JPH10212211A - Cosmetic material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cosmetic material which has excellent effect shielding of ultraviolet ray and shows excellent transparency and good spread with natural finishing on skin. SOLUTION: This cosmetic material comprises flake titanium oxide with the thickness of nanometer level in place of titanium oxide powder with the thickness of micrometer level used in the past, particularly porous titanium oxide consisting of the aggregation of flake titanium oxide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of cosmetics having an excellent ultraviolet shielding effect, excellent transparency, good spread on the skin, and a natural finish.

[0002]

2. Description of the Related Art Titanium oxide has excellent coloring and hiding power,
It is structurally stable and is one of the highly safe white pigments. When the particle diameter is 1 μm or less, an excellent ultraviolet shielding effect and the like are obtained due to the so-called “volume effect” and “surface effect”. For this reason, in the case where titanium oxide is used not only as a white pigment but also to impart an ultraviolet shielding effect to cosmetics and the like, the above-mentioned fine particle titanium oxide is widely blended mainly as an ultraviolet shielding agent.

[0003]

However, fine particle titanium oxide generally blended in cosmetics and the like tends to deteriorate the spread of the cosmetic on the skin, and tends to cause unevenness of the cosmetic. Therefore, the ultraviolet shielding effect may not always be sufficient. In addition, since the fine particle titanium oxide lacks transparency, it is undeniable that when the titanium oxide is exclusively used as a UV-screening agent in cosmetics, it tends to have an unnecessary and unnatural bluish finish.
The problem to be solved by the present invention is to provide a cosmetic containing titanium oxide which has an excellent ultraviolet shielding effect and is excellent in usability.

[0004]

Means for Solving the Problems The present inventor has made intensive studies to solve this problem. As a result, cosmetics containing flaky titanium oxide with a thickness of nanometer level have excellent UV shielding effect, excellent transparency, good spread on the skin, and natural finish. The present invention has been completed.

That is, the present invention provides a cosmetic comprising a flaky titanium oxide having a thickness on the order of nanometers, particularly a porous titanium oxide which is an aggregate of the flaky titanium oxide.

[0006]

Embodiments of the present invention will be described below. A flaky titanium oxide (hereinafter, referred to as flaky titanium oxide) having a thickness of nanometer level or a porous titanium oxide (hereinafter, referred to as titanium oxide) which is an aggregate of the flaky titanium oxide, which is blended in the cosmetic of the present invention. It is called a porous body.
Further, the titanium oxide porous body and the flaky titanium oxide may be collectively referred to as a flaky titanium oxide or the like. )
It can be manufactured as follows.

Production of flaky titanium oxide: Flaky titanium oxide has a composition of H _X Ti
_A layered titanic acid powder which is _{2-X /} 4O ₄ .nH ₂ O (x = 0.60 to 0.75, n is a number exceeding 0 and less than 2) is produced, and then this powder is treated with an amine aqueous solution or the like. And a dispersion in the form of a titania sol which is dispersed and dispersed.

Here, as the layered titanate as a raw material, for example, cesium titanate having an orthorhombic layered structure [Cs _x Ti _{2-x / 4} O ₄ .nH ₂ O (x = 0.60-0.6)
0.75, n is a number exceeding 0 and less than 2)], cesium pentatitanate having a single crystal layered structure [Cs ₂ Ti ₅ O ₁₁
MH ₂ O (m is a number greater than or equal to 0)], potassium tetratitanate (K ₂ Ti ₄ O ₉ ), sodium trititanate (Na ₂ T
i ₃ O ₇ ), potassium dititanate (K ₂ Ti ₂ O ₅ ) and the like. Among them, it is an object to select cesium titanate having an orthorhombic layer structure as a layered titanate. Is preferred because it is easy to peel off. These layered titanates can be obtained, for example, by mixing titanium oxide and an alkali metal carbonate in a stoichiometric ratio and firing the mixture at 700 ° C. or higher.

The acid treatment step is a step for forming interlayer titanate powder by replacing interlayer ions of the layer titanate with hydrogen ions. Specifically, this acid treatment is carried out by repeating the operation of bringing the layered titanate into contact with an aqueous acid solution and stirring.

