JPH06345632A - Composite resin powder and cosmetic containing the same powder - Google Patents

Abstract

PURPOSE:To obtain composite resin powder having good feeling of use and excellent ultraviolet preventing effect by firmly bonding inorganic powder to the surface of resin powder. CONSTITUTION:The composite resin powder is obtained by coating the surface of resin powder surface-treated by silicone treatment, amino acid treatment, metal soap treatment, lecithin treatment, dialkylphosphoric acid treatment, silica alumina treatment, wax treatment, fluorine treatment, etc., especially, treatment with a surfactant having a perfluoroalkyl group with zinc oxide, titanium oxide or iron oxide. The surface treating agent and the zinc oxide, etc., are used in amounts of 0.01-30wt.%, preferably 0.5-15wt.% and 2-500wt.%, preferably 10-100wt.%, respectively. Preferable average particle diameter of the resultant composite resin powder is in the range of 0.1-50mum, especially 0.2-20mum. It is preferable from the view point of effect for preventing ultraviolet rays to include 1-25wt.% of the composite resin powder in a cosmetic. Since the coating is carried out through surface treatment, coating with the inorganic powder is readily carried out and adhesion between the resin powder and the inorganic material is also extremely large.

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 anti-UV effect, and a cosmetic containing the same.

[0002]

2. Description of the Related Art Conventionally, by modifying the surface of a powder, color development, wettability,
Powder materials having new properties such as fluidity, dispersibility and feel have been developed. In particular, zinc oxide, titanium oxide, iron oxide, and other inorganic powders that have an ultraviolet scattering effect are added to polyethylene resin, polypropylene resin, polystyrene resin,
BACKGROUND ART Composite powders prepared by adhering and fixing a polyester resin, a polyamide resin, an acrylic resin, a fluororesin, a silicone resin or the like on a resin surface with a ball mill, an ong mill, a screen mill, a hybridizer or the like are blended in a sunscreen cosmetic.

However, in general, it is difficult to deposit the inorganic powder such as zinc oxide on the surface of the resin powder. Therefore, when the treatment time is lengthened to improve the adhesion of the inorganic powder such as zinc oxide to the resin powder. In addition, since the heat resistance and mechanical strength of the resin powder are low, the resin may decompose into monomers or the resin powder particles may be deformed due to excessive heat or mechanical load accompanying the treatment. is there. There is a problem that the generated monomer causes an offensive odor, and the deformed resin powder particles have poor dispersibility and feel.

[0004]

Therefore, there has been a demand for a composite resin powder in which an inorganic powder is strongly adhered to the surface of the resin powder and which is excellent in the feeling of use and the effect of preventing ultraviolet rays.

[0005]

Under the circumstances, as a result of intensive studies by the present inventors, it was found that by coating a surface-treated resin powder with zinc oxide or the like, these were firmly attached to the surface of the resin powder. The present invention has been completed by finding that a composite resin powder which is adhered, is excellent in the feeling of use, and has an excellent effect of preventing ultraviolet rays can be obtained.

That is, the present invention provides a composite resin powder characterized in that the surface of the surface-treated resin powder is coated with zinc oxide, titanium oxide or iron oxide.

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

Specific examples of these resin powders include nylon resins such as nylon fine particles SP-500.
(Made by Toray); as polyethylene resin, for example, Flow Beads CL2080LL (made by Sumitomo Seika); as polystyrene resin, for example, Fine Pearl 3000SP.
(Manufactured by Nihon Koken Co., Ltd.); as the silicone resin, for example, Tospearl 103, 105, 108, 120, 130, 1
Polymethylsilsesquioxane powder such as 45A, 240, 3120 (above, manufactured by Toshiba Silicone Co., Ltd.), Trefil E-500, E-501, E-600, E-601,
E-602, E-603, E-900, E-925, E
Methyl polysiloxane powder such as -930 (above, manufactured by Toray Dow Corning Co., Ltd.) and the like can be mentioned.

