH ₂ COOH) 2 to 20% by weight of a monomer (C), (D) a general formula (IV):

[0029]

[Chemical 14]

(In the formula, R ⁸ is a hydrogen atom or a methyl group,
R ⁹ is an alkylene group having 1 to 4 carbon atoms, preferably 2 to 3 carbon atoms, R ¹⁰ and R ¹¹ are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, preferably 1 to 4 carbon atoms, and A is-.
3 to 40% by weight of a monomer (D) represented by O- or -NH-) and (E) a general formula (V):

[0031]

[Chemical 15]

(Wherein R ¹² and R ¹⁵ are each independently a hydrogen atom or a methyl group, R ¹³ and R ¹⁴ are each independently an alkylene group having 2 to 4 carbon atoms, and m and n are each independently 0 or 1 to 50, preferably 1 to 20
Is a polymer obtained by polymerizing a monomer component containing 2 to 30% by weight of a monomer (E) represented by the integer (where m and n are not 0 at the same time).

The monomer (A) used in the present invention is an amide-based monomer represented by the general formula (I), which improves the compatibility of the resulting cosmetic base with LPG and has an appropriate hardness for a film. And a hydrophilic component.

Specific examples of the monomer (A) include Nt-butyl (meth) acrylamide, diacetone (meth) acrylamide, (meth) acrylamide,
Examples thereof include N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N-isopropyl (meth) acrylamide, Nt-octyl (meth) acrylamide, etc., which may be used alone or in combination of two or more. Can be used simultaneously.

In the present specification, "... (meth) acry" means "... acry" and "... meth".

When the amount of the monomer (A) used is too small, the aerosol suitability of the resulting cosmetic base,
That is, since the compatibility with LPG becomes low, 25% by weight or more, preferably 28% by weight or more of the total amount of the monomer components,
More preferably, it is 30% by weight or more. Further, when the amount of the monomer (A) used is too large, the hair washability of the obtained cosmetic base is impaired, and therefore 70% by weight or less, preferably 65% by weight or less, and more preferably the total amount of the monomer components is more preferable. It is 60% by weight or less.

The monomer (B) used in the present invention is N-vinylpyrrolidone represented by the general formula (II) and /
Alternatively, it is N-vinylcaprolactam, which is a component which improves the compatibility of the obtained cosmetic base with LPG, and further imparts hair washability and gloss and hardness to the film.

When the amount of the monomer (B) used is too small, the aerosol suitability of the resulting cosmetic base,
That is, the compatibility with LPG is low, and the hair washability and the gloss of the film are insufficient. Therefore, it is 5% by weight or more, preferably 8% by weight or more, and more preferably 10% by weight or more based on the total amount of the monomer components. If the amount of the monomer (B) used is too large, the resulting cosmetic base has low moisture resistance. Therefore, 60% by weight or less, preferably 55% by weight or less of the total amount of the monomer components is more preferable. Fifty
It is less than or equal to weight%.

The monomer (C) used in the present invention is a carboxyl group-containing acidic monomer represented by the general formula (III), and can be obtained by neutralizing the carboxyl group with a basic compound as described later. It is a component that imparts further hair washability to the cosmetic base. In addition, it is a component that improves the moisture resistance of the resulting cosmetic base by ionic cross-linking with the monomer (D) described later and has the effect of reducing stickiness when dried.

Specific examples of the monomer (C) include (meth) acrylic acid, itaconic acid, crotonic acid, maleic acid and the like, and these can be used alone or in combination of two or more.

If the amount of the monomer (C) used is too small, not only the washability of the resulting cosmetic base will deteriorate, but also the effect of ionic crosslinking with the monomer (D) will not be obtained. , 2% by weight of the total amount of monomer components
The amount is preferably 3% by weight or more, more preferably 5% by weight or more. Further, when the amount of the monomer (C) used is too large, the moisture resistance of the obtained cosmetic base is lowered and the compatibility with LPG is deteriorated. Is 18% by weight or less, more preferably 15% by weight or less.

The monomer (D) used in the present invention is an amino group-containing monomer represented by the general formula (IV),
For example, as will be described later, it is a component that imparts a washability to the resulting cosmetic base by neutralizing the amino group with an acidic compound and imparts an affinity to hair. Further, it is a component which improves the moisture resistance of the obtained cosmetic base by ionic cross-linking with the monomer (C) intermolecularly and brings about the effect of reducing stickiness when dried.

Specific examples of the monomer (D) include, for example, N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylamide, N. , N-dimethylaminopropyl (meth) acrylamide and the like, and these may be used alone or in combination of two or more.