The type of acid used in the acid treatment step is not particularly limited, and hydrochloric acid, sulfuric acid, nitric acid, oxalic acid, acetic acid, and the like can be used. The acid aqueous solution generally has an acid concentration of 0.1N or more and 12N or less, and preferably 0.5N or more and 3N or less is a preferable acid concentration. (It is desired that the acid concentration be less than 0.1N. It takes a long time until the layered titanic acid powder is formed, which is not preferable. If it exceeds 12 normal, it is not preferable because part of the titanate is dissolved and handling of the acid becomes difficult.) Solid-liquid ratio is 10
There is no particular upper limit as long as it is not less than cm ³ / g, but it is actually about 50
cm ³ / g or less. The solid-liquid ratio is 10 cm ³ /
When the amount is less than g, the amount of acid decreases, and it takes a long time for a desired reaction to proceed. The desired acid treatment can be performed with a contact time of usually about 24 hours and a repetition number of steps of three or more.

Next, a titania sol in which titanium oxide crystals are separated and dispersed to a thickness of nanometer level by mixing and stirring with an aqueous amine solution is added to the layered titanic acid powder obtained in this acid treatment step. By preparing
The desired flaky titanium oxide can be obtained.

The aqueous amine solution which is brought into contact with the titanium oxide crystal for the purpose of peeling and dispersing the titanium oxide crystal is three-dimensionally bulky, has a high peeling ability of the titanium oxide crystal, and is assured of such a safety that it can be incorporated into cosmetics. It is not particularly limited as long as it exists. Specifically, for example, tetrabutylammonium hydroxide, propylamine, ethylamine, ethanolamine, propanolamine, tetramethylammonium hydroxide, tetraethylammonium hydroxide,
An aqueous solution such as tetrapropylammonium hydroxide can be exemplified. Among these, an aqueous solution of tetrabutylammonium hydroxide is a preferred amine aqueous solution particularly for selecting a titanium oxide crystal having high peeling ability.
The concentration of this amine aqueous solution is generally 0.01 M or more,
It is preferable that the concentration is 1 M or less and the concentration is around 0.02 M because the titanium oxide crystal has the highest peeling ability.

Further, in order to promote the separation of the titanium oxide crystal, physical means such as mechanical shaking by vigorous shaking, stirring, ultrasonic waves, or mechanofusion can be used. In this way, a desired flaky titanium oxide can be obtained as a titania sol in which each host layer (thickness is 1 nm or less), which is the minimum basic unit of the crystal structure of the layered titanic acid, is dispersed in water. . The amount of titanium oxide in the sol obtained under the conditions under which the above-mentioned titanium oxide crystal was separated under the best conditions was about 0.5% by weight with respect to the whole sol. Equivalent ratio is 1
It is about.

Production of titanium oxide porous material: The titania sol obtained above is dried by drying the titania sol obtained above.
Further, it can be obtained by firing.

As a drying means of the titania sol, a commonly known drying means such as vacuum freeze-drying can be used. In particular, the gel obtained by temporarily freezing the titania sol and then freeze-drying the vacuum is simply dried. It is fluffy and lighter than the ones, and has a particularly porous appearance.
The titanate sheet once peeled to the single layer level is 10-2
This is a kind of interlayer compound in which about 0 sheets are aggregated and amine ions and water are included in the lamination gap. ). This feature is maintained in the titanium oxide porous body finally produced, and when such a titanium oxide porous body is incorporated into the cosmetic of the present invention, it is excellent in spreadability on the skin and gives a transparent finish. It is preferable in that it can be used.

The gel obtained by applying the drying means is calcined to obtain a desired porous titanium oxide. It is necessary to carry out the baking treatment at a temperature of at least 400 ° C. (a heating process at around 100 to 400 ° C. is a weight reduction process for removing water and subsequently amine). The firing temperature is very important for determining the crystal structure of the obtained porous titanium oxide.

That is, when the sintering temperature is around 400 ° C., the layered structure is substantially collapsed to obtain an amorphous crystal, and when the sintering temperature is 400 ° C. or more and less than 800 ° C., it is almost crystallized as anatase.
When the temperature is 800 ° C. or higher, the temperature generally shifts to rutile. Further, as the firing temperature increases, the mesopores of the obtained titanium oxide porous body are crushed and the proportion of macropores increases.