The surface treatment used in the present invention includes silicone treatment, amino acid treatment, metal soap treatment, lecithin treatment, dialkylphosphoric acid treatment, silica-alumina treatment, wax treatment, fluorine treatment and the like. Of these,
Fluorine treatment is preferable, and treatment with a surfactant having a perfluoroalkyl group is particularly preferable. As the surfactant having a perfluoroalkyl group, any surfactant having a polar group may be used. For example, polyfluoroalkylphosphoric acid (US Pat. No. 3,632,744), perfluoroalkylphosphoric acid ester diethanolamine salt ( JP-A-62-250074), perfluoroalkylsilane, perfluoroalcohol,
Examples thereof include perfluoroepoxy compounds, sulphoamide type fluorophosphoric acid, perfluorosulfates and perfluorocarboxylates.

The zinc oxide, titanium oxide or iron oxide (hereinafter referred to as "zinc oxide etc." when the three kinds are collectively referred to) used in the present invention has been conventionally used for cosmetics, quasi drugs, external medicines and the like. These are known inorganic powders, and their particle size and shape are not particularly limited. Among them, as zinc oxide and the like, fine particle zinc oxide (Japanese Patent Publication No. 62-228006), flaky zinc oxide (Japanese Patent Publication No. 1-175921), and titanium oxide fine particle (Japanese Patent Publication No. 1-1511) are ultraviolet rays. As a commercial product, for example, fine zinc oxide fine particles are used as fine zinc oxide (manufactured by Sakai Chemical Industry Co., Ltd.); be able to. Further, these zinc oxides and the like may be surface-treated such as silicone treatment, amino acid treatment, metal soap treatment, lecithin treatment, dialkylphosphoric acid treatment, silica-alumina treatment, wax treatment and fluorine treatment. Furthermore, these zinc oxides and the like can be used in appropriate combination of two or more kinds.

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 to be 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,
Processing can be performed using an Ong mill, pot mill, mortar, attritor, hybridizer, or the like. In addition,
When the surface treatment is carried out using a surfactant having a perfluoroalkyl group, the surfactant may be used as it is or in an appropriate solvent (eg, ethanol, water, isopropyl alcohol, chloroform, Freon R113, hexafluorometaxylene, etc.). It is preferable to dissolve and add by spraying or dropping, and after uniformly dispersing, it is preferably carried out at room temperature or by heating and drying. Further, among the above-mentioned surfactants, the surfactants having a perfluoroalkyl group having 8 or more carbon atoms have remarkably low fluidity. Therefore, when they are used, fluorocarbons such as Freon R113 and hexafluoromethaxylene are used. It is preferably used by dissolving it in a solvent.

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

Next, as a method for coating the surface-treated resin powder with zinc oxide or the like, the same method as 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, more preferably 10 to 100% by weight based on the weight of the surface-treated resin powder. The average particle size of the composite resin powder of the present invention thus obtained is preferably 0.1 to 50 μm, particularly preferably 0.2 to 20 μm.

The cosmetic of the present invention can be manufactured 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 kind of the cosmetic, but from the viewpoints of sufficiently exerting the effect of preventing ultraviolet rays, manufacturing cost, etc. It is preferably from 0.1 to 50% by weight, especially from 1 to 25% by weight.

In addition to the above-mentioned composite resin powder, the cosmetic of the present invention may contain components used in ordinary cosmetics, quasi drugs, external medicines, etc. within a range that does not impair the effects of the present invention. It can be blended appropriately. Examples of such components include extenders such as mica, talc, sericite, and kaolin; inorganic pigments such as pearl; red No. 202, 226;
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 treated with silicone, metal soap, N-acylglutamic acid, fluorine, etc. Hydrocarbons such as solid or liquid paraffin, crystal oil, ceresin, ozokerite, montan wax; vegetable oils such as olive, jiro, carnauba wax, lanolin, and gallow, animal fats and oils; stearic acid, palmitic acid, oleic acid, Glycerin monostearate, glycerin distearate, glycerin monooleate, isopropyl myristate, isopropyl stearate, butyl stearate and other fatty acids and their esters; dex Phosphorus fatty acid ester; Silicone oil such as methylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentanesiloxane; ethyl alcohol, isopropyl alcohol, cetyl alcohol, stearyl alcohol, palmityl alcohol, hexyldecyl alcohol, etc. Examples thereof include alcohols; polyhydric alcohols such as glycol, glycerin, and sorbitol as moisturizers; surfactants; thickeners; preservatives; antioxidants.

