JP3264392B2 - Composite resin powder and cosmetic containing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite resin powder having a good feeling in use and having an excellent effect of preventing ultraviolet rays, and a cosmetic containing the same.

[0002]

2. Description of the Related Art Conventionally, by modifying the surface of powder, the coloring property, wettability,
Powder materials having new properties such as fluidity, dispersibility, and feel have been developed. Particularly, inorganic powders such as zinc oxide, titanium oxide, and iron oxide having an ultraviolet scattering effect, polyethylene resin, polypropylene resin, polystyrene resin,
A composite powder obtained by adhering and fixing a resin surface such as a polyester resin, a polyamide resin, an acrylic resin, a fluororesin, a silicone resin, and the like by a ball mill, an ong mill, a screen mill, a hybridizer, or the like is blended in a sunscreen cosmetic.

However, in general, it is difficult to apply an inorganic powder such as zinc oxide to the surface of a resin powder. Therefore, when the treatment time is lengthened, the adhesion of the inorganic powder such as zinc oxide to the resin powder is improved. Due to the low heat resistance and low mechanical strength of the resin powder, excessive heat and mechanical load caused by the treatment may cause the resin to decompose into monomers or deform the resin powder particles. is there. The generated monomer causes an unpleasant odor, and the deformed resin powder particles have a problem that the dispersibility and the feel are deteriorated.

[0004]

Accordingly, there has been a demand for a composite resin powder in which an inorganic powder is firmly adhered to the surface of the resin powder, and which has excellent usability and an effect of preventing ultraviolet rays.

[0005]

Under such circumstances, the present inventors have conducted intensive studies. As a result, if a resin powder which has been surface-treated in advance is coated with zinc oxide or the like, the resin powder can be firmly applied to the surface of the resin powder. The present inventors have found that a composite resin powder which is adhered and has excellent usability and an effect of preventing ultraviolet rays can be obtained, thereby completing the present invention.

That is, according to the present invention, the surface of the resin powder is
Treated with a surfactant having a perfluoroalkyl group,
Further, the present invention provides a composite resin powder characterized by being coated with zinc oxide, titanium oxide or iron oxide.

As the resin powder used in the present invention, for example, nylon resin, polyethylene resin, polyester resin,
Resin powders such as silicone resin, polystyrene resin, and epoxy resin can be used. These resin powders are spherical and preferably have an average particle diameter of 0.1 to 50 μm, particularly preferably 0.2 to 20 μm. The particle shape of the resin powder is not limited to a spherical shape, but may be a rod shape, a plate shape, an irregular shape, or the like.

[0008] Specific examples of these resin powders include nylon resins such as nylon fine particles SP-500.
(Manufactured by Toray Industries, Inc.); as a polyethylene resin, for example, Flow Bead CL2080LL (manufactured by Sumitomo Seika Co., Ltd.); as a polystyrene resin, for example, Fine Pearl 3000SP
(Manufactured by Nippon Koken Co., Ltd.); As the silicone resin, for example, Tospearl 103, 105, 108, 120, 130, 1
Polymethylsilsesquioxane powders such as 45A, 240, 3120 (all manufactured by Toshiba Silicone Co., Ltd.), Trefil E-500, E-501, E-600, E-601;
E-602, E-603, E-900, E-925, E
And methylpolysiloxane powder such as -930 (manufactured by Dow Corning Toray).

Examples of the surface treatment of the resin powder include silicone treatment, amino acid treatment, metal soap treatment, lecithin treatment, dialkyl phosphoric acid treatment, silica alumina treatment, wax treatment, fluorine treatment and the like. Of these, a fluorine treatment is used as the surface treatment of the present invention, and particularly, a treatment with a surfactant having a perfluoroalkyl group. Any surfactant having a polar group may be used as the surfactant having a perfluoroalkyl group. For example, a polyfluoroalkyl phosphoric acid (US Pat. No. 36327)
No. 44), perfluoroalkyl phosphate diethanolamine salt (JP-A-62-250074), perfluoroalkylsilane, perfluoroalcohol, perfluoroepoxy compound, sulfoamide-type fluorophosphoric acid, perfluorosulfate, And perfluorocarboxylic acid salts.

