JPH1135441A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject cosmetic which is excellent in the feeling on use due to the enhanced dispersion of the pigment and possesses excellent effect of blocking ultraviolet rays by formulating fine-grain titanium oxide having a specific grain shape and average grain size with an organic powder. SOLUTION: The objective cosmetic is obtained by formulating (A) preferably 0.5-80 wt.% of fine-grain titanium oxide which shows a spindle or needle grain shape and possesses the minor axis of 0.005-0.1 μm and the major axis of 0.01-0.5 μm with (B) preferably 0.5-80 wt.% of an organic powder (e.g. nylon, polyethylene, epoxy resin, etc.), containing an ultraviolet ray absorbent (e.g. 2-hydroxy-4- methoxybenzophenone, p-aminobenzoic acid, etc.), and/or an ultraviolet ray- scattering agent (e.g. titanium oxide, zinc oxide, etc.), having an average grain size of 0.01-0.1 μm. It is preferable that the average grain size of the compound B is 0.1-10 μm. Talc and kaolin can be formulated with the cosmetic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cosmetic comprising a fine particle titanium oxide having a specific particle shape and an average particle diameter, and an organic powder containing a UV absorber and / or a UV scattering agent. More particularly, the present invention relates to a cosmetic having improved dispersibility of a pigment, excellent feeling in use, and excellent ultraviolet blocking effect.

[0002]

2. Description of the Related Art Conventionally, in order to impart an ultraviolet ray blocking effect to cosmetics, a technique of blending an ultraviolet absorber or finely blending an inorganic compound such as titanium oxide, zinc oxide, cerium oxide, zirconium oxide or the like is known. was there.

[0003]

However, when the fine particle powder is blended into the cosmetic, the fine particle powder has a strong cohesive property, and thus has poor dispersibility and spreadability. Further, when a large amount of an ultraviolet absorber is added to cosmetics in order to enhance the effect of blocking ultraviolet light, there is a problem that stickiness and the like are caused, which is not preferable in use feeling. Therefore, there has been a demand for the development of a cosmetic having an excellent ultraviolet blocking effect, a good spread upon application, and a beautiful finish.

[0004]

In view of such circumstances, the present inventors have conducted intensive studies and as a result, have found that a fine particle titanium oxide having a specific particle shape and an average particle diameter, an ultraviolet absorber and / or an ultraviolet scattering agent are used. The present inventors have found that a cosmetic having the above requirements can be obtained by using the organic powder in combination with the organic powder, and have completed the present invention.

That is, the present invention relates to a fine particle titanium oxide having a spindle shape or a needle shape, a minor axis of 0.005 to 0.1 μm and a major axis of 0.01 to 0.5 μm, an ultraviolet absorber and / or an ultraviolet absorber. Another object of the present invention is to provide a cosmetic containing an organic powder containing an ultraviolet light scattering agent.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail. The component (A) used in the present invention has a spindle shape or a needle shape and a minor axis of 0.005 to 0.1 μm.
m, a particulate titanium oxide having a major axis of 0.01 to 0.5 μm, preferably a particulate titanium oxide having a minor axis of 0.005 to 0.02 μm and a major axis of 0.01 to 0.2 μm.
If the minor axis and the major axis are too large, the effect of blocking ultraviolet rays will be deteriorated. If the minor axis and the major axis are too small, the usability such as elongation and spreading will be impaired. The fine particle titanium oxide as the component (A) can be used in combination with one having a different particle shape and particle diameter, if necessary. For example, metal oxides, metal hydroxides, fluorine compounds, silicones can be used according to the purpose. It is also possible to use it after treating it with one or two or more of a system oil, metal soap, wax, oil and fat, hydrocarbon and the like. The blending amount of the component (A) of the present invention is not particularly limited, but is more preferably 0.5 to 80% by weight (hereinafter simply referred to as "%") in view of the ultraviolet ray blocking effect and the usability.

