JPH0930933A - Cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cosmetic which has excellent ultraviolet rays-screening effect, no skin-irritating side effect, and shows good dispersion, light resistance, good application feeling and good finish feeling. SOLUTION: This cosmetic contains fine particles of multiple oxides of Ti, Fe and Si and/or fine particles coated with multiple oxide of Ti, Fe and Si. In the multiple oxides, the Fe component is 0.05-10wt.%, preferably 0.2-5wt.% calculated as Fe2 O3 , the Si component is 1-20wt.%, preferably 5-15wt.% calculated as SiO2 where the total amount of them is <=30wt.%, particularly <=20wt.%. These components are used to give a cosmetic such as toilet lotion in the form of powder, cake, pencil, stick, solution, emulsion, cream, additionally cosmetic such as foundation, cream, emulsion, eye shadow, nail enamel, eye liner, rouge, pack, shampoo, rinse and the like. This cosmetic can particularly screen the ultraviolet rays of 320-400nm wavelength which deposits melanin pigment in the skin.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD OF THE INVENTION The present invention relates to a cosmetic, and more particularly to a cosmetic having an excellent ultraviolet shielding effect.

[0002]

BACKGROUND OF THE INVENTION Recently, sunscreen cosmetics capable of preventing sunburn due to ultraviolet rays have been sold. This sunscreen cosmetic contains an ultraviolet ray blocking agent such as an ultraviolet ray absorbing agent, and shields the ultraviolet rays radiated on the skin by absorbing the ultraviolet ray with an ultraviolet ray blocking agent, and erythema and blisters are generated on the skin by the excessive amount of ultraviolet ray irradiation. At the same time, it has the effect of suppressing the formation of melanin in the pigment cells of the skin, thereby preventing the pigment from depositing on the skin.

UV absorbers for sunscreen cosmetics include quinine salts such as quinine hydrochloride and quinine sulfate,
Paraaminobenzoic acid derivatives such as ethyl paraaminobenzoate and isopropyl paraaminobenzoate, salicylic acid derivatives such as phenyl salicylate, cinnamic acid derivatives such as benzyl cinnamate and homomenthylcinnamic acid, and acetanilide are known.

However, as the content of these ultraviolet absorbers in the cosmetics increases, the ultraviolet absorbers do not dissolve uniformly in the cosmetics, irritate the skin, or deteriorate when they absorb ultraviolet rays. As a result, there have been problems such as a decrease in ultraviolet absorption rate and coloring.

Inorganic compounds such as titanium oxide, cerium oxide, zinc oxide and iron oxide are known as ultraviolet ray shielding agents for sunscreen cosmetics other than the above. These UV-screening agents do not deteriorate at the time of UV-ray absorption, penetrate into the skin, are not absorbed into the body, and do not irritate the skin. It is often used as an ultraviolet shielding agent for cosmetics.

By the way, of the ultraviolet rays contained in the sun rays, about 280 to 320 nm (UV-B region), especially 29
Ultraviolet rays having a wavelength of 7.6 nm are called Dorno rays and have an action of causing erythema and burns, which are acute inflammation, on the skin. The erythema among them disappears after a certain period of time, but after that, it has the action of depositing melanin pigment on the skin, which causes sunburn.

Further, it is known that ultraviolet rays having a wavelength of about 320 to 400 nm (UV-A region), particularly 340 to 380 nm have an action of oxidizing reduced melanin of the epidermis to deposit melanin pigment on the skin. There is.

[0008] Conventionally, attention has been paid to the effect of ultraviolet rays in the UV-B region on the skin, and many ultraviolet ray shielding agents which exhibit an excellent effect of shielding ultraviolet rays in this region are known. However, recently, the recognition of the necessity of preventing the deposition of the melanin pigment on the skin by the ultraviolet rays in the UV-A region has been increased, and a cosmetic which can effectively shield the ultraviolet rays in the total ultraviolet region has been desired.

Titanium oxide, which has been used as a UV-screening agent, has a problem in that it has an excellent UV-screening effect in the UV-B range, but is inferior in the UV-A range.

Although iron oxide is excellent in the effect of blocking ultraviolet rays in the UV-A region, it has a problem that it is colored yellow or red when incorporated into cosmetics. On the other hand, although zinc oxide has the ability to shield the ultraviolet rays in the UV-A region and the UV-B region, it has a problem that its ability is low.

[0011]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above circumstances, and is excellent in the ultraviolet ray shielding effect in the UV-B region and also in the UV-A region, and it stimulates the skin. It is an object of the present invention to provide a cosmetic composition which has no side effects, shows a stable ultraviolet ray shielding effect for a long period of time, is excellent in dispersibility, and has an excellent feel during use.

[0012]

SUMMARY OF THE INVENTION A cosmetic material according to the present invention is a composite oxide of Ti, Fe and Si, in which Fe is 0.05 to 10% by weight in terms of Fe ₂ O ₃ and Si is in terms of SiO ₂ . 1
To 20% by weight of complex oxide and /
Alternatively, it is characterized by containing fine particles coated with the complex oxide.

[0013]

DETAILED DESCRIPTION OF THE INVENTION The cosmetic material according to the present invention will be described in more detail below. The cosmetic according to the present invention is
It contains fine particles composed of a complex oxide of i, Fe and Si and / or fine particles coated with a complex oxide of Ti, Fe and Si.

The main component of the above composite oxide is titanium oxide, and the titanium oxide in this composite oxide is anatase type titanium oxide, rutile type titanium oxide, amorphous titanium oxide, or a mixture of two or more thereof. May be.

In the complex oxide used in the present invention, F
The e component is contained in the range of 0.05 to 10% by weight, preferably 0.2 to 5% by weight in terms of Fe ₂ O ₃ , and at the same time the Si component is 1 to 20% by weight in terms of SiO ₂ , preferably It is contained in the range of 5 to 15% by weight.

In the present invention, the total amount of these Fe and Si in terms of oxides is preferably 30% by weight or less, more preferably 20% by weight or less. The composite oxide having the above properties and composition can be obtained by the following method. a) A predetermined amount of Fe compound and S in the titanium oxide fine particles
A method of uniformly mixing the i compound, for example, by mixing, and then firing the titanium oxide fine particles mixed with the Fe compound and the Si compound, b) described in JP-A-63-229139. Fe and S according to the “method for producing titanium oxide sol”
A method of preparing a titanium oxide sol containing i, and drying / calcining the obtained titanium oxide sol.

In any of the above methods, the firing temperature is usually 800 ° C. or higher, preferably 1000 to 130.
0 ° C. Even when the composite oxide used in the present invention is manufactured through such a high-temperature firing process, the titanium oxide contained as a main component in the manufactured composite oxide is usually transformed into rutile-type titanium oxide. However, it retains the anatase crystal structure.

Here, Fe and Si are prepared by the method of b) above.
The following is a more detailed description of the case of preparing a titanium oxide-based composite oxide sol containing a. First,
A mixed gel or sol of hydrated titanium oxide and hydrated iron oxide, or a coprecipitated gel or sol thereof is prepared.

The mixed gel is, for example, titanium chloride,
It is obtained by mixing a hydrated titanium oxide gel and a hydrated iron oxide gel obtained by neutralizing and hydrolyzing an aqueous solution of a titanium salt such as titanyl sulfate and an aqueous solution of an iron salt such as iron chloride. Also, prepare a hydrated titanium oxide gel in advance,
The mixed gel can also be obtained by adding an aqueous solution of an iron salt to this and neutralizing hydrolysis.

The coprecipitated gel of hydrated titanium oxide and hydrated iron oxide can be obtained by neutralizing and hydrolyzing a mixed aqueous solution of titanium salt and iron salt. Moreover, a sol can be obtained by peptizing these mixed gels and coprecipitated gels with an acid. The above-mentioned mixed gel or sol, or coprecipitated gel or sol may be prepared by a conventionally known method, for example, a method of hydrolyzing titanium and iron alkoxides, instead of the above method. In the present specification, "hydrated titanium oxide" and "hydrated iron oxide" are generic terms including titanium oxide hydrate and titanium hydroxide, and iron oxide hydrate and iron hydroxide, respectively.

Next, hydrogen peroxide is added to the above-mentioned mixed gel or sol or coprecipitated gel or sol to dissolve hydrated titanium oxide and hydrated iron oxide to prepare a uniform aqueous solution thereof. The amount of hydrogen peroxide added to the mixed gel or sol or the coprecipitated gel or sol is H ₂ O ₂ /
The (TiO ₂ + Fe ₂ O ₃ ) (weight ratio) is preferably 1.5 or more. When hydrogen peroxide is added to the mixed gel or sol or the coprecipitated gel or sol in such an amount, the hydrated titanium oxide and the hydrated iron oxide can be completely dissolved. At this time, if the total concentration of hydrated titanium oxide and hydrated iron oxide in the aqueous solution is too high, it takes a long time to dissolve them, and further undissolved substances precipitate or the aqueous solution becomes too viscous. There are cases. Therefore,
The total concentration of hydrated titanium oxide and hydrated iron oxide in the aqueous solution is preferably about 6% by weight or less, and more preferably about 4% by weight or less in terms of (TiO ₂ + Fe ₂ O ₃ ) conversion concentration.

When a silicon compound such as an alkali silicate, silica gel or silicic acid solution is added to the thus obtained hydrogen peroxide-dissolved aqueous solution and then heated at a temperature of 80 ° C. or higher, Ti, Fe and Si A sol in which fine particles of a complex oxide are dispersed is obtained.

The method for mixing the hydrogen peroxide-dissolved aqueous solution and the silicon compound is not particularly limited, and, for example, a predetermined amount of these aqueous solutions and the silicon compound may be mixed at once at all, or After mixing these aqueous solutions with a part of the silicon compound and heating, the remaining silicon compound may be added as the reaction progresses.

The silicon compound is added to the mixed gel or sol or the coprecipitated gel or sol described above, and then hydrogen peroxide is added to the mixture to dissolve the mixture, and then the mixture is heated at a temperature of 80 ° C. or higher. It is also possible to obtain the desired sol in which fine particles of a composite oxide of Ti, Fe and Si are dispersed, and further to prepare the above-mentioned mixed gel or sol, or the coprecipitated gel or sol described above with the above silicon. Compound is added, to the resulting mixed gel or sol, or coprecipitated gel or sol,
It is also possible to obtain the desired sol in which fine particles of a composite oxide of Ti, Fe and Si are dispersed by adding hydrogen peroxide to dissolve these gels or sols and then heating at a temperature of 80 ° C. or higher. .

Approximately 100 sol obtained as above
After drying at a temperature of ~ 120 ° C or freeze-drying, it is usually 800 ° C or higher, preferably 1,000-1.
By firing at 300 ° C and crushing if necessary,
It is possible to obtain fine particles of complex oxide (hereinafter, referred to as fine particles I) having an excellent ultraviolet shielding effect.

In the present invention, the fine particles I as described above may be used as the ultraviolet shielding agent, but instead of the fine particles I,
Alternatively, in addition to the fine particles I, fine particles coated with the above complex oxide may be used.

When the fine particles coated with the above complex oxide (hereinafter referred to as fine particles II) are used as the ultraviolet ray shielding agent for the cosmetics according to the present invention, the fine particle base material is
There is no particular limitation as long as it is a particulate base material having properties suitable as a cosmetic ingredient, for example, muscovite, biotite, natural mica such as sericite, synthetic mica, flaky inorganic compounds such as talc, glass flakes, or Examples thereof include fine particles made of silica, alumina, silica-alumina, zirconia, titania, and the like.

For the fine particles II, the total amount of the fine particles II is 1
Ti and Fe having the above composition when the amount is 00 parts by weight
The amount of the complex oxide of Si and Si is preferably 10 to 90 parts by weight.

The method for producing the fine particles II is not particularly limited as long as the fine particles coated with such a complex oxide can be obtained. For example, the hydrolyzable compounds of Ti, Fe and Si are as described above. Examples of such a method include adding to a dispersion of a fine particulate base material and performing hydrolysis.

Fine particles II can also be produced by adding the step of adding a fine particulate substrate to the above method b). For example, when the silicon compound is added to the solution obtained by dissolving the gel or sol of Ti and Fe with hydrogen peroxide by the method of b) above, the particulate base material is added at the same time, or the Ti or Fe After the silicon compound is added to the mixed gel or the coprecipitated gel, the fine particles II are produced by adding the silicon substrate to a solution obtained by dissolving them with hydrogen peroxide.

Further, the fine particle base material and the fine particles of the composite oxide are dispersed in an organic solvent such as water or alcohol, or a mixed solvent of these organic solvents and water, and the fine particles are formed by electrostatic interaction between them. It is also possible to deposit fine particles of complex oxide on the surface of a base material to coat the fine particles, and then to separate fine particles of the complex oxide by filtration, drying and firing to obtain fine particles II.
Is manufactured.

Whether the fine particles I or the fine particles II are used as the ultraviolet ray shielding agent of the cosmetic according to the present invention, or the fine particles II are used together with the fine particles I, these fine particles I The average particle diameter is preferably 15 μm or less from the viewpoint of dispersibility in cosmetics, and is preferably 0.08 μm or less for cosmetics that require transparency.

These fine particles account for 0.1% of the total amount of cosmetics.
If the amount is less than 50% by weight, a sufficient UV shielding effect may not be exhibited, and if the amount exceeds 50% by weight, the cosmetic feel may be impaired.
It is desirable to contain at least 0.1% by weight, preferably 1.0 to 50% by weight of these fine particles.

Further, the cosmetics according to the present invention are usually various components which are mixed in the cosmetics, such as higher aliphatic alcohols, higher fatty acids, ester oils, paraffin oils, oils such as waxes, ethyl alcohol, propylene glycol. , Sorbitol, alcohol such as glycerin,
Moisturizers such as mucopolysaccharides, collagens, PCA salts and lactates, nonionic, cationic, anionic or amphoteric surfactants, gum arabic, xanthan gum,
Polyvinylpyrrolidone, ethyl cellulose, carboxymethyl cellulose, carboxyvinyl polymer, thickeners such as modified or unmodified clay minerals, solvents such as ethyl acetate, acetone, toluene, inorganic face dyes and organic face dyes, BHT, tocopherol, etc. Agent, water, drug, UV absorber, organic acid or inorganic acid salt p
It contains one or more H buffers, chelating agents, preservatives, and fragrances.

Further, the cosmetics according to the present invention may contain one or more kinds of inorganic fillers such as silica, talc, kaolin and mica, and various organic resins, if necessary.

In the production of the cosmetic composition according to the present invention, these components are usually mixed directly, but the composite oxide fine particles as described above, the fine particles coated with the composite oxide as described above, Alternatively, these mixed fine particles may be coated with, for example, an organic resin or a silicon compound, and then mixed with other components.

The cosmetics according to the present invention are used in various forms such as powder, cake, pencil, stick, liquid, emulsion and cream, and lotions, foundations, creams, emulsions, eye shadows, Includes makeup base, nail enamel, eyeliner, mascara, lipstick, pack, shampoo, conditioner, hair cosmetics and the like.

[0038]

EFFECTS OF THE INVENTION The cosmetic composition of the present invention has an excellent UV-shielding effect, and in particular, it can deposit a melanin pigment on the skin.
It can very effectively shield the ultraviolet rays having a wavelength of 400 nm (UV-A region) and effectively protect the skin from the ultraviolet rays.

Further, since the cosmetic composition according to the present invention contains the above-mentioned specific composite oxide as an ultraviolet screening agent, it is more suitable than the conventional cosmetic composition containing an ultraviolet screening agent. It has excellent dispersibility even when the amount of is large, and is also excellent in light resistance, feeling of use, and finish.

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

[0041]

[Production Example 1] 42.7 kg of a titanium chloride aqueous solution of 2% by weight in terms of TiO ₂ and 0.3 kg of an iron chloride aqueous solution of 2% by weight of in terms of Fe ₂ O ₃ were uniformly mixed, and then the pH became 8.5. Ammonia water was added to obtain a slurry. The slurry was filtered, washed, and then dissolved by adding 12 kg of 35% hydrogen peroxide solution.

The solution thus obtained was diluted with pure water so that the concentration of the obtained composite oxide was 1.0% by weight. Then, to this solution was added 3.5 kg of a silicic acid solution having a concentration of 4% by weight of SiO ₂ obtained by dealkalizing an aqueous sodium silicate solution with a cation exchange resin, and the temperature was increased to 200 ° C.
It heated at the temperature of 20 hours and obtained the complex oxide sol.

The obtained composite oxide sol was dried, then baked at a temperature of 1050 ° C. for 5 hours and then pulverized to obtain composite oxide fine particles (Sample A) having an average particle diameter of 0.5 μm.
Table 1 shows the composition and average particle size of the obtained composite oxide fine particles (Sample A).

Further, composite oxide fine particles (Samples B, C and D) shown in Table 1 were obtained in the same manner as Sample A except that the amounts of the titanium chloride aqueous solution, iron oxide aqueous solution and silicic acid solution were changed. .

Further, the complex oxide sol obtained in the step of preparing the sample C is dried and then calcined at a temperature of 850 ° C. for 5 hours, and the calcined product thus obtained is suspended in pure water and subjected to 1 by a sand mill. A time crushing process was performed. The pulverized product was freeze-dried to obtain composite oxide fine particles (Sample E) shown in Table 1.

[0046]

[Table 1]

Each of the composite oxide fine particles of Samples A, B, C, D, and E was applied to the adhesive surface of a commercially available transparent adhesive tape that does not absorb ultraviolet light, using a soft brush in an amount of about 2 mg per 10 cm ² of the adhesive surface. And adhered uniformly to prepare a measurement sample for absorbance.

Wavelength range 280-4 of each measurement sample
Absorbance at 00nm is measured by spectrophotometer (JASCO Corporation)
Ubest-55 type manufactured by the company). The results are shown in Figure 1.
Shown in

[0049]

[Production Example 2] The amount of titanium chloride aqueous solution was changed to 50 kg,
Fine particles (Sample F) consisting only of titanium oxide were obtained in the same manner as in Production Example 1 except that the iron chloride aqueous solution and the silicic acid solution were not added, and the absorbance of the fine particles was measured in the same manner as in Production Example 1.

The results are shown in FIG. The results shown in FIG. 1 show that the composite oxide fine particles (Samples A to E) used in the cosmetics according to the present invention have ultraviolet rays in the entire region, particularly UV-A region, in comparison with titanium oxide fine particles (Sample F). It shows that the UV absorbance is high.

[0051]

Example 1 Using the complex oxide fine particles (Sample A) obtained in Production Example 1, the following composition: Complex oxide fine particles (Sample A) 8.0 wt% pure water 50.0 〃 stearyl alcohol 5. 0 〃 Stearic acid 8.0 〃 Squalane 9.5 〃 Propylene glycol monostearate 3.0 〃 Polyoxyethylene cetyl ether 1.0 〃 Propylene glycol 8.0 〃 Glucerin 4.0 〃 Triethanolamine 1.0 〃 Beeswax 2.0 〃 Fragrance 0.5 〃 Preservative An appropriate amount of cream [sample (a)] was prepared in the following manner. -Preparation Method of Cream [Sample (a)]-Aqueous phase prepared by dispersing composite oxide fine particles (Sample A) in pure water, adding propylene glycol, glycerin and triethanolamine and heating to 70 ° C. Separately, an oil phase portion prepared by separately heating and melting components other than the above at 70 ° C. was added to these parts, and the mixture was uniformly emulsified with a homomixer and then cooled to obtain a cream.

The obtained cream [sample (a)] was applied on a quartz plate to a thickness of 5 μm and dried for 15 minutes, and then the absorbance in the wavelength range of 280 to 400 nm was measured by a spectrophotometer (JASCO Corporation). Manufactured by Ubest-55 type).

The results are shown in FIG. The SPF (Sun Protection Factor) value of this cream [sample (a)] is SPF analyzer (manufactured by Optometric).
As a result of measurement by SPF-290), it was 14.8.

[0054]

Comparative Example 1 A cream [Sample (b)] was prepared in the same manner as in Example 1 except that the titanium oxide particles (Sample F) obtained in Production Example 2 were used instead of the composite oxide particles (Sample A).
Was prepared, and the absorbance of the obtained cream [sample (b)] was measured in the same manner as in Example 1.

The results are shown in FIG.

[0056]

Example 2 Using the complex oxide fine particles (Sample A) obtained in Production Example 1, the following composition: Complex oxide fine particles (Sample A) 7.0 wt% pure water 58.6 〃 triethanolamine 1 １ 〃 Methyl paraoxybenzoate Appropriate amount Carboxymethylcellulose 0.2 〃 Bentonite 0.5 〃 Stearic acid 2.4 〃 Propylene glycol monostearate 2.0 〃 Setostearyl alcohol 0.2 〃 Liquid paraffin 3.0 〃 Liquid lanolin 2 0.0 isopropyl myristate 8.5 propyl paraoxybenzoate Proper amount Titanium oxide pigment 3.5 talc 11.0 fragrance proper amount Coloring pigment 〃 milky liquid foundation [sample (c)] was prepared as follows. -Preparation Method of Emulsion Foundation [Sample (c)]-Composite oxide fine particles (Sample A) were dispersed in pure water, and then carboxymethyl cellulose was dispersed therein. Add bentonite, heat to 70 ° C with good stirring,
The bentonite was fully swollen. To the liquid thus prepared, triethanolamine, methyl paraoxybenzoate, and then a mixed pulverized product of pigment and talc were added, and the mixture was sufficiently dispersed by a colloid mill and heated to 75 ° C.

Separately, a mixture of stearic acid, propylene glycol monostearate, cetostearyl alcohol, liquid paraffin, isopropyl myristate, and propyl paraoxybenzoate was prepared, and the mixture was mixed with this mixture while heating at 80 ° C., Stir well.

The resulting mixture was cooled and the mixture was mixed with 4
A fragrance was added at 5 ° C, and the mixture was cooled to room temperature with stirring to obtain a milky liquid foundation. The absorbance of this emulsion foundation [sample (c)] in the wavelength range of 280 to 400 nm was measured in the same manner as in Example 1.

The results are shown in FIG.

[0060]

[Example 3] An emulsion foundation [Sample (d (d)) was prepared in the same manner as in Example 2 except that the composite oxide particles (Sample D) obtained in Production Example 2 were used in place of the composite oxide particles (Sample A). )] Was prepared and the absorbance of the obtained emulsion was measured.

The results are shown in FIG.

[0062]

[Example 4] The emulsion foundation [Sample (e (e)) was prepared in the same manner as in Example 2 except that the composite oxide particles (Sample E) obtained in Production Example 1 were used in place of the composite oxide particles (Sample A). )] Was prepared and the absorbance of the obtained emulsion was measured.

The results are shown in FIG.

[0064]

[Comparative Example 2] Instead of the composite oxide particles (Sample A), titanium oxide particles [TTO-55 manufactured by Ishihara Sangyo Co., Ltd.
(A)] and zinc oxide fine particles (manufactured by Sakai Chemical Industry Co., Ltd.)
Example 2 except that FINEX-50) was used respectively.
Milk liquid foundations [Samples (f) and (g)] were prepared in the same manner as in [1], and the absorbance of these milk liquid foundations was measured.

The results are shown in FIG. As is clear from the results of FIG. 3, the sample (f) using titanium oxide fine particles as the ultraviolet shielding agent has a sharp decrease in absorbance in the wavelength range of 320 nm or more, and zinc oxide fine particles are used as the ultraviolet shielding agent. The sample (g) has a low overall absorbance in the wavelength range of 280 to 400 nm, but samples (c), (d) and (e) containing the complex oxide fine particles (sample A) (the cosmetic according to the present invention). ) Has a higher absorbance than the samples (f) and (g) in the wavelength range of 320 to 400 nm, and has a high ultraviolet shielding ability in this range.

[0066]

Example 5 (Preparation of flaky fine particles coated with complex oxide) TiO
₂ terms in 2 wt% of the titanium chloride aqueous solution 29.9 kg, F
0.2 kg of a 2 wt% iron chloride aqueous solution in terms of e ₂ O ₃ was uniformly mixed, and then aqueous ammonia was added until the pH reached 8.5 to prepare a slurry. The resulting slurry was filtered and then washed, and then 35% hydrogen peroxide solution 8.4k
g was added and dissolved.

The solution thus obtained was diluted with pure water so that the concentration of the obtained composite oxide was 1.0% by weight. Then, to this solution, 2.5 kg of a silicic acid solution having a concentration of 4% by weight of SiO ₂ obtained by dealkalizing an aqueous sodium silicate solution with a cation exchange resin was added and sufficiently stirred, and then 300 g of sericite was added. In addition, the mixture was heated in an autoclave at a temperature of 200 ° C. for 20 hours to obtain fine particles coated with a composite oxide (Sample G).

This sample G was dried and then dried at 1,000 ° C.
After baking for 5 hours, it was used as a cosmetic ingredient. (Preparation of powder foundation) Using the above sample G, the following composition: sample G 40.0 wt% talc 40.0 〃 titanium oxide pigment 10.0 〃 iron oxide pigment (red) 1.4 〃 〃 (black) 0 2.2 〃 〃 (yellow) 2.9 〃 Isostearyl alcohol 2.0 〃 Lanolin 2.0 〃 Sorbitan fatty acid ester 0.5 〃 Triethanolamine 1.0 〃 Fragrance A suitable amount of powder foundation [sample (h)] It was prepared in the same manner. -Preparation method of powder foundation [sample (h)]-Lanolin, sorbitan fatty acid ester, triethanolamine and perfume are heated and mixed at a temperature of 70 ° C, and other components which have been sufficiently mixed are added to this mixture, and the mixture is thoroughly mixed. Mixed. A powder foundation was obtained by press-molding the obtained mixture.

The feeling of use and ultraviolet ray shielding effect of the obtained powder foundation were evaluated by a panel test. Table 2 shows the results.

[0070]

[Comparative Example 3] A powder foundation [Sample (i)] was prepared in the same manner as in Example 4 except that sericite was used instead of Sample G, and the feeling of use and the ultraviolet shielding effect of this powder foundation were evaluated by a panel test. evaluated.

Table 2 shows the results.

[0072]

[Table 2]

In Table 2, ⊚ indicates extremely good, ∘ indicates good, Δ indicates neither good nor bad, and x indicates inferior. Among the cosmetics according to the present invention, Ti and Fe having a specific composition
The cosmetic containing fine particles coated with a complex oxide of Si and Si (sample h) is slightly inferior in transparency in comparison with the cosmetic containing only sericite (sample i), but has a melanin pigment on the skin. It is also excellent in preventing erythema from occurring.

[Brief description of drawings]

FIG. 1 is a graph showing the absorbance in the wavelength range of 280 to 400 nm of inorganic compound fine particles used as an ultraviolet shielding agent.

FIG. 2 is a graph showing the ultraviolet shielding effect of the cosmetic material according to the present invention.

FIG. 3 is a graph showing the ultraviolet shielding effect of the cosmetics according to the present invention.

Claims (3)

[Claims] 1. A composite oxide of Ti, Fe and Si, wherein Fe is 0.05 to 10 wt% in terms of Fe ₂ O ₃ and Si is 1 to 20 wt% in terms of SiO _2. A cosmetic comprising fine particles of an oxide and / or fine particles coated with the composite oxide. 2. The cosmetic according to claim 1, wherein the total amount of Fe and Si in the composite oxide in terms of oxide is 30% by weight or less. 3. The cosmetic according to claim 1, wherein the content of the fine particles of the complex oxide and / or the fine particles coated with the complex oxide is at least 0.1% by weight.