Further, the cosmetics of the present invention may be blended with known ultraviolet absorbers in combination. Examples of such an ultraviolet absorber include p-methylbenzylidene,
D, L-camphor or sulfonic acid sodium salt thereof,
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, benzoylketone derivative and the like can be mentioned.

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

[0021]

The present invention will be described below with reference to examples.
The invention is not limited to these examples.

Example 1 A round-bottomed flask (or kneader) had an average particle size of 4.5 μm.
20 g of m silicone resin powder (Tospearl 145A, manufactured by Toshiba Silicone Co., Ltd.) was added. Next, (C8F17CH2
A solution prepared by dissolving 1 g of CH2) P (O) OH in 200 g of isopropyl alcohol by heating at 50 ° C was added and mixed at 60 ° C for 4 hours. Then, isopropyl alcohol was distilled off under reduced pressure at 40 to 50 ° C., and dried to obtain mother particles. 20 g of the mother particles and 10 g of silicone resin-coated fine particles of zinc oxide (fine zinc white, manufactured by Sakai Chemical Co., Ltd.) having a particle diameter of 0.27 μm were sufficiently mixed and then 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. It was confirmed by an electron microscope that the surface of the silicone resin powder of the composite resin powder thus obtained was completely covered with the zinc oxide fine particles.

Comparative Example 1 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 the unadhered child particles are Exists. Δ: Unadhered child particles are present. X: Not adhered.

[0025]

[Table 1]

Example 2 Mother particles were obtained in the same manner as in Example 1. Next, 20 g of the mother particles and a silicone resin-coated fine particle titanium oxide (MT600ks, manufactured by Teikoku Kako Co., Ltd.) 10 having a particle diameter of 30 to 70 nm.
After thoroughly mixing g, charge into a hybridizer,
The composite resin powder of the present invention was obtained by treating at a peripheral speed of 50 m / s for 3 minutes. It was confirmed by an electron microscope that the composite resin powder thus obtained was one in which the surface of the silicone resin powder was completely covered with fine particle titanium oxide.

Example 3 Nylon resin powder having an average particle size of 5 μm (SP-50
No. 0, manufactured by Toray Industries, Inc.) was used to obtain mother particles in the same manner as in Example 1. Next, 20 g of the mother particles and a particle diameter of 0.27
After thoroughly mixing 10 g of silicone resin-coated fine particles of zinc oxide (fine zinc oxide) of μm, 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. With the electron microscope, it was confirmed that the surface of the nylon resin powder of the composite resin powder thus obtained was completely covered with the particulate zinc oxide.

Example 4 200 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 were placed in a round bottom flask and dispersed. Next, perfluoroalkyl phosphate ester diethanolamine salt (A
25 g of 30% aqueous solution of G530, manufactured by Asahi Glass Co., Ltd.,
Mix for 4 hours at 60 ° C. Then, hydrochloric acid was added for neutralization, followed by filtration, washing with water several times, and drying to obtain mother particles. Next, 20 g of the mother particles were used and treated in the same manner as in Example 2 to obtain the composite resin powder of the present invention. It was confirmed by an electron microscope that the composite resin powder thus obtained was one in which the surface of the silicone resin powder was completely covered with fine particle titanium oxide.

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

Example 6 Mother particles were obtained in the same manner as in Example 1. Next, the particle size is 0.
A composite resin powder of the present invention was obtained by treating in the same manner as in Example 1 except that 10 g of 27 μm fine particle zinc oxide was used.
It was confirmed by an electron microscope that the surface of the silicone resin powder of the composite resin powder thus obtained was completely covered with the zinc oxide fine particles.

Example 7 Mother particles were obtained in the same manner as in Example 1. Next, particle size 30
Example 1 with the exception of using ~ 70 nm particulate titanium oxide.
The same process as above was performed to obtain the composite resin powder of the present invention. It was confirmed by an electron microscope that the composite resin powder thus obtained was one in which the surface of the silicone resin powder was completely covered with fine particle titanium oxide.