When the amount of the monomer (D) used is too small, the resulting cosmetic base has poor hair washability,
Since the affinity for hair becomes low, the film peels off from the surface of the hair, so-called flaking phenomenon increases, and the effect of ionic crosslinking with the monomer (C) becomes poor, so 3% by weight or more of the total amount of monomer components , Preferably 5
It is at least wt%, more preferably at least 8 wt%. If the amount of the monomer (D) used is too large,
Since the moisture resistance of the obtained cosmetic base is lowered and stickiness when dried is increased, 40% by weight or less, preferably 35% by weight or less, and more preferably 30% by weight of the total amount of the monomer components.
It is less than or equal to weight%.

The monomer (E) used in the present invention is a hydroxyalkyl (meth) acrylate or polyoxyalkylene (meth) acrylate represented by the general formula (V), and provides the resulting cosmetic base with flexibility. It is a component to be added.

Specific examples of the monomer (E) include, for example, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate. , Methoxy polypropylene glycol mono (meth) acrylate, butoxy polyethylene glycol mono (meth) acrylate and the like, and these can be used alone or in combination of two or more.

If the amount of the monomer (E) used is too small, the flexibility of the obtained cosmetic base is lowered, so that the amount of the monomer component is 2% by weight or more, preferably 3% by weight.
It is at least wt%, more preferably at least 5 wt%. If the amount of the monomer (E) used is too large,
Since the moisture resistance of the obtained cosmetic base is lowered and the compatibility with LPG is lowered, it is 30% by weight or less, preferably 25% by weight or less, and more preferably 20% by weight of the total amount of the monomer components.
It is less than or equal to weight%.

Furthermore, in the present invention, the polymer is a monomer component (monomer (A) to ((A) to (B)), a monomer (B), a monomer (C), a monomer (D) and a monomer (E), all of which are the above-mentioned monomers. It may be obtained by polymerizing a monomer component) having an amount of E) of 100% by weight. For example, the obtained cosmetic base is water-soluble, oil-soluble, odorous, sticky, and slippery. In consideration of imparting effects such as feeling, dryness, natural feeling, film-forming property, viscosity, transparency, gas permeability, and compatibility with other additives, the monomer (A) to (E) are used together. A polymerizable ethylenically unsaturated monomer (F) (hereinafter referred to as monomer (F)) can be used as a monomer component.

Specific examples of the monomer (F) include, for example, alkali metal salts of (meth) acrylic acid, ammonium salts of (meth) acrylic acid, methyl (meth) acrylate,
Ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, neopentyl (meth) acrylate,
Cyclohexyl (meth) acrylate, benzyl (meth) acrylate, octyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate,
Cetyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, ethyl carbitol (meth) acrylate, methoxyethyl (meth) acrylate, methoxybutyl (meth) acrylate, (meth) acryloylmorpholine, N, N -Dimethylaminoethyl (meth) acrylate tertiary salt and quaternary salt thereof, N, N-dimethylaminopropyl (meth) acrylate tertiary salt and quaternary salt thereof, N, N-diethylaminoethyl (meth) acrylate And a quaternary salt thereof, a tertiary salt of N, N-diethylaminopropyl (meth) acrylate and a quaternary salt thereof, a tertiary salt of Nt-butylaminoethyl (meth) acrylate, Nt- Butylaminopropyl (meth)
Tertiary salt of acrylate, tertiary salt of N, N-dimethylaminoethyl (meth) acrylamide and quaternary salt thereof,
N, N-Dimethylaminopropyl (meth) acrylamide tertiary salt and quaternary salt thereof, N, N-diethylaminoethyl (meth) acrylamide tertiary salt and quaternary salt thereof, N, N-diethylaminopropyl (meth) Acrylamide tertiary salt and quaternary salt thereof, N- (meth) acryloyloxymethyl-N, N-dimethylammonium-
α-N-carboxybetaine, N- (meth) acryloyloxyethyl-N, N-dimethylammonium-α-
N-carboxybetaine, N- (meth) acryloyloxypropyl-N, N-dimethylammonium-α-N
-Carboxybetaine, N- (meth) acryloyloxymethyl-N, N-diethylammonium-α-N-carboxybetaine, N- (meth) acryloyloxyethyl-N, N-diethylammonium-α-N-carboxybetaine, Monofunctional monomers such as N- (meth) acryloyloxypropyl-N, N-diethylammonium-α-N-carboxybetaine, styrene, methyl itaconate, ethyl itaconate, vinyl acetate, vinyl propionate; 1,4-butane Diol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate,
2-n-butyl-2-ethyl-1,3-propanediol di (meth) acrylate, tripropylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, methylenebisacrylamide,
Examples thereof include polyfunctional monomers such as trimethylolpropane tri (meth) acrylate and pentaerythritol tri (meth) acrylate, and these can be used alone or in combination of two or more.