The zinc oxide, titanium oxide or iron oxide (hereinafter referred to as "zinc oxide etc." when collectively referring to the three types) used in the present invention has been conventionally used in cosmetics, quasi-drugs, external medicines and the like. There are no particular restrictions on the particle diameter, shape, etc. of known inorganic powders. Among the zinc oxides and the like, among them, fine particle zinc oxide (Japanese Patent Publication No. 62-228006), flaky zinc oxide (Japanese Patent Publication No. 1-175921), and fine particle titanium oxide (Japanese Patent Publication No. 1-135111) include ultraviolet rays. As a commercially available product, fine zinc oxide (for example, fine zinc white) (manufactured by Sakai Chemical Industry Co., Ltd.) is used as a commercial product; be able to. Further, as these zinc oxides and the like, those subjected to surface treatment such as silicone treatment, amino acid treatment, metal soap treatment, lecithin treatment, dialkyl phosphoric acid treatment, silica alumina treatment, wax treatment, fluorine treatment and the like can also be used. Further, two or more of these zinc oxides and the like can be used in appropriate combination.

The composite resin powder of the present invention can be obtained by subjecting the surface of the resin powder to the above-mentioned surface treatment, and then coating the surface of the resin powder, which will become the mother particles after the treatment, with zinc oxide or the like.

The method of treating the surface of the resin powder is not particularly limited, and examples thereof include a Henschel mixer, a super mixer, a vibrating ball mill, a rotary ball mill,
The treatment can be carried out using an ong mill, a pot mill, a mortar, an attritor, a hybridizer, or the like. In addition,
When the surface treatment is performed using a surfactant having a perfluoroalkyl group, the surfactant may be used as it is or in a suitable solvent (eg, ethanol, water, isopropyl alcohol, chloroform, Freon R113, hexafluorometaxylene, etc.). It is preferable to dissolve, add by spraying or dropping, uniformly disperse, and then dry at room temperature or by heating. In addition, among the above surfactants, surfactants having a perfluoroalkyl group having 8 or more carbon atoms have extremely low fluidity. Therefore, when they are used, fluorine-based materials such as Freon R113 and hexafluorometa-xylene are used. It is preferable to use it after dissolving it in a solvent.

The amount of the surface treating agent used in this surface treatment is 0.01 to 30% by weight based on the weight of the resin powder.
In particular, it is preferably from 0.5 to 15% by weight. The average particle size of the resin powder surface-treated in this manner is
It is preferably from 0.1 to 50 μm, particularly preferably from 0.2 to 20 μm.

Next, as a method of coating the surface-treated resin powder with zinc oxide or the like, a method similar to the above-mentioned surface treatment can be applied.

The amount of zinc oxide or the like used in this treatment is preferably 2 to 500% by weight, particularly preferably 10 to 100% by weight, based on the weight of the surface-treated resin powder. The composite resin powder of the present invention thus obtained has an average particle size of preferably 0.1 to 50 μm, particularly preferably 0.2 to 20 μm.

The cosmetic of the present invention can be produced by blending the composite resin powder obtained as described above.

The content of the composite resin powder in the cosmetic of the present invention can be appropriately determined according to the type of the cosmetic. It is preferably from 0.1 to 50% by weight, especially from 1 to 25% by weight.

The cosmetics of the present invention may contain, in addition to the above-mentioned composite resin powder, components used in ordinary cosmetics, quasi-drugs, external medicines, etc. within a range that does not impair the effects of the present invention. They can be appropriately blended. Examples of such components include extender pigments such as mica, talc, sericite, and kaolin; inorganic pigments such as pearl;
Organic pigments such as yellow No. 4 aluminum lake; inorganic powders such as zinc oxide, titanium oxide, zirconium oxide, and iron oxide; various organic or inorganic powders subjected to silicone treatment, metal soap treatment, N-acylglutamic acid treatment, fluorine treatment, etc. Hydrocarbons such as solid or liquid paraffin, crystal oil, ceresin, ozokerite, montan wax; vegetable oils such as olive, diwax, carnauba wax, lanolin, gay wax, animal fats or waxes; stearic acid, palmitic acid, oleic acid; Fatty acids and esters thereof such as glycerin monostearate, glycerin distearate, glycerin monooleate, isopropyl myristate, isopropyl stearate, and butyl stearate; dex; Phosphoric acid fatty acid esters; silicone oils such as methylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, and decamethylcyclopentanesiloxane; ethyl alcohol, isopropyl alcohol, cetyl alcohol, stearyl alcohol, palmityl alcohol, hexyl decyl alcohol, etc. Alcohols; polyhydric alcohols such as glycol, glycerin or sorbitol as humectants; surfactants; thickeners; preservatives; antioxidants and the like.