Example 8 Mother particles were obtained in the same manner as in Example 1. Next, 20 g of the mother particles and 10 g of silicone resin-coated fine particle zinc oxide (fine zinc white) 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. It was confirmed by an electron microscope that the surface of the silicone resin powder of the composite resin powder thus obtained was completely covered with the zinc oxide fine particles.

Example 9 Mother particles were obtained in the same manner as in Example 1. Next, 20 g of the mother particles and 10 g of silicon-coated fine particle titanium oxide (MT600ks) having a particle diameter of 30 to 70 nm were sufficiently mixed. Then, this was charged into a rotary ball mill and treated for 8 hours to obtain a composite resin powder of the present invention. It was confirmed by an electron microscope that the composite resin powder thus obtained was one in which the surface of the silicone resin powder was completely covered with fine particle titanium oxide.

Example 10 Nylon resin powder (SP-500) having an average particle size of 5 μm
Mother particles were obtained in the same manner as in Example 4 except that was used. Next, 20 g of the mother particles and 10 g of silicon-coated fine particle titanium oxide (MT600ks) having a particle diameter of 30 to 70 nm were sufficiently mixed. Then, this was 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 nylon resin powder was completely covered with fine titanium oxide particles.

Example 11 Mother 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 particle zinc oxide (fine zinc oxide) having a particle diameter of 0.27 μm were sufficiently mixed and charged in a rotary ball mill for 8 hours, 10 hours, or 12 hours, respectively.
After processing for a period of time, a composite resin powder of the present invention was obtained. It was confirmed by an electron microscope that the surface of the nylon resin powder of the composite resin powder thus obtained was completely covered with the particulate zinc oxide at any 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) not surface-treated was used.

The composite resin powders obtained in Example 11 and Comparative Example 2 at each processing time were observed with an electron microscope to evaluate the adhered state and deformation of zinc oxide. The evaluation criteria of the adhered state are the same as above. The results are shown in Table 2.

[0038]

[Table 2]

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

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

Example 14 30 g of a silicone resin powder (Tospearl 145A) having an average particle size of 4.5 μm and 1.5 g of white wax of triglyceride behenic acid (Syncrowax HR-C, manufactured by Dai-ichi Croda Chemicals) were rotary type. It was placed in a ball mill and treated for 20 minutes to obtain mother particles. Next, this mother particle 2
0 g and 10 g of fine particles of zinc oxide (fine zinc oxide) coated with silicone resin having a particle diameter of 0.27 μm were sufficiently mixed and then 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. It was It was confirmed by an electron microscope that the surface of the silicone resin powder of the composite resin powder thus obtained was completely covered with the zinc oxide fine particles.

Comparative Example 3 Silicone resin without surface treatment (Tospearl 145
A composite resin powder was produced in the same manner as in Example 14 except that A) was used.

The composite resin powders obtained in Example 14 and Comparative Example 3 were observed with an electron microscope, and the adhered state was evaluated according to the same criteria as described above.

[0044]

[Table 3]

Example 15 Nylon resin powder (SP-500) having an average particle size of 5 μm
30 g of white behenic acid triglyceride wax (1.5 g of Syncrowax HR-C, manufactured by Dai-ichi Croda Chemicals Co., Ltd.) was placed in a rotary ball mill and treated for 20 minutes to obtain mother particles. Next, 20 g of the mother particles and 10 g of fine particles of zinc oxide (fine zinc oxide) coated with silicone resin having a particle diameter of 0.27 μm were sufficiently mixed and then charged into a hybridizer, which was treated at a peripheral speed of 50 m / s for 3 minutes to obtain the present invention. A composite resin powder of With the electron microscope, it was confirmed that the surface of the nylon resin powder of the composite resin powder thus obtained was completely covered with the particulate zinc oxide.