When the amount of the monomer (F) used is too small, the effect of using the monomer (F) is not sufficiently exhibited, so 3% by weight or more, preferably 5% by weight of the total amount of the monomer components is used. % Or more is desirable. When the amount of the monomer (F) used is too large, the amount of the monomers (A) to (E) used is relatively small, and the effects of these monomers (A) to (E) are sufficiently exhibited. Since it is difficult to do so, it is desirable that the amount is 30% by weight or less, preferably 25% by weight or less based on the total amount of the monomer components.

The polymer used in the present invention can be obtained by polymerizing the above-mentioned monomers (A) to (E) and, if necessary, a monomer component in which a desired amount of the monomer (F) is adjusted.

The polymerization of the monomer component can be carried out in an aqueous solution of the monomer component or in an organic solvent. That is, a monomer component having a desired composition is sufficiently dissolved in purified water, ion-exchanged water or an organic solvent, and a polymerization initiator is added while stirring with heating as necessary, and polymerization is performed in an inert gas atmosphere. do it.

The organic solvent is not particularly limited and includes, for example, alcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, ethylene glycol and propylene glycol; ketones such as acetone and methyl ethyl ketone; ethers such as diethyl ether and tetrahydrofuran; Aromatic compounds such as benzene, toluene and xylene; hydrocarbons such as n-hexane and cyclohexane; acetic acid esters such as methyl acetate and ethyl acetate, and other organic solvents that are commonly used in solution polymerization can be used. Among these, alcohols such as ethyl alcohol and isopropyl alcohol are particularly preferable in consideration of blending the obtained cosmetic base with cosmetics.

When the polymerization is carried out in the above aqueous solution or organic solvent, it is preferable to adjust the concentration of the monomer component to about 20 to 60% by weight. If the concentration of all monomer components exceeds 50% by weight, there is a fear that a rapid heat generation will occur during the polymerization reaction. Therefore, all monomer components should be divided and gradually added to carry out the polymerization. Is preferred.

The polymerization initiator is not particularly limited, and examples thereof include azoisobutyronitrile, methyl azoisobutyrate,
Azo-based polymerization initiators such as azobisdimethylvaleronitrile and dimethylazobismethylpropionate; peroxide-based polymerization initiators such as benzoyl peroxide; persulfate-based polymerization initiators such as potassium persulfate and ammonium persulfate Can be used. The amount of the polymerization initiator may be about 0.01 to 5 parts by weight with respect to 100 parts by weight of the total amount of the monomer components.

The polymerization temperature at the time of carrying out the polymerization cannot be unconditionally determined because it depends on the kind of the polymerization initiator to be used, but it is usually preferred to be around 10 hours half-life temperature of the polymerization initiator. In addition, the polymerization time during the polymerization is usually preferably about 5 to 20 hours in order to eliminate the possibility that the unreacted monomer component remains due to the incomplete polymerization.

The presence or absence of unreacted monomer is determined by, for example, P
The presence or absence of the double bond can be measured and confirmed by a general analysis method such as the SDB method (pyridine dibromide sulfate method).

The viscosity average molecular weight of the polymer thus obtained is not particularly limited, but in consideration of the use of the cosmetic base as a cosmetic, it is 1000 or more, preferably 500.
0 or more and 1,000,000 or less, preferably 200
It is preferably 000 or less.

The polymer may be a solution of the organic solvent obtained by the polymerization as it is, may be diluted with water to be a mixed solution of water / organic solvent, or the organic solvent may be removed. It may be replaced with water to form an aqueous solution.

In order to impart further water solubility to the polymer solution, it is preferable that the carboxyl groups and amino groups contained in the polymer are neutralized. That is, in the polymer, the carboxyl group derived from the monomer (C) is preferably neutralized with a basic compound, and the amino group derived from the monomer (D) is preferably neutralized with an acidic compound.

Specific examples of the basic compound include inorganic basic compounds such as sodium hydroxide and potassium hydroxide; monoethanolamine, triethanolamine,
Examples thereof include organic basic compounds such as morpholine, aminomethylpropanol, aminomethylpropanediol, octylamine, tributylamine and aniline, and these can be used alone or in combination of two or more.

Specific examples of the acidic compound include inorganic acidic compounds such as hydrochloric acid, sulfuric acid and phosphoric acid; organic acidic compounds such as lactic acid, citric acid, glycolic acid, isostearic acid and palmitic acid. Alternatively, two or more kinds can be used simultaneously.

The method of neutralizing the carboxyl group or amino group is not particularly limited, and examples thereof include a method of adding a basic compound or an acidic compound to a solution of the polymer prepared by the above-mentioned polymerization method.

The neutralization ratio of the carboxyl groups derived from the monomer (C) in the polymer thus obtained is such that the water-solubility of the obtained cosmetic base is further improved and excellent hair washability is imparted. 10 mol% or more, preferably 30
It is preferably not less than 95% by mol, preferably not more than 90% by mol, in consideration of its use as a cosmetic in the human body, so that an excessive basic compound is not released by over-neutralization. Is desirable.