Further, the cosmetics of the present invention can be blended with known UV absorbers. Examples of such ultraviolet absorbers include p-methylbenzylidene,
D, L-camphor or its sulfonic acid sodium salt,
2-phenylbenzimidazole-5-sulfonic acid sodium salt, 3,4-dimethylphenylgluoxylic acid sodium salt, 4-phenylbenzophenone, 4-phenylbenzophenone-2′-carboxylic acid isooctyl ester, p-methoxycinnamic acid ester , 2-phenyl-5
-Methylbenzoxazole, p-dimethylaminobenzoic acid ester, 4-t-butyl-4'-methoxydibenzoylmethane, benzoylpinacolone derivative, benzoyl ketone derivative and the like.

The cosmetic of the present invention can be produced according to a usual method, and can be made into a desired dosage form such as an emulsion, cream, oil, or oily solid.

[0021]

Hereinafter, the present invention will be described with reference to examples.
The present invention is not limited to these examples.

Example 1 A round-bottomed flask (or kneader) having an average particle size of 4.5 μm
m of silicone resin powder (Tospearl 145A, manufactured by Toshiba Silicone Co., Ltd.). Next, (C ₈ F ₁₇ CH ₂
1 g of CH ₂ ) P (O) OH dissolved in 200 g of isopropyl alcohol at 50 ° C. is added,
Mix at 60 ° C. for 4 hours. Thereafter, isopropyl alcohol was distilled off under reduced pressure at 40 to 50 ° C. and dried to obtain mother particles. After thoroughly mixing 20 g of the base particles and 10 g of silicone resin-coated fine particle zinc oxide (fine zinc white, manufactured by Sakai Chemical Co., Ltd.) having a particle size of 0.27 μm, the mixture was charged into a hybridizer, and treated at a peripheral speed of 50 m / s for 3 minutes. A composite resin powder of the present invention was obtained. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with fine zinc oxide.

Comparative Example 1 A silicone resin without surface treatment (Tospearl 145)
A composite resin powder was produced in the same manner as in Example 1 except that A) was used.

The composite resin powders obtained in Example 1 and Comparative Example 1 were observed with an electron microscope, and the adhered state was shown by the following criteria. (Evaluation criteria): Child particles are densely adhered on the mother particles ○: Child particles are densely adhered on the mother particles, but the surface of the mother particles is slightly observed and unadhered child particles are Exists. Δ: Unattached child particles are present. ×: Not adhered.

[0025]

[Table 1]

Example 2 Base particles were obtained in the same manner as in Example 1. Next, 20 g of the base particles and silicone resin-coated fine particle titanium oxide particles having a particle diameter of 30 to 70 nm (MT 600 ks, manufactured by Teikoku Chemical Industries) 10
g, mix well, then put in a hybridizer,
The mixture was treated at a peripheral speed of 50 m / s for 3 minutes to obtain a composite resin powder of the present invention. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with the titanium oxide particles.

Example 3 Nylon resin powder having an average particle diameter of 5 μm (SP-50)
0, manufactured by Toray Industries Inc.), and mother particles were obtained in the same manner as in Example 1. Next, 20 g of the base particles and a particle diameter of 0.27
After sufficiently mixing 10 g of microparticles of silicone resin-coated fine particles of zinc oxide (fine zinc oxide), the mixture was charged into a hybridizer and treated at a peripheral speed of 50 m / s for 3 minutes to obtain a composite resin powder of the present invention. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the nylon resin powder was completely covered with fine zinc oxide particles.

Example 4 A round bottom flask was charged with 200 ml of a water-acetone mixed solvent and 20 g of a silicone resin powder (Tospearl 145A) having an average particle diameter of 4.5 μm and dispersed therein. Next, a perfluoroalkyl phosphate diethanolamine salt (A
G530, manufactured by Asahi Glass Co., Ltd.)
Mix at 60 ° C. for 4 hours. Thereafter, the mixture was neutralized with hydrochloric acid, filtered, washed several times with water, and dried to obtain mother particles. Next, 20 g of the base particles were treated in the same manner as in Example 2 to obtain a composite resin powder of the present invention. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with the titanium oxide particles.