Example 16 30 g of a silicone resin powder (Tospearl 145A) having an average particle diameter of 4.5 μm and 1.5 g of dihexadecanyl phosphate.
And were dissolved and dispersed in hexane at 60 ° C. and refluxed for 2 hours, and then hexane was removed to obtain mother particles. Next, 20 g of the mother particles and 10 g of fine particle titanium oxide (MT600ks) having a particle diameter of 30 to 70 nm are sufficiently mixed and then 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. It was confirmed by an electron microscope that the composite resin powder thus obtained was one in which the surface of the silicone resin powder was completely covered with fine particle titanium oxide.

Example 17 30 g of a silicone resin powder (Tospearl 145A) having an average particle size of 4.5 μm and 1.5 g of lecithin were used.
Surface treatment was performed according to the method described in JP-A-184571 to obtain mother particles. Next, 20 g of the mother particles and 10 g of fine particles of zinc oxide (fine zinc oxide) coated with silicone resin having a particle diameter of 0.27 μm were sufficiently mixed and then charged into a hybridizer, which was treated at a peripheral speed of 50 m / s for 3 minutes to obtain the present invention. A composite resin powder of It was confirmed by an electron microscope that the surface of the silicone resin powder of the composite resin powder thus obtained was completely covered with the zinc oxide fine particles.

Example 18 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 the feeling of use and also excellent in the ability to prevent ultraviolet rays.

[0049]

(Component) (wt%) 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 proper amount Perfume proper amount Purified water balance

Example 19 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 the feeling of use and also excellent in the ability to prevent ultraviolet rays.

[0051]

(Component) (wt%) Composite powder of Production Example 20 Silicone treated talc 5 Octyl p-methoxycinnamate 5 α-Monostearyl glyceryl ether 1.5 Polyoxyethylene (EO20) sorbitan Monooleic acid ester 1 Beeswax 2 Lanolin 2 Squalane 10 Liquid paraffin 10 Preservative Suitable amount Perfume Trace amount Purified water Balance

Example 20 Using the composite resin powder obtained in Example 1, a cream having the following composition was produced by a conventional method. The obtained cream had an excellent feeling of use and an excellent ability to prevent ultraviolet rays.

[0053]

(Component) (wt%) 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 Monooleic acid ester 2 Beeswax 5 Lanolin 8 Squalane 35 Myristyl octyldodecyl 1 Magnesium sulfate 0.5 Glycerin 5 Preservative proper amount Perfume proper amount Purified water balance

Example 21 Using the composite resin powder obtained in Example 2, a cream having the following composition was produced by a conventional method. The obtained cream had an excellent feeling of use and an excellent ability to prevent ultraviolet rays.

[0055]

(Component) (wt%) Composite resin powder obtained in Example 2 15 Silicone treated titanium 1 Fatty acid glycerin 3.5 Lipophilic monostearic acid glycerin ester 2 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 proper amount Antioxidant proper amount Perfume proper amount Purified water balance

Example 22 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 the feeling of use and also excellent in the ability to prevent ultraviolet rays.

[0057]

Table 8 (Components) (wt%) Composite resin powder obtained in Example 3 10 Silicone treated fine particles Zinc oxide 10 Octyl dimethyl α-dimethylaminobenzoate 5 Dimethylsiloxane / methyl (polyalkylene) siloxane copolymer 0.5 Methylpolysiloxane 10 Decamethylcyclopentanesiloxane 10 Preservative Suitable amount Perfume Suitable amount Ethanol / water = 20/80 (w / w%) Balance

Example 23 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 the feeling of use and also excellent in the ability to prevent ultraviolet rays.

[0059]

(Components) (wt%) Composite resin powder obtained in Example 4 15 Silicone treated fine particles Titanium oxide 10 Talc 20 Red iron oxide 0.8 Yellow iron oxide 2.5 Black iron oxide 0.1 Liquid paraffin 8 Preservative Appropriate amount Perfume Appropriate amount Mica Remaining amount

Example 24 Using the composite resin powder obtained in Example 14, an emulsion having the following composition was obtained by a conventional method. The obtained emulsion was excellent in the feeling of use and also excellent in the ability to prevent ultraviolet rays.