The organic powder containing the component (B) ultraviolet absorber and / or ultraviolet scattering agent used in the present invention is:
Organic powder composited with an ultraviolet absorber and / or an ultraviolet scattering agent. As a form of the composite, (1) an organic powder surface coated with an ultraviolet absorber and / or an ultraviolet scattering agent, (2) an organic powder mixed on the surface and inside, and (3) an organic powder Examples include those encapsulated in a powder, and a combination of these may be used.

As the organic powder used in the component (B) of the present invention, any organic powder generally used in cosmetics can be used. Examples thereof include nylon, polyethylene, polypropylene, polyester and polystyrene. ,
Styrene / acrylic copolymer, polymethyl methacrylate, homopolymer or copolymer of vinylidene chloride or acrylonitrile and methacrylic acid, epoxy resin,
Phenol resin, melamine resin, cellulose, polyolefin, silicone resin powder and the like can be mentioned. As the ultraviolet absorber used for the component (B) of the present invention, for example, 2-hydroxy-4-
Methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2-hydroxy-
Sodium 4-methoxybenzophenone-5-sulfonate, sodium 2,2′-dihydroxy-4,4′-dimethoxybenzophenone, sodium 2,2′-dihydroxy-4,4′-dimethoxybenzophenone-5-sulfonate,
2,4-dihydroxybenzophenone, 2,2 ′, 4
4′-tetrahydroxybenzophenone and the like,
Examples of the PABA system include paraaminobenzoic acid, ethyl paraaminobenzoate, glyceryl paraaminobenzoate, amyl paradimethylaminobenzoate, 2-ethylhexyl paraethylaminobenzoate, ethyl paradihydroxypropyl benzoate, and the like. As a system,
2-ethylhexyl p-methoxycinnamate, 2-ethoxyethyl 4-methoxycinnamate, and the like. Examples of salicylic acids include 2-ethylhexyl salicylate,
Phenyl salicylate, homomenthyl salicylate, etc., and 2- (2-hydroxy-5-methylphenyl) benzotriazole, 4-tert-butyl-
4'-methoxydibenzoylmethane, oxybenzone and the like. These UV absorbers may be used as a mixture of two or more kinds. Examples of the ultraviolet light scattering agent used in the component (B) of the present invention include titanium oxide, zinc oxide, zirconium oxide, cerium oxide, iron oxide and the like.
Those having an average particle diameter of 0.1 μm are excellent in the ultraviolet scattering effect. The particle shape of these ultraviolet scattering agents may be any of a granular shape, a needle shape, a rod shape, a flake shape, an amorphous shape and the like, and two or more kinds may be used as a mixture. These ultraviolet scattering agents may be a composite of two or more. The component (B) of the present invention may be used in addition to the ultraviolet absorber and / or the ultraviolet scattering agent, especially when the organic powder contains the ultraviolet absorber and / or the ultraviolet scattering agent. As a solvent or a dispersion medium of the ultraviolet scattering agent, an oil agent or the like usually used in cosmetics, or an antioxidant may be simultaneously contained.

The component (B) of the present invention preferably contains an ultraviolet absorber and / or an ultraviolet scattering agent in an organic powder in an amount of 0.1 to 60%, more preferably 0.5 to 50%. . When the content is within this range, an organic powder containing the ultraviolet absorbent and / or the ultraviolet scattering agent of the component (B) of the present invention, which is excellent in ultraviolet blocking ability, can be obtained. The component (B) of the present invention preferably has an average particle size of 0.1 to 10 μm. If the average particle diameter is smaller than 0.1 μm, the dispersibility in cosmetics is reduced, and if it exceeds 10 μm, the ultraviolet ray blocking ability tends to be reduced.

The method of compounding the ultraviolet absorber and / or the ultraviolet scattering agent with the organic powder is not particularly limited. For example, (1) the ultraviolet absorber and / or the ultraviolet scattering agent may be combined with ethanol or 2-propanol. A method in which an organic powder is added to a solution dissolved or dispersed in a solvent and stirred, and then the solvent is distilled off to coat the surface of the organic powder with an ultraviolet absorber and / or an ultraviolet scattering agent. An ultraviolet absorber and / or an ultraviolet scattering agent is mixed with a solution obtained by dissolving the body in an organic solvent, and the solution is powderized by spray drying or the like, and the ultraviolet absorber and / or the ultraviolet scattering agent are mixed on the surface and inside of the organic powder. And the like. As a method for producing an organic powder containing an ultraviolet absorber and / or an ultraviolet scattering agent, for example, (3) a monomer having a polymerizable unsaturated bond such as acrylic or styrene, and an ultraviolet absorber and / or Alternatively, an ultraviolet-ultraviolet scattering agent and a polymerization initiator are mixed and dispersed in an aqueous medium containing an appropriate emulsifying dispersant or the like so that oil droplets having a target particle diameter are formed,
Examples include a method of polymerizing and encapsulating the monomers.

The blending amount of the component (B) of the present invention in cosmetics is not particularly limited, but is more preferably 0.5 to 80%. Within this range, the effects of the present invention are better exhibited. If necessary, one or two or more of them can be used.

In the cosmetic of the present invention, components which are usually compounded in the cosmetic can be appropriately compounded as necessary so as not to impair the effects of the present invention. As a powder component, for example, inorganic substances such as inorganic pigments such as talc, kaolin, sericite, mica, magnesium carbonate, calcium carbonate, aluminum silicate, magnesium silicate, aluminum magnesium silicate, calcium silicate, and silicic anhydride Inorganic coloring pigments such as white pigments, red iron oxide, black iron oxide, black iron oxide, ultramarine blue, navy blue, carbon black, etc .; Organic color pigments, silicone resin powder, nylon powder, silk powder, polystyrene, polyethylene powder, crystalline cellulose, N-acyl lysine, and other organic powders are exemplified. It is also possible to use pigment-grade titanium oxide or fine-particle titanium oxide having various average particle diameters, particle size distributions and shapes, and composites of these with iron oxide, in particular within a range that does not impair the effects of the present invention. These powders may be subjected to a surface treatment using one or more of fluorine compounds, silicone compounds, metal soaps, waxes, oils, hydrocarbons and the like. Examples of the oil component include oils and fats such as olive oil, castor oil, jojoba oil, and mink oil, waxes such as beeswax, lanolin, candelilla wax, and liquid hydrocarbons such as liquid paraffin, squalane, petrolatum, paraffin wax, and microcrystalline wax. Fatty acids such as oleic stearate, higher alcohols such as cetanol, stearyl alcohol and behenyl alcohol, isoisopropyl myristate, glyceryl trioctanoate, esters such as diglyceryl triisostearate, lanolin fatty acid isopropyl, and lanolin derivatives such as lanolin alcohol;
Examples include silicone oils such as dimethylpolysilixane and methylphenylpolysiloxane, silicone oils modified with polyoxyalkylene and alkyl, and fluorine-based oils such as perfluorodecane, perfluorooctane, and perfluoroether. In addition, organic solvents, resins,
Plasticizers, preservatives, humectants, antioxidants, surfactants, cosmetic ingredients, fragrances, water-soluble polymers, water, alcohols and the like can be mentioned.

The cosmetics of the present invention include skin care cosmetics, make-up cosmetics, hair cosmetics and the like. The dosage form of the present invention is a powder, a solid powder, an oil-in-water emulsion,
Examples thereof include a water-in-oil type emulsion, a lotion, an oily solid, an oily liquid, a paste, and a multilayer. Among them, make-up cosmetics include foundation, white powder,
Examples include makeup base, blusher, lipstick, concealer, nail polish, eye products, sunscreen cosmetics, and the like.

[0014]

Next, the present invention will be further described with reference to examples. These do not limit the present invention in any way. (Ultraviolet absorbent-containing organic powder 1) 2-ethylhexyl p-methoxycinnamate was added to 10% of the total weight of 4-tert-butyl-
4′-methoxydibenzoylmethane containing 2% of the total weight of polymethyl methacrylate powder (average particle diameter 2 μm)
m).

(Ultraviolet absorbent-containing organic powder 2) Nylon powder (trade name O)
RGASOL2002 NATCOS; Elf Ato
chem S.C. A. (Average particle diameter: 6 μm), p-
2-ethylhexyl methoxycinnamate was added to 10
% Was obtained.

(Ultraviolet scattering agent-containing organic powder 3) 20% of the total weight of fine titanium oxide (average particle diameter 0.04 μm) is contained (mixed on the surface and inside) by the method (2) of the above-mentioned compounding method. The obtained polymethyl methacrylate powder (average particle diameter 8 μm) was obtained.

(Organic Powder 4 Containing Ultraviolet Absorber and Ultraviolet Scattering Agent) According to the above method (3), polymethyl methacrylate containing fine titanium oxide particles (average particle diameter 0.04 μm) is obtained. According to the method of (1), 2-ethylhexyl p-methoxycinnamate was coated, 50% of the total weight of the particulate titanium oxide was included, and 5% of the total weight of 2-ethylhexyl p-methoxycinnamate was coated. Polymethyl methacrylate powder (average particle size 3 μm)
I got

(Ultraviolet scattering agent-containing organic powder 5) Polymethyl methacrylate powder containing 40% of the total weight of fine cerium oxide (average particle diameter 0.03 μm) by the method (3) of the above-mentioned compounding method. (Average particle diameter: 4 μm).

Examples 1 to 6 and Comparative Examples 1 to 4: Solid Powder Cosmetic (Powder Foundation) Solid powder cosmetics (powder foundation) having the composition shown in Table 1 were prepared and used (lightly removed). , Good growth,
The uniformity of the finished film) was subjected to a sensory evaluation, and the ultraviolet blocking effect was measured and determined using an SPF analyzer. Table 1 also shows the results.

[0020]

[Table 1]

Note 1: Minor diameter 0.015 μm Long diameter 0.075 μm Note 2: Granular titanium oxide having an average particle diameter of 0.25 μm Note 3: Granular fine particle titanium oxide having an average particle diameter of 0.03 μm Note 4: Average particle diameter of 0. 04μm granular fine particle zinc oxide

(Preparation method) Components 1 to 13 were mixed with a Henschel mixer, and those obtained by heating and dissolving 14 to 18 were added, mixed and pulverized, and then pressed into a metal plate to obtain a solid powder cosmetic.

(Evaluation method) Evaluation items: Lightness of removal 2. Good spreadability 3. 3. Uniformity of finished film Ultraviolet ray blocking effect Evaluation and evaluation criteria: Evaluation items 1 to 3 are evaluation panel 20
A use test was performed by name, and a judgment was made according to the following criteria based on the average score of the five-grade evaluation. Evaluation criteria 5 points: Very good 4 points: Good 3 points: Normal 2 points: Bad 1 point: Very bad Judgment criteria ：: 4.0 points or more ○: 3.0 points or more and less than 4.0 points △: 2 2.0 points or more and less than 3.0 points ×: less than 2.0 points

Regarding the effect of blocking ultraviolet rays, SPF-29
A fixed amount of the sample was applied on a Transpore tape (manufactured by 3M) using 0ANALYZER (manufactured by OPTOMETRICS) to obtain a test sample. The measured value of the test sample was determined based on the following criteria. Judgment criteria SPF ：: 20 or more ○: 10 or more and less than 20 Δ: 5 or more and less than 10 ×: less than 5

As is clear from the results in Table 1, the solid powder cosmetics of Examples 1 to 6 of the present invention are superior in all of usability and ultraviolet blocking effect as compared with Comparative Examples 1 to 4. there were.

Example 7: White powder (pressed powder) (component) (%) Talc 30 2. Spindle-shaped fine particle titanium oxide (Note 1) 30 3. Organic powder containing ultraviolet absorber 1 30 4. Mica remaining 5. Bengara 0.26. Yellow iron oxide 0.57. Black iron oxide 0.05 8. Dimethyl polysiloxane 2 9 Liquid paraffin 3 10. Preservative appropriate amount 11. Appropriate amount of fragrance (Preparation method) Components 1 to 7 were mixed with a Henschel mixer, and a mixture obtained by heating and dissolving 8 to 11 was added and mixed, followed by pulverization, followed by press molding into a middle plate to obtain white powder. The white powder of the present invention had good usability and a high ultraviolet blocking effect.

Example 8: Oily compact foundation (component) (%) Titanium oxide 10 2. Needle-shaped fine particles of titanium oxide (Note 5) 25 3. 3. Organic powder containing ultraviolet absorber 14 Organic powder containing ultraviolet scattering agent 5 6 5. Talc 5 6. Bengara 1 7. Iron oxide yellow 1.5 1.5 8. Black iron oxide 0.5 9. Liquid paraffin balance 10. Dimethyl polysiloxane 10 11. Methylphenyl polysiloxane 10 12. Carnauba wax 1.5 13. Candelilla wax 3 14. Perfume Appropriate amount Note 5: Minor diameter 0.01 μm Long diameter 0.1 μm (Preparation method) Components 1 to 8 are mixed, added to a solution obtained by heating and dissolving 9 to 14, and kneaded with a three-roll mill.
This was melt-filled into an inner dish and cooled and solidified to obtain an oily compact foundation. The oily compact foundation of the present invention was excellent in usability and ultraviolet blocking effect.

[0028] (Manufacturing method) Components 1 to 5 are heated and dissolved, and those obtained by heating and dissolving 6 to 12 are added thereto, and the mixture is emulsified and mixed, and then cooled. A mixture of 13 to 18 and a mixture of 19 and O
/ W type emulsified foundation was obtained. The O / W type emulsified foundation of the present invention was excellent in usability and ultraviolet blocking effect.

[0029] (Manufacturing method) Components 1 to 6 are heated and dissolved, and those obtained by heating and dissolving 7 to 10 are added thereto. The mixture is emulsified and mixed, and then cooled. A mixture of 11 to 16 and 17 were added and mixed to obtain a two-layer foundation. The two-layer type foundation of the present invention was excellent in usability and ultraviolet blocking effect.

Example 11: Lipstick (Ingredient) (%) Polyisobutylene 5 2. Ceresin wax 10 3. Candelilla wax 5 4. Carnauba wax 3 5.2 Glyceryl 2-ethylhexanoate 20 6. Diglycerin triisostearate 20 7. Vaseline 5 8. Castor oil balance 9. Titanium oxide 0.5 10. Spindle-shaped fine particle titanium oxide (Note 1) 3 11. Organic powder containing ultraviolet absorber 2 8 12. Red No. 202 3 13. 13. Yellow No. 4 aluminum lake 1.5 Appropriate amount of fragrance (Preparation method) Components 1 to 8 were dissolved by heating, and a mixture of 9 to 13 was added thereto, followed by kneading with a three-roll mill.
This was heated, 14 was added and mixed, filled into a container, and cooled to obtain a lipstick. The lipstick of the present invention was excellent in usability and ultraviolet blocking effect.

[0031] (Preparation method) Components 1 to 5 are mixed and dissolved, and a mixture of 6 to 7 is added and mixed, and then 8 to 9 are added and emulsified. To this, 10 to 12 were added and mixed to obtain a sunscreen emulsion. The sunscreen emulsion of the present invention was excellent in usability and ultraviolet blocking effect.

[0030]

Industrial Applicability The cosmetic according to the present invention is used by containing fine particle titanium oxide having a specific particle shape and an average particle diameter and an organic powder containing an ultraviolet absorber and / or an ultraviolet scattering agent. It is very excellent in terms of properties and ultraviolet blocking effect.

Claims (3)

[Claims] 1. The following components (A) and (B): (A) a particle shape of a spindle or needle, and a minor axis of 0.0
Fine particle titanium oxide having a diameter of 0.5 to 0.1 μm and a major axis of 0.01 to 0.5 μm (B) A cosmetic comprising an organic powder containing an ultraviolet absorber and / or an ultraviolet scattering agent. 2. The cosmetic according to claim 1, wherein component (A) is contained at 0.5 to 80% by weight and component (B) is contained at 0.5 to 80% by weight. 3. The cosmetic according to claim 1, wherein the component (B) is an organic powder containing an ultraviolet absorber and / or an ultraviolet scattering agent.