The monomer (D) in the obtained polymer is also used.
The neutralization rate of the derived amino group is 10 mol% or more, preferably 30 mol% or more so that the water-solubility of the obtained cosmetic base is further improved and excellent hair washability is imparted. In consideration of its use as a cosmetic in the human body, it is preferably 95 mol% or less, preferably 90 mol% or less so that an excessive acidic compound is not liberated by over-neutralization.

The base material for cosmetics of the present invention is excellent not only in moisture resistance and hair washability but also in compatibility with LPG, and therefore, for example, for hair styling such as aerosol type hair styling cosmetics. Can be suitably used for cosmetics.

The cosmetic of the present invention contains the above-mentioned cosmetic base.

The amount of the above-mentioned cosmetic base in the cosmetic of the present invention is not particularly limited, and may vary depending on the formulation as described below, as long as the effect of the cosmetic base is sufficiently exhibited. Although it may be sufficient, it is desirable that the content of the active ingredient in ordinary cosmetics is, for example, about 0.1 to 20% by weight, preferably about 1 to 10% by weight.

Examples of cosmetics using the cosmetic base of the present invention include hair styling aerosol cosmetics such as hair styling sprays and hair styling color sprays, hair styling gels, hair styling mists, hair styling foams, hair stylings. Hair cosmetics such as creams for hair, waxes for hair styling, color foams for hair styling, mascaras, shampoos and conditioners. As applications other than hair cosmetics, for example, they can be used as hand creams, film forming agents for face packs, film forming agents for nail polish, etc. as skin cosmetics.

For example, when an aerosol type cosmetic for hairdressing is formulated using the cosmetic base of the present invention, the resin concentration is 0.5 to 15% by weight, preferably 2 to 10% by weight. In addition, it is preferable that the cosmetic base of the present invention is contained in the stock solution. The solvent used is preferably mainly ethanol, and if necessary, a higher alcohol such as cetanol or decanol, a component that imparts plasticity such as a lanolin derivative, or a gloss or feel such as a silicone derivative is imparted. You may mix | blend the component which does. Further, another film forming resin may be used. As the propellant, for example, LPG, DME or the like can be used alone or simultaneously. The ratio of the stock solution and the propellant (stock solution / propellant (weight ratio)) is preferably 10/90 to 90/10, and more preferably 30/70 to 70/30.

When a hairdressing gel is formulated using the cosmetic base of the present invention, the resin concentration is 0.5-15.
It is desirable that the base material for cosmetics of the present invention is contained in the undiluted solution in an amount of 1% by weight, preferably 1 to 10% by weight.
Examples of the thickener include anionic thickeners such as carboxyl vinyl polymer (cross-linked polyacrylic acid), cationic thickeners such as vinylpyrrolidone / dimethylaminoethyl methacrylate copolymer, hydroxyethyl cellulose and methyl cellulose. A nonionic thickener or the like can be used. The amount of each thickener used is 0.1 to 10% by weight, preferably 0.3 to 5% by weight, based on the total amount of gel.
Is desirable. As the solvent, for example, purified water or ethanol is used, and if necessary, glycerin,
A polyhydric alcohol such as 1,3-butylene glycol, a surfactant, and a chelating agent may be added.

Further, when a hair styling foam is formulated using the cosmetic base of the present invention, the resin concentration is 0.5 to.
15% by weight, preferably 1-10% by weight,
It is desirable that the cosmetic base of the present invention is contained in the stock solution. The solvent used is preferably purified water or ethanol. In addition, if necessary, nonionic surfactants such as polyoxyethylene hydrogenated castor oil,
Higher alcohols such as cetanol, liquid paraffin, and silicon derivatives may be blended.

Since the cosmetic of the present invention thus obtained contains the above-mentioned cosmetic base, it is excellent not only in moisture resistance and hair washability but also in compatibility with LPG. It can be suitably used as an aerosol type cosmetic for hairdressing.

[0074]

EXAMPLES Next, the cosmetic base of the present invention and the cosmetic comprising the same will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

Example 1 A 1 L 5-necked flask equipped with a reflux condenser, a thermometer, a nitrogen gas introduction tube, and a stirrer was placed in an N-t-butyl acrylamide (30 parts by weight) and diacetone acrylamide (1).
5 parts by weight, 30 parts by weight of N-vinyl-2-pyrrolidone, 5 parts by weight of acrylic acid, 10 parts by weight of N, N-dimethylaminopropylacrylamide, 10 parts by weight of 2-hydroxyethyl methacrylate and 150 parts by weight of absolute ethanol were charged, 0.15 parts by weight of α, α′-azobisisobutyronitrile (hereinafter referred to as AIBN) was added, and the mixture was heated and stirred at 70 ° C. under a nitrogen gas atmosphere with stirring. Five hours after the initiation of polymerization, 0.1 part by weight of AIBN was added, and the amount was further 1
Polymerization was completed by polymerizing for 0 hours to obtain a resin composition.

