阅读说明：本技术 化妆料 (Cosmetic material ) 是由 神崎康枝 菊永小百合 潘山成 宮野淳 堀诚司 于 2019-07-31 设计创作，主要内容包括：本发明提供一种能将由疏水性微粒氧化锌所代表的疏水性微粒金属氧化物构成的无机防紫外线剂均匀地在水相中稳定地分散,且即使在具有水相中分散有疏水性微粒金属氧化物的结构的情况下,也会抑制制剂的粘度减少,保存稳定性、使用感以及防紫外线效果优异的化妆料。本发明为包含(A)具有特定的结构的羧酸改性硅酮、(B)水溶性增粘剂、(C)碱性化合物以及(D)由疏水性微粒金属氧化物构成的无机防紫外线剂的化妆料。特别是用作防晒化妆料。(The invention provides a cosmetic which can uniformly and stably disperse an inorganic ultraviolet screening agent composed of hydrophobic particulate metal oxide represented by hydrophobic particulate zinc oxide in an aqueous phase, and can inhibit viscosity reduction of a preparation even if the cosmetic has a structure in which the hydrophobic particulate metal oxide is dispersed in the aqueous phase, and has excellent storage stability, use feeling and ultraviolet screening effect. The present invention is a cosmetic composition comprising (A) a carboxylic acid-modified silicone having a specific structure, (B) a water-soluble thickener, (C) a basic compound, and (D) an inorganic ultraviolet screening agent comprising a hydrophobic fine-particle metal oxide. In particular as sunscreen cosmetic.)

1. A cosmetic material, comprising:

(A) a carboxylic acid-modified silicone which is liquid at room temperature of 25 ℃ and represented by the following structural formula (1),

[ chemical formula 1]

In the formula (I), the compound is shown in the specification,

rc represents the formula-R¹-(OR²)p-(O)w-R³A carboxyl group-containing organic group represented by-COOH wherein R¹Represents a linear or branched alkylene group having 2 to 22 carbon atoms, R²Represents a linear or branched alkylene group having 2 to 4 carbon atoms, R³Represents a bond (-), or a linear or branched alkylene group having 1 to 22 carbon atoms, p represents a number of 0 to 200, w represents a number of 0 or 1,

r are the same or different and each represents an alkyl group or an alkoxy group having 1 to 22 carbon atoms or a phenyl group,

r' is Rc or R,

a. b is positive, a + b is a number in the range of 2 to 20, and a/b is in the range of 0.3 to 3.0;

(B) a water-soluble tackifier;

(C) a basic compound; and

(D) an inorganic ultraviolet screening agent comprising a hydrophobic fine-particle metal oxide,

the cosmetic has a structure in which the component (D) is dispersed in an aqueous phase.

2. The cosmetic according to claim 1,

the water-soluble thickener as the component (B) contains one or more selected from the following substances:

(b1) a carboxyvinyl polymer,

(b2) Acrylic copolymer polymer or salt thereof,

(b3) Alkyl polyoxyethylene acrylic acid/methacrylate copolymer polymer,

(b4) Polyacrylamide and

(b5) water-soluble natural polysaccharide polymers.

3. The cosmetic according to claim 1 or 2, wherein,

the inorganic ultraviolet screening agent as the component (D) contains (D1) hydrophobized fine particle titanium oxide or hydrophobized fine particle zinc oxide having an average particle diameter in the range of 1 to 200 nm.

4. The cosmetic according to any one of claims 1 to 3, wherein,

the inorganic ultraviolet screening agent as the component (D) contains at least (D1-1) hydrophobized fine particle zinc oxide having an average particle diameter in the range of 1 to 200 nm.

5. The cosmetic preparation according to any one of claims 1 to 4,

the inorganic ultraviolet screening agent as the component (D) is blended in the cosmetic in the form of a powder dispersion obtained by mixing all or a part of the component (a) in advance.

6. The cosmetic according to any one of claims 1 to 5, wherein,

the cosmetic further comprises (E) an oil agent.

7. The cosmetic according to claim 6,

the (E) oil agent contains at least one ultraviolet absorbent.

8. The cosmetic according to any one of claims 1 to 7, wherein,

the cosmetic is an oil-in-water type emulsified cosmetic.

9. The cosmetic according to any one of claims 1 to 8, wherein,

the cosmetic further contains at least one selected from (F) oil-soluble film-forming agents, (G) alcohols, (H) water-soluble ultraviolet absorbers, and (I) vinyl polymer emulsions.

10. The cosmetic according to any one of claims 1 to 9, wherein,

the cosmetic is a sunscreen cosmetic.

Technical Field

The present invention relates to a cosmetic which can stably disperse an inorganic ultraviolet screening agent composed of a hydrophobic particulate metal oxide represented by a hydrophobic particulate zinc oxide uniformly in an aqueous phase, and which can suppress a decrease in viscosity of a preparation even when having a structure in which the hydrophobic particulate metal oxide is dispersed in the aqueous phase, and which is excellent in storage stability, feeling in use, and ultraviolet screening effect.

Background

Cosmetics containing an aqueous phase as a continuous phase impart a moist and refreshing feeling in use, and are therefore widely used, for example, as base cosmetics such as lotions, makeup-base cosmetics, sunscreen creams, foundations, and make-up (make-up) cosmetics such as eye shadows. In particular, oil-in-water emulsion cosmetics containing inorganic ultraviolet screening agents represented by hydrophobized particulate titanium oxide and hydrophobized particulate zinc oxide can be designed to have a high SPF (Sun Protection Factor) value as an index indicating the degree of effect of screening UV-B waves (wavelength of 280 to 315nm) in ultraviolet rays, and are widely used in sunscreen cosmetics such as sunscreen cream.

Further, since an oil-in-water type emulsion cosmetic generally has a problem that a cosmetic film obtained by applying the cosmetic has poor water resistance, patent document 1 proposes blending hydrophobic powders such as hydrophobized fine particles of titanium oxide and hydrophobized fine particles of zinc oxide for the purpose of imparting water resistance to a cosmetic film. Further, patent document 2 proposes using a carboxylic acid-modified silicone under an alkaline condition in order to disperse a hydrophobic powder in an aqueous phase well and stabilize a cosmetic.

On the other hand, in recent years, sunscreen cosmetics having high ultraviolet protection performance are particularly required, and the SPF value as an index thereof depends on the amount of an inorganic ultraviolet shielding agent such as hydrophobized fine particles titanium oxide and hydrophobized fine particles zinc oxide, and therefore it is necessary to blend a large amount of these inorganic powders into cosmetics to realize a high SPF value. However, when a large amount of these inorganic ultraviolet screening agents is blended into an oil-in-water type emulsion cosmetic, the feeling of use specific to the oil-in-water type emulsion cosmetic may be impaired, and the feeling may become powdery or coarse. Therefore, the present applicant has proposed an oil-in-water type emulsion cosmetic which combines a vinyl polymer emulsion and a carboxylic acid-modified silicone, as disclosed in patent document 3, for the purpose of achieving both of a water-moist and refreshing feeling in use and a high SPF value which are peculiar to the oil-in-water type emulsion cosmetic, and of providing a film property having high water resistance, particularly, an improvement in ultraviolet light resistance (particularly, SPF value). The present invention is based on the premise that the amount of the inorganic ultraviolet screening agent to be added is suppressed, and the improvement of the ultraviolet screening property (particularly SPF value) is a technical problem, and is not mainly intended to provide a technical solution for increasing the amount of the inorganic ultraviolet screening agent to be added to a preparation.

However, in these documents 1 to 3, there are disclosed water-soluble components (for example, metal cation (M) derived from hydrophobized fine particle titanium oxide, hydrophobized fine particle zinc oxide, etc. and present in an aqueous phase²⁺) Etc.) and the effects thereof on the formulation thereof, without any mention or suggestion.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2004-91423

Patent document 2: japanese laid-open patent publication No. 2015-203026

Patent document 3: japanese patent application 2018-152804 (unpublished at the time of application)

Disclosure of Invention

Technical problem to be solved by the invention

On the other hand, the present applicant has found a new technical problem with respect to a cosmetic composition containing an inorganic ultraviolet screening component such as hydrophobized fine particle titanium oxide or hydrophobized fine particle zinc oxide and having a structure in which the inorganic ultraviolet screening component is dispersed in an aqueous phase.

In general, in order to achieve sufficient spreading and feeling in use when a cosmetic containing an aqueous phase as a continuous phase is applied to the skin, to suppress separation of components as a preparation, to maintain uniform appearance, and to improve storage stability, it is necessary to adjust the overall viscosity of the cosmetic using a water-soluble thickener such as a carboxyvinyl polymer (known by the trade name of carbomer).

Here, as described above, there is a tendency that a cosmetic having high ultraviolet protection performance is required, and the SPF value as an index thereof depends on the blending amount of an inorganic ultraviolet protection agent such as hydrophobized fine particle titanium oxide or hydrophobized fine particle zinc oxide, but the present applicant found that when the dispersion amount of these hydrophobized fine particle metal oxides in an aqueous phase is increased, the overall viscosity of the preparation is lowered even if a water-soluble thickener is used, and these inorganic ultraviolet protection agents cannot be uniformly dispersed, and desired storage stability, water resistance, ultraviolet protection performance and the like cannot be achieved. This phenomenon is considered to be influenced by the hydrophobic fine-particle metal oxide in the aqueous phase or the water-soluble component derived therefrom, but in general, even when a water-soluble thickener such as a carboxyvinyl polymer is used in combination, it is difficult to stably continue dispersing a large amount of these inorganic ultraviolet screening agents in the aqueous phase, and this is a serious obstacle in designing the formulation of cosmetic preparations.

The present invention has been made to solve the above-mentioned new technical problems, and an object of the present invention is to provide a cosmetic which can stably disperse a large amount of an inorganic ultraviolet screening agent in an aqueous phase by suppressing the influence of a hydrophobic fine-particle metal oxide or a water-soluble component derived therefrom in the aqueous phase without impairing the thickening effect by a water-soluble thickener such as a carboxyvinyl polymer even when a large amount of the inorganic ultraviolet screening agent is blended, has high storage stability and ultraviolet screening performance of the cosmetic, does not impair the touch and use feeling of the cosmetic as much as possible, and has excellent water resistance of a film (cosmetic film).

Means for solving the problems

The present inventors have intensively studied to solve the above-mentioned problems, and as a result, they have found that a cosmetic having a structure in which a component (D) is dispersed in an aqueous phase can achieve the above-mentioned problems by containing (a) a carboxylic acid-modified silicone having a specific chain length and a side chain-modified structure, (B) a water-soluble thickener, (C) a basic compound, and (D) an inorganic ultraviolet screening agent composed of a hydrophobic particulate metal oxide, and have accomplished the present invention. In particular, by using the above-mentioned component (a) and component (B) in combination in a cosmetic containing hydrophobized fine-particle zinc oxide as the component (D), an inorganic ultraviolet screening agent can be stably dispersed in an aqueous phase without adverse effects such as a decrease in the viscosity of the whole cosmetic, and a cosmetic having excellent storage stability, high ultraviolet screening performance, high appearance, excellent feeling in use, and excellent water resistance of a film (cosmetic film) can be realized.

Namely, the object of the present invention is achieved by the following cosmetic materials:

[1] a cosmetic material, comprising:

(A) a carboxylic acid-modified silicone which is liquid at room temperature (25 ℃) and represented by the following structural formula (1),

[ chemical formula 1]

(in the formula, wherein,

rc represents the formula-R¹-(OR²)p-(O)w-R³A carboxyl group-containing organic group (R) represented by-COOH¹Represents a linear or branched alkylene group having 2 to 22 carbon atoms, R²Represents a linear or branched alkylene group having 2 to 4 carbon atoms, R³Represents a bond (-), or a linear or branched alkylene group having 1 to 22 carbon atoms, p represents a number of 0 to 200, w represents a number of 0 or 1),

r are the same or different and each represents an alkyl group or an alkoxy group having 1 to 22 carbon atoms or a phenyl group,

r' is Rc or R,

a. b is positive, a + b is a number in the range of 2 to 20, and a/b is in the range of 0.3 to 3.0);

(B) a water-soluble tackifier;

(C) a basic compound; and

(D) an inorganic ultraviolet screening agent comprising a hydrophobic fine-particle metal oxide,

the cosmetic has a structure in which the component (D) is dispersed in an aqueous phase.