As the titanium oxide porous material to be incorporated into the cosmetic of the present invention, these titanium oxide porous materials can be appropriately selected and used according to the specific use and form of the cosmetic to be incorporated. The titanium oxide porous material thus obtained is a flake fine particle having a thickness of 20 to 30 nm and a width of μm unit, has a large specific area of approximately 40 to 110 m ² / g, and has a fine pore size. It has a unique surface property with mesopores to macropores developed over a wide range of 2 to 100 nm. By crushing the titanium oxide porous body by a commonly known means, a titanium oxide porous body having a desired size can be easily prepared.

If necessary, the flaky titanium oxide obtained above is added to a fatty acid soap such as aluminum stearate and zinc myristate; a wax such as candelilla wax and carnauba wax; and a silicone oil such as methylpolysiloxane. A hydrophobic treatment can be performed by a known method to impart water repellency. The flaky titanium oxide in the present invention also includes the flaky titanium oxide subjected to such a hydrophobic treatment.

The amount of the flaky titanium oxide or the like in the cosmetic of the present invention should be appropriately mixed according to the specific form of the cosmetic, etc., but is generally 0.1% by weight based on the cosmetic. As described above, the content is 60% by weight or less, preferably 0.5% by weight or more and 30% by weight or less. 0.1 for cosmetics
When the amount is less than 60% by weight, it is difficult to impart the expected ultraviolet shielding effect to the cosmetic.
It is difficult to expect the effect corresponding to the amount to be blended even if the amount exceeds the range, which is not preferable.

In this way, by blending the above-mentioned flaky titanium oxide or the like into the cosmetic, it has a surprisingly excellent ultraviolet shielding effect, is excellent in transparency, and has good spreadability on the skin. A natural finish is provided.

As long as only the intended effect is imparted to the cosmetic of the present invention, it is not necessary to mix other components in the cosmetic of the present invention. In order to exert a known function, other components can be incorporated into the cosmetic of the present invention within a range that does not impair the above-mentioned expected effects.

For example, petrolatum, lanolin, ceresin,
Solid or semi-solid oils such as carnauba wax, candelilla wax, higher fatty acids and higher alcohols; liquid oils such as squalane, liquid paraffin, ester oil and triglyceride; oils such as silicone oil; sodium hyaluronate;
Moisturizers such as glycerin, surfactants such as cationic surfactants and nonionic surfactants, pigments, preservatives, fragrances,
An activator, an ultraviolet shielding agent other than flaky titanium oxide and the like can be appropriately compounded.

The cosmetic of the present invention can be in the form of powder, cake, pencil, stick, ointment, liquid, and the like. For example, facial cosmetics such as lotions, emulsions, and creams can be used. Makeup cosmetics such as foundation, lipstick, eye shadow, blusher, eyeliner, nail enamel, mascara, etc., and hair cosmetics such as hair treatment, hair liquid, set lotion, etc. can be applied to the cosmetic of the present invention.

The flaky titanium oxide in which the host layer, which is the minimum basic unit of the crystal structure of the layered titanic acid, obtained as the titania sol described above, is dispersed in water, is in the titania sol with the aqueous amine solution interposed. Exists specifically only in Therefore, the form of the cosmetic of the present invention in which the flaky titanium oxide can be blended is limited to a form of an aqueous solution containing at least a concentration of an amine capable of dispersing the flaky titanium oxide, such as a lotion or an emulsion. You.

[0026]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to Examples and the like, but the technical scope of the present invention should not be interpreted as being limited by these Examples. [Production Example] Production of flaky titanium oxide, etc. Cesium carbonate (Cs ₂ CO ₃ ) and titanium dioxide (Ti
O ₂ ) was mixed at a ratio of 1: 5.3 (molar ratio) and calcined at 800 ° C. for 2 days to synthesize orthorhombic cesium titanate (Cs _0.70 Ti _1.825 O ₄ ). This orthorhombic cesium titanate powder was stirred in 1N hydrochloric acid for 3 days, then filtered and air-dried to form a layered titanic acid [H _0.1 Ti _1.825 O
₄ · nH ₂ O (n is a number of 0 or more)]. 0.5 g of the layered titanic acid powder was added to 100 cm ^{3 of an} aqueous solution of tetrabutylammonium hydroxide (concentration: 0.1 moldm ^-3 ), and the mixture was shaken at about 150 rpm with a shaker to produce a titania sol.

Next, this titania sol was placed in a refrigerator (−3).
After freezing at 0 ° C.), the frozen product was subjected to vacuum freeze-drying. As a result, a flocculent gel is formed, and the gel is subjected to a baking treatment (a treatment at 700 ° C. for 3.5 hours or a treatment at 850 ° C. for 3.5 hours).
Time treatment). As a result, a flaky titanium oxide (porous body) having desired anatase type (700 ° C. treatment) or rutile type (850 ° C. treatment) crystals was obtained. The surface of these flaky titanium oxides was subjected to a silicone treatment to obtain flaky titanium oxides having improved water repellency.

Hereinafter, examples of formulation of the cosmetic of the present invention containing the flaky titanium oxide produced in the above Production Examples will be described. In addition, the following compounding amounts are all% by weight with respect to cosmetics. [Example 1] Emulsion foundation weight% 1) ion-exchanged water 60.9 2) dispersant 0.1 3) dipropylene glycol 5.0 4) suitable amount of preservative 5) polyoxyethylene-modified dimethylpolysiloxane 4.0 6) Decamethylcyclopentasiloxane 12.0 7) Liquid paraffin 5.0 8) Flaky titanium oxide (anatase) 9.0 9) Sericite 5.36 10) Kaolin 4.0 11) Titanium dioxide 0.32 12 ) Yellow iron oxide 0.80 13) Red iron oxide 0.36 14) Black iron oxide 0.16 15) Perfume

<Production method> After the components 1) to 4) were heated and stirred at 70 ° C, a flaky titanium oxide powder 8) and the components 9) to 14) were added to carry out a dispersion treatment. This dispersed product is previously
The mixture was added to the components 5) to 7) heated to 0 ° C. and emulsified and dispersed. Thereafter, the emulsified dispersion was stirred and cooled to room temperature, and the component 15) was added thereto to obtain an intended emulsified foundation.

[Example 2] Powdery foundation weight% 1) Talc 15.0 2) Mica 35.0 3) Kaolin 5.0 4) Flaky titanium oxide (anatase) 15.0 5) Titanium dioxide 5.0 6 7.) Titanium mica 3.0 7) Zinc stearate 1.0 8) Nylon powder 5.0 9) Red iron oxide 1.0 10) Yellow iron oxide 3.0 11) Black iron oxide 0.2 12) Squalane 6. 0 13) Lanolin acetate 1.0 14) Octyldodecyl myristate 2.0 15) Neopentyl glycol diisooctanoate 2.0 16) Sorbitan monooleate 0.5 17) Preservatives qs 18) Antioxidants qs 19) Appropriate amount of fragrance

<Preparation method> Components 1) and 9) to 11) are mixed with a Henschel mixer, and components 2) to 8) are added to the mixture and mixed well. The mixture dissolved by heating was added and mixed. Thereafter, the mixture was pulverized with a 5HP pulperizer (manufactured by Hosokawa Micron),
This was molded in a middle plate to obtain the desired powdery foundation.

[Example 3] Oily stick foundation weight% 1) Flaky titanium oxide (rutile) 13.0 2) Titanium oxide 7.0 3) Kaolin 20.0 4) Talc 2.0 5) Mica 3.0 6) Red iron oxide 1.0 7) Yellow iron oxide 3.0 8) Black iron oxide 0.2 9) Solid paraffin 3.0 10) Microcrystalline wax 7.0 11) Vaseline 15.0 12) Dimethyl polysiloxane 3.0 13) Squalane 5.0 14) Isopropyl palmitate 17.0 15) Antioxidant qs 16) Fragrance qs

<Production Method> Components 9) to 15) were dissolved at 85 ° C., and components 1) to 8) were added thereto, mixed with a disper, and then dispersed with a colloid mill. Ingredient 1 in this dispersion
6) was added, and after deaeration, the mixture was poured into a container at 70 ° C. and cooled to obtain a target oily stick foundation.