The obtained resin composition was diluted with ethanol to a concentration of 30% by weight, and further 2-amino-2 was added.
-12.3 parts by weight of a 30% solution of methyl propanol in ethanol (neutralizing agent) was added (in Table 2, 2-amino-
An amount of only 2-methylpropanol (3.7 parts by weight is described) and a neutralization ratio of the carboxyl groups in the resin composition were 60 mol% to obtain a base for amphoteric cosmetics.

The viscosity average molecular weight of the obtained cosmetic base was measured and found to be 110000.

Examples 2 to 12 Resin compositions were prepared in the same manner as in Example 1 except that the monomer components and the neutralizing agent were changed as shown in Tables 1 and 2, and a base for amphoteric cosmetics was prepared. Obtained.

Table 2 also shows the neutralized groups in the resin composition, the neutralization ratio thereof, and the viscosity average molecular weight of the cosmetic base.

The abbreviations in Table 1 and Comparative Examples below mean the following. TBAAm: Nt-butyl acrylamide DAAm: diacetone acrylamide OAAm: N-octyl acrylamide DMAA: N, N-dimethyl acrylamide NVP: N-vinyl-2-pyrrolidone NVC: N-vinyl-2-caprolactam AA: MAA acrylate : Methacrylic acid IA: itaconic acid DMMA: N, N-dimethylaminoethyl methacrylate DMAPMA: N, N-dimethylaminoethyl methacrylamide DMAPAA: N, N-dimethylaminopropylacrylamide HEMA: 2-hydroxyethyl methacrylate HPA: 2-hydroxy Propyl acrylate M-90G: Methoxy polyethylene glycol monomethacrylate (n = 9) MDGMA: Methoxydiethylene glycol methacrylate GLM: Gly Cerrol monomethacrylate HEA: 2-hydroxyethyl acrylate NMA: N-methylol acrylamide BMA: n-butyl methacrylate LA: lauryl acrylate EMA: ethyl methacrylate TBA: t-butyl acrylate VA: vinyl acetate MMA: methyl methacrylate AMP: 2-amino- 2-methyl propanol (30%
Ethanol solution) (In Table 2, the amount of AMP alone (parts by weight) is described.) TEA: Triethanolamine (30% ethanol solution) (In Table 2, the amount of TEA alone (parts by weight) is listed).

Comparative Example 1 Polyvinylpyrrolidone (trade name: K = 30, manufactured by Kishida Kagaku Co., Ltd.) was dissolved in ethanol to adjust the polymer content to 30% by weight.

Comparative Example 2 Vinylpyrrolidone / vinyl acetate copolymer (trade name: PV
A-6450, manufactured by Osaka Organic Chemical Industry Co., Ltd., ethanol solution having a polymer content of 50% by weight) was diluted with ethanol to adjust the polymer content to 30% by weight.

Comparative Example 3 Vinylpyrrolidone / N, N-dimethylaminoethyl diethylsulfate sulfate solution (trade name: HC Polymer 3A, manufactured by Osaka Organic Chemical Industry Co., Ltd., polymer content: 50)
(Wt% ethanol solution) was diluted with ethanol to adjust the polymer content to 30 wt%.

Comparative Example 4 An acrylic resin alkanolamine resin solution (trade name: Anisette NF-1000, manufactured by Osaka Organic Chemical Industry Co., Ltd., ethanol solution having a polymer content of 40% by weight) was diluted with ethanol to give a polymer content of 30. It was adjusted so as to be wt%.

Comparative Example 5 The same operation as in Example 1 described in JP-A-7-133212 was performed.

That is, 500 equipped with a reflux condenser, a thermometer, a nitrogen gas introducing pipe, a charging pipe and a stirring device.
In a mL volume 5-neck flask, MAA 10 parts by weight, AA 8 parts by weight, HEMA 10 parts by weight, DMMA 18 parts by weight, EM
28 parts by weight of A, 26 parts by weight of DAAm and 150 parts by weight of absolute ethanol were added, 0.2 parts by weight of AIBN was added, and the mixture was heated and refluxed at 80 ° C. under a nitrogen gas stream with stirring. Six hours after the initiation of polymerization, 0.2 part by weight of AIBN was added, and the polymerization was further continued for 12 hours to complete the reaction to obtain a resin composition.

The obtained resin composition was diluted with ethanol to a concentration of 30% by weight, and further diluted with 30% of AMP.
50.7 parts by weight of an ethanol solution (neutralizing agent) was added (in Table 2, the amount of AMP alone (15.2 parts by weight) is shown), and the neutralization ratio of the carboxyl groups in the resin composition is 75. A hair dressing base (30% polymer ethanol solution) was obtained in mol%.

The viscosity average molecular weight of the obtained hair styling base was 113,000.

Comparative Example 6 The same operation as in Example 5 described in JP-A-7-133212 was performed.

That is, a resin composition was prepared in the same manner as in Comparative Example 5 except that the monomer component and the neutralizing agent were changed as shown in Tables 1 and 2 to obtain a base for hair styling agent.

Table 2 also shows the neutralized groups in the resin composition and the neutralization ratio thereof, and the viscosity average molecular weight of the hair styling base.

Comparative Example 7 The same operation as in Example 12 described in JP-A-7-133212 was carried out.

That is, a resin composition was prepared in the same manner as in Comparative Example 5 except that the monomer components and the neutralizing agent were changed as shown in Tables 1 and 2 to obtain a hair styling base.

Table 2 also shows the neutralized groups in the resin composition and the neutralization ratio thereof, and the viscosity average molecular weight of the hair styling agent base.

Comparative Example 8 The same operation as in Example 1 described in JP 2000-154124 A was performed.

That is, a 4-mL flask with a capacity of 500 mL equipped with a reflux condenser, a thermometer, a dropping funnel, a glass tube for nitrogen gas replacement and a stirrer was used.
Part by weight, MAA 5 parts by weight, MD in the dropping funnel
A monomer mixture of 19 parts by weight of GMA, 20 parts by weight of GLM, 8 parts by weight of DMMA, 10 parts by weight of MMA and 38 parts by weight of NMA was charged. While stirring with a stirrer, nitrogen gas was passed through the polymerization system for 30 minutes to replace the air and raise the temperature. After the internal temperature reached 70 ° C., 0.6 g of AIBN was added, and the monomer mixture was added dropwise into the flask over 2 hours while stirring under a nitrogen gas stream and under reflux. After completion of the dropping, the reaction was completed by polymerizing under reflux for 3 hours to obtain a resin composition.

The resulting resin composition was diluted with ethanol to a concentration of 30% by weight, and further diluted with 30% of AMP.
6.67 g of an ethanol solution (neutralizing agent) was added (in Table 2, the amount of AMP only (2 parts by weight) is described), and the neutralization rate of the carboxyl groups in the resin composition is 38.6 mol%. To obtain a base for hair styling agent (30% polymer ethanol solution).

The viscosity average molecular weight of the obtained hair styling base was 45,000.

Comparative Example 9 The same operation as in Example 4 described in JP-A 2000-154124 was performed.

That is, a resin composition was prepared in the same manner as in Comparative Example 8 except that the monomer components and the neutralizing agent were changed as shown in Tables 1 and 2 to obtain a hair styling base.

Table 2 also shows the neutralized groups in the resin composition and the neutralization ratio thereof, and the viscosity average molecular weight of the hair styling base.

[0102]

[Table 1]

[0103]

[Table 2]

Formulation Examples 1-12 and Comparative Formulation Examples 1-9
(Aerosol-type cosmetic for hairdressing) Each cosmetic base obtained in Examples 1 to 12 and Comparative Examples 1 to 9 (ethanol solution having a polymer content of 30% by weight)
(In Formulation Examples 1 to 12 and Comparative Formulation Examples 1 to 9, the cosmetic bases of Examples 1 to 12 and Comparative Examples 1 to 9 are used, respectively) 20 parts by weight and 80 parts by weight of absolute ethanol are mixed. Then, a stock solution was prepared. After filling 50 parts by weight of this stock solution into a glass pressure bottle for spraying (content volume: 100 mL), a valve was installed to fill 50 parts by weight of 4.0 kg / cm ² of LPG, and an aerosol type cosmetic for hairdressing was prepared. Obtained.

Formulation Example 13 (Hairdressing gel) Using the cosmetic base (ethanol solution having a polymer content of 30% by weight) obtained in Example 1, a hairdressing gel was prepared according to the following formulation.

[0106]         Composition (% by weight) Carboxy vinyl polymer 0.50 Triethanolamine 0.62 Ethanol 20.00 Base for cosmetics obtained in Example 1 10.00 Purified water 68.88 (Total) (100.00)

Formulation Example 14 (Hairdressing foam) Using the cosmetic base (ethanol solution having a polymer content of 30% by weight) obtained in Example 1, a hairdressing foam was prepared according to the following formulation.

[0108]         Composition (% by weight) Cosmetic base material obtained in Example 1 16.7 Polyoxyethylene hydrogenated castor oil 1.0 Cetanol 0.2 Liquid paraffin 0.5 Ethanol 20.0 Purified water 61.6 (Total) (100.0)

Test Example 1 (Compatibility with LPG) The cosmetic bases obtained in Examples 1 to 12 and Comparative Examples 1 to 9 were diluted with ethanol so that the polymer content was 10% by weight, 2.0 g of the obtained solution was charged into a glass pressure resistant bottle (full volume: 100 mL). A valve was attached to the glass pressure resistant bottle, and 4 kg / cm ² of LPG was added until the solution became cloudy. The LPG compatibility was calculated from the following formula using the amount of LPG added at this time, and the compatibility with LPG was evaluated based on the following evaluation criteria. The results are shown in Table 3.

