JP3530052B2 - Surface-treated powder having a surface coated with a transparent oily film containing titanium oxide and a method for producing the same, and a skin composition, a paint composition, a resin composition, and a container containing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a surface-treated powder having excellent water resistance and ultraviolet absorption, lipophilicity and good dispersibility in an oily solvent, a method for producing the same, and its application. The present invention relates to a skin composition, a coating composition and a resin composition, and a container.

More specifically, it can be obtained by adding an organic compound having an atom having a lone electron pair and / or a polar group in the molecule to a titanium alkoxide or an oily solution or dispersion thereof, and then adding water for hydrolysis. A transparent oil dispersion of titanium oxide, or a surface-treated powder obtained by concentrating the oil dispersion or coating a surface with a film-forming composition obtained by removing a dispersion medium from the oil dispersion, and a method for producing the same. And a composition for skin, a coating composition, a resin composition and a container obtained by applying these.

[0003]

2. Description of the Related Art Titanium oxide has a high UV shielding effect and is often used as a pigment in cosmetics and the like for preventing discoloration of paints due to UV rays and for preventing inflammation due to UV rays. To obtain titanium oxide in the form of flakes or fine particles suitable for this purpose, the sol-gel method, whose shape and particle size are easily controlled, is widely used. However, in this method, the addition of water is indispensable for hydrolyzing the titanium alkoxide, and a lower alcohol such as butanol is used as the dispersion medium. Therefore, the titanium oxide obtained by the sol-gel method is poor in lipophilicity, a transparent state cannot be obtained when dispersed in an oily material, and the dispersibility is improved when blended in an oily cosmetic or oily paint. It was necessary to perform a hydrophobizing treatment in order to impart water resistance or water resistance. Further, when the surface is coated with titanium oxide to make the powder have ultraviolet absorptivity, it is necessary to further perform a hydrophobic treatment in order to improve the dispersibility in an oily solvent, and in the case of a colored pigment, It also often affected the color development of the powder itself.

Further, in resin compositions and containers which require resistance to ultraviolet rays, such as packaging materials and containers for foods, cosmetics, pharmaceuticals, materials for medical instruments, etc., an ultraviolet absorber is kneaded or contains an ultraviolet absorber. It was necessary to perform a surface treatment with the polymer compound. Therefore, deterioration and bleeding of the ultraviolet absorber itself due to exposure to ultraviolet rays are likely to occur, which has been a problem in terms of quality maintenance and safety.

[0005]

Therefore, in the present invention, a surface-treated powder having excellent water resistance and ultraviolet absorption, lipophilicity and good dispersibility in an oily solvent is obtained. It was intended to be applied in the fields of coating composition, resin composition and container.

[0006]

[Means for Solving the Problems] As a result of various studies to solve the above problems, when titanium alkoxide or an oily solution or dispersion thereof is allowed to undergo a hydrolysis reaction, particles of titanium oxide are converted from titanium alkoxide. During the growth process, by adding an appropriate amount of an organic compound having an atom having a lone electron pair and / or a polar group in the molecule, titanium oxide particles dispersed in an oil dispersion medium in a transparent state can be obtained. A product obtained by concentrating the dispersion and removing the dispersion medium has an excellent film-forming ability, and with these, or the lipophilic oxidation obtained by removing the dispersion medium from the oily dispersion and drying or further calcining. Good results can be obtained by surface-treating the powder with titanium powder, and the surface-treated powder is well applied to skin compositions, coating compositions, etc. It found that to obtain, and have completed the present invention.

That is, in the present invention, one or more organic compounds having an atom and / or a polar group having a lone electron pair in the molecule and water are added to a titanium alkoxide or an oily solution or dispersion thereof. And hydrolyzed to obtain a transparent titanium oxide oil dispersion, further concentrating this oil dispersion, or removing the dispersion medium from the oil dispersion,
A lipophilic titanium oxide powder is obtained by obtaining a transparent film-forming composition, or removing the dispersion medium from the oily dispersion and then drying or further firing. Then, the powder is surface-treated with one or more of these oily dispersions, film-forming compositions and lipophilic titanium oxides, and applied to various fields such as skin compositions and coating compositions. In addition, when the titanium alkoxide is hydrolyzed, one of the hydrolysis inhibitors is used.
A gel of flaky particles can be selectively obtained by coexisting one kind or two or more kinds. If necessary, an acid or a base or a salt formed by these can be used as a catalyst.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Titanium alkoxides usable in the present invention include titanium tetramethoxide, titanium tetraethoxide, titanium tetranormal propoxide, titanium tetraisopropoxide, titanium tetranormal butoxide, titanium tetraisobutoxide, and titanium. Tetratertiary butoxide and the like can be mentioned. Such a titanium alkoxide can be directly dissolved or dispersed in an organic compound having an atom having a lone electron pair and / or a polar group in the molecule in a liquid state, or can be dissolved or dispersed in an oily solvent to form an organic compound. The compound is added and allowed to act. The concentration of the titanium alkoxide solution or dispersion is preferably 0.0001M to 6.0M, and particularly preferably 0.01M to 4.0M.

Examples of the oily solvent for dissolving or dispersing the titanium alkoxide include normal alkanes such as normal hexane, normal heptane, and normal octane, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-Undecene and other normal alkenes, benzene,
Benzene such as methylbenzene and ethylbenzene, hexanol, heptanol, octanol, nonanol,
Alcohols such as decanol, propyl ether, isopropyl ether, butyl ether, isobutyl ether, normal pentyl ether, isopentyl ether, methyl butyl ether, methyl isobutyl ether, methyl normal pentyl ether, methyl isopentyl ether, ethyl propyl ether, ethyl isopropyl ether, Ethers such as ethyl butyl ether, ethyl isobutyl ether, ethyl normal pentyl ether, ethyl isopentyl ether, allyl ether, ethyl allyl ether, anisole, phenetol, phenyl ether, benzyl ether, ethyl acetate,
Esters of isopropyl acetate, butyl acetate, isobutyl acetate, methyl propionate, ethyl propionate, propyl propionate, butyl propionate, isobutyl propionate, methyl butyrate, ethyl butyrate, propyl butyrate, isopropyl butyrate, butyl butyrate, isobutyl butyrate, etc. Etc. can be used. Also, avocado oil, almond oil,
Liquid vegetable oils such as olive oil, sesame oil, southern oil, safflower oil, soybean oil, camellia oil, corn oil, rapeseed oil, persic oil, castor oil, cottonseed oil, peanut oil, jojoba oil, mink oil, egg yolk oil, liquid lanolin Liquid animal oils such as liquid paraffin, isoparaffin, squalane,
Hydrocarbon oils such as pristane, oleyl alcohol, 2-
Liquid higher alcohols such as hexyldecanol, isostearyl alcohol, 2-octyldodecanol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monophenyl ether, ethylene glycol mono-2-ethylhexyl ether, ethylene glycol Dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether,
Diethylene glycol dibutyl ether, ethylene glycol methyl ether acetate, ethylene glycol ethyl ether acetate, ethylene glycol butyl ether acetate, ethylene glycol phenyl ether acetate, diethylene glycol ethyl ether acetate, diethylene glycol butyl ether acetate, and other dihydric alcohol derivatives, cetyl octanoate, isopropyl myristate. , Isopropyl palmitate, hexyl laurate, oleyl oleate, decyl oleate, octyldodecyl myristate, hexyldecyl dimethyloctanoate, diethyl phthalate, dibutyl phthalate, propylene glycol dioleate,
Liquid ester oils such as glyceryl tri-2-ethylhexanoate and trimethylolpropane tri-2-ethylhexanoate,
Oily substances generally used for cosmetics or paints such as silicone oils such as dimethylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane can be used. In the present invention, one kind or two or more kinds are selected from these and used.

In the present invention, an organic compound is allowed to act on the titanium alkoxide to control the hydrolysis of the titanium alkoxide, and as the organic compound usable in the present invention, an atom having a lone electron pair in the molecule or The organic compound having a polar group is not particularly limited as long as it is liquid or can be dissolved or dispersed in an oily solvent. For example, carboxylic acids such as lactic acid, tartaric acid, citric acid, malic acid, myristic acid, palmitic acid, stearic acid, isooctanoic acid, isomyristic acid, isopalmitic acid, isostearic acid, hydroxypalmitic acid, hydroxystearic acid, acetylacetone, ethylene Compounds having chelating action such as glycol, diethylene glycol, propylene glycol, dipropylene glycol, ethylenediamine, ethylenediaminetetraacetic acid, dithizone, dimethylglyoxime, 8-quinolinol,
Decylamine, undecylamine, dodecylamine, tetradecylamine, hexadecylamine, octadecylamine, dihexylamine, dioctylamine, didecylamine, N-methyldecylamine, N-methyllaurylamine, N-methylpalmitylamine, N-ethyl Amines such as palmitylamine, hexylamide, octylamide, decylamide, undecylamide, laurylamide, myristylamide, palmitylamide, stearylamide, and other amides, myristic acid monoethanolamide, stearic acid monoethanolamide, myristin Fatty acid alkanolamides such as acid diethanolamide and stearic acid diethanolamide, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, dihirate B carboxymethyl dimethoxy benzophenone, 2,4-dihydroxybenzophenone, benzophenone derivatives such as tetra-hydroxybenzophenone, para-aminobenzoic acid, ethyl para-aminobenzoic acid,
Paraaminobenzoic acid derivatives such as pentyl paradimethylaminobenzoate and octyl paradimethylaminobenzoate,
Ethyl paramethoxycinnamate, isopropyl paramethoxycinnamate, octyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate, etc., methoxycinnamic acid derivatives, octyl salicylate, phenyl salicylate, homomenthyl salicylate, dipropylene glycol salicylate, ethylene glycol salicylate, myristyl salicylate, UV rays such as salicylic acid derivatives such as methyl salicylate, urocanic acid, ethyl urocanate, 4-tert-butyl-4'-methoxydibenzoylmethane, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, methyl anthranilate Absorbent, Rhodamine B stearate (red 21
5), tetrachlorotetrabromofluorescein (red 218), tetrabromofluorescein (red 22)
3), Sudan III (red 225), dibromofluorescein (daily 201), diiodofluorescein (daily 206), fluorescein (yellow 2)
01), Quinoline Yellow SS (Yellow No. 204), Quinizarin Green SS (Green No. 202), Alizurin Purple SS (Purple No. 201), Medicinal Scarlet (Red No. 501), Oil Red XO (Red No. 505), Oil-soluble pigments such as orange SS (daidai color 403), yellow AB (yellow 404), yellow 405 (yellow 405), sudan blue B (blue 403), etc. may be mentioned, and one or two of them may be used. Select and use at least one species. The addition amount to the titanium alkoxide is preferably about 0.001 to 4 mol per 1 mol of the titanium alkoxide.

In the present invention, it is also possible to add a hydrolysis inhibitor which controls the hydrolysis during the polycondensation of titanium alkoxide to titanium oxide. By adding a hydrolysis inhibitor, it is possible to control the progress of hydrolysis of the titanium alkoxide and selectively obtain flaky gel particles.

The above-mentioned hydrolysis inhibitor is selected from a chelating agent and an electron-donating reagent, and includes alkylene glycols such as diethylene glycol, triethylene glycol, polyethylene glycol and polypropylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether and ethylene glycol. Alkyl ethers of alkylene glycols such as monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, tetraethylene glycol monomethyl ether, tetraethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, ethylene glycol monophenyl ether, Ethylene glycol mono Aryl ethers of alkylene glycols such Nji ether, beta-diketones such as acetylacetone, ethylene diamine, include such amines such as triethanolamine, it is used to select one or more from these. Among the above, alkylene glycols are particularly preferably used.

The above hydrolysis inhibitor is preferably added in a proportion of 1 to 20 mol, more preferably 2 to 10 mol, per 1 mol of titanium alkoxide. When the addition amount of the hydrolysis inhibitor is less than 1 mol, the effect of controlling the hydrolysis of titanium alkoxide cannot be sufficiently obtained, and when it exceeds 20 mol, the hydrolysis of titanium alkoxide does not proceed sufficiently, which is not preferable. .

Further, in the present invention, an acid or a base, or a salt formed by these may be added as a catalyst, if necessary. Such acids or bases include strong acids such as hydrochloric acid and sulfuric acid, carbonic acid, formic acid, acetic acid, myristic acid,
A weak acid such as palmitic acid and stearic acid, a strong base such as sodium hydroxide and potassium hydroxide, and a weak base such as hydroxyammonium, acetamidine and hydrazine are used. As the salt, a salt obtained by neutralizing a weak acid and a weak base, a weak acid and a strong base, and a strong acid and a weak base is preferably used,
Particularly preferred are sodium carbonate, ammonium carbonate, sodium hydrogen carbonate, ammonium hydrogen carbonate,
Mention may be made of sodium acetate, ammonium acetate and sodium stearate. The addition amount of these acids, bases or salts is 10 ⁻³ to 10 per mol of titanium.
A range of ^-4 mol is suitable.

As a method for preparing an oily dispersion of titanium oxide in the present invention, titanium alkoxide is first dissolved or dispersed in one or more oily solvents, and the oily solution or dispersion is stirred while the molecules are dissolved. One or more kinds of organic compounds having an atom having a lone electron pair and / or a polar group therein are dissolved or dispersed in an oily solvent and added, and then water is added for hydrolysis. It is appropriate that the amount of water added is about 0.001 to 4 mol per 1 mol of titanium alkoxide. Atoms with lone electron pairs in the molecule and /
Or when the organic compound having a polar group is liquid,
You may add the organic compound directly to titanium alkoxide. The shape of titanium oxide produced can be controlled by adjusting the type of organic compound having an atom having a lone electron pair and / or a polar group in the molecule and the amount added to the titanium alkoxide. Then, by concentrating the obtained oil dispersion of titanium oxide or almost completely removing the dispersion medium, a transparent film-forming composition can be obtained, and the dispersion medium was removed from the oil dispersion. The lipophilic titanium oxide powder can be obtained by post-drying or further baking at 200 ° C. to 700 ° C. for about 2 to 4 hours.

Further, in the present invention, a flaky gel can be selectively obtained by dissolving or dispersing the hydrolysis inhibitor in one or more oily solvents and adding it. When an acid or base or salt is added as a catalyst, these oily solutions or dispersions may be added at the same time as water, or may be added after the hydrolysis has progressed to a certain extent, depending on the time of addition. It is possible to control the shape of the particles. Further, as the oily solvent or the organic compound having an atom having a lone electron pair and / or a polar group in the molecule, one having a hydrolysis suppressing action may be used.

With respect to the above reaction system, the stirring was stopped and 2
Let stand for ~ 24 hours to continue reaction. If necessary, add 5 to 7 times the molar amount of acid or salt to titanium to stop the reaction, and add excess water to confirm that unreacted titanium alkoxide does not remain. For this, wash and remove with excess water. The acid or salt added to stop the reaction is not particularly limited.

When a volatile oily solvent or organic compound is used as a dispersion medium, the above titanium oxide oil dispersion can be concentrated by air drying, distillation under reduced pressure or the like to further remove the dispersion medium. On the other hand, when an oily solvent or an organic compound having poor volatility is used, a volatile oily solvent such as cyclohexane is added and azeotropically distilled to concentrate and remove.

In the present invention, an oily dispersion of titanium oxide or a film-forming composition obtained from the dispersion is dissolved or dispersed in a solvent, sprayed onto the powder serving as the core, kneaded, and then about 100 ° C. The surface coating treatment is performed by repeating the step of drying for about 10 minutes. Examples of the solvent include alcohols such as ethanol and butanol, hydrocarbons such as isoparaffin, xylene and cyclohexane, esters such as ethyl acetate and butyl acetate, ketones such as acetone, ethyl methyl ketone and cyclohexanone, diethylene glycol and ethylene glycol mono. Ethers such as ethyl ether and ethylene glycol monobutyl ether can be used. The concentration of titanium oxide in the oil dispersion of titanium oxide used for the coating treatment is preferably about 5 to 50% by weight, and the coating amount is finally 10 to 40% by weight based on the powder as the core. Is appropriate.

In the present invention, the film-forming composition obtained from the above-mentioned titanium oxide oil dispersion and the lipophilic oxidation obtained by removing the dispersion medium from the titanium oxide oil dispersion and drying or further firing. 1 selected from titanium powder
It is also possible to obtain a surface-treated powder coated with the above-mentioned film-forming composition or the like by mixing and grinding one kind or two or more kinds and a powder serving as a core in a ball mill. The mixing ratio of the film-forming composition or the like and the powder serving as the core during the surface treatment is appropriately in the range of 1:20 to 1: 1 in terms of weight ratio. The surface coverage of the powder can be controlled by the mixing ratio.

The surface-treated powder according to the present invention is excellent in water resistance, has excellent transparency and ultraviolet absorptivity, has good dispersibility in an oily solvent, and is used as a powder component or a pigment for external preparations for skin and external preparations. It can be added to skin compositions such as cosmetics to impart an ultraviolet protection effect, and can be applied to coating compositions, resin compositions, containers and the like to impart light resistance.
In the case of a colored pigment, coloring of the core pigment itself is not impaired.

In the present invention, one or more of the above-mentioned surface-treated powders containing an oily dispersion of titanium oxide or the like is contained as a powder component or pigment to prevent the harmful effects of ultraviolet rays on the skin. It is possible to obtain a dermatological composition effective for Such dermatological compositions include external skin preparations such as lotions, gels, ointments and pasta preparations, skin cosmetics such as two- or three-layered lotions, emulsions, creams, gels and packs, and makeup base lotions. , Base cosmetics such as make-up base creams, emulsions, creams, oily ointment types, oily sticks, powdery foundations, make-up cosmetics such as eye colors and cheek colors, lip balms, lip sticks Etc. can be provided as a lip cosmetic. In addition,
Regarding the blending amount of the surface-treated powder according to the present invention, an amount that can be blended as a powder or a pigment component in the composition for skin is usually blended.

The dermatological composition according to the present invention includes, in addition to the above-mentioned surface-treated powder of an oily dispersion of titanium oxide, oils and fats, waxes, hydrocarbons, fatty acids, higher alcohols and esters. , Lower alcohols, polyhydric alcohols, moisturizers, cell activating agents, anti-inflammatory agents, whitening agents, bactericides,
Materials such as surfactants, water-soluble polymer compounds, antibacterial and antifungal agents, pigments, and fragrances, which are generally mixed with cosmetics, can be contained. In addition to the surface-treated powder according to the present invention, powders such as extender pigments, coloring pigments and pearlescent pigments can be contained. In particular, in a sunscreen composition for the purpose of protection against ultraviolet rays, powders having an ultraviolet scattering effect such as particulate titanium oxide and zinc oxide which have been conventionally used, and an ultraviolet absorber can be used in combination.

In the present invention, one or more surface-treated powders of the above-mentioned oily dispersion of titanium oxide or the like may be contained as a pigment component to provide a coating composition. In these paints, linseed oil, soybean oil, dehydrated castor oil, pentaerythritol, alkyd resin, styrenized oil, maleic oxide oil, urethane dried oil and other synthetic drying oils, shellac, copal, dammar and other natural resins, lime rosin ， Processed resin such as rosin ester, phenol resin, urea resin, melamine resin, phthalic acid resin,
A coating film-forming component such as synthetic resin such as vinyl resin, cellulose derivative such as nitrocellulose, acetylcellulose, benzylcellulose, rubber derivative such as chlorinated rubber, cyclized rubber, synthetic rubber and the like may be used together. Further, a film forming auxiliary component such as a desiccant, a curing agent, a plasticizer, a dispersant, and an emulsifier can be contained. Examples of the solvent or diluent include alcohols such as ethanol and butanol, hydrocarbons such as petroleum spirit, kerosene and xylene, esters such as ethyl acetate and butyl acetate, ketones such as acetone, ethyl methyl ketone and cyclohexanone, and diethylene glycol. , Ethers such as ethylene glycol monoethyl ether and ethylene glycol monobutyl ether, and chloride compounds such as trichloroethylene and methylene chloride can be used. Further, in addition to the surface-treated powder according to the present invention, oil-soluble dyes such as orange 5, red 24, red 25 and black 5, calcium carbonate, barium sulfate,
Inorganic pigments such as zinc oxide, chrome yellow, cadmium yellow, nickel titanium yellow, red iron oxide, cadmium red, molybdenum red, navy blue, ultramarine pigments, pigment yellows, pigment oranges, pigment reds, pigment violets ，
Pigment blues, pigment greens, pigment browns, pigment blacks and other organic pigments may also be contained.

Further, in the present invention, a styrene resin,
Oxidation of synthetic resin such as olefin resin, methacrylic resin, polyvinyl chloride resin, polyvinylidene chloride resin, polyamide resin, polyester resin, polyurethane resin, polycarbonate resin, polyacetal resin, polyphenylene resin, fluororesin, silicone resin, etc. By kneading the surface-treated powder with an oily dispersion of titanium or the like and then molding, it is possible to obtain a resin composition having ultraviolet absorbability. The mixing weight ratio of the surface-treated powder with the oily dispersion of titanium oxide or the like when kneading with the synthetic resin is appropriately 10 to 100 parts by weight with respect to 100 parts by weight of the synthetic resin.

The resin composition containing the surface-treated powder of an oily dispersion of titanium oxide or the like is mixed in a Henschel mixer, a tumbler or the like, and then mixed in a uniaxial or multiaxial extruder, a Banbury mixer, a kneader, a roller or the like. It is prepared by melt-kneading in a kneading device. The obtained resin composition is molded into various molded bodies by methods such as injection molding, extrusion molding, blow molding, inflation molding and vacuum molding. Also, films and biaxially stretched films, sheets,
After molding into foam beads or the like, it may be molded into a desired molded body.

After molding the above synthetic resins, the surface-treated powder of the titanium oxide oil dispersion according to the present invention is dissolved or dispersed in a solvent and sprayed by spray injection or the like. By coating, it is possible to impart ultraviolet absorptivity.

A container having an ultraviolet absorbing property can be obtained by molding one or more of the above resin compositions. The surface of the container molded with a resin may be coated with one or more surface-treated powders of the titanium oxide oil dispersion according to the present invention by spraying or the like.

[0029]

The present invention will be described in more detail with reference to examples.

[Production Examples 1 to 3] Liquid paraffin dispersion of titanium oxide treated with isostearic acid Titanium ethoxide was dissolved in liquid paraffin to prepare a 0.2 M solution. While stirring 1 liter of this solution, the amount of isostearic acid shown in Table 1 was added as a liquid paraffin solution, and then the amount of water shown in Table 1 was added. After stirring was stopped and the mixture was allowed to stand at room temperature for 24 hours, stearic acid 1.4 was added.
The reaction was stopped by adding mol, and water was added for washing to obtain an oily dispersion of titanium oxide treated with isostearic acid.

[0031]

[Table 1]

[Example 1] Titanium oxide dispersion coated with isostearic acid-coated talc The liquid paraffin dispersion of titanium oxide treated with isostearic acid according to Production Example 1 was adjusted to a titanium oxide concentration of 2
It was adjusted to 0% by weight, sprayed little by little on 100 g of talc, mixed, kneaded and dried at 100 ° C. for 10 minutes. This operation was repeated until the coating treatment amount of the liquid paraffin dispersion of titanium oxide reached 30% by weight, which was set as Example 1.

Example 2 Titanium oxide-containing film-coated nylon powder treated with isostearic acid The liquid paraffin dispersion of titanium oxide treated with isostearic acid according to Production Example 2 was allowed to stand in a warm bath for 20 hours. Liquid paraffin was evaporated and concentrated to obtain a film-forming composition. This film-forming composition was dispersed in octamethylcyclotetrasiloxane so that the titanium oxide concentration was 40% by weight, sprayed little by little on 100 g of nylon powder, mixed, and dried at 100 ° C. for 10 minutes. . This operation is repeated until the coating treatment amount with the titanium oxide-containing film forming composition reaches 40% by weight, and the surface is coated with the film forming composition containing titanium oxide reacted with isostearic acid of Production Example 2. A treated nylon powder was obtained and named as Example 2.

[Example 3] Titanium oxide-containing film-coated red iron oxide treated with isostearic acid The liquid paraffin dispersion of titanium oxide treated with isostearic acid according to Production Example 3 was allowed to stand for 20 hours in a warm bath. Liquid paraffin was evaporated and concentrated to obtain a film-forming composition. 30 g of this film-forming composition and red iron oxide 1
20 g was mixed and processed in a ball mill for 4 hours to obtain red iron oxide whose surface was coated with the film-forming composition containing titanium oxide reacted with isostearic acid of Production Example 3 and designated as Example 3. .

Production Example 4 Dimethylpolysiloxane Dispersion of Titanium Oxide Treated with Isostearic Acid A 1.5M dimethylpolysiloxane solution of titanium ethoxide was prepared, and 1 liter of the solution was stirred to give isostearic acid 75 mol were dissolved in dimethylpolysiloxane and added, and then 0.75 mol of water and 7.5 mol of diethylene glycol were added. After stirring was stopped and the mixture was allowed to stand at room temperature for 5 days, 9.0 mol of stearic acid was added to stop the reaction, water was added to wash, and the mixture was concentrated under reduced pressure at 50 ° C.

[Example 4] Titanium oxide dispersion coated with isostearic acid The synthetic dimethyl polysiloxane dispersion of titanium oxide treated with isostearic acid of Production Example 4 was prepared to have a titanium oxide concentration of 25% by weight. 100 g of synthetic mica
Spray a small amount against and mix, and after kneading 1
Dry for 0 minutes. This operation is repeated until the coating amount of the titanium oxide-containing film-forming composition reaches 35% by weight, and the surface is coated with the dimethylpolysiloxane dispersion of titanium oxide treated with isostearic acid of Production Example 4. Synthetic mica was obtained and named as Example 4.

[Production Example 5] Film-forming composition containing titanium oxide treated with 8-quinolinol Titanium ethoxide was dissolved in isoparaffin to give 0.2M.
Solution. While stirring 1 liter of this solution,
0.001 mol of 8-quinolinol was added as an isoparaffin solution, followed by 0.1 mol of water. After stirring was stopped and left standing at room temperature for 24 hours, 1.4 mol of stearic acid was added to stop the reaction, water was added to wash, and the mixture was left standing in a warm bath for 20 hours to evaporate isoparaffin. And removed.

Example 5 Titanium Oxide-Containing Film Treatment Treated with 8-Quinolinol The film-forming composition containing titanium oxide reacted with 8-quinolinol according to Production Example 5 was adjusted to a titanium oxide concentration. It was dispersed in cyclohexane so as to be 20% by weight, sprayed little by little with respect to 100 g of kaolin, mixed, kneaded, and dried at 100 ° C. for 10 minutes. This operation was repeated until the coating treatment amount with the titanium oxide-containing film forming composition reached 35% by weight, and the surface was formed with the film forming composition containing titanium oxide treated with 8-quinolinol according to Production Example 5. Kaolin coated with was obtained and was designated as Example 5.

Example 6 Titanium Oxide Powder Coating Treatment with Isostearic Acid Titanium Oxide The liquid paraffin dispersion of titanium oxide treated with isostearic acid according to the above Production Example 1 was allowed to stand in a warm bath for 25 hours. It was then dried to obtain a titanium oxide powder on which isostearic acid acted. This powder (30 g) and titanium oxide (150 g) were mixed and ground in a ball mill for 4 hours to obtain titanium oxide coated with titanium oxide powder treated with isostearic acid.

Example 7 Sericite coated with lipophilic titanium oxide powder The liquid paraffin dispersion of titanium oxide treated with isostearic acid according to the above Production Example 2 was allowed to stand in a warm bath for 25 hours and then dried. Further, it was calcined at 400 ° C. for 4 hours to obtain a lipophilic titanium oxide powder. 40 g of this powder and 160 g of sericite were mixed and ground in a ball mill for 4 hours,
A sericite coated with a lipophilic titanium oxide powder was obtained, which was referred to as Example 7.

Example 8 Titanium Oxide Powder Coating Talc Treated with 8-Quinolinol The film-forming composition containing titanium oxide treated with 8-quinolinol according to Production Example 5 above was pulverized after drying. 8-
Titanium oxide powder treated with quinolinol was obtained. This powder (25 g) and talc (75 g) were mixed and ground in a ball mill for 4 hours to obtain talc coated with the titanium oxide powder.

Each powder of Examples 1 to 8 of the present invention is
All showed high water repellency. For these, the ultraviolet absorption spectrum was measured with an integrating sphere and the SPF value was measured with an SPF analyzer. The above results are summarized in Table 2. The effects of isostearic acid and 8-quinolinol were confirmed by infrared absorption spectrum.

[0043]

[Table 2]

As is clear from Table 2, in Examples 1 to 8 of the present invention, a high absorption maximum was observed at 262 to 275 nm, and in Examples 5 and 8, the wavelength was further increased. Absorption due to 8-quinolinol was observed. Further, when the SPF value was measured by an SPF analyzer, a significant increase in the SPF value was observed in any of the Examples, as compared with the core powder that was not coated with an oily dispersion of titanium oxide or the like.

Next, the formulations of the examples of the dermatological composition according to the present invention will be shown.

Example 9 Bilayer Lotion (1) Squalane 8.00 (wt%) (2) β-Carotene 0.02 (3) Ethanol 10.00 (4) Polyoxyethylene (20E.O. ) Sorbitan 0.20 Tetraoleic acid ester (5) Methyl paraoxybenzoate 0.10 (6) Perfume 0.10 (7) Dispersion of titanium oxide dispersed with isostearic acid 10.00 Coated talc (Example 1) (8) Sorbitol 1.00 (9) Glycerin 1.00 (10) Purified water 69.58 Manufacturing method: (2) was added to (1), and (4) to (6) were dissolved in (3). Add an alcohol portion to make it uniform, and further disperse (7) to form an oil layer. A solution obtained by dissolving (8) and (9) in (10) is used as an aqueous layer, and an oil layer is added to this aqueous layer at room temperature, followed by stirring and mixing.

Example 10 Oil-in-Water Emulsion (1) Squalane 6.0 (wt%) (2) Cetanol 1.0 (3) Beeswax 0.5 (4) Vaseline 2.0 (5) Dimethylpolysiloxane 2.0 (6) Polyoxyethylene (10 E.O.) monooleic acid 1.0 ester (7) Glyceryl monostearic acid ester 1.0 (8) Titanium oxide-containing 5.0 treated with isostearic acid 5.0 Film treatment Nylon powder (Example 2) (9) Glycerin 4.0 (10) 1,3-butylene glycol 4.0 (11) Methyl paraoxybenzoate 0.1 (12) Purified water 68.3 (13) Perfume 0.1. 1 (14) Ethanol 5.0 Manufacturing method: Mix the oil phase components of (1) to (7), heat and dissolve, and add (8) and disperse to 70 ° C. On the other hand, (9) ~ (11) to (12)
To dissolve and heat to 70 ° C. The oil phase is added to this aqueous phase and the mixture is uniformly emulsified with a homomixer. Subsequently, the mixture is cooled, and (13) is dissolved in (14) at 40 ° C., and the mixture is added and mixed.

[Example 11] Oil-in-water cream (1) Vaseline 5.0 (% by weight) (2) Stearyl alcohol 3.0 (3) Stearic acid 3.0 (4) Glyceryl monostearate 3.0 (5) Squalane 10.0 (6) Tocopherol acetate 0.2 (7) Titanium oxide dispersion treated with isostearic acid 10.0 Coated talc (Example 1) (8) 1,3-Butylene glycol 7. 0 (9) Potassium hydroxide 0.2 (10) Methyl paraoxybenzoate 0.1 (11) Purified water 58.4 (12) Perfume 0.1 Production method: Mix the oil phase components of (1) to (6) Then, (7) is added to the material melted by heating and dispersed, and the temperature is brought to 70 ° C. On the other hand, (8) ~ (1
Add 0) to (11), dissolve and heat to 70 ° C. The oil phase is added to this aqueous phase with stirring, emulsified by a homogenizer and then cooled, and (12) is added and mixed at 40 ° C.

[Example 12] Sunscreen water-in-oil cream (1) Squalane 40.0 (% by weight) (2) Glyceryl diisostearate 3.0 (3) Organically modified montmorillonite 1.5 (4) Oxybenzone 2.0 (5) Titanium oxide containing 5.0 treated with isostearic acid 5.0 Film treated nylon powder (Example 2) (6) Titanium oxide powder treated with isostearic acid 3.0 Coated titanium oxide (Example) 6) (7) 1,3-Butylene glycol 5.0 (8) Methyl paraoxybenzoate 0.1 (9) Purified water 40.3 (10) Perfume 0.1 Manufacturing method: Oil of (1) to (4) Mix the phase components, dissolve by heating, (5),
After dispersing (6), the temperature is raised to 70 ° C. On the other hand, (7) to (9) are mixed, dissolved and heated to 70 ° C. This aqueous phase is added to the oil phase while stirring, emulsified by a homogenizer, then cooled, and (10) is added and mixed at 40 ° C.

Example 13 Makeup Base Cream (1) Stearic Acid 10.0 (wt%) (2) Squalane 6.0 (3) Cetanol 1.5 (4) Cetyl Octanoate 2.0 (5) Self-emulsifying glyceryl monostearate ester 2.0 (6) Titanium oxide containing 0.5 treated with isostearic acid 0.5 Coating-treated red iron oxide (Example 3) (7) Titanium oxide powder treated with isostearic acid 1.0 Coated titanium oxide (Example 6) (8) Propylene glycol 8.0 (9) Potassium hydroxide 0.2 (10) Methyl paraoxybenzoate 0.1 (11) Purified water 68.4 (12) Yellow iron oxide 0.2 (13) Perfume 0.1 Manufacturing method: The oil phase components of (1) to (5) are mixed and dissolved by heating, (6),
Add (7) and disperse to 75 ° C. On the other hand, mix (8) ~ (11) water phase components, dissolve and heat to 75 ℃ (12)
And disperse with a homomixer. The oil phase component is added to the water phase component, the mixture is uniformly emulsified with a homomixer, then cooled, and (13) is added and mixed at 40 ° C.

[Example 14] Oily ointment type foundation (1) Solid paraffin 3.00 (% by weight) (2) Microcrystalline wax 6.00 (3) Beeswax 2.00 (4) Vaseline 12.00 (5) Lanolin acetate 1.00 (6) Squalane 6.00 (7) Isopropyl palmitate 18.00 (8) Tocopherol acetate 0.20 (9) Butyl paraoxybenzoate 0.02 (10) 8-Quinolinol oxidation Titanium powder 17.48 Coated talc (Example 8) (11) Contains titanium oxide treated with 8-quinolinol 15.00 Film-treated kaolin (Example 5) (12) Contained titanium oxide treated with isostearic acid 1.00 Film-coated red iron oxide (Example 3) (13) Titanium oxide 15.50 (14) Yellow iron oxide 2.50 (15) Black iron oxide 0.20 (16) Perfume 0.10 Production method: (1) to Mix (9), 85 Dissolve by heating to (10) to (12) in this order and disperse, then add (13) and disperse, and further mix (14) and (15) and pulverize After adding with stirring, disperse by grinding with a colloid mill. After adding (16) and degassing, pour into a container at 70 ° C. and cool.

[Example 15] Oily stick-shaped foundation (1) Solid paraffin 3.00 (wt%) (2) Microcrystalline wax 7.00 (3) Vaseline 15.00 (4) Dimethylpolysiloxane 3.00 ( 5) Squalane 5.00 (6) Isopropyl palmitate 17.00 (7) Tocopherol acetate 0.20 (8) Butyl paraoxybenzoate 0.02 (9) Titanium oxide 19.68 (10) Yellow iron oxide 3.00 (11) Black iron oxide 0.20 (12) Titanium oxide-containing kaolin treated with 8-quinolinol 20.00 Film-treated kaolin (Example 5) (13) Titanium oxide dispersion treated with isostearic acid 2.80 Coating Treated talc (Example 1) (14) Titanium oxide dispersion treated with isostearic acid 3.00 Coated synthetic mica (Example 4) (15) Titanium oxide treated with isostearic acid Containing 1.00 coating treatment rouge (Example 3) (16) Perfume 0.10 Preparation: (1) mixing the base ingredients to (8), it is heated and melted at 70 ° C. to 80 ° C.. In addition, (9) ~ (11), then (12) ~ (15)
Are mixed, crushed, added and dispersed, and then ground and dispersed by a colloid mill. Then, (16) is added and the mixture is filled in a mold and solidified by cooling.

[Example 16] Powder foundation (1) Liquid paraffin 5.0 (wt%) (2) Octyldodecyl myristate 2.5 (3) Vaseline 2.5 (4) Methyl paraoxybenzoate 0.1 ( 5) Fragrance 0.1 (6) Titanium oxide 12.0 (7) Titanium oxide powder treated with 8-quinolinol 42.3 Coated talc (Example 8) (8) Titanium oxide treated with isostearic acid Content 10.0 Film-treated nylon powder (Example 2) (9) Titanium oxide dispersion treated with isostearic acid 20.0 Coated synthetic mica (Example 4) (10) Red iron oxide 3.0 (11) Yellow oxidation Iron 2.0 (12) Black iron oxide 0.5 Manufacturing method: The pigment components of (6) to (12) are mixed and pulverized through a pulverizer. This is moved to a high speed blender, (1) to (5) are mixed and added, and they are mixed uniformly. This is processed with a crusher,
After adjusting the particle size through a sieve, it is filled in a gold plate and compression molded.

[Example 17] Two-way foundation (1) Liquid paraffin 4.0 (wt%) (2) Squalane 2.0 (3) Methylphenylpolysiloxane 4.0 (4) Methyl paraoxybenzoate 0.1 ( 5) Fragrance 0.1 (6) Titanium oxide powder treated with isostearic acid 15.0 Coated titanium oxide (Example 6) (7) Lipophilic titanium oxide powder coated sericite 25.0 (Example) 7) (8) Titanium oxide dispersion treated with isostearic acid 30.2 Coated talc (Example 1) (9) Titanium oxide-containing 5.0 treated with 8-quinolinol 5.0 Film-treated kaolin (Example 5) (10) Titanium oxide-containing 2.5 oxide-treated red iron oxide (Example 3) treated with isostearic acid (11) Silicone-treated yellow iron oxide 2.0 (12) Silicone-treated black iron oxide 0.1 (13) Polyethylene powder 10.0 Law: (6) were mixed pigment component to (13), grinding through grinder. This is moved to a high speed blender, (1) to (5) are mixed and added, and they are mixed uniformly. This is processed with a crusher,
After adjusting the particle size through a sieve, it is filled in a gold plate and compression molded.

A usage test was conducted on Examples 9 to 17 of the present invention. At that time, in each Example, Comparative Examples 1 to 9 were prepared by substituting the surface-treated powders according to Examples 1 to 8 of the present invention with the silicone-treated powders, and the tests were conducted at the same time. It was Use test is from 20s to 5s
Twenty female panelists in their 0's were used as one group, and each group was allowed to use each of the Examples and Comparative Examples for 2 weeks in the blind. After the use test, sensory evaluation was performed on adhesion of cosmetics, adhesion, transparency, UV protection effect, finish and makeup retention, and the evaluation results were scored according to the following evaluation criteria to calculate the average value of 20 people. The results are shown in Table 3.

[With cosmetics] Good 5 points Good 4 points Normally 3 points Two bad points 1 bad point

[Cohesion of cosmetics] There are 5 points There are 4 points Normally 3 points 2 points Not 1 point

[Transparency] There are 5 points There are 4 points 3 points that can not be said 2 points Not 1 point

[UV protection effect] 5 points high 4 points which are slightly high Normally 3 points 2 points that are a little low 1 point low

[Finishing feeling] 5 points that are natural 4 points that are a little natural 3 points that can not be said 2 points that are a little unnatural One point that is unnatural

[Makeup lasting] Good 5 points Good 4 points Normally 3 points Two bad points 1 bad point

[0062]

[Table 3]

As is clear from Table 3, in the groups used in the examples of the present invention, generally good evaluations were obtained regarding the stickiness of the cosmetic and the feeling of adhesion. In addition, in all cases, almost good transparency was obtained, and a UV protection effect higher than normal was recognized. In particular, in the group using Example 12, a synergistic improvement in the ultraviolet protection effect was observed, and considerably high evaluations were also obtained for Example 14, Example 16 and Example 17. Further, in each case, a natural finish feeling was obtained, and almost good makeup lasting was obtained for water-based and oil-in-water emulsion type cosmetics.

On the other hand, in the comparative example use group, the evaluations of the adhesion of the cosmetics, the close contact feeling, the transparent feeling and the finished feeling were generally lower than those of the corresponding example use group. Further, in the groups using Comparative Examples 1 to 3 and Comparative Example 5, no significant UV protection effect was observed. Furthermore, in each of the groups used in Comparative Examples, the evaluation of the makeup retention was slightly lowered.

That is, Examples 9 to 17 of the present invention.
In regards to the above, the adhesion to the skin and the feeling of adhesion were good, an excellent transparency and a natural finish were obtained, and the makeup lasting was also good. Furthermore, even if it does not contain an inorganic UV blocking agent such as an organic UV absorber or particulate titanium oxide, it has a considerably high UV protection effect, and may be effective in preventing the harmful effects of UV rays on the skin. Was shown. Further, it was shown that the UV protection effect was synergistically improved by the combined use of the UV absorber and the particulate titanium oxide.

Regarding Examples 9 to 17 of the present invention, no change in state was observed when the sample was stored at room temperature for 6 months. In the use test, no panelists showed skin irritation reaction or skin sensitization reaction.

Next, examples of the coating composition according to the present invention will be shown.

[0068]   [Example 18] Light-resistant paint (1) Alkyd resin 20.0 (wt%) (2) Titanium oxide dispersion with isostearic acid 10.0    Coated talc (Example 1) (3) Titanium oxide containing 10.0 reacted with 8-quinolinol 10.0    Film-treated kaolin (Example 5) (4) Butyl acetate 30.0 (5) Cyclohexanone 30.0 Manufacturing method: Mix (1) to (3) with (4) and (5) and dissolve uniformly.

Regarding the above embodiment, JIS standard K540
The light resistance was evaluated according to 0 "General Test Method for Paint". That is, the paint according to Example 18 was applied to one surface of a 150 × 70 × 0.8 mm copper plate and dried to obtain a test piece. This test piece was irradiated with an ultraviolet carbon arc lamp type light resistance tester for 100 hours and then measured with a photoelectric colorimeter. As a result, discoloration was not observed at all even after irradiation with ultraviolet rays for 100 hours.

Next, examples of the resin composition and container according to the present invention will be shown.

Example 19 Light-Resistant Resin Composition (1) Polystyrene 87.5 (wt%) (2) Titanium Oxide-Containing Titanium Oxide Treated with Isostearic Acid 12.5 Film-treated Nylon Powder (Example 2) Production Method: Mixing (1) and (2), twin screw extruder (ZSK-25,
Melt and knead using a WERNER & PFLEIDER company.

Example 20 A light-resistant resin film polypropylene was spread and formed into a film, and then 25% by weight of titanium oxide-containing coating red iron oxide (Example 3) treated with isostearic acid was sprayed as a butyl acetate solution. And coated.

Example 21 Light-Resistant Container Using the light-resistant resin composition according to Example 19 above, a container was obtained by blow molding.

Example 22 Light-Resistant Container A polyvinyl chloride resin container surface was sprayed with 30 wt% of synthetic mica treated with isostearic acid as a dispersion of synthetic mica (Example 4) as an isoparaffin solution. Obtained after processing.

After the containers of Examples 21 and 22 were irradiated with an ultraviolet carbon arc lamp type light resistance tester defined in JIS B7551 for 100 hours,
The tensile strength, bending strength and chemical resistance of each container were measured and compared with the values before UV irradiation. In each example,
No significant decrease in the measured values was observed.

[0076]

As described in detail above, according to the present invention, a surface-treated powder having excellent dispersibility in oily materials and applicable to oily paints, oily or waterproof cosmetics, etc. can be obtained. To obtain a coating composition, a resin composition, and a container which are excellent in usability and transparency, can provide a good finished feeling, and can also obtain a skin composition having an excellent UV protection effect, and also have excellent light resistance. I was able to.

Front page continuation (51) Int.Cl. ⁷ Identification code FI C08K 9/04 C08K 9/04 C08L 101/00 C08L 101/00 C09C 3/08 C09C 3/08 C09D 1/00 C09D 1/00 5/32 5/32 C09K 3/00 104 C09K 3/00 104Z C23C 24/00 C23C 24/00 (56) Reference JP-A-3-70768 (JP, A) JP-A-61-257908 (JP, A) JP 61-293906 (JP, A) JP-A 63-223069 (JP, A) JP-A 6-41456 (JP, A) JP-A 9-100124 (JP, A) JP-A 8-157217 (JP , A) Japanese Patent Laid-Open No. 4-144918 (JP, A) Japanese Patent Laid-Open No. 2-22105 (JP, A) Special Table 3-503045 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) C09C 1/36 A61K 7/00 A61K 7/02 A61K 7/42 C01G 23/053 C08K 9/04 C08L 101/00 C09C 3/08 C09D 1/00 C09D 5/32 C09K 3/00 104 C23C 24 / 00

Claims (12)

(57) [Claims] 1. Hydrolysis by adding one or more organic compounds having an atom having a lone electron pair and / or a polar group in a molecule and water to a titanium alkoxide or an oil solution or dispersion thereof. One or more selected from the transparent oily dispersion of titanium oxide obtained by the above, and a film-forming composition obtained by concentrating the oily dispersion or removing the dispersion medium from the oily dispersion. Accordingly, a surface-treated powder formed by coating the surface, the organic compound is more than
Surface treated powder characterized by being selected from the group below:
Myristic acid, palmitic acid, stearic acid, isooctane
Tanoic acid, isomyristic acid, isopalmitic acid, isos
Theariic acid, hydroxypalmitic acid, hydroxystea
Allic acid and 8-quinolinol. 2. A titanium alkoxide, or an oily solution or dispersion thereof, containing one or more organic compounds having an atom having a lone electron pair and / or a polar group in the molecule, and one hydrolysis inhibitor. Alternatively, a transparent oily dispersion of titanium oxide obtained by hydrolysis by adding two or more kinds and water, and a film forming property obtained by concentrating the oily dispersion or removing a dispersion medium from the oily dispersion. A surface-treated powder obtained by coating the surface with one or more selected from the compositions , wherein the organic compound is selected from the following group.
Surface-treated powder characterized by being selected: myristin
Acid, palmitic acid, stearic acid, isooctanoic acid, a
Somyristic acid, Isopalmitic acid, Isostearin
Acid, hydroxypalmitic acid, hydroxystearic acid
And 8-quinolinol. 3. Hydrolysis of titanium alkoxide or its oily solution or dispersion by adding water and one or more kinds of organic compounds having an atom having a lone electron pair and / or a polar group in the molecule and water. One or more of the transparent titanium oxide oil dispersions obtained by the above, or a film-forming composition formed by concentrating the oil dispersion or removing the dispersion medium from the oil dispersion. The surface-treated powder according to claim 1, characterized in that a step of kneading and drying one or two or more kinds of the compounds dissolved or dispersed in a solvent in a core powder is repeatedly performed. Manufacturing method. 4. Hydrolysis is carried out by adding, to a titanium alkoxide or an oily solution or dispersion thereof, one or more organic compounds having an atom having a lone electron pair and / or a polar group in the molecule and water. The transparent oily dispersion of titanium oxide thus obtained is concentrated, or a film-forming composition obtained by removing the dispersion medium from the oily dispersion, and the dispersion medium is removed from the oily dispersion, and then dried. Or one or two or more selected from lipophilic titanium oxide powders obtained by further firing and powders to be cores are mixed and ground in a ball mill for surface treatment. 1. The method for producing the surface-treated powder according to 1. 5. A titanium alkoxide or an oil-based solution or dispersion thereof, which comprises one or more organic compounds having an atom having a lone electron pair and / or a polar group in the molecule, and one hydrolysis inhibitor. Alternatively, one or more transparent oily dispersions of titanium oxide obtained by hydrolysis with the addition of two or more kinds and water, or concentrating the oily dispersion, or using a dispersion medium from the oily dispersion. One or two or more kinds selected from the film-forming composition removed and dissolved or dispersed in a solvent is kneaded while being sprayed onto a powder serving as a core and then dried, which is repeated. The method for producing the surface-treated powder according to claim 2, wherein 6. A titanium alkoxide or an oil-based solution or dispersion thereof, wherein one or more organic compounds having an atom and / or a polar group having a lone electron pair in the molecule and one hydrolysis inhibitor are used. Alternatively, a film-forming composition obtained by concentrating a transparent oily dispersion of titanium oxide obtained by hydrolysis by adding two or more kinds and water, or removing a dispersion medium from the oily dispersion, and the oily composition One or more selected from lipophilic titanium oxide powders obtained by removing the dispersion medium from the dispersion, and then drying or further firing
The method for producing a surface-treated powder according to claim 2, wherein the powder to be the core is mixed and ground in a ball mill for surface treatment. 7. One or more selected from the surface-treated powders according to claim 1 or 2,
A composition for skin. 8. The surface-treated powder according to claim 1 or 2, containing one or more kinds thereof.
Coating composition. 9. A mixture of one kind or two kinds or more selected from the surface-treated powder according to claim 1 or 2,
Resin composition. 10. A resin composition obtained by coating the surface with one or more selected from the surface-treated powders according to claim 1. 11. A container, which is molded from one or more of the resin compositions according to claim 9 and 10. 12. A container having a surface coated with one or more selected from the surface-treated powders according to claim 1 and claim 2.