JPH06192594A - Water-repellent and oil-repellent pigment and powdery cosmetic containing the same - Google Patents

Abstract

(57) [Summary] [Purpose] Excellent water repellency and oil repellency, a transparent feeling,
Provided are a water- and oil-repellent pigment having excellent elongation, feel and adhesion when blended in a cosmetic and applied to the skin, and a powder cosmetic containing the pigment. [Configuration] plate around the inorganic powder coated with 1 to 10 wt% of the inorganic oxide with respect to the plate-shaped inorganic powder, further general formula the surface _{(I) R (CH 2)} n SiX 1 X ₂ X ₃ (I) (In the formula, R represents a perfluoroalkyl group having 1 to 12 carbon atoms, and n is an integer of 1 to 5. X ₁ , X ₂ and X
₃ is an alkoxy group, a halogen group or an alkyl group, and X ₁ , X ₂ and X ₃ may be the same or different. However, when X ₁ , X ₂ and X ₃ are all alkyl groups are excluded), a water- and oil-repellent pigment is formed by treatment with a perfluoroalkylsilane represented by Then, the powder cosmetic is constituted.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a water and oil repellent pigment and a powder cosmetic containing the same. For more details,
The present invention, the periphery of the plate-like inorganic powder is coated with an inorganic oxide,
Furthermore, with a water- and oil-repellent pigment excellent in water repellency and oil repellency obtained by treating the surface with perfluoroalkylsilane,
The present invention relates to a powder cosmetic having a smooth slippery feeling and a close contact feeling by containing the water- and oil-repellent pigment, and having a long-lasting makeup and excellent cosmetic paste.

[0002]

2. Description of the Related Art A number of studies have heretofore been made for making hydrophobic hydrophilic inorganic powders such as mica and talc.
For example, the surface of a hydrophilic inorganic powder is treated with fatty acid, rosin, silicone oil or the like to modify the surface of the inorganic powder to be water repellent.

Further, in order to impart water repellency and oil repellency to the surface of the inorganic powder, the surface of the inorganic powder should be surface-treated with fluoroalkyldi (oxyethyl) amine phosphate ester (Japanese Patent Laid-Open No. 62-62-62). 250074) or treating the surface of silica with a silazane compound having a perfluoroalkyl group (JP-A-2-175759).
Have been proposed.

Further, it has been proposed to treat the surface of an inorganic powder with a perfluoroalkylsilane and mix it with a cosmetic (JP-A-2-218603).

[0005]

However, when a plate-like inorganic powder such as sericite, mica or talc is directly treated with perfluoroalkylsilane, the reactivity between the perfluoroalkylsilane and the plate-like inorganic powder is increased. Therefore, there is a problem that a pigment having excellent oil repellency cannot be obtained although it has water repellency.

Further, when a pigment obtained by directly treating a plate-like inorganic powder with a perfluoroalkylsilane as described above is contained in a cosmetic, not only improvement in sebum resistance cannot be expected, but also a plate-like inorganic powder. There is a problem that the elongation and spread, which are the characteristics peculiar to the body, are deteriorated and the adhesion to the skin is deteriorated, so that a cosmetic having a long-lasting makeup and good makeup paste cannot be obtained.

On the other hand, inorganic oxides such as titanium dioxide and alumina have good reactivity with perfluoroalkylsilane, and when the surface is treated with perfluoroalkylsilane, plate-like inorganic powder such as sericite and mica. As compared with the case where the surface of the body is directly treated with perfluoroalkylsilane, a pigment having excellent oil repellency can be obtained.

Therefore, a plate-like pigment having excellent oil repellency can be obtained by coating the periphery of the plate-like inorganic powder with an inorganic oxide such as titanium dioxide and further treating the surface thereof with perfluoroalkylsilane. It is considered possible.

Further, the above-mentioned JP-A-2-218603 also discloses an example in which the surface of titanium-coated mica in which the periphery of mica is coated with titanium dioxide is treated with perfluoroalkylsilane.