Preferably, this is achieved by:

[2] the cosmetic according to [1], which is characterized in that,

the water-soluble thickener as the component (B) contains one or more selected from the following substances:

(b1) a carboxyvinyl polymer,

(b2) Acrylic copolymer polymer or salt thereof,

(b3) Alkyl polyoxyethylene acrylic acid/methacrylate copolymer polymer,

(b4) Polyacrylamide and

(b5) water-soluble natural polysaccharide polymers.

The object of the present invention is more preferably achieved by the following cosmetic materials.

[3] The cosmetic preparation according to [1] or [2], wherein,

the inorganic ultraviolet screening agent as the component (D) contains (D1) hydrophobized fine particle titanium oxide or hydrophobized fine particle zinc oxide having an average particle diameter in the range of 1 to 200 nm.

[4] The cosmetic according to any one of [1] to [3], wherein,

the inorganic ultraviolet screening agent as the component (D) contains at least (D1-1) hydrophobized fine particle zinc oxide having an average particle diameter in the range of 1 to 200 nm.

[5] The cosmetic according to any one of [1] to [4], characterized in that,

the inorganic ultraviolet screening agent as the component (D) is blended in the cosmetic in the form of a powder dispersion obtained by mixing all or a part of the component (a) in advance.

[6] The cosmetic according to any one of [1] to [5], further comprising (E) an oil agent.

[7] The cosmetic according to [6], wherein the (E) oil agent comprises at least one ultraviolet absorber.

[8] The cosmetic according to any one of [1] to [7], wherein the cosmetic is an oil-in-water emulsion cosmetic.

[9] The cosmetic according to any one of [1] to [8], further comprising at least one selected from (F) an oil-soluble film-forming agent, (G) an alcohol, (H) a water-soluble ultraviolet absorber, and (I) a vinyl polymer emulsion.

[10] The cosmetic according to any one of [1] to [9], wherein the cosmetic is a sunscreen cosmetic.

Advantageous effects

The cosmetic of the present invention can provide a cosmetic which can suppress the influence of a hydrophobic fine-particle metal oxide such as hydrophobic fine-particle zinc oxide or a water-soluble component derived therefrom, does not impair the thickening effect of a water-soluble thickener such as a carboxyvinyl polymer even when a large amount of an inorganic ultraviolet screening agent is blended, can stably disperse a large amount of an inorganic ultraviolet screening agent in an aqueous phase, has high storage stability and ultraviolet screening performance, does not impair the touch and use feeling of a cosmetic as much as possible, and has excellent water resistance of a film (cosmetic film) or the like. Therefore, the present invention can provide a sunscreen cosmetic composition and the like having an improved degree of freedom in formulation design and having properties such as water resistance, a feeling in use, and ultraviolet protection properties represented by SPF values.

The cosmetic of the present invention is excellent in stability in that it does not cause phase separation with time and maintains a uniform appearance, storage stability as a preparation, and also remarkably excellent in water resistance of a film (cosmetic film).

In addition, since the cosmetic of the present invention contains the component (a) and the component (C), the formed cosmetic film has an advantage that it can be easily removed by using a common soap and water.

Detailed Description

The oil-in-water emulsion cosmetic of the present invention will be described in detail below.

The invention takes the following situations as one of the main technical effects: in an oil-in-water emulsion cosmetic containing (D) an inorganic ultraviolet screening agent composed of a hydrophobic particulate metal oxide, by using (A) a carboxylic acid-modified silicone having a specific structure, (B) a water-soluble thickener, and (C) a basic compound in combination, it is possible to suppress the influence of the inorganic ultraviolet screening component which is the hydrophobic particulate metal oxide and the water-soluble component derived therefrom in the aqueous phase, to stably and uniformly disperse a large amount of the inorganic ultraviolet screening agent in the aqueous phase, and to hardly cause problems such as a decrease in the viscosity of the cosmetic.

[ (A) Carboxylic acid-modified Silicone ]

The cosmetic of the present invention comprises at least one carboxylic acid-modified silicone (A) which is liquid at room temperature (25 ℃) and has a specific chemical structure. The carboxylic acid-modified silicone (a) is preferably in a liquid state at room temperature (25 ℃) and 1 atmosphere. This is because the carboxylic acid-modified silicone which is liquid at room temperature (25 ℃) has a high function as a surfactant and is easily mixed with a water-soluble thickener and water as the component (B).

The carboxylic acid-modified silicone (A) is represented by the following structural formula (1).

[ chemical formula 2]

(in the formula, wherein,

rc represents the formula-R¹-(OR²)p-(O)w-R³A carboxyl group-containing organic group (R) represented by-COOH¹Represents a linear or branched alkylene group having 2 to 22 carbon atoms, R²Represents a linear or branched alkylene group having 2 to 4 carbon atoms, R³Represents a bond (-), or a linear or branched alkylene group having 1 to 22 carbon atoms, p represents a number of 0 to 200, w represents a number of 0 or 1),

r are the same or different and each represents an alkyl group or an alkoxy group having 1 to 22 carbon atoms or a phenyl group,

r' is Rc or R,

a. b is each a positive number, preferably a.gtoreq.2, furthermore, preferably b.gtoreq.2,

a + b is a number in the range of 2 to 20, preferably 2 to 15, more preferably 2 to 10,

a/b is in the range of 0.3 to 3.0, preferably 0.3 to 2.5, more preferably 0.3 to 2.0, and still more preferably 0.5 to 2.0. )

In the general formula representing the carboxyl group-containing organic group in the structural formula (1), R¹The alkylene group is a linear or branched alkylene group having 2 to 22 carbon atoms, preferably 2 to 12 carbon atoms, and particularly preferably 2 to 10 carbon atoms, and examples thereof include ethylene, propylene, trimethylene, butylene, pentamethylene, hexamethylene, heptamethylene, octamethylene, nonamethylene, decamethylene, undecamethylene, dodecamethylene, tridecamethylene, tetradecamethylene, pentadecamethylene, and hexadecamethylene.

Further, as R²Examples of the linear or branched alkylene group having 2 to 4 carbon atoms include: ethylene, propylene, trimethylene and butylene, and ethylene is particularly preferred.

As R³Examples of the linear or branched alkylene group having 1 to 22 carbon atoms include: methylene, ethylene, ethylidene, propylene, trimethylene, tetramethylene, pentamethylene, hexamethylene, heptamethylene, octamethylene, nonamethylene, decamethylene, undecamethylene, dodecamethylene, tridecamethylene, tetradecamethylene, pentadecamethylene, hexadecamethylene and the like, among which a group having 1 to 12 carbon atoms is preferable, and R is particularly preferable¹And R³The sum of the carbon atoms of (a) is 2 to 22.

p represents a number of 0 to 200, preferably a number of 0 to 20, particularly preferably a number of 0 to 10. W represents a number of 0 or 1, but is preferably 0. When p and w are both 0, the carboxyl group-containing organic group is represented by the formula- (C)_nH_2n) -COOH preferably has a structure in which a carboxyl group is bonded to a silicon atom via a linear or branched alkylene group having 3 to 44 carbon atoms. In the formula, n is a number of 3 to 44, preferably a number of 3 to 20, and particularly preferably a number of 3 to 16.

The carboxylic acid-modified silicone (a) represented by the structural formula (1) is not particularly limited as long as it is an organosiloxane in which at least one carboxyl group-containing organic group is introduced into a side chain or a terminal. Preferably, the carboxyl-containing organic group is introduced into the side chain of the organosiloxane.

Therefore, examples of the carboxylic acid-modified silicone (a) represented by the structural formula (1) include: carboxylic acid-modified silicones in which a carboxyl-containing organic group is grafted as a side chain on a silicone main chain; a carboxylic acid-modified silicone having a carboxyl group-containing organic group added to one end of a silicone main chain; carboxylic acid-modified silicones having carboxyl-containing organic groups added to both ends of a silicone main chain; carboxylic acid-modified silicones having carboxyl-containing organic groups added to both ends of the silicone main chain and further grafted with carboxyl-containing organic groups as side chains; and optionally a carboxylic acid-modified silicone having a long-chain alkyl group having 6 or more carbon atoms. Most preferably, a carboxylic acid-modified silicone having a silicone backbone grafted with a carboxyl group-containing organic group as a side chain is used. The carboxylic acid-modified silicone has a long-chain alkyl group, and thus the blending stability with an organic oil agent such as a hydrocarbon oil or an organic cosmetic raw material (particularly, a UV absorber) may be improved.

As the (a) carboxylic acid-modified silicone represented by structural formula (1), it is preferable that R' is R and a carboxylic acid group represented by the general formula: -R¹-(OR²)p-(O)w-R³-carboxylic acid-modified silicones containing carboxylic organic groups represented by COOH; more preferably a carboxylic acid-modified silicone in which R' is R and which has a plurality of the carboxyl group-containing organic groups in the silicone side chain; still more preferably, the carboxylic acid-modified silicone has a plurality of the carboxyl group-containing organic groups in the silicone side chain, and a/b is 1.

In the structural formula (1), R is preferably a methyl group, an alkoxy group or a phenyl group, but may partially have a long-chain alkyl group having 6 to 22 carbon atoms from the viewpoint of the stability of blending with an organic oil agent such as a hydrocarbon oil or an organic cosmetic raw material (particularly, a UV absorber).

In the present invention, the carboxylic acid-modified silicone can be produced by a known method, for example, a method in which a dimethylpolysiloxane having an Si — H group and an unsaturated carboxylic acid ester compound are subjected to an addition reaction under a platinum catalyst, and further saponified to produce a carboxylic acid; a method in which dimethylpolysiloxane having Si-H groups is subjected to an addition reaction with a silicon alkyl unsaturated carboxylate or a silicon alkyl allyloxycarboxylate under a platinum catalyst, and after the reaction, a target compound is obtained by hydrolysis; and a method of obtaining a carboxylic acid-modified silicone having both terminals by an equilibration reaction using bis (hydroxycarbonylethyl) tetramethyldisiloxane, a cyclic siloxane and an acidic catalyst (silicone Handbook, ita shogao sho, japan press, pp 166 to 167). In particular, a commercially available carboxylic acid-modified silicone such as ES-5800 Formulation Aid (manufactured by Dow Toray Co., Ltd.) is a preferred carboxylic acid-modified silicone in the present invention.

In the present invention, the carboxylic acid-modified silicone as the component (a) is a component that functions as a surfactant, and at the same time, by using the carboxylic acid-modified silicone together with (B) a water-soluble thickener and (C) a basic compound, it is possible to form (D) an aqueous dispersion in which an inorganic ultraviolet screening agent composed of a hydrophobic particulate metal oxide is stably and uniformly dispersed in an aqueous phase even in the presence of a hydrophobic particulate titanium oxide, a hydrophobic particulate zinc oxide, or the like, or a water-soluble component derived therefrom and present in the aqueous phase. On the other hand, in the case where a carboxylic acid-modified silicone is not used or a carboxylic acid-modified silicone other than the structural formula (1) is used, even when the component (B) and the component (C) are used, a stable aqueous dispersion may not be formed particularly in a formulation of a cosmetic containing hydrophobized fine particulate zinc oxide. In addition, in the case of using a carboxylic acid-modified silicone other than the structural formula (1), even if the above-mentioned component (B) and component (C) are used, the water resistance and sebum resistance of the resulting film (i.e., cosmetic film) may be insufficient.

In the cosmetic material of the present invention, particularly an oil-in-water type cosmetic material, the carboxylic acid-modified silicone (a) is contained preferably in an amount of 0.1 to 15% by mass, more preferably in an amount of 0.2 to 10% by mass, and still more preferably in an amount of 0.2 to 7.5% by mass, based on the total mass of the cosmetic material.

In the cosmetic of the present invention, when the inorganic ultraviolet screening agent (D) comprising a hydrophobic particulate metal oxide is uniformly and stably dispersed in an aqueous phase, the component (a) is preferably contained in an amount falling within a range of 5 to 40 parts by mass, and particularly preferably contained in an amount falling within a range of 7.5 to 35 parts by mass, relative to 100 parts by mass of the component (D). When the component (a), the component (B) and the component (C) are used together within the above range, the component (D) is stably dispersed in the aqueous phase for a long period of time, and a film having good storage stability, good water resistance and good sebum resistance (i.e., a cosmetic film) is provided.