Example 5 Base particles were obtained in the same manner as in Example 4. Next, the same processing as in Example 1 was performed using the mother particles to obtain a composite resin powder of the present invention. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with fine zinc oxide.

Example 6 Base particles were obtained in the same manner as in Example 1. Next, when the particle size is 0.
The same treatment as in Example 1 was carried out except that 10 g of 27 μm fine zinc oxide particles were used to obtain a composite resin powder of the present invention.
The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with fine zinc oxide.

Example 7 Base particles were obtained in the same manner as in Example 1. Next, the particle diameter 30
Example 1 except that a fine particle titanium oxide of ~ 70 nm was used.
To obtain a composite resin powder of the present invention. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with the titanium oxide particles.

Example 8 Base particles were obtained in the same manner as in Example 1. Next, 20 g of the mother particles and 10 g of fine particles of zinc oxide (fine zinc white) coated with silicone resin having a particle diameter of 0.27 μm were sufficiently mixed. After that, this was charged into a rotary ball mill and treated for 8 hours.
A composite resin powder of the present invention was obtained. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with fine zinc oxide.

Example 9 Base particles were obtained in the same manner as in Example 1. Next, 20 g of the mother particles and 10 g of silicone-coated fine particle titanium oxide (MT 600 ks) having a particle diameter of 30 to 70 nm were sufficiently mixed. Thereafter, this was charged in a rotary ball mill and treated for 8 hours to obtain a composite resin powder of the present invention. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with the titanium oxide particles.

Example 10 Nylon resin powder having an average particle diameter of 5 μm (SP-500)
The mother particles were obtained in the same manner as in Example 4 except for using. Next, 20 g of the mother particles and 10 g of silicone-coated fine particle titanium oxide (MT 600 ks) having a particle diameter of 30 to 70 nm were sufficiently mixed. Thereafter, this was charged in a rotary ball mill and treated for 8 hours to obtain a composite resin powder of the present invention. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the nylon resin powder was completely covered with fine particle titanium oxide.

Example 11 Base particles were obtained in the same manner as in Example 10. Next, 20 g of the mother particles and 10 g of silicone-coated fine zinc oxide particles (fine zinc oxide) having a particle diameter of 0.27 μm were sufficiently mixed and charged into a rotary ball mill, and each was charged for 8 hours, 10 hours or 12 hours.
After treating for a time, the composite resin powder of the present invention was obtained. The composite resin powder obtained as described above was confirmed by an electron microscope that the surface of the nylon resin powder was completely covered with the fine zinc oxide particles regardless of the treatment time.

Comparative Example 2 A composite resin powder was obtained by treating for 8 hours, 10 hours or 12 hours in the same manner as in Example 11 except that a nylon resin (SP-500) without surface treatment was used.

The composite resin powder obtained in Example 11 and Comparative Example 2 for each treatment time was observed with an electron microscope, and the adhesion state and deformation of zinc oxide were evaluated. The evaluation criteria for the adhered state are the same as described above. Table 2 shows the results.

[0038]

[Table 2]

Example 12 A round bottom flask was charged with 20 g of a silicone resin powder (Tospearl 145A) having an average particle size of 4.5 μm. next,
1 g of (C ₈ F ₁₇ CH ₂ CH ₂ ) P (O) OH dissolved in 200 ml of isopropanol by heating at 50 ° C. was added and mixed at 60 ° C. for 4 hours. Then 40-5
At 0 ° C., isopropanol was distilled off under reduced pressure and dried to obtain mother particles. Next, 20 g of the base particles and a particle size of 0.2
(C ₈ F ₁₇ CH ₂ CH ₂ ) P
(O) After sufficiently mixing 10 g of the finely divided zinc oxide treated with OH, the mixture was charged into a hybridizer, and the peripheral speed was 50 m / s.
For 3 minutes to obtain a composite resin powder of the present invention. The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with zinc oxide fine particles.