[Example 4] Dual-use foundation weight% 1) Silicone-treated talc 19.0 2) Silicone-treated mica 40.0 3) Silicone-treated titanium dioxide 5.0 4) Silicone-treated thin layered titanium oxide (anatase) 15. 0 5) Silicone treated red iron oxide 1.0 6) Silicone treated yellow iron oxide 3.0 7) Silicone treated black iron oxide 0.2 8) Zinc stearate 0.1 9) Nylon powder 2.0 10) Squalane 4.0 11) Solid paraffin 0.5 12) Dimethyl polysiloxane 4.0 13) Glycerin triisooctanoate 5.0 14) Octyl methoxycinnamate 1.0 15) Preservative suitable amount 16) Antioxidant suitable amount 17) Fragrance suitable amount

<Production method> After components 1) to 9) were mixed with a Henschel mixer, 10) to 17) obtained by heating and dissolving at 70 ° C were added and mixed. Thereafter, the mixture was pulverized with a 5HP pulperizer (manufactured by Hosokawa Micron), and molded with a middle plate to obtain a target dual-use foundation.

[Example 5] Oil type lipstick weight% 1) Thin layered titanium oxide (rutile) 5.0 2) Red 201 No. 0.6 3) Red No. 202 1.0 4) Red No. 203 0.25 9) Candelilla wax 9.0 6) Solid paraffin 8.0 7) Beeswax 5.0 8) Carnauba wax 5.0 9) Lanolin 11.0 10) Castor oil 25.0 11) Cetyl 2-ethylhexanoate 20.0 12) Isopropyl myristate 10.0 10.0 13) Antioxidant appropriate amount 14) Fragrance appropriate amount

<Production method> Components 1) to 3) were added to a part of 10), and treated with a roller (pigment part). Meanwhile, 4)
Was dissolved in a part of 10) (dye part). Next, 5) to 14)
Was heated and dissolved at 90 ° C., and the pigment part and the dye part were added thereto and uniformly dispersed with a homomixer. After dispersion, the mixture was filled in a predetermined container to obtain a target oily lipstick.

Example 6 Sunscreen Agent Weight% 1) Thin Layered Titanium Oxide (Anatase) 5.0 2) Ion Exchanged Water 54.95 3) 1,3-butylene Glycol 7.0 4) Disodium Edetate 0.05 5) Triethanolamine 1.0 6) Oxybenzone 2.0 7) Octyl paramethoxycinnamate 5.0 8) Squalane 10.0 9) Vaseline 5.0 10) Stearyl alcohol 3.0 11) Stearin Acid 3.0 12) Glyceryl monostearate 3.0 13) Ethyl polyacrylate 1.0 14) Antioxidant qs 15) Preservative qs 16) Fragrance qs

<Production Method> Components 2) to 5) were heated to 70 ° C. and dissolved. 1) was added to the mixture and dispersed sufficiently.
The solution obtained by heating and dissolving 6) to 16) was added thereto, and the mixture was emulsified and dispersed using a homogenizer. Thereafter, the mixture was stirred and cooled to room temperature to obtain a desired sunscreen agent.

[Example 7] W / O type sunscreen agent wt% 1) ion-exchanged water 38.3 2) 1,3-butylene glycol 5.0 3) siliconized thin layered titanium oxide (rutile) 3.0 4) Octyl paramethoxycinnamate 5.0 5) Oxybenzone 3.0 6) 4-tert-4'-Methoxydibenzoylmethane 1.0 7) Squalane 40.0 8) Glycerin diisostearate 3.0 9) Organic Modified montmorillonite 1.5 10) Preservative qs 11) Flavor qs

<Production Method> Components 4) to 11) were heated to 70 ° C. to dissolve them. 3) was added to the mixture and dispersed sufficiently. To this dispersion was added a solution obtained by heating and dissolving 1) and 2), and the mixture was emulsified and dispersed using a homogenizer. afterwards,
The mixture was stirred and cooled to room temperature to obtain a desired W / O type sunscreen agent.

Example 8 Blusher Weight% 1) Kaolin 19.0 2) Thin Layered Titanium Oxide (Anatase) 5.0 3) Bengala 0.3 4) Red No. 202 0.5 5) Celesin 15.0 6) Vaseline 20.0 7) Liquid paraffin 25.0 8) Isopropyl myristate 15.0 9) Antioxidant qs 10) Fragrance qs

<Production method> Components 1) to 4) were added to part of 7), and the mixture was treated with a roller (pigment part). Meanwhile, 4)
Was dissolved in a part of 10) (dye part). 5) to 10) are 90
The mixture was heated and melted at ℃, the pigment portion was added thereto, and the mixture was uniformly dispersed with a homomixer. After dispersion, this was filled in a predetermined container to obtain a target blusher.