On the other hand, in the cosmetic of the present invention, when the amount of the surfactant other than the carboxylic acid-modified silicone of the specific structure (a) is small or when no other surfactant is contained, the water resistance of the cosmetic film obtained by the cosmetic of the present invention may be further improved. For example, if the content of the surfactant other than the carboxylic acid-modified silicone (a) is less than 5% by mass based on the total mass of the cosmetic composition, the water resistance of the cosmetic film may be further improved by using the hydrophobic powder as the component (D) in combination. In particular, from the viewpoint of improving the water resistance of the cosmetic film, the content of the surfactant other than the carboxylic acid-modified silicone (a) is favorably small, and is preferably 3% by mass or less, more preferably 2% by mass or less, and still more preferably 1% by mass or less. In the cosmetic of the present invention, it is most preferable that the surfactant other than the (a) carboxylic acid-modified silicone is not contained at all.

[ (B) Water-soluble tackifier ]

The component (B) is a water-soluble thickener, and is a component which suppresses the influence of the water-soluble component derived from the hydrophobized fine particle powder by using the carboxylic acid-modified silicone having the specific structure of the above-mentioned component (a) in combination, and which can adjust the viscosity and the feeling of use of the preparation, and realize a stable dispersed state in the aqueous phase of the inorganic ultraviolet screening agent and further improve the storage stability of the cosmetic even when a large amount of the inorganic ultraviolet screening agent is blended.

In the present invention, particularly, the cosmetic composition contains hydrophobized fine particles of zinc oxide and Zn in the aqueous phase²⁺In the case of (2), from the viewpoint of effecting stable dispersion of the component (D) in the aqueous phaseIn view of this, it is particularly preferable to select a specific combination of the carboxylic acid-modified silicone having the specific structure of the component (a) and the component (B). Specifically, the water-soluble thickener as the component (B) preferably contains at least one selected from the group consisting of (B1) carboxyvinyl polymers, (B2) acrylic acid copolymer polymers or salts thereof, (B3) alkylpolyoxyethylene acrylic acid/methacrylate copolymer polymers, (B4) polyacrylamides, and (B5) water-soluble natural polysaccharide polymers. By using a water-soluble thickener selected from the group consisting of (b1) to (b5) in combination with the component (a), a part or all of the component (D) is hydrophobized fine particle zinc oxide, and the amount thereof to be added is large, so that even when the hydrophobized fine particle zinc oxide and a water-soluble component derived therefrom are contained in a large amount in the aqueous phase, the component (D) can be stably and uniformly dispersed in the aqueous phase, the storage stability of the cosmetic is improved, and the water resistance and sebum resistance of the obtained cosmetic film are not impaired. In the case of a carboxylic acid-modified silicone which does not conform to the component (a), the above-described technical effects may not be achieved.

Among the water-soluble thickeners as the component (B), the acrylic copolymer polymer (B2) or a salt thereof and the polyacrylamide (B4) are components to be blended in the phase transition type composite raw material product in addition to the thickening effect of the aqueous phase.

(b1) Carboxyvinyl polymer refers to a polymer of acrylic acid after crosslinking (INCI name: carbomer). As the carboxyvinyl polymer, there may be used, specifically, commercially available products such as Carbopol 910, 934, 940, 941, 980, 2984, ETD 2050, Ultrez 10 (as described above, manufactured by Lubrizol Advanced Materials Co., Ltd.), HIVISWAKO 103, 104, 105 (as described above, manufactured by Wako K.K.), AQUPEC HV-505E, HV-805EG (as described above, manufactured by Sumitomo refining Co., Ltd.), and carboxyvinyl polymers modified with an alkyl group or the like. Specifically, examples of the modified acrylic acid/methacrylic acid styrene/alkylene ester copolymer polymer include an acrylic acid/alkyl methacrylate copolymer polymer and an acrylic acid/methacrylic acid styrene copolymer polymer. More specifically, the acrylic acid/alkyl methacrylate copolymer polymer is a copolymer of acrylic acid and an alkyl methacrylate having 10 to 30 carbon atoms (INCI name: (acrylic acid ester/alkyl acrylate (C10-30)) crosslinked polymer), and commercially available products such as Pemulen TR-1, TR-2, Carbopol ETD 2020, 1382, Ultrez 20, 21 (above, manufactured by Lubrizol Advanced Materials Co., Ltd.), AQUPEC HV-501ER, HV-701EDR (above, manufactured by Sumitomo refining Co., Ltd.) and the like can be used.

Examples of the acrylic copolymer polymer (b2) or a salt thereof include polyacrylic acid and sodium polyacrylate. As the sodium polyacrylate, for example, ACULYN as a composite raw material available from Dow Toray corporation can be used^TMRM2051 Thick Agents (sodium polyacrylate, polydimethylsiloxane, cyclopentasiloxane, trideceth-6, PEG/PPG-18/18 polydimethylsiloxane), and the like. Similarly, examples of the other acrylic copolymer polymer or its salt include an ammonium dimethyltaurate/vinylpyrrolidone (acrylic acid), a crosslinked ammonium dimethyltaurate/behenyl polyether-25 methacrylate (acrylic acid/sodium dimethyltaurate), and a copolymer of Aristoflex AVC (Clariant Co., Ltd.), Aristoflex HMB (Clariant Co., Ltd.), and SEPIGEL EG (SePPIC Co., Ltd.) ACULYN^TMCommercially available products such as Siltouch Rheology Modifier (manufactured by Dow Co., Ltd.).

(b3) The alkyl polyoxyethylene acrylic acid/methacrylic acid ester copolymer polymer is a polyoxyethylene alkyl ether of a copolymer of acrylic acid and alkyl methacrylate having 10 to 30 carbon atoms, and alkyl acrylate/alkyl methacrylate/polyoxyethylene (20) stearyl ether and the like can be used. As these alkyl polyoxyethylene acrylic acid/methacrylic acid ester copolymer polymers, ACULYN (ACULYN) can be used^TM)22, 28, 33A, 38, 44, 88, EXCEL (manufactured by Dow corporation, mentioned above) and the like.

(b4) Examples of the polyacrylamide include a crosslinked copolymer of 2-acrylamido-2-methylpropanesulfonic acid, and SEPIGEL 305 (polyacrylamide, hydrogenated polyisobutene, laureth-7, water; containing 40 mass% of polyacrylamide) and SEPIGEL 501 (polyacrylamide, polysorbate 85, mineral oil, isoparaffin; containing 20 mass% of polyacrylamide) which are composite raw materials available from SEPPIC are used.

Examples of the water-soluble natural polysaccharide polymer (b5) include carrageenan, agar, furcellaran, guar gum, tamarind seed gum, dextrin, starch, locust bean gum, arabinogalactan, pectin, wheat protein, soybean protein, chitosan, chondroitin sulfate, hyaluronic acid, sodium hyaluronate, acetylated sodium hyaluronate, hydrolyzed hyaluronic acid, albumin, gelatin, casein, soluble collagen, curdlan, xanthan gum, gellan gum, cyclodextrin, dextran, pullulan, crystalline cellulose, methyl cellulose, ethyl cellulose, carboxymethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, cationized cellulose, carboxymethyl starch, methyl starch, soluble starch, starch phosphate, propylene glycol alginate, cationized guar gum, acid, chitosan, acetylated polysaccharide, chitosan, casein, chitosan, modified starch such as hydroxypropylated guar gum, modified potato starch, and hydroxypropyl starch phosphate, and preferable examples thereof include xanthan gum, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, and methyl cellulose.

As other water-soluble thickeners, water-soluble thickeners commonly used in cosmetics can be used. Specific examples thereof include polyethylene glycol, polyoxyethylene polyoxypropylene block copolymer, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl methyl ether and the like.

The amount of the water-soluble thickener (B) in the cosmetic of the present invention is not particularly limited, but is preferably 0.01 to 5% by mass, more preferably 0.05 to 2% by mass, and still more preferably 0.1 to 2% by mass, based on the total mass of the cosmetic. By selectively using the component (a) and the component (B) in combination in the cosmetic of the present invention in the above-mentioned mass range in the presence of the component (C) described later, the influence of the hydrophobic particulate metal oxide dispersed in the aqueous phase or the water-soluble component derived therefrom can be suppressed, and the component (D) can be dispersed in the aqueous phase in a large amount and stably. If the amount of the component (B) used is less than the lower limit, the dispersion stability of the component (D) in the aqueous phase may be impaired.

[ (C) basic Compound ]

The cosmetic of the present invention comprises at least one (C) basic compound. The component (C) can anionize the carboxylic acid-modified site of the carboxylic acid-modified silicone (a) and improve the function of the carboxylic acid-modified silicone (a) as a surfactant. In particular, the oil-in-water type emulsion cosmetic of the present invention contains (D) an inorganic ultraviolet screening agent composed of a hydrophobic fine-particle metal oxide, but by using the above-mentioned component (a) and component (C) in combination, the component (D) can be dispersed well in the aqueous phase of the cosmetic of the present invention as compared with the component (a) alone, and not only storage stability and film-forming property of the whole cosmetic are improved, but also formation of an aqueous dispersion structure in which the component (D) is stably dispersed in a large amount in the aqueous phase is facilitated.

The basic compound used in the present invention is not particularly limited as long as it exhibits basicity when dissolved in water, and various inorganic compounds and organic compounds can be used. One or more basic compounds may be added.

Examples of the organic compound include: monoethanolamine, triethanolamine, 2-amino-2-methyl-1, 3-propanediol, aminomethylpropanol, arginine, guanidine, and the like.

Examples of the inorganic compound include: sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, calcium hydroxide, calcium carbonate, ammonia, and the like, among which potassium hydroxide can be particularly preferably used.

The amount of the basic compound to be blended in the cosmetic composition of the present invention is not particularly limited, and in the case of a monobasic base, the ratio of carboxylic acid group/monobasic base (molar ratio) is preferably 1/0.5 to 1/1.5, based on 1 mole of carboxylic acid group contained in the carboxylic acid-modified silicone to be blended.

The pH of the cosmetic of the present invention may be acidic or basic, but from the viewpoint of anionizing the carboxylic acid-modified portion of the carboxylic acid-modified silicone (a) and improving dispersibility in the hydrophobic powder containing the component (D), the pH is preferably weakly basic, specifically, preferably in the range of 7.1 to 9.5, and more preferably in the range of 7.2 to 8.5.

[ (D) inorganic UV-screening agent composed of hydrophobic particulate metal oxide ]

The cosmetic of the present invention is characterized by containing an inorganic ultraviolet screening agent composed of a hydrophobic fine-particle metal oxide, and being capable of stably dispersing a large amount of the inorganic ultraviolet screening agent in an aqueous phase because the thickening effect by the component (B) is not impaired even if the hydrophobic fine-particle metal oxide and a water-soluble component derived from the metal oxide are present in the aqueous phase. In general, when a hydrophobic fine-particle metal oxide or a water-soluble component derived therefrom is present as the component (D) in the aqueous phase, the viscosity of the entire preparation is lowered even when the component (B) is used, and uniform dispersion of these inorganic ultraviolet screening agents is difficult, but by using the components (a) and (C) in combination, a cosmetic which can stably disperse a large amount of inorganic ultraviolet screening agents in the aqueous phase, has high ultraviolet screening performance, does not impair the touch and feel of use of the cosmetic as much as possible, and has excellent water resistance of a film (cosmetic film) and the like can be provided.

In particular, the technical common knowledge of the person skilled in the art is as follows: in the cosmetic containing hydrophobized fine particle zinc oxide as the component (D), even if the component (B) is used, the overall viscosity of the preparation is lowered, and thus the degree of freedom of the formulation is greatly impaired, but it is unexpected that, when the component (a) of the present invention is used, a cosmetic having excellent ultraviolet ray shielding performance, touch and feeling in use can be designed in which hydrophobized fine particle zinc oxide is stably dispersed in an aqueous phase.

That is, the present invention can form an aqueous dispersion in which a component (D) such as hydrophobized fine particles of zinc oxide is stably dispersed in a large amount in an aqueous phase by selectively using the component (a) in combination with the component (B), and therefore has the following advantages: the cosmetic composition has excellent effects of isolating UV-B waves (having a wavelength of 280-315 nm) and can realize a high SPF value as the whole cosmetic composition without impairing the appearance, the feeling of use, the storage stability and the like of the cosmetic composition. Further, the component (D) in the present invention can be dispersed in the aqueous phase and the oil phase, but by using the above-mentioned basic compound (C), the state of being well dispersed in the aqueous phase of the oil-in-water type emulsion cosmetic is obtained, and the feeling of use as a cosmetic, the ultraviolet shielding effect, and the cleaning property by soap and the like are further improved.