Example 13 A round-bottomed flask was charged with 20 g of a silicone resin powder having an average particle diameter of 10 μm (Trefil E-500, manufactured by Dow Corning Toray). Next, (C ₈ F ₁₇ CH ₂ CH ₂ ) P
1 g of (O) OH is added to 200 ml of isopropanol in 50 ml.
The solution which had been heated and melted at ℃ was added and mixed at 60 ℃ for 4 hours. Thereafter, isopropanol was distilled off at 40 to 50 ° C. under reduced pressure, and dried to obtain mother particles. Next, 200 g of the base particles and 100 g of silicone-coated fine particles of zinc oxide (fine zinc oxide) having a particle diameter of 0.27 μm were sufficiently mixed, and then charged into a rotary ball mill and treated for 8 hours to obtain a composite resin powder of the present invention. . The composite resin powder thus obtained was confirmed by an electron microscope that the surface of the silicone resin powder was completely covered with zinc oxide fine particles.

[0041]

[0042]

[0043]

[0044]

[0045]

[0046]

[0047]

Example 14 Using the composite resin powder obtained in Example 1, an emulsion having the following composition was produced by a conventional method. The obtained emulsion was excellent in use feeling and also excellent in ultraviolet ray preventing ability.

[0049]

(Components) (% by weight) Composite resin powder obtained in Example 1 20 Silicone-treated talc 5 Octyl p-methoxycinnamate 5 α-Monostearyl glyceryl ether 1.5 Polyoxyethylene (E. 0.20) ) Sorbitan monooleate 1 Beeswax 2 Lanolin 2 Squalane 10 Liquid paraffin 10 Preservatives Appropriate perfume Appropriate amount Purified water Balance

Example 15 Using the composite resin powder obtained in Example 2, an emulsion having the following composition was produced by a conventional method. The obtained emulsion was excellent in use feeling and also excellent in ultraviolet ray preventing ability.

[0051]

(Components) (% by weight) Composite resin powder obtained in Example 2 20 Silicone-treated talc 5 Octyl p-methoxycinnamate 5 α-Monostearyl glyceryl ether 1.5 Polyoxyethylene (EO20) ) Sorbitan monooleate 1 Beeswax 2 Lanolin 2 Squalane 10 Liquid paraffin 10 Preservatives Appropriate perfume Trace amount Purified water Balance

Example 16 Using the composite resin powder obtained in Example 1, a cream having the following composition was produced by a conventional method. The obtained cream was excellent in use feeling and also excellent in ultraviolet protection ability.

[0053]

(Component) (% by weight) Composite resin powder obtained in Example 1 20 Silicone-treated talc 1 Octyl p-methoxycinnamate 5 α-Monostearyl glyceryl ether 2 Polyoxyethylene (E. 0.20) sorbitan Monooleate 2 Beeswax 5 Lanolin 8 Squalane 35 Myristyl octyl dodecyl 1 Magnesium sulfate 0.5 Glycerin 5 Preservatives Appropriate perfume Appropriate purified water Balance

Example 17 Using the composite resin powder obtained in Example 2, a cream having the following composition was produced by a conventional method. The obtained cream was excellent in use feeling and also excellent in ultraviolet protection ability.

[0055]

(Component) (% by weight) Composite resin powder obtained in Example 2 15 Silicone-treated titanium 1 Fatty acid glycerin 3.5 Glyceryl monostearate 2 lipophilic polyoxyethylene (E. 0.20) sorbitan mono Oleic acid ester 2 Beeswax 5.5 Cetanol 4.5 Lanolin 7 Squalane 33 Propylene glycol 4.5 Preservatives Appropriate amount Antioxidant Appropriate amount Perfume Appropriate amount Purified water Balance

Example 18 Using the composite resin powder obtained in Example 3, a liquid foundation having the following composition was produced by a conventional method. The obtained liquid foundation was excellent in use feeling and also excellent in ultraviolet protection ability.

[0057]

(Component) (% by weight) Composite resin powder obtained in Example 3 10 Silicone-treated fine particle zinc oxide 10 Octyl α-dimethylaminobenzoate 5 Dimethylsiloxane / methyl (polyalkylene) siloxane copolymer 0.5 Methylpolysiloxane 10 Decamethylcyclopentanesiloxane 10 Preservatives Appropriate amount Perfume Appropriate amount Ethanol / water = 20/80 (w / w%) Balance

Example 19 Using the composite resin powder obtained in Example 4, a powder foundation having the following composition was produced by a conventional method. The obtained powder foundation was excellent in use feeling and also excellent in ultraviolet ray preventing ability.