[Comparative Examples 1 to 8] In the cosmetics of Examples 1 to 8, fine powder of titanium oxide obtained by vapor-phase oxidation of titanium chloride instead of thin layer titanium oxide (P-25: Degussa Co., Ltd.) Comparative Examples 1 to 8
And This titanium oxide fine powder is a mixed type of titanium oxide fine powder of anatase and rutile.

Test Example 1 Examination of Ultraviolet Scattering Effect and Transparency The cosmetics obtained in the above Examples 1 to 6 and Comparative Examples 1 to 6 were subjected to ultraviolet (300 nm) absorbance and visible portions (420 nm and 550 nm). Table 1 shows the reflectivity of ()).
The absorbance of Example 6 and Comparative Example 6 was 5 μm on a transparent quartz plate.
m, and measured with a spectrophotometer.
And Comparative Examples 1 to 5 were prepared using a sample 0.02 on a transparent quartz plate.
g was applied almost uniformly over an area of 4 × 5 cm and measured with a spectrophotometer.

With respect to the reflectance, Example 6 and Comparative Example 6 were left as they were, while Example 5 and Comparative Example 5 were heated and melted, and applied to black opacity test paper to a thickness of 0.35 mm. ,
In Examples 1 to 4 and Comparative Examples 1 to 4, 0.7 g of a sample was applied to a black opacity test paper so as to be almost uniform over an area of 4 × 5 cm, and measured with a colorimeter.

[0047]

[Table 1] From the results, it was clarified that the cosmetic of this example had good ultraviolet absorbing effect (see absorbance) and transparency (see reflectance).

[Test Example 2] Actual use test on the spread of the cosmetics For the cosmetics of Examples 6 and 7 and Comparative Examples 6 and 7, a panel of 24 persons each of 6 persons from each of the following groups A to D was prepared. A practical use test on the growth of cosmetics was carried out. Group A: Group using the cosmetic of Example 6 Group B: Group using the cosmetic of Example 7 Group C: Group using the cosmetic of Comparative Example 6 Group D: Using the cosmetic of Comparative Example 7 Group

Evaluation of the results (shown by the average score of each group)
1 ) Very slow growth. 2: Slow growth. 3: Neither can be said. 4: Good growth. 5: Very smooth.

As a result, the group A
The score was 4.0 , and the score of Group B was 3.8 . On the other hand, the rating of the group C regarding the cosmetics of the comparative example was 3.3 , D
The group score was 2.8 . That is, it was clarified that the cosmetics of the examples in which the thin layered titanium oxide was blended were clearly superior to the cosmetics of the comparative example.

Test Example 3 Actual Use Test on Finish of Cosmetic The cosmetics of Example 8 and Comparative Example 8 were prepared using a panel of a total of 12 persons, each of the following groups E and F, each comprising 6 persons. An actual use test on the finish was performed. Group E: group using the cosmetic of Example 8 Group F: group using the cosmetic of Comparative Example 8

Evaluation of the results (shown by the average score of each group)
1 ) Very pale and unnatural. 2: pale and unnatural. 3: Neither can be said. 4: Nature. 5: Very natural.

As a result, the cosmetic of Example E
The rating was 3.8 . On the other hand, the score of Group F regarding the cosmetics of Comparative Example was 2.8 . That is, it was clear that the cosmetics of the examples in which the thin layer titanium oxide was blended had a more natural finish than the cosmetics of the comparative example.

[0054]

Industrial Applicability According to the present invention, there is provided a cosmetic composition having an excellent ultraviolet shielding effect, excellent transparency, good spread on the skin and a natural finish.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI A61K 7/031 A61K 7/031 7/035 7/035 (72) Inventor Shuji Nishihama 1050 Nippacho, Kohoku-ku, Yokohama, Kanagawa Prefecture In Shiseido Daiichi Research Center Co., Ltd. (72) Inventor Hiroshi Fukui 1050 Nippa-cho, Kohoku-ku, Yokohama, Kanagawa Prefecture In Shiseido Daiichi Research Center

Claims (2)

[Claims] 1. A cosmetic comprising flaky titanium oxide having a thickness on the order of nanometers. 2. A cosmetic comprising a flaky titanium oxide porous body, which is an aggregate of flaky titanium oxide having a thickness on the order of nanometers.