The component (D) of the present invention is a hydrophobized metal oxide, and is an inorganic ultraviolet screening agent having an ultraviolet screening effect. As such component (D), one or two or more kinds of inorganic ultraviolet screening agents selected from hydrophobized particulate titanium oxide and hydrophobized particulate zinc oxide are exemplified, but from the viewpoint of achieving the specific effect of the present invention, at least a part of component (D) is preferably hydrophobized particulate zinc oxide. Here, the particle diameter of the hydrophobized particulate titanium oxide or the hydrophobized particulate zinc oxide is preferably 1 to 200nm, more preferably 10 to 80nm, from the viewpoint of the ultraviolet shielding effect and the dispersibility. Preferably, the component (D) contains at least (D1-1) hydrophobized fine particulate zinc oxide having an average particle diameter in the range of 1 to 200 nm.

The hydrophobizing treatment in the component (D) is not particularly limited, but means that the powder is treated with various hydrophobizing surface-treating agents. Examples of the hydrophobic treatment include organosiloxane treatments such as Methylhydrogenpolysiloxane (METHICONE) treatment in japanese cosmetic display name, polydimethylsiloxane/METHICONE) copolymer (hydrogenated polydimethylsiloxane in japanese cosmetic display name), dimethylpolysiloxane (polydimethylsiloxane in japanese cosmetic display name), silicone resin treatment, silicone gum treatment, acrylic silicone treatment, and fluorinated silicone treatment; metal soap treatment such as zinc stearate treatment; silane treatments such as silane coupling agent treatment and alkylsilane treatment; fluorine compound treatments such as perfluoroalkylsilane, perfluoroalkylphosphate, and perfluoropolyether treatments; amino acid treatment such as N-lauroyl-L-lysine treatment; oil solution treatment such as squalene treatment; acrylic acid treatment such as alkyl acrylate treatment, and the like, and two or more of them may be used in combination.

Among these treatments, treatments based on silicone compounds are preferable from the viewpoint of water resistance and ease of dispersion based on carboxylic acid-modified silicone, and among them, treatments based on methylhydrogenpolysiloxane, (polydimethylsiloxane/polymethylsiloxane) copolymer, dimethylpolysiloxane, and alkylsilane are particularly preferable.

Here, the carboxylic acid-modified silicone having a specific structure as the component (a) functions as a surfactant, and therefore, it can be used as a powder dispersant for the component (D) and the like, and can further improve the dispersion state of the component (D) in the final cosmetic preparation. Specifically, in the case of producing the cosmetic of the present invention, it is particularly preferable that the inorganic ultraviolet screening agent as the component (D) is blended in the cosmetic in the form of a powder dispersion (slurry) obtained by mixing all or a part of the component (a) in advance. In this case, the component (a) is used on the side having the surface treatment agent as the component (D), and therefore the dispersion state of the component (D) in the aqueous phase is further improved.

The amount of component (D) in the cosmetic of the present invention is not particularly limited, but is preferably 1 to 40% by mass, more preferably 2 to 35% by mass, and still more preferably 5 to 20% by mass, based on the total mass of the cosmetic. As described above, the larger the amount of component (D) is blended, the higher the SPF value of the cosmetic is in general, and even if component (B) is used, the viscosity of the whole preparation tends to be deteriorated due to the influence of the hydrophobic fine-particle metal oxide of component (D) or the water-soluble component derived therefrom, and the deterioration of appearance and the reduction of storage stability are caused by the separation of the cosmetic, and the use feeling specific to the cosmetic is also deteriorated. The preferred amounts of the components (a) and (B) are as described above based on 100 parts by mass of the component (D).

[ other hydrophobic powders ]

The cosmetic of the present invention may optionally contain a hydrophobic powder other than the component (D). These powders contain white and coloring pigments, extender pigments. White and colored pigments are used for coloring and the like of cosmetics, and on the other hand, extender pigments are used for improving the touch and the like of cosmetics. When the surface of the powder itself is not hydrophobic, the surface is subjected to a hydrophobic treatment in the same manner as the component (D). These hydrophobic powders may be combined with each other. As described above, in the present invention, the influence of the hydrophobic fine-particle metal oxide or the water-soluble component derived therefrom present in the aqueous phase on the viscosity of the preparation is suppressed, and therefore, a cosmetic material which suppresses the influence of the fine-particle metal oxide powder other than the component (D) or the water-soluble component derived therefrom of the same kind or similar type on the preparation, and which has excellent appearance, storage stability, and cosmetic film performance can be provided.

The shape (spherical, rod-like, needle-like, plate-like, amorphous, spindle-like, etc.), particle diameter (aerosol, fine particle, pigment grade, etc.), and particle structure (porous, non-porous, etc.) of the powder are not limited at all, but the average primary particle diameter is preferably in the range of 1nm to 100 μm.

Examples of the hydrophobic powder other than the component (D) include inorganic powder, organic powder, surfactant metal salt powder (metal soap), colored pigment, pearlescent pigment, metal powder pigment, and the like, and a composite of these may be used. Specific examples of the inorganic powder include zirconium oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, talc, mica, kaolin, sericite, muscovite, synthetic mica, phlogopite, lepidolite, biotite, lepidolite (lepidolite), silicic acid, silicic anhydride, aluminum silicate, sodium magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, metal tungstate, hydroxyapatite, vermiculite (vermiclite), HIGILITE (specially processed aluminum hydroxide), bentonite, montmorillonite, hectorite, zeolite, ceramic powder, calcium hydrogen phosphate, aluminum oxide, aluminum hydroxide, boron nitride, and the like; examples of the organic powder include polyamide powder, polyester powder, polyethylene powder, polypropylene powder, polystyrene powder, polyurethane powder, benzoguanamine powder, polymethylbenzoguanamine powder, polytetrafluoroethylene powder, polymethyl methacrylate powder, cellulose, silk powder (silk powder), nylon powder, 12 nylon, 6 nylon, silicone powder, polymethylsilsesquioxane spherical powder, styrene/acrylic acid copolymer, divinylbenzene/styrene copolymer, vinyl resin, urea resin, phenol resin, fluororesin, silicone resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, microcrystalline fiber powder, starch powder, lauroyl lysine, and the like; examples of the surfactant metal salt powder include zinc stearate, aluminum stearate, calcium stearate, magnesium stearate, zinc myristate, magnesium myristate, zinc palmitate, zinc laurate, zinc cetyl phosphate, calcium cetyl phosphate, and sodium zinc cetyl phosphate; examples of the colored pigment include an inorganic red pigment such as red iron oxide, iron hydroxide, and iron titanate, an inorganic brown pigment such as γ ー iron oxide, an inorganic yellow pigment such as yellow iron oxide and yellow soil, an inorganic black pigment such as black iron oxide and carbon black, an inorganic violet pigment such as manganese violet and cobalt violet, an inorganic green pigment such as chromium hydroxide, chromium oxide, cobalt oxide, and cobalt titanate, an inorganic blue pigment such as prussian blue and ultramarine blue, and red No. 3, red No. 104, red No. 106, red No. 201, red No. 202, red No. 204, red No. 205, red No. 220, red No. 226, red No. 227, red No. 228, red No. 230, red No. 401, red No. 505, yellow No. 4, yellow No. 5, yellow No. 202, yellow No. 203, yellow No. 204, yellow No. 401, blue No. 1, blue No. 2, blue No. 201, blue No. 404, green No. 3, and No. 2, Examples of the colorant include a colorant obtained by laking tar-based colorants such as green 201, green 204, green 205, orange 201, orange 203, orange 204, orange 206, and orange 207, and a colorant obtained by laking natural colorants such as carminic acid, laccaic acid, carthamin (carthamin), Brazilin, and crocin (crocin); examples of the pearl pigment include titanium oxide-coated mica, titanium mica, iron oxide-treated titanium mica, titanium oxide-coated mica, bismuth oxychloride, titanium oxide-coated talc, fish scale foil, titanium oxide-coated colored mica, and the like; examples of the metal powder pigment include metal powders of aluminum, gold, silver, copper, platinum, stainless steel, and the like.

As the hydrophobic powder, silicone elastomer powder may also be used. The silicone elastomer powder is a crosslinked product of a linear diorganopolysiloxane composed mainly of diorganosiloxy units (D units), and can be preferably obtained by causing a crosslinking reaction between an organohydrogenpolysiloxane having a silicon-bonded hydrogen atom in a side chain or a terminal and a diorganopolysiloxane having an unsaturated hydrocarbon group such as an alkenyl group in a side chain or a terminal in the presence of a hydrosilylation catalyst. The silicone elastomer powder is softer and more elastic than a silicone resin powder containing T units and Q units, and has excellent oil absorbency, and therefore can absorb oil on the skin and prevent removal of makeup.

The silicone elastomer powder may take various shapes such as a spherical shape, a flat shape, and an amorphous shape. The silicone elastomer powder may be in the form of an oil dispersion. The cosmetic material of the present invention is a silicone elastomer powder having a particle shape, and the primary particle diameter obtained by observation with an electron microscope and/or the average primary particle diameter measured by a laser desorption/scattering method falls within a range of 0.1 to 50 μm, and the shape of the primary particle may be preferably blended with a spherical silicone elastomer powder. The hardness of the silicone elastomer constituting the silicone elastomer powder is preferably 80 or less, more preferably 65 or less, by a type a durometer in JIS K6253 "hardness test methods for vulcanized rubber and thermoplastic rubber". These silicone elastomer powders may be optionally surface-treated with silicone resin, silica, or the like.

The amount of the hydrophobic powder other than the component (D) is not particularly limited, but the total amount of the component (D) and the hydrophobic powder is preferably 0.1 to 40% by mass, more preferably 0.1 to 35% by mass, and still more preferably 1 to 20% by mass, based on the total mass of the cosmetic.

The component (D) and the hydrophobic powder other than the component (D) may be dispersed in the oil phase and/or the aqueous phase, but in the present invention, the basic compound (C) is used, and these hydrophobic powder components are well dispersed in the aqueous phase. When the polyol (G) described later is used, these hydrophobic powders can be dispersed more uniformly in the aqueous phase. Further, since the component (a) functions as a powder dispersant as described above, the component (D) and the hydrophobic powder other than the component (D) can be incorporated in the cosmetic in the form of a powder dispersion by utilizing a part or the whole of the component (a).

[ (E) oil preparation ]

The cosmetic of the present invention may contain at least one (E) oil agent. The oil forms an oil phase in the cosmetic of the present invention. In this case, the cosmetic of the present invention may be in the form of an oil-in-water emulsion cosmetic, and is preferable.

The "oil agent" in the present invention is a substance generally used as a component of a cosmetic, and is not particularly limited. The oil agent is usually liquid at room temperature, but may be a solid such as wax, or may be a highly viscous gel or paste, which will be described later.

The oil agent is preferably at least one selected from the group consisting of silicone oil, nonpolar organic compounds and low-polarity organic compounds, which is liquid at 5 to 100 ℃.

The silicone oil is hydrophobic, and the molecular structure thereof may be any of cyclic, linear, and branched. The viscosity of the silicone oil at 25 ℃ is usually 0.65 to 100000mm²The preferred range of the concentration is 0.65-10000 mm²(ii) a range of/s.

Examples of the silicone oil include linear organopolysiloxanes, cyclic organopolysiloxanes, and branched organopolysiloxanes. Among them, volatile linear organopolysiloxanes, cyclic organopolysiloxanes, and branched organopolysiloxanes are preferable.

More specifically, examples of the linear organopolysiloxane include: trimethylsiloxy-terminated dimethylpolysiloxane (dimethylsilicone having a low viscosity such as 2 mPas or 6 mPas or the like and a high viscosity such as 100 ten thousand mPas or the like) at both ends of the molecular chain, organohydrogenpolysiloxane, trimethylsiloxy-terminated methylphenylpolysiloxane at both ends of the molecular chain, trimethylsiloxy-terminated dimethylsiloxane/methylphenylsiloxane copolymer at both ends of the molecular chain, trimethylsiloxy-terminated diphenylpolysiloxane at both ends of the molecular chain, trimethylsiloxy-terminated dimethylsiloxane/diphenylsiloxane copolymer at both ends of the molecular chain, trimethylpentaphenyltrisiloxane, phenyl (trimethylsiloxy) siloxane, trimethylsiloxy-terminated methylalkylpolysiloxane at both ends of the molecular chain, trimethylsiloxy-terminated dimethylpolysiloxane/methylalkylsiloxane copolymer at both ends of the molecular chain, organopolysiloxane, and organopolysiloxane/methylalkylsiloxane copolymer, Trimethylsiloxy-terminated dimethylsiloxane/methyl (3,3, 3-trifluoropropyl) siloxane copolymer, α, ω -dihydroxypolydimethylsiloxane, α, ω -diethoxypolydimethylsiloxane, 1,1,1,3,5,5, 5-heptamethyl-3-octyltrisiloxane, 1,1,1,3,5,5, 5-heptamethyl-3-dodecyltrisiloxane, 1,1,1,3,5,5, 5-heptamethyl-3-hexadecyltrisiloxane, trimethylsiloxymethylsilane, trimethylsiloxyalkylsilane, tetratrimethylsiloxysilane, tetramethyl-1, 3-dihydroxydisiloxane, octamethyl-1, 7-dihydroxytetrasiloxane, Hexamethyl-1, 5-diethoxytrioxane, hexamethyldisiloxane, octamethyltrisiloxane, higher alkoxy-modified silicone, higher fatty acid-modified silicone, dimethylsiloxane, and the like.