[0059]

[Table 9] (Components) (% by weight) Composite resin powder obtained in Example 4 15 Silicone-treated fine particle titanium oxide 10 Talc 20 Bengala 0.8 Yellow iron oxide 2.5 Black iron oxide 0.1 Liquid paraffin 8 Preservative Appropriate amount Spice Appropriate amount Mica remaining

[0060]

[0061]

Example 20 Using the composite resin powder obtained in Example 12, an emulsion having the following composition was obtained by a conventional method. The obtained emulsion was excellent in use feeling and also excellent in ultraviolet ray preventing ability.

[0063]

(Component) (% by weight) Composite resin powder obtained in Example 12 20 Silicone-treated talc 5 Octyl p-methoxycinnamate 5 α-Monostearyl glyceryl ether 1.5 Polyoxyethylene (EO20) ) Sorbitan monooleate 1 Beeswax 2 Lanolin 2 Squalane 10 Liquid paraffin 10 Preservatives Appropriate perfume Trace amount Purified water Balance

[0064]

[0065]

Example 21 Using the composite resin powder obtained in Example 12, a cream having the following composition was obtained by a conventional method. The obtained cream was excellent in use feeling and also excellent in ultraviolet protection ability.

[0067]

(Component) (% by weight) Composite resin powder obtained in Example 12 15 Silicone-treated titanium oxide 1 Fatty acid glycerin 3.5 Glycerin monostearate 2 Polyoxyethylene (EO20) Sorbitan mono Oleic acid ester 2 Beeswax 5.5 Cetanol 4.5 Lanolin 7 Squalane 33 Propylene glycol 4.5 Preservatives Appropriate amount Antioxidant Appropriate amount Fragrance Trace amount Purified water Balance

Example 22 Using the composite resin powder obtained in Example 2, a liquid foundation having the following composition was obtained by a conventional method. The obtained liquid foundation was excellent in use feeling and also excellent in ultraviolet protection ability.

[0069]

(Component) (% by weight) Composite resin powder obtained in Example 2 Silicone-treated fine particle zinc oxide 10 Octyl α-dimethylaminobenzoate 5 Dimethylsiloxane / methyl (polyalkylene) siloxane copolymer 0.5 Methyl polysiloxane 10 Decamethylcyclopentanesiloxane 10 Preservatives Appropriate amount Fragrance Trace amount Ethyl alcohol / water = 20/80 (W / W%) Balance

Example 23 Using the composite resin powder obtained in Example 13, a liquid foundation having the following composition was obtained by a conventional method. The obtained liquid foundation was excellent in use feeling and also excellent in ultraviolet protection ability.

[0071]

(Component) (% by weight) Composite resin powder obtained in Example 13 15 Silicone-treated fine particle titanium oxide 10 Talc 20 Bengala 0.8 Yellow iron oxide 2.5 Black iron oxide 0.1 Liquid paraffin 8 Preservative Appropriate amount Spice Appropriate amount Mica remaining

[0072]

The composite resin powder of the present invention has a resin powder and zinc oxide or the like applied thereto after being treated with a surface treating agent. Therefore, the resin powder can be easily adhered to zinc oxide or the like, and there is no deformation of the composite resin powder itself as a product. Further, since the adherence between the resin powder and zinc oxide or the like is very large, the effect of preventing ultraviolet rays can be sufficiently exerted for a long period of time.
Further, since the cosmetic of the present invention contains such an excellent composite resin powder, it has a very good feeling in use and also has an excellent ultraviolet ray preventing effect. The cosmetic of the present invention is suitable as a sunscreen cosmetic, a UV care cosmetic, and a UV care foundation when used in combination with a pigment.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-190625 (JP, A) JP-A-3-181411 (JP, A) JP-A-3-200721 (JP, A) JP-A-5-2007 25019 (JP, A) JP-A-59-128322 (JP, A) JP-A-57-122931 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61K 7/00-7 / 44

Claims (2)

(57) [Claims] 1. A composite resin powder obtained by treating the surface of a resin powder with a surfactant having a perfluoroalkyl group and coating the surface with zinc oxide, titanium oxide or iron oxide. 2. A cosmetic comprising the composite resin powder according to claim 1.