[0110]

[Equation 1]

(Evaluation criteria) ◯: LPG compatibility is 50% or more. Δ: LPG compatibility is 30% or more and less than 50%. X: LPG compatibility is less than 30%.

Test Example 2 (Stability of Aerosol) The aerosol type hair styling cosmetics obtained in Formulation Examples 1 to 12 and Comparative Formulation Examples 1 to 9 were left in a refrigerator at -10 ° C for 24 hours, and then the solution The state was visually observed, and the stability of the aerosol was evaluated based on the following evaluation criteria. The results are shown in Table 4. (Evaluation Criteria) O: The solution is transparent. Δ: The solution becomes slightly cloudy. X: The solution separates into two layers or precipitates.

Test Example 3 (Moisture resistance) To 2 g of hair (human hair) having a length of 25 cm, the aerosol type cosmetics for hairdressing obtained in Formulation Examples 1 to 12 and Comparative Formulation Examples 1 to 9 were uniformly applied from a distance of 20 cm. Or prescription example 1
After uniformly applying the hair styling gel obtained in 3 or the hair styling foam obtained in Formulation Example 14, the hair is wound on a curler having an outer diameter of 1.2 cm and dried with warm air at 40 ° C. for 60 minutes. did. After that, the hair was removed from the curler, and the length immediately after being hung vertically in an atmosphere of a temperature of 30 ° C. and a relative humidity of 90% (L ₀ ) and the length after standing for 3 hours (L ₁ )
Was measured, and the curl retention (%) was calculated from the following equation. From the obtained curl retention, the moisture resistance (set holding power) was evaluated based on the following evaluation criteria. The results are shown in Table 4. Curl retention (%) = {(25-L ₁ ) / (25
−L ₀ )} × 100 (Evaluation Criteria) ◯: Curl retention is 75% or more. Δ: The curl retention is 60% or more and less than 75%. X: The curl retention is less than 60%.

Test Example 4 (Flexibility) 2 g of hair (human hair) having a length of 25 cm was uniformly coated with the aerosol type cosmetic composition for hairdressing obtained in Formulation Examples 1 to 12 and Comparative Formulation Examples 1 to 9 from a distance of 20 cm. Or prescription example 1
After the hair styling gel obtained in 3 or the hair styling foam obtained in Formulation Example 14 was uniformly applied, the hair was wound on a curler having an outer diameter of 1.2 cm and dried with warm air at 40 ° C. for 60 minutes. . The dried hair was touched with fingers and the suppleness was evaluated based on the following evaluation criteria. The results are shown in Table 4. (Evaluation Criteria) ○: There is no stiffness at all, and it feels natural. Δ: Somewhat rough, but not unnatural feeling. X: Rigid and unnatural feeling.

Test Example 5 (Hair Washability) Whether or not the aerosol type hair styling cosmetics obtained in Formulation Examples 1 to 12 and Comparative Formulation Examples 1 to 9 are uniformly sprayed onto a 10 cm × 10 cm glass plate from a distance of 20 cm. Prescription example 13
The hair styling gel obtained in step 1 or the hair styling foam obtained in Formulation Example 14 was uniformly applied, and further homogenized by a bar coater, followed by drying with warm air at 40 ° C. for 60 minutes. One drop of water was dropped on the dried film, the time required for the film to be completely dissolved was measured, and the hair washability was evaluated based on the following evaluation criteria. The results are shown in Table 4. (Evaluation Criteria) A: The film dissolved in less than 1 minute. Δ: The film dissolved in 1 minute or more and less than 5 minutes. X: The film does not dissolve even after 5 minutes or more.

Test Example 6 (Flexibility) 2 g of hair (human hair) having a length of 25 cm was uniformly coated with the aerosol type cosmetic composition for hairdressing obtained in Formulation Examples 1 to 12 and Comparative Formulation Examples 1 to 9 from a distance of 20 cm. Or prescription example 1
After the hair styling gel obtained in 3 or the hair styling foam obtained in Formulation Example 14 was uniformly applied, the hair was wound on a curler having an outer diameter of 1.2 cm and dried with warm air at 40 ° C. for 60 minutes. . This hair is pinched at a distance of about 1 cm from the center of the hair, and the operation of bending it up and down is repeated 10 times to visually observe the change in the film, and the flexibility (flaking) is evaluated based on the following evaluation criteria. did. The results are shown in Table 4. (Evaluation Criteria) A: There is no change in the film. Δ: Some peeling of the film is recognized. X: The entire bent portion is white, and peeling is remarkable.

Test Example 7 (Smoothness) Whether the hair-styling aerosol type cosmetics obtained in Formulation Examples 1 to 12 and Comparative Formulation Examples 1 to 9 are uniformly sprayed from a distance of 20 cm onto a 10 cm × 10 cm glass plate. Prescription example 13
The hair styling gel obtained in step 1 or the hair styling foam obtained in Formulation Example 14 was uniformly applied, and further homogenized by a bar coater, followed by drying with warm air at 40 ° C. for 60 minutes. The feel of the dried film was examined with fingers and smoothness was evaluated based on the following evaluation criteria. The results are shown in Table 4. (Evaluation Criteria) A: Completely smooth. Δ: Somewhat rough. X: Very rough.

[0118]

[Table 3]

[0119]

[Table 4]

From the results shown in Tables 3 and 4, the hair styling aerosol type cosmetics, hair styling gels and hair styling foams obtained in Formulation Examples 1 to 14 all have high curl retention and excellent moisture resistance. It is also found that the obtained film is supple and has excellent flexibility and smoothness as well as excellent hair washability. Further Example 1
The cosmetic bases obtained in Examples 1 to 12 have excellent compatibility with LPG, and the hair styling aerosol-type cosmetics of Formulation Examples 1 to 12 in which the cosmetic base is blended have excellent aerosol stability. You can see that As described above, the cosmetic containing the cosmetic base of the present invention has the above-mentioned various properties.

On the other hand, the cosmetics obtained in Comparative Formulation Examples 1 to 9 are inferior to any of the characteristics, and the cosmetics of Comparative Formulation Examples 1 to 3 and 5 to 9 which are particularly excellent in hair washability. The composition is inferior in moisture resistance (Comparative Formulation Examples 1 to 3 and 8 to 9), inferior in aerosol stability (compatibility with LPG) (Comparative Formulation Example 5 to 9), and vice versa. It can be seen that the cosmetic of Comparative Formulation Example 4, which has excellent stability and moisture resistance, is inferior in hair washability. As described above, when the cosmetic base of the present invention is not blended, the above various properties cannot be provided.

[0122]

The base material for cosmetics of the present invention is excellent not only in moisture resistance and hair washability, but also in compatibility with LPG.

Therefore, the cosmetic of the present invention containing such a cosmetic base can be suitably used as an aerosol type cosmetic for hairdressing.

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Claims (6)

[Claims] 1. (A) General formula (I): [Chemical 1] (In the formula, R¹Is a hydrogen atom or a methyl group, R²Is hydrogen
Child, an alkyl group having 1 to 12 carbon atoms or -C (CH₃)₂
CH₂COCH₃, R³Is a hydrogen atom or 1 to 12 carbon atoms
(Representing an alkyl group of), a monomer (A) 25
˜70 wt%, (B) general formula (II): [Chemical 2] (In the formula, R^FourRepresents an alkylene group having 3 or 5 carbon atoms
5 to 60% by weight of the monomer (B) represented by
(C) General formula (III): [Chemical 3] (In the formula, R^FiveIs a hydrogen atom or a methyl group, R⁶Is a hydrogen atom
Or -COOH, R⁷Is a hydrogen atom, a methyl group or-
CH₂Monomer (C) 2 represented by COOH)
˜20 wt%, (D) general formula (IV): [Chemical 4] (In the formula, R⁸Is a hydrogen atom or a methyl group, R⁹Has 1 carbon
~ 4 alkylene groups, R ^TenAnd R¹¹Are each independent
And a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, A is -O
--Or --NH--) represented by (D)
3-40% by weight and (E) general formula (V): [Chemical 5] (In the formula, R¹²And R¹⁵Are each independently a hydrogen atom.
Or methyl group, R¹³And R¹⁴Are each independently carbon
The alkylene groups of the numbers 2 to 4, m and n are each independently
0 or an integer of 1 to 50 (where m and n are the same
(E is not 0))
Obtained by polymerizing a monomer component containing 30% by weight
Base for cosmetics consisting of the polymer. 2. The base material for cosmetics according to claim 1, wherein the polymer has 10 to 95 mol% of the carboxyl groups derived from the monomer (C) neutralized with a basic compound. 3. The base material for cosmetics according to claim 1, wherein the polymer is obtained by neutralizing 10 to 95 mol% of amino groups derived from the monomer (D) with an acidic compound. 4. The monomer component is an ethylenically unsaturated monomer (F), which is copolymerizable with the monomer (A), the monomer (B), the monomer (C), the monomer (D) and the monomer (E), in an amount of 0 to 30 parts by weight. % Is contained,
The base material for cosmetics according to 2 or 3. 5. A cosmetic comprising the base material for cosmetics according to claim 1, 2, 3 or 4. 6. The cosmetic according to claim 5, which is an aerosol type cosmetic for hair styling.