Examples of the cyclic organopolysiloxane include: hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), 1-diethylhexamethylcyclotetrasiloxane, phenylheptamethylcyclotetrasiloxane, 1-diphenylhexamethylcyclotetrasiloxane, 1,3,5, 7-tetravinyltetramethylcyclotetrasiloxane, 1,3,5, 7-tetramethylcyclotetrasiloxane, 1,3,5, 7-tetracyclohexyltetramethylcyclotetrasiloxane, tris (3,3, 3-trifluoropropyl) trimethylcyclotrisiloxane, 1,3,5, 7-tetrakis (3-methacryloxypropyl) tetramethylcyclotetrasiloxane, 1,3,5, 7-tetrakis (3-acryloyloxypropyl) tetramethylcyclotetrasiloxane, 1,3,5, 7-tetrakis (3-carboxypropyl) tetramethylcyclotetrasiloxane, 1,3,5, 7-tetrakis (3-vinyloxypropyl) tetramethylcyclotetrasiloxane, 1,3,5, 7-tetrakis (p-vinylphenyl) tetramethylcyclotetrasiloxane, 1,3,5, 7-tetrakis [3- (p-vinylphenyl) propyl ] tetramethylcyclotetrasiloxane, 1,3,5, 7-tetrakis (N-acryloyl-N-methyl-3-aminopropyl) tetramethylcyclotetrasiloxane, 1,3,5, 7-tetrakis (N, N-bis (lauroyl) -3-aminopropyl) tetramethylcyclotetrasiloxane and the like.

Examples of the branched organopolysiloxane include methyltrimethylsiloxysilane, ethyltrimethylsiloxysilane, propyltrimethylsiloxysilane, tetratrimethylsiloxysilane, phenyltrimethylsiloxysilane, and the like.

As the nonpolar organic compound and the low-polarity organic compound, hydrocarbon oil and fatty acid ester oil are preferable. They are components which are widely used in particular as base materials for cosmetic preparations.

Examples of the hydrocarbon oil include: liquid paraffin, light liquid isoparaffin, heavy liquid isoparaffin, petrolatum, n-paraffin, isoparaffin, isododecane, isohexadecane, polyisobutylene, hydrogenated polyisobutylene, polybutene, ozokerite (ozokerite), ceresin (ceresin), microcrystalline wax, paraffin wax, polyethylene/polypropylene wax, squalane, squalene, pristane, polyisoprene, and the like.

Examples of the fatty acid ester oil include hexyldecyl octanoate, cetyl octanoate, isopropyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, oleyl oleate, decyl oleate, octyldodecyl myristate, hexyldecyl dimethyl octanoate, cetyl lactate, myristyl lactate, diethyl phthalate, dibutyl phthalate, acetylated lanolin, propylene glycol dioleate, tri-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, ditrimethylolpropane triethylhexanoate, ditrimethylolpropane (isostearic acid/sebacic acid) ester, trimethylolpropane tricaprylate, trimethylolpropane triisostearate, diisopropyl adipate, diisobutyl adipate, 2-hexyldecyl adipate, isopropyl myristate, hexyl myristate, octyl myristate, hexyl myristate, octyl palmitate, hexyl palmitate, and the like, Di-2-heptylundecyl adipate, diisostearyl malate, hydrogenated castor oil monoisostearate, octyldodecyl isostearate, isopropyl isostearate, isocetyl isostearate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, octyldodecyl gum, ethyl oleate, octyldodecyl oleate, neopentyl glycol didecanoate, triethyl citrate, 2-ethylhexyl succinate, dioctyl succinate, isocetyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, diethyl sebacate, dioctyl sebacate, dibutyl sebacate, cetyl palmitate, octyldodecyl palmitate, octyl palmitate, hydrogenated castor oil monoisostearate, octyl dodecyl isostearate, isopropyl isostearate, isocetyl 2-ethylhexanoate, octyl dodecanoate, ethyl oleate, octyl sebacate, dioctyl sebacate, cetyl palmitate, octyl palmitate, hydrogenated castor oil monostearate, octyl dodecanoate, isopropyl isostearate, isooctyl oleate, isocetyl stearate, isooctyl oleate, 2-ethyl oleate, octyl sebacate, octyl palmitate, and octyl palmitate, and the isopropyl palmitate, ethyl sebacate, ethyl stearate, and the like, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, cholesterol 12-hydroxystearate, dipentaerythritol fatty acid ester, 2-hexyldecyl myristate, ethyl laurate, 2-octyldodecyl N-lauroyl-L-glutamate, di (cholesterol/behenyl/octyldodecanol) N-lauroyl-L-glutamate, di (phytosterol/octyldodecanol) palmitate, di (glyceryl (N-L-palmitate, di (L-octyl-dodecanol) palmitate, di (L-laurate, di (L-glutamate), di (L-lauryl-L-glutamate) ester, di (phytosterol/octyldodecanol) palmitate, di (L-lauryl-L-glutamate), di-lauryl-L-glutamate), di-L-glutamate, di-lauryl-L-glutamate, di-L, N-lauroyl sarcosinate, diisostearyl malate, neopentyl glycol dicaprylate, isodecyl neopentanoate, isotridecyl neopentanoate, isostearyl neopentanoate, isononyl isononanoate, isotridecyl isononanoate, octyl isononanoate, isotridecyl isononanoate, diethylpentanediol dineopentanoate, methylpentanediol dineopentanoate, octyldodecyl neodecanoate, 2-butyl-2-ethyl-1, 3-propanediol dicaprylate, pentaerythritol tetracaprylate, pentaerythritol hydrogenated abietate, pentaerythritol triethylhexanoate, dipentaerythritol (hydroxystearic acid/stearic acid/abietic acid) ester, tetraisostearic acid polyglyceryl ester, nonaisostearic acid polyglyceryl-10, deca (erucic acid/isostearic acid/ricinoleic acid) polyglyceryl ester-8, (hexyldecanoic/sebacic acid) diglyceryl oligoester, distearyl glycol (ethylene glycol distearate), diisopropyl dimerate linoleate, diisostearyl alcohol dilinoleate, diisostearyl alcohol/phytosterol dilinoleate, (phytosterol/behenyl) dilinoleate, (phytosterol/isostearyl alcohol/cetyl alcohol/stearyl alcohol/behenyl alcohol) dilinoleate, dioleyl alcohol diisostearate, dilinoleate hydrogenated rosinate, dimerized linoleic acid cured castor oil, hydroxyalkyl dilinoleyl ether, triisocaprylic acid glyceride, triisostearic acid glyceride, trimyristin, triisopalmitic acid glyceride, trioctanoic acid glyceride, triolein, diisostearic acid glyceride, trioctanoic acid, tricaprylic acid/capric acid glyceride, Glycerol tri (caprylic/capric/myristic/stearic acid), hydrogenated rosin triglyceride (hydrogenated ester gum), rosin triglyceride (ester gum), glycerol behenate, glycerol di-2-heptylundecanoate, glycerol isostearate myristate, cholesterol acetate, cholesterol pelargonate, cholesterol stearate, cholesterol isostearate, cholesterol oleate, cholesterol 12-hydroxystearate, cholesterol macadamia oleoate, phytosterol isostearate, cholesterol soft lanolin acid ester, cholesterol hard lanolin acid ester, cholesterol long chain branched fatty acid ester, cholesterol long chain alpha-hydroxy fatty acid ester, octyl dodecyl ricinoleate, octyl dodecyl lanolate, hydrogenated rosin triglyceride (hydrogenated ester gum), glycerol stearate, cholesterol isostearate, cholesterol oleate, cholesterol 12-hydroxy stearate, cholesterol isostearate, cholesterol oleate, cholesterol 12-hydroxy stearate, cholesterol macadamia oleate, vegetable sterol macadamia oleoate, vegetable sterol, vegetable oil, Octyl dodecyl erucate, hardened castor oil isostearate, avocado oil fatty acid ethyl ester, isopropyl lanolate and the like.

As the low-polarity organic compound, for example, a higher alcohol having 10 to 30 carbon atoms can be used. When a higher alcohol is used as the emulsion stabilizing component, the amount of the hydrophilic surfactant can be reduced, and the water resistance can be further improved. The higher alcohol is a saturated or unsaturated monohydric aliphatic alcohol, and the hydrocarbon group thereof may be either linear or branched, and is more preferably linear. Examples of the higher alcohol having 10 to 30 carbon atoms include lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, cetyl alcohol, oleyl alcohol, isostearyl alcohol, hexyldodecanol, octyldodecanol, cetearyl alcohol, 2-decyltetradecanol, cholesterol, sitosterol, phytosterol, lanosterol, lanolin alcohol, and hydrogenated lanolin alcohol. In the present invention, it is preferable to use a higher alcohol having a melting point of 40 to 80 ℃ alone, or to combine a plurality of higher alcohols so that the melting point becomes 40 to 70 ℃.

The amount of the oil agent to be blended in the cosmetic of the present invention is not particularly limited, and is preferably 3 to 60 mass%, more preferably 4 to 50 mass%, even more preferably 5 to 40 mass%, even more preferably 6 to 30 mass%, and even more preferably 7 to 20 mass% based on the total mass of the cosmetic.

(ultraviolet absorber)

The (E) oil agent may contain at least one ultraviolet absorber. That is, the oil phase of the cosmetic of the present invention may contain an ultraviolet absorber. The ultraviolet absorber is preferably an organic type, more preferably oleophilic, and still more preferably oil-soluble. In addition to the inorganic ultraviolet screening component (D) described above, the inclusion of the organic ultraviolet absorbent as the oil agent (E) has a practical advantage of further improving the ultraviolet screening effect on UV-a waves (wavelengths 315 to 380nm) other than UV-B waves (wavelengths 280 to 315nm), in addition to achieving a higher SPF value as the whole cosmetic. The cosmetic of the present invention may contain a water-soluble ultraviolet absorber (H) described later, in addition to the ultraviolet absorber as the oil agent (E), and is preferable.

The oil-soluble ultraviolet absorber is not particularly limited as long as it is an ultraviolet absorber generally used for cosmetics and skin preparations for external use, and examples thereof include the following ultraviolet absorbers. The oil-soluble ultraviolet absorber may be used alone or in combination of two or more.

Cinnamic acid-based ultraviolet absorbers such as benzyl p-methoxycinnamate, 2-ethylhexyl p-methoxycinnamate, and glycerol p-dimethoxycinnamate mono-2-ethylhexanoate;

benzophenone-based ultraviolet absorbers such as hydroxymethoxybenzophenone, dihydroxymethoxybenzophenone, dihydroxybenzophenone, tetrahydroxybenzophenone and the like;

benzoate-based ultraviolet absorbers such as p-aminobenzoic acid, ethyl p-aminobenzoate, glycerol p-aminobenzoate, amyl p-dimethylaminobenzoate, octyl p-dimethylaminobenzoate, ethyl 4- [ N, N-bis (2-hydroxypropyl) amino ] benzoate, and hexyl diethylaminohydroxybenzoylbenzoate;

salicylic acid-based ultraviolet absorbers such as ethylene glycol salicylate, phenyl salicylate, octyl salicylate, benzyl salicylate, p-tert-butylphenyl salicylate, and homomenthyl salicylate;

triazine-based ultraviolet absorbers such as ethylhexyl triazone (2,4, 6-tris [4- (2-ethylhexyl oxycarbonyl) anilino ]1,3, 5-triazine) and bis-ethylhexyl oxyphenol methoxyphenyl triazine;

4-tert-butyl-4' -methoxydibenzoylmethane, Menthyl Anthranilate, 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2-ethylhexyl dimethoxybenzylidenedioxoimidazolidinepropionate, octocrylene, polydimethylsiloxane diethylbenzylidenemalonate, and other ultraviolet absorbers.

Among them, when an ultraviolet absorber such as 2-ethylhexyl p-methoxycinnamate, glycerol mono-2-ethylhexanoate p-dimethoxycinnamate, octyl salicylate, homomenthyl salicylate, bis-ethylhexyloxyphenol methoxyphenyl triazine, dihydroxybenzophenone, octocrylene, 4-tert-butyl-4' -methoxydibenzoylmethane, diethylamino hydroxybenzoyl hexyl benzoate, etc. is selected, a particularly high ultraviolet blocking effect can be obtained.

The amount of the ultraviolet absorber added to the cosmetic of the present invention is not particularly limited, and is preferably 3 to 30% by mass, more preferably 5 to 25% by mass, and still more preferably 7 to 20% by mass, based on the total mass of the cosmetic.

[ Water ]

The cosmetic material of the present invention contains water. Water is a component that forms an aqueous phase in the cosmetic of the present invention, and contains the component (B) to increase the viscosity, and has a structure in which other hydrophobic powders of the component (D) are stably dispersed in the aqueous phase in the presence of the component (a) and the component (C). In addition to the emulsified particles of the oil agent (E), the alcohol (G), the water-soluble ultraviolet absorber (H), and the vinyl copolymer emulsion (I) described later may be uniformly dispersed or mixed.

The amount of water to be added to the cosmetic of the present invention is not particularly limited, and is preferably 20 to 95% by mass, more preferably 40 to 80% by mass, even more preferably 45 to 70% by mass, even more preferably 47 to 65% by mass, and even more preferably 50 to 60% by mass, based on the total mass of the cosmetic.

[ (F) oil-soluble film-Forming agent ]

The cosmetic of the present invention, preferably a water-in-oil type emulsion cosmetic, may also contain at least one (F) oil-soluble film-forming agent. By combining the above-mentioned components (a) to (D), particularly the carboxylic acid-modified silicone as the component (a) and the oil-soluble film-forming agent (F), an oil-in-water type emulsion cosmetic, preferably an oil-in-water type emulsion cosmetic, which has high stability as the whole cosmetic and can provide a cosmetic film having excellent water resistance can be provided.

(F) The kind of the oil-soluble film forming agent is not particularly limited, but a silicone-based film forming agent is preferable, and at least one selected from the group consisting of:

(F1) a silicone resin containing an M unit and a Q unit,

(F2) Silicone acrylate,

(F3) T unit-containing silicone resin and

(F4) and (3) silicone resin glue.

(F1) The silicone resin containing M units and Q units may be any silicone resin that is generally used in cosmetics. As the silicone resin containing M units and Q units, any silicone resin can be used as long as it has triorganosiloxy units (M units) (for example, the organic group is only an alkyl group such as methyl, or an alkyl group such as methyl and an allyl group such as vinyl, or an aryl group such as phenyl) and siloxy units (Q units), and examples thereof include MQ resin, MDQ resin, and MDTQ resin (D represents a diorganosiloxy unit, and for example, the organic group is only an alkyl group such as methyl, or an alkyl group such as methyl and an allyl group such as vinyl, or an aryl group such as phenyl). More specifically, trimethylsiloxysilicate, polyalkylsiloxysilicate, trimethylsiloxysilicate containing dimethylsiloxy units, alkyl (perfluoroalkyl) siloxysilicate, and the like are exemplified. These silicone resins are oil-soluble, and silicone resins soluble in tetracyclosiloxane (D4) and pentacyclosiloxane (D5) are particularly preferred.

Among them, trimethylsiloxysilicate is preferable. Commercially available products include MQ-1600Resin (manufactured by Dow Toray), 749Fluid (manufactured by Dow Toray), 593Fluid (manufactured by Dow Toray), X-21-5595, KF-7312J, KF-7312F (manufactured by shin-Etsu chemical Co., Ltd.) in which trimethylsiloxysilicacid is dissolved in a solvent in advance, and the like. These may be used alone or in combination as appropriate.

Examples of the (F2) silicone acrylate include: copolymers having a polyalkylacrylate skeleton and a polydimethylsiloxane polymer grafted to an alkyl ester side chain, such as a copolymer of cyclopentasiloxane (and) acrylate/polydimethylsiloxane (KP-545, manufactured by shin-Etsu chemical Co., Ltd.), and a copolymer of methyltrimethylsiloxane (and) acrylate/polydimethylsiloxane (KP-549, manufactured by shin-Etsu chemical Co., Ltd.), and other commercially available products include KP-543, 550, 545L, manufactured by shin-Etsu chemical Co., Ltd. Further, there may be mentioned copolymers having a polyalkylacrylate skeleton and a siloxane dendron structure grafted to an alkyl ester side chain, such as FA4001CM, FA4002ID, FA4003DM, FA4004ID, and FA PEPS (manufactured by Dow Toray Co., Ltd.) in which an (acrylate/poly (trimethylsiloxy) methacrylate) copolymer is diluted with a solvent in advance. These may be used alone or in combination as appropriate.

(F3) The silicone resin containing T units may be any silicone resin that is generally used in cosmetics. As the silicone resin containing T units (F3), any silicone resin can be used as long as it has a monoorganosiloxy unit (T unit) (for example, the organic group is an alkyl group such as methyl, or an allyl group such as vinyl, or an aryl group such as phenyl), and examples thereof include MTQ resin, MDTQ resin, TD resin, TQ resin, TDQ resin, and the like. These silicone resins are oil-soluble, and are particularly preferably soluble in D4 or D5.

Specific examples of the silicone Resin containing T units in (F3) include 670Fluid and 680Fluid prepared by dissolving polypropylsilsesquioxane in a solvent, MQ-1640 Fluid Resin as a mixture with trimethylsiloxysilicate, and SW-8005C30 Resin wax (manufactured by Dow Toray Co., Ltd.) as alkyl (C30-45) dimethylsilylpolypropylsilsesquioxane. These may be used alone or in combination as appropriate.

Examples of the silicone resin adhesive (F4) include FC-5002IDD (manufactured by Dow Toray Co., Ltd.) which is a (trimethylsiloxysilicate/dimethiconol) crosslinked polymer, and the like.

The amount of the oil-soluble film-forming agent to be blended in the cosmetic of the present invention is 0.01 to 5% by mass, preferably 0.05 to 3% by mass, and more preferably 0.10 to 2% by mass, based on the total mass of the cosmetic.

[ (G) alcohols ]

The cosmetic compositions of the present invention may contain at least one (G) alcohol. The alcohols include at least one selected from monohydric alcohols such as ethanol and polyhydric alcohols.

When the cosmetic of the present invention contains a hydrophobic powder such as the component (D), the component (a) and the hydrophobic powder are mixed with a polyhydric alcohol in advance, and then mixed with other components to prepare the cosmetic, the hydrophobic powder can be dispersed well in an aqueous phase.

Examples of the monohydric alcohol include lower alcohols such as ethanol and isopropyl alcohol, and particularly ethanol is a common dispersing solvent and is blended in various cosmetic compositions.

Examples of the polyhydric alcohol include sorbitol, xylitol, propylene glycol, dipropylene glycol, 1, 3-butylene glycol, glycerin, diglycerin, and polyethylene glycol, and these polyhydric alcohols may be used alone or in combination of two or more.

When the component (a) and the hydrophobic powder are mixed with an alcohol in advance, the alcohol in a liquid state is preferable in that it can be uniformly dispersed in an aqueous phase, and among them, ethanol, propylene glycol, dipropylene glycol, 1, 3-butanediol, glycerin, diglycerin, and a combination thereof are preferable.

The amount of the alcohol to be blended in the cosmetic of the present invention is not particularly limited, and is preferably 0.3 to 30% by mass, more preferably 0.5 to 25% by mass, even more preferably 1 to 20% by mass, even more preferably 2 to 20% by mass, and even more preferably 3 to 15% by mass, based on the total mass of the cosmetic.

[ (H) Water-soluble ultraviolet absorber ]

The cosmetic of the present invention may contain an ultraviolet absorber in addition to the oil phase and the aqueous phase, and may further improve the SPF value and PA index value of the whole cosmetic amount. Specifically, at least one (H) water-soluble ultraviolet absorber that can be dissolved in the aqueous phase may be contained.

The kind and amount of the water-soluble ultraviolet absorber are not particularly limited as long as they are used in cosmetics and skin external preparations, and examples thereof include phenylbenzimidazole sulfonic acid (PBSA), 2-hydroxy-4-methoxybenzophenone, terephthalylidene dicamphor sulfonic acid (Mexoryl (trademark) SX), oxybenzone-4, benzophenone-5, benzylidene camphor sulfonic acid, cinnamamidopropyl-trimethyl ammonium chloride, methoxycinnamamido-propylethyldimethyl ammonium chloride ether, disodium bisethylphenylaminotriazine diphenylethylene disulfonate, disodium diphenylvinylbisphenyldisulfonate, disodium phenylbisbenzimidazole tetrasulfonic acid, methoxycinnamamidopropyl hydroxybetaine, methoxycinnamamido-propyllauryl diamine tosylate, sodium dihydroisovaleramide, sodium dihydrovaleramide, sodium hydroxyvaleramide, sodium lauryldiamide, sodium hydroxyvalerolactam, sodium dihydrovalerolactam, sodium, and the like, PEG-25PABA (p-aminobenzoic acid), polyquaternium-59, TEA-salicylate, and their salts, derivatives, and mixtures thereof. Preferred examples thereof include phenylbenzimidazole sulfonic acid, terephthalylidene dicamphor sulfonic acid, and salts thereof. These can be used alone or in combination of two or more, but when two or more ultraviolet absorbers are blended as the oil agent, it is also preferable to select only one as a water-soluble ultraviolet absorber or to reduce the amount of the ultraviolet absorber used in the formulation in order to suppress the burden on the skin.

The amount of the water-soluble ultraviolet absorber to be blended in the cosmetic of the present invention is not particularly limited, but is preferably 0.1 to 30% by mass, more preferably 0.2 to 25% by mass, even more preferably 0.3 to 20% by mass, and even more preferably 0.3 to 15% by mass, based on the total mass of the cosmetic.

[ (I) vinyl Polymer emulsion ]

The cosmetic of the present invention may optionally contain a vinyl polymer emulsion such as an acrylic acid/methacrylic acid copolymer. The vinyl polymer is a film-forming component or an aqueous thickener for forming a cosmetic film on the skin or the like, or an SPF booster, and can improve the uv protection (particularly SPF value) derived from an inorganic uv-shielding component which is a hydrophobic powder by using the carboxylic acid-modified silicone (a) in combination. When the vinyl polymer emulsion (I) is used alone, the effect of increasing the SPF value of the cosmetic is limited, and the effect of increasing the SPF value of the cosmetic is sufficiently exhibited by using both of them.

The vinyl polymer is a polymer or copolymer obtained by polymerizing one or more vinyl monomers (monomers) having at least one functional group copolymerizable with a vinyl group, and a part of the monomers in the present invention may contain a carbosiloxane dendrimer structure.

The vinyl polymer emulsion is obtained by adding a radical polymerization initiator to one or more of the above vinyl monomers, preparing an emulsion dispersion in an aqueous medium containing a surfactant, and subjecting the emulsion dispersion to emulsion polymerization (polymerization reaction or copolymerization reaction). In the emulsion, a vinyl polymer is dispersed in an aqueous phase in the form of emulsion particles or latex particles, and the vinyl polymer is obtained as a solid content by removing water by a drying method or the like.

Specific examples of the vinyl monomer include lower alkyl (meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, and isopropyl (meth) acrylate; glycidyl (meth) acrylate; higher (meth) acrylates such as n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, n-hexyl (meth) acrylate, meth (acrylic acid), cyclohexyl ester, 2-ethylhexyl (meth) acrylate, octyl (meth) acrylate, lauryl (meth) acrylate, and stearyl (meth) acrylate; lower fatty acid vinyl esters such as vinyl acetate and vinyl propionate; higher fatty acid esters such as vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, and vinyl stearate; aromatic vinyl monomers such as styrene, vinyltoluene, benzyl (meth) acrylate, phenoxyethyl (meth) acrylate, and vinylpyrrolidone; amide group-containing vinyl monomers such as (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, isobutoxymethoxy (meth) acrylamide, and N, N-dimethyl (meth) acrylamide; hydroxyl group-containing vinyl monomers such as 2-hydroxyethyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, and 2-hydroxypropyl (meth) acrylate: fluorine-containing vinyl monomers such as trifluoropropyl (meth) acrylate, perfluorobutylethyl (meth) acrylate, and perfluorooctylethyl (meth) acrylate; epoxy group-containing vinyl monomers such as (meth) acrylic glycidic acid esters and 3, 4-epoxycyclohexylmethyl (meth) acrylates; carboxylic acid-containing vinyl monomers such as (meth) acrylic acid, itaconic acid, crotonic acid, fumaric acid, and maleic acid; ether bond-containing vinyl-type monomers such as tetrahydrofurfuryl (meth) acrylate, butoxyethyl (meth) acrylate, ethoxydiglycol (meth) acrylate, polyethylene glycol (meth) acrylate, polypropylene glycol mono (meth) acrylate, hydroxybutyl vinyl ether, cetyl vinyl ether, and 2-ethylhexyl vinyl ether; unsaturated group-containing silicone compounds such as (meth) acryloyloxypropyltrimethoxysilane, a (branched or linear) polydimethylsiloxane having a (meth) acryloyl group at one end, and a polydimethylsiloxane having a styryl group at one end; butadiene; vinyl chloride; vinylidene chloride; (meth) acrylonitrile; dibutyl fumarate; maleic anhydride; dodecyl succinic anhydride; glycidyl (meth) acrylate: alkali metal salts, ammonium salts, and organic amine salts of radical polymerizable unsaturated carboxylic acids such as (meth) acrylic acid, itaconic acid, crotonic acid, fumaric acid, and maleic acid; radical polymerizable unsaturated monomers having a sulfonic acid group such as styrenesulfonic acid, and alkali metal salts, ammonium salts, and organic amine salts thereof; quaternary ammonium salts derived from (meth) acrylic acid such as 2-hydroxy-3-methacryloxypropyltrimethylammonium chloride, methacrylic acid esters of alcohols having a tertiary amino group such as diethylamine methacrylate, and quaternary ammonium salts thereof.

Furthermore, a polyfunctional vinyl monomer may be used, and examples thereof include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, ethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, 1, 4-butanediol di (meth) acrylate, 1, 6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane trioxethyl (meth) acrylate, tris (2-hydroxyethyl) isocyanurate di (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, a diol di (meth) acrylate which is an adduct of ethylene oxide or propylene oxide of bisphenol A, a diol di (meth) acrylate which is an adduct of ethylene oxide or propylene oxide of hydrogenated bisphenol A, and the like, And (meth) acryloyl group-containing monomers such as triethylene glycol divinyl ether, and unsaturated group-containing silicone compounds such as both-terminal styryl-terminated polydimethylsiloxanes and both-terminal methacryloxypropyl-terminated polydimethylsiloxanes.

In addition to these, a silicone compound having a vinyl radical polymerizable unsaturated group and a hydrolyzable group may be used. In this case, the film strength is hard, and furthermore, the hydrophobic property is improved, so that it is preferable. Examples of the radical polymerizable group include a (meth) acryloyloxy group-containing organic group, a (meth) acrylamide group-containing organic group, a styryl group-containing organic group, an alkenyl group having 2 to 10 carbon atoms, a vinyloxy group, and an allyloxy group.

The vinyl monomer may contain a carbosiloxane dendrimer structure, and examples thereof include a vinyl monomer having a carbosiloxane dendrimer structure and an acrylate monomer or a methacrylate monomer. Specific examples thereof are shown in patent document 4 (international patent publication No. 2017/061090) and the like. The polymerization of the carbosiloxane dendrimer can be produced, for example, by the production methods described in Japanese patent application laid-open Nos. 11-1530, 2000-63225, 2001-192424, 2014-40512, and the like.

The radical polymerization initiator used for the synthesis of the vinyl polymer is not particularly limited as long as it is a radical polymerization initiator generally used for emulsion polymerization of vinyl polymers. Examples of the inorganic peroxides include inorganic peroxides such as potassium persulfate, sodium persulfate, and ammonium persulfate; water-soluble peroxides such as organic peroxides including t-butyl peroxymaleic acid, succinic peroxide, and t-butyl hydroperoxide. When an oil-soluble radical initiator is used, it may be emulsified in advance and then mixed with other components.

The emulsion dispersion is prepared using a conventional emulsifying apparatus. The polymerization temperature and the reaction time are appropriately determined depending on the desired polymerization degree of the vinyl polymer, the kind of the monomer, the final solid content concentration, and the like. The polymerization may be carried out while dropping the emulsified dispersion, or the emulsified dispersion may be charged and polymerized together, and the production process is not particularly limited.

The vinyl polymer emulsion in the present invention may be in the form of an emulsion in which uniform vinyl polymer or vinyl copolymer emulsion particles are dispersed in an aqueous phase, or in the form of an emulsion in which vinyl copolymer latex particles having a core-shell structure are dispersed in an aqueous phase.

The vinyl polymer emulsion (I) in the present invention is preferably an emulsion of an acrylic copolymer polymer obtained by copolymerizing an acrylic acid ester monomer or a methacrylic acid ester monomer, and in the acrylic copolymer polymer, a part of the hydrocarbon groups may be substituted with fluorine or chlorine atoms, and a functional group selected from an alkyl group having 6 or more carbon atoms, a styryl group, and a carbosiloxane dendron structure may be included. Further, an acrylic copolymer polymer containing a hydrophilic group such as a hydroxyl group in the molecule may be used.

The vinyl polymer emulsion (I) in the present invention is preferably an emulsion of one or more acrylic copolymer polymers selected from the following:

(i1) acrylic acid/alkyl methacrylate copolymer polymers,

(i2) Acrylic acid/methacrylic acid styrene copolymer polymer and

(i3) acrylic/methacrylic copolymer polymers having carbosiloxane dendron structures.

Such a component (I) can be synthesized by the above-mentioned method, and a commercially available component (I) can be mentioned, for example, DOWSIL sold by Dow chemical/Dow Toray company^TM FA4103 ACRYLATE EMULSION；SOLTEX^TM INO POLYMER；EPITEX^TM 66POLYMER；EPITEX^TM99 POLYMER; SunSpheres, LUVIFLEX (R) SOFT, marketed by BASF corporation, and the like. Similarly, YODOSOL GH41 (manufactured by NSC, Japan), Syntran5002 (manufactured by Interpolymer) and SunSpheres can be used as acrylic/methacrylic styrene copolymer emulsion^TMCommercially available products such as PGL SPF Booster (manufactured by Takara Chemicals).

In the cosmetic of the present invention, the amount of the vinyl polymer emulsion (I) is not particularly limited, but is preferably in the range of 0.1 to 10 mass%, more preferably 0.2 to 7.5 mass%, and even more preferably 0.5 to 5.0 mass%, based on the total mass of the cosmetic, as a solid component of the vinyl polymer (hereinafter referred to as "solid component in emulsion") for removing water from the emulsion for the purpose of improving the long-wearing property and SPF value of the cosmetic.

In the cosmetic of the present invention, in order to improve the durability and SPF value of the cosmetic by using the component (I) in combination, it is preferable to contain the vinyl polymer emulsion (I) in an amount in which the content of the solid content in the emulsion is in the range of 0.5 to 10 parts by mass, and it is particularly preferable to contain the vinyl polymer emulsion (I) in an amount in the range of 1.0 to 7.5 parts by mass, based on 100 parts by mass of the inorganic ultraviolet screening agent (D) composed of a hydrophobic particulate metal oxide. In the above range, the combination of the components (a) and (B) as the water-soluble thickener and the vinyl polymer emulsion (I) can stably disperse the component (D) in the aqueous phase, and thus the SPF value of the entire cosmetic can be improved.

[ optional Components ]

The cosmetic of the present invention may contain other components generally used in cosmetics, for example, hydrophilic powder, moisturizers other than component (G), gelling agents, preservatives, antibacterial agents, perfumes, salts, antioxidants, pH adjusters other than component (C), chelating agents, cooling and refreshing agents, anti-inflammatory agents, physiologically active components (whitening agents, cell activators, agents for improving rough skin, blood circulation promoters, skin firming agents, anti-seborrheic agents, and the like), vitamins, amino acids, nucleic acids, hormones, and inclusion compounds, within ranges that do not impair the effects of the present invention. The other components are not particularly limited.

In the cosmetic of the present invention, at least one salt of a higher fatty acid may also be contained; specifically, the salts of saturated and unsaturated fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid, oleic acid, linoleic acid, linolenic acid, eicosatetraenoic acid, eicosapentaenoic acid (EPA), hexyldecanoic acid, docosahexaenoic acid (DHA), isostearic acid, and 12-hydroxystearic acid. Such a higher fatty acid salt is also a component that functions as an emulsifier.

[ production method ]

The process for producing the cosmetic of the present invention is arbitrary, and is not particularly limited as long as the components can be mixed to prepare a cosmetic containing a liquid (a) carboxylic acid-modified silicone, (B) a water-soluble thickener, (C) a basic compound, (D) an inorganic ultraviolet screening agent composed of a hydrophobic particulate metal oxide, and water.

For example, the cosmetic of the present invention can be produced by mixing (D) an inorganic ultraviolet screening agent comprising a hydrophobic fine-particle metal oxide, (a) a carboxylic acid-modified silicone and optionally (E) an oil agent, and (G) an alcohol (a precursor slurry composition or the like) in advance, emulsifying the mixture obtained in the preliminary mixing step in water by a mechanical force, and further mixing (B) a water-soluble thickener, (C) a basic compound, and residual water. In particular, the use of (C) a basic compound preferably has a structure of an aqueous dispersion in which a hydrophobic powder having a pH of 6.5 to 14.0 is dispersed in an aqueous phase. Of the above-mentioned optional components, the oily raw material is preferably added in a preliminary mixing step including the (E) oil agent, and the optional aqueous raw material (for example, (H) water-soluble ultraviolet absorber) is preferably mixed in water in advance.

[ method of use ]

The cosmetic of the present invention may be in any form of cream, gel, emulsion, or liquid, and the cosmetic of the present invention may be used as a base cosmetic such as emulsion, cream, or lotion, a makeup base cosmetic, a sunscreen cream, a foundation, an eye shadow, an eyeliner, a water powder, or a color cosmetic, or may be used as a sunscreen cream for hair/scalp, a temporary hair dye, or the like. The embodiment of the sunscreen cosmetic to be described later is not particularly limited, but may be used in the form of emulsion (deposition), liquid (liquid), gel, mist (mist spray), liquid, solid, oil, foam, or the like.

The cosmetic of the present invention can also be further used as a precursor (premix or cosmetic raw material) for a cosmetic.

The cosmetic of the present invention is in the form of an aqueous composition or an oil-in-water emulsion composition, and water constituting the continuous phase is in direct contact with the skin, so that a more moist and refreshing feeling in use can be imparted.

The cosmetic of the present invention is preferably a skin cosmetic, more preferably applied to weakly acidic skin, and even more preferably applied to skin having a pH of 5.1 to 7.0, for example.

In addition, the cosmetic of the present invention is added at a concentration of 0.5mg/cm²When the amount of (3) is applied to the skin, the pH of the coated surface after 30 minutes is preferably 7.0 or less, and more preferably 6.7 or less.

The cosmetic composition of the present invention is stable and can form a cosmetic film having excellent water resistance on the skin, and therefore, the cosmetic composition is less likely to be removed by sweat, rain, or the like and has excellent long-lasting makeup.

[ sunscreen cosmetic ]

The cosmetic of the present invention, preferably an oil-in-water emulsion cosmetic, can stably disperse a large amount of the component (D) in an aqueous phase while taking advantage of the above-mentioned touch feeling, and therefore can be designed to have a high SPF value as an index indicating the degree of the effect of isolating UV-B waves (wavelength of 280 to 315nm), and is particularly suitable for a sunscreen cosmetic.

SPF value (per 1 cm) of the cosmetic composition of the invention²Measured value of each 2mg preparation applied to the skin) is preferably 5 or more, more preferably 25 or more, and can be easily designed to have a high SPF value of 30 to 100. In particular, since the component (D) can be blended in a relatively large amount and stably in the cosmetic of the present invention, a cosmetic having an SPF value of 50 to 80 can be provided in some cases without impairing the touch as a cosmetic.

The oil-in-water emulsion cosmetic of the present invention can be designed to be a sunscreen cosmetic excellent in PA index (abbreviation of UVA Protection class) which is an index indicating the degree of effect of shielding UV-A waves (wavelength of 315 to 380nm) by selecting the component (D) and the component (H) and selecting another organic ultraviolet absorber. Specifically, by using diethylamino hydroxybenzoyl hexyl benzoate (registered trademark Uvinul a, BASF Japan) or the like as an ultraviolet absorber active in the UV-a region in combination, it is possible to design a sunscreen cosmetic material having a PA index of + or more (effective), preferably PA + + or more.

As described above, since the cosmetic of the present invention is less likely to cause a decrease in the viscosity of the preparation and is excellent in the stability and water resistance of the cosmetic film even when the hydrophobic fine-particle metal oxide derived from the component (D) or the water-soluble component derived therefrom is contained in the aqueous phase, when the cosmetic is used as a sunscreen cosmetic, in addition to a high ultraviolet protection effect, the cosmetic is less likely to be removed by sweat, rain, or the like and is excellent in the makeup retention. Further, the component (a) has both advantages that it is excellent in water resistance and long-lasting property because it can be easily washed with an alkaline soap or the like, and that it is less likely to cause skin irritation and allergic reaction in long-term use because it is easily washed off with a sunscreen cosmetic.

Examples

The present invention will be described in further detail below with reference to examples, but the present invention is not limited to these examples. The amount of each component added represents "mass%" ("weight%") unless otherwise specified.

The carboxylic acid-modified silicone (compound 1) as the component (a) of the present invention was synthesized by the following method.

[ Synthesis example 1]

230.67g of trimethylsilyl undecylenate and 0.042g of platinum-1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane complex were charged into a flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer, and 129.33g of Si-H siloxane represented by the following general formula was added dropwise so as to maintain the temperature in the range of 70 to 80 ℃.

After completion of the dropwise addition, the mixture was aged at 110 ℃ for 2 hours, and then the disappearance of Si-H bonds was confirmed by the hydrogen generation method. The low-boiling components were distilled off under reduced pressure. Thereafter, 90g of deionized water was added, and the mixture was aged under reflux for 4 hours to conduct deprotection. Thereafter, the low boiling point components were removed again under reduced pressure to obtain compound 1. As a result of the analysis, it was confirmed that the compound was a compound 1 represented by the following chemical formula.

[ Synthesis example 2]

100g of 1,1,1,3,5,5, 5-heptamethyltrisiloxane and 0.02g of a toluene solution of platinum-1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane complex were put into a flask equipped with a stirrer, a reflux condenser, a dropping funnel and a thermometer, and 105g of trimethylsilyl undecylenate was added dropwise so as to maintain the temperature in the range of 70 to 100 ℃. After completion of the dropwise addition, the mixture was aged at 110 ℃ for 2 hours, and then the disappearance of Si-H bonds was confirmed by the hydrogen generation method. The low-boiling components were distilled off under reduced pressure. Thereafter, water was added and the mixture was aged under reflux for 4 hours to conduct deprotection. Thereafter, the low boiling point components were removed again under reduced pressure to obtain compound 2. As a result of the analysis, it was confirmed that the chemical structure of compound 2 is represented by the following chemical formula.

[ chemical formula 3]

Preparation and evaluation of aqueous dispersion: examples 1 to 8 and comparative examples 1 to 10

Each of the components of phase a shown in tables 1 to 4 below was added to a mayonnaise bottle, and zirconia beads (YTZ balls,)160 g. The beads were separated by dispersing with a paint shaker (paint shaker) (mixture (1)).

Each constituent component of phase B was added to another beaker, and the mixture (1) was added while stirring with a Three-one motor, to obtain aqueous dispersions of examples 1 to 8 and comparative examples 1 to 10.

Each aqueous dispersion was evaluated by the following method, and the results are shown in the table. The pH of each aqueous dispersion was measured at room temperature using a pH paper.

[ appearance evaluation of aqueous Dispersion ]

The appearance of the aqueous dispersion was observed just after preparation and after 3 months of storage at room temperature.

O: is a gel-paste dispersion with good dispersion state

Δ: is a good dispersion state but low viscosity emulsion

X: viscosity reduction and settling and separation of fine powder

[ hydrophobicity test ]

Each of the aqueous dispersions of tables 1 to 4 was applied to artificial skin (bioskin) manufactured by Beaulax corporation, thinly stretched, and dried at 40 ℃ for 1 hour. To the surface of the dried coating film, 2. mu.l of water was slowly dropped, and the state of water droplets formed on the surface was observed.

O: the water drop maintains the shape of hemisphere

X: spreading of water drops

[ Water resistance test ]

Each of the aqueous dispersions shown in tables 1 to 4 was applied to artificial skin manufactured by Beaulax corporation, thinly stretched, and dried at 40 ℃ for 1 hour. The strength of the coating film was confirmed 10 seconds after running tap water from the surface of the dried coating film.

O: no change of coating film

X: collapse of coating film

[ sebum resistance test ]

Each of the aqueous dispersions shown in tables 1 to 4 was applied to artificial skin manufactured by Beaulax corporation, thinly stretched, and dried at 40 ℃ for 1 hour. A drop of artificial sebum (a weight ratio of triolein: oleic acid: squalane: 3: 1: 1) was slowly dropped onto the surface of the dried coating film by a dropping pipette. The strength of the coating film was confirmed by rotating the glove with fingers wearing nitrile rubber gloves for 10 revolutions while pressing the droplets.

O: no change of coating film

X: coating film dissolution collapse

[ Table 1]

(Note 1) PEG-12 polydimethylsiloxane

(Note 2) trade name: isostearic acid EX (manufactured by higher alcohols industries Co., Ltd.)

(Note 3) trade name: FINEX-30S-LPT (made by Sakai chemical industry Co., Ltd.)

(Note 4) trade name: carbopol 980 (manufactured by Lubrizol corporation)

[ Table 2]

(Note 1-4) refer to Table 1

(Note 5) trade name: carbopol Ultrez 21 Polymer (manufactured by Lubrizol Co., Ltd.)

[ Table 3]

(Note 1-4) refer to Table 1, (note 5) refer to Table 2

(Note 6) trade name: FINEX-30S-OTS (made by Sakai chemical industry Co., Ltd.)

[ Table 4]

(Note 1-4) refer to Table 1, (note 5) refer to Table 2, and (note 6) refer to Table 3

(Note 7) ACULYN^TMEXCEL RHEOLOGY MODIFIER (manufactured by the Dow chemical Co., Ltd.)

(Note 8) ACULYN^TM22 RHEOLOGY MODIFIER (manufactured by the Dow chemical Co., Ltd.)

(Note 9) ACULYN^TM28 POLYMER (manufactured by the Dow chemical Co., Ltd.)

(Note 10) ACULYN^TM33A RHEOLOGY MODIFIER (manufactured by the Dow chemical Co., Ltd.)

[ summaries of tables 1 to 4]

It was confirmed that all of the aqueous dispersions containing hydrophobic zinc oxide fine particles of examples 1 to 4 maintained a good dispersion state for 3 months at room temperature, and formed a cosmetic film having excellent hydrophobicity, water resistance, and sebum resistance. On the other hand, in the case of comparative experiments in which the component (a) in these examples was replaced with another carboxylic acid-modified silicone, a polyether-modified silicone which is a known surfactant, and isostearic acid, the results were poor in any of the stable dispersion state, the water resistance of the film, and the like. In examples 5 to 8 in which an acrylic copolymer aqueous dispersion was used as the component (B), an aqueous dispersion having a good dispersion state was also obtained.

[ oil-in-water type sunscreen cosmetic: examples 9 to 14

Sunscreen cosmetics containing a phase inversion type emulsified thickener were prepared according to the formulations shown in tables 5 and 6 below, and the dispersion stability (appearance) and the performance of a cosmetic film were evaluated according to the following criteria. Table 5 and table 6 show the names of the respective components, the names of the products used in the recipe, and the supply sources.

[ hydrophobicity test ]

Each of the aqueous dispersions shown in tables 1 to 4 was applied to artificial skin manufactured by Beaulax corporation, thinly stretched, and dried at 40 ℃ for 1 hour. To the surface of the dried coating film, 20. mu.l of water was slowly dropped, and the state of water droplets formed on the surface was observed.

O: the water drop maintains the shape of hemisphere

X: spreading of water drops

[ Water resistance test ]

Each of the aqueous dispersions shown in tables 1 to 4 was applied to artificial skin manufactured by Beaulax corporation, thinly stretched, and dried at 40 ℃ for 1 hour. The strength of the coating film was confirmed 10 seconds after running tap water from the surface of the dried coating film.

O: no change of coating film

X: collapse of coating film

[ sebum resistance test ]

Each of the aqueous dispersions of tables 1 to 4 was applied to artificial skin, thinly stretched, and dried at 40 ℃ for 1 hour. A drop of artificial sebum (a weight ratio of triolein: oleic acid: squalane: 3: 1: 1) was slowly dropped onto the surface of the dried coating film by a dropping pipette. The strength of the coating film was confirmed by rotating the glove with fingers wearing nitrile rubber gloves for 10 revolutions while pressing the droplets.

O: no change of coating film

X: coating film dissolution collapse

[ Table 5]

(production method)

1. Mixing the A phase.

2. Mixing the phase B.

3. Mixing the phases C.

4. Slowly add phase B while stirring phase a. (AB phase)

5. Add phase C to phase AB above and stir until homogeneous.

[ Table 6]

(production method)

1. Mixing the A phase.

2. Mixing the phase B.

3. Mixing the phases C.

4. Slowly add phase B while stirring phase a. (AB phase)

5. Add phase C to phase AB above and stir until homogeneous.

As shown in examples 9 to 14, even when SEPIGEL or RM2051, which is a phase inversion type emulsification thickener, was used, an oil-in-water sunscreen cosmetic material in which hydrophobic zinc oxide fine particles were stably dispersed in an aqueous phase could be obtained, and the sunscreen cosmetic material provided a cosmetic film excellent in water resistance and the like.

[ oil-in-water type sunscreen cosmetic: examples 15 to 28

The dispersion stability (appearance) of a sunscreen cosmetic composition containing carbomer as a water-soluble thickener was adjusted and evaluated according to the formulations shown in tables 7 to 10 below. As shown in the tables, even when carbomer was used, an oil-in-water sunscreen cosmetic in which hydrophobic zinc oxide fine particles or hydrophobic titanium oxide fine particles were stably dispersed in an aqueous phase could be obtained.

[ Table 7]

(production method)

1. Mixing the A phase.

2. Mixing the phase B.

3. Mixing the phases C.

4. Slowly add phase a while stirring phase B. (AB phase)

5. Add phase C to phase AB and mix until homogeneous.

[ Table 8]

(production method)

1. Mix phase A and heat to 70 ℃.

2. Mix phase B and heat to 70 ℃.

3. Mixing the phases C.

4. Slowly add phase a while stirring phase B. (AB phase)

5. The AB phase was cooled to 35 ℃ or lower while stirring.

6. Add phase C to the above AB phase and mix until homogeneous.

[ Table 9]

(production method)

1. Mix phase A and heat to 75 ℃.

2. Mix phase B and heat to 75 ℃.

3. Mixing the phases C.

4. Slowly add phase a while stirring phase B. (AB phase)

5. The AB phase was cooled to 35 ℃ or lower while stirring.

6. Add phase C to the above AB phase and mix until homogeneous.

[ Table 10]

(production method)

1. Mix phase A and heat to 75 ℃.

2. Mix phase B and heat to 75 ℃.

3. Mixing the phases C.

4. Slowly add phase a while stirring phase B.

5. The AB phase was cooled to 35 ℃ or lower while stirring.

6. Add phase C to the above AB phase and mix until homogeneous.

[ summarisation ]

As shown in examples 1 to 28, the compound 1 was obtained by using a carboxylic acid-modified silicone in combination with carbomer (carboxyvinyl polymer), acrylate copolymer, SEPIGEL or ACULYN^TMRM2051 and the like can provide a cosmetic (particularly an oil-in-water sunscreen cosmetic) containing hydrophobic zinc oxide fine particles or hydrophobic titanium oxide fine particles which have been difficult to form stable aqueous dispersions, and these components suitable for stably dispersing these ultraviolet-screening components in an aqueous phase. As shown in comparative examples, carboxylic acid-modified silicones other than the carboxylic acid-modified silicone having a specific structure as the compound 1 cannot be usedObtaining the cosmetic material. According to the present invention, it is expected that a cosmetic material containing hydrophobic zinc oxide fine particles or hydrophobic titanium oxide fine particles, which has been difficult to form a stable aqueous dispersion, can be designed to have: further expand the freedom of formulation design, and have excellent ultraviolet protection performance, appearance, storage stability and use feeling.