[0061]

(Component) (wt%) Composite powder of Production Example 1 20 Silicone treated talc 5 Octyl p-methoxycinnamate 5 α-Monostearyl glyceryl ether 1.5 Polyoxyethylene (EO20) sorbitan Monooleic acid ester 1 Beeswax 2 Lanolin 2 Squalane 10 Liquid paraffin 10 Preservative Suitable amount Perfume Trace amount Purified water Balance

Example 25 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 the feeling of use and also excellent in the ability to prevent ultraviolet rays.

[0063]

Table 11 (Components) (wt%) Composite powder of Production Example 2 20 Silicone treated talc 5 Octyl p-methoxycinnamate 5 α-monostearyl glyceryl ether 1.5 Polyoxyethylene (EO20) sorbitan Monooleic acid ester 1 Beeswax 2 Lanolin 2 Squalane 10 Liquid paraffin 10 Preservative Suitable amount Perfume Trace amount Purified water Balance

Example 26 Using the composite resin powder obtained in Example 14, a cream having the following composition was obtained by a conventional method. The obtained cream had an excellent feeling of use and an excellent ability to prevent ultraviolet rays.

[0065]

Table 12 (Components) (wt%) Composite powder of Production Example 20 Silicone treated talc 1 Octyl p-methoxycinnamate 5 α-Monostearyl glyceryl ether 2 Polyoxyethylene (EO20) sorbitan monoolein Acid ester 2 Beeswax 5 Lanolin 8 Squalane 35 Myristyl octyldodecyl 1 Magnesium sulfate 0.5 Glycerin 5 Preservative Suitable amount Perfume Trace amount

Example 27 Using the composite resin powder obtained in Example 12, a cream having the following composition was obtained by a conventional method. The obtained cream had an excellent feeling of use and an excellent ability to prevent ultraviolet rays.

[0067]

Table 13 (Components) (wt%) Composite powder of Production Example 15 Silicone-treated titanium oxide 1 Fatty acid glycerin 3.5 Lipophilic glyceryl monostearate 2 Polyoxyethylene (EO20) sorbitan monooleic acid Ester 2 Beeswax 5.5 Cetanol 4.5 Lanolin 7 Squalane 33 Propylene Glycol 4.5 Preservative Suitable amount Antioxidant Suitable amount Fragrance Trace amount Purified water Balance

Example 28 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 the feeling of use and also excellent in the ability to prevent ultraviolet rays.

[0069]

Table 14 (Components) (wt%) Composite powder of Production Example 10 Silicone treated fine particles Zinc oxide 10 α-Dimethylaminobenzoic acid octyl 5 Dimethyl siloxane-methyl (polyalkylene) siloxane copolymer 0.5 Methyl poly Siloxane 10 Decamethylcyclopentane Siloxane 10 Preservative Suitable amount Perfume Trace amount Ethyl alcohol / water = 20/80 (W / W%) Balance

Example 29 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 the feeling of use and also excellent in the ability to prevent ultraviolet rays.

[0071]

Table 15 (Components) (wt%) Composite powder of Production Example 15 Silicone treated fine particles Titanium oxide 10 Talc 20 Red iron oxide 0.8 Yellow iron oxide 2.5 Black iron oxide 0.1 Liquid paraffin 8 Preservative Suitable amount Perfume Appropriate amount Mica remaining amount

[0072]

EFFECT OF THE INVENTION The composite resin powder of the present invention is obtained by coating resin powder, zinc oxide and the like with a surface treating agent. Therefore, since the resin powder and the zinc oxide or the like can be easily attached, the composite resin powder itself as a product is not deformed. Furthermore, since the adhesive force between the resin powder and zinc oxide or the like is also very large, the effect of preventing ultraviolet rays can be sufficiently exerted for a long time.
Moreover, since the cosmetic of the present invention contains such an excellent composite resin powder, it has a very good feeling in use and an excellent anti-UV 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.

Claims (3)

[Claims] 1. A composite resin powder, characterized in that the surface of a surface-treated resin powder is coated with zinc oxide, titanium oxide or iron oxide. 2. The composite resin powder according to claim 1, wherein the surface treatment is a treatment with a surfactant having a perfluoroalkyl group. 3. A cosmetic comprising the composite resin powder according to claim 1 or 2.