However, the above-mentioned Japanese Patent Laid-Open No. 2-218603 was not made with the recognition that coating the surface of the mica with titanium dioxide during the surface treatment with perfluoroalkylsilane improves the oil repellency. Also, the titanium-coated mica described above is merely given as an example of the many inorganic-organic pigments surface-treated with perfluoroalkylsilanes.

Further, in the above-mentioned JP-A-2-218603, the titanium-coated mica used is made of titanium dioxide in order to strongly develop the pearl luster produced by the interference action of reflected light which is generally commercially available. The amount of coating is increased, so the transparency of the plate-like inorganic powder is impaired, and it is not suitable for cosmetics that are inconvenient when a bright feeling is produced such as sunscreen foundation. However, due to the thick coating layer of titanium dioxide, the elongation and feel of the plate-like inorganic powder have been impaired.

Therefore, according to the present invention, the pearly luster and the glitter feeling due to interference are not substantially exhibited, and the elongation, the feel and the adhesiveness when blended in a cosmetic composition and applied to the skin are maintained. Moreover, it is an object of the present invention to provide a water- and oil-repellent pigment having excellent water repellency and oil repellency, and to provide a powder cosmetic having a makeup lasting property and an excellent makeup paste containing the same.

[0013]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies to achieve the above object, and as a result, coat a plate-like inorganic powder such as sericite with a specific amount of an inorganic oxide around the periphery thereof,
Furthermore, when the surface was treated with perfluoroalkylsilane, it was found that the above object could be easily achieved, and the present invention was completed.

That is, according to the present invention, the periphery of the plate-like inorganic powder is coated with 1 to 10% by weight of the above-mentioned plate-like inorganic powder, and the surface thereof is further represented by the following general formula (I). _{R (CH 2) n SiX 1} X 2 X 3 (I) ( wherein, R represents a perfluoroalkyl group having 1 to 12 carbon atoms, n represents .X _1, X ₂ and an integer from 1 to 5 X
₃ is an alkoxy group, a halogen group or an alkyl group, and X ₁ , X ₂ and X ₃ may be the same or different. However, the present invention relates to a water- and oil-repellent pigment treated with a perfluoroalkylsilane represented by (where X ₁ , X ₂ and X ₃ are all alkyl groups), and a powder cosmetic containing the same.

The present invention will be described in detail below.

In the water- and oil-repellent pigment of the present invention, the inorganic oxide coating the periphery of the plate-like inorganic powder has excellent reactivity with the perfluoroalkylsilane to be treated on the surface thereof, and the resulting pigment is obtained. Is a factor that makes the oil repellent.

The coating amount of this inorganic oxide is within the range of 1 to 10% by weight with respect to the plate-like inorganic powder, and the transparency, elongation, feel and adhesion of the plate-like inorganic powder are possessed. Does not impair goodness.

The perfluoroalkylsilane treated on the surface of the inorganic oxide itself has excellent water repellency and oil repellency, and imparts excellent water repellency and oil repellency to the resulting pigment.

Therefore, the water- and oil-repellent pigment of the present invention is
It has excellent water repellency and oil repellency, and also retains the transparency that plate-like inorganic powder has, and the elongation, feel, and good adhesion when it is mixed with cosmetics and applied to the skin. There is.

In the water-repellent and oil-repellent pigment of the present invention, the plate-like inorganic powder serving as a base material may be any plate-like inorganic powder, and examples of the plate-like inorganic powder include sericite and Preferable examples include natural plate-like inorganic powders such as mica and talc, artificial mica such as tetrafluorosilicon mica and teniolite, and artificial plate-like inorganic powders such as glass flakes.

The plate-like inorganic powder preferably has an average particle size of about 3 to 50 μm.

Any inorganic oxide may be used as long as it has good reactivity with perfluoroalkylsilane. For example, titanium dioxide, aluminum oxide, zirconium oxide, alumina silica, alumina zirconia, etc. are preferably used.

In the present invention, the coating amount of the inorganic oxide is 1 to 10% by weight with respect to the plate-like inorganic powder, but this is for the following reason. That is, when the coating amount of the inorganic oxide is less than 1% by weight with respect to the plate-like inorganic powder, sufficient reactivity with the perfluoroalkylsilane to be treated on the surface cannot be obtained, and thus the oil repellency is reduced. Does not improve. Further, when the coating amount of the inorganic oxide is more than 10% by weight based on the plate-like inorganic powder, the transparent feeling of the plate-like inorganic powder and the elongation and feel when blended in a cosmetic and applied to the skin are obtained. , The good adhesion will be impaired.

As a method for coating the plate-like inorganic powder with this inorganic oxide, for example, water suspension of the plate-like inorganic powder in a liquid of a water-soluble salt of a metal constituting the inorganic oxide such as titanyl sulfate. A method of adding a liquid and performing thermal hydrolysis to deposit an inorganic oxide around the plate-like inorganic powder is adopted.

As mentioned above, the perfluoroalkylsilane used in the present invention has the general formula (I) R (CH ₂ ) _n SiX ₁ X ₂ X ₃ (I) (wherein R represents 1 to 12 carbon atoms). Represents a perfluoroalkyl group, and n is an integer of 1 to 5. X ₁ , X ₂ and X
₃ is an alkoxy group, a halogen group or an alkyl group, and X ₁ , X ₂ and X ₃ may be the same or different. However, the case where all of X ₁ , X ₂ and X ₃ are alkyl groups is excluded).

In the perfluoroalkylsilane represented by the general formula (I), the alkoxy group and the halogen group among the alkoxy groups, halogens and alkyl groups represented by X ₁ , X ₂ and X ₃ are tabular inorganic. It is a factor that develops reactivity with the inorganic oxide coating the periphery of the powder.

Specific examples of R, X ₁ , X ₂ , X _{3 and the} like include R ₃ such as CF ₃ and C.
₂ F ₅ , C ₄ F ₉ , C ₈ F ₁₇ , C ₁₂ F _{25 and the} like can be mentioned. Examples of X ₁ , X ₂ and X ₃ include Cl, Br, methoxy, ethoxy, propoxy, methyl, ethyl and propyl.

Specific examples of the perfluoroalkylsilane represented by the general formula (I) are, for example, C
F ₃ (CF ₂ ) ₃ CH ₂ CH ₂ Si (OCH ₃ ) ₃ , C
F ₃ (CF ₂ ) ₃ CH ₂ CH ₂ SiCl ₃ , CF ₃ (C
F ₂ ) ₇ CH ₂ CH ₂ Si (OCH ₃ ) ₃ , CF ₃ (C
F ₂ ) ₇ CH ₂ SiCH ₃ (OCH ₃ ) ₂ , CF ₃ (C
F ₂ ) ₃ CH ₂ CH ₂ CH ₂ Si (OCH ₂ C
H ₃ ) ₃ , CF ₃ (CF ₂ ) ₃ CH ₂ CH ₂ SiCH ₃
(OCH ₂ CH ₃ ) ₂ , CF ₃ CH ₂ CH ₂ SiC
l ₃ , CF ₃ CF ₂ CH ₂ CH ₂ Si (OCH ₃ ) ₃ ,
Suitable examples include CF ₃ (CF ₂ ) ₃ CH ₂ CH ₂ Si (OCH ₃ ) ₃ .

The treatment amount of the perfluoroalkylsilane represented by the general formula (I) with respect to the inorganic oxide-coated plate-like inorganic powder (plate-like inorganic powder having the periphery covered with an inorganic oxide) is the plate-like inorganic powder. Although it varies depending on the type of powder, the specific surface area, the type of inorganic oxide coating the periphery of the plate-like inorganic powder, etc. 50% by weight, especially 3 to 20% by weight is preferred.

That is, when the perfluoroalkylsilane represented by the general formula (I) is less than 0.1% by weight based on the inorganic oxide-coated plate-like inorganic powder, sufficient water repellency and oil repellency can be obtained. In addition, when the perfluoroalkylsilane represented by the general formula (I) is more than 50% by weight with respect to the inorganic oxide-coated plate-like inorganic powder, elongation and feel when blended in a cosmetic and applied to the skin. And so on.

The method for treating the inorganic oxide-coated plate-like inorganic powder with the perfluoroalkylsilane represented by the general formula (I) is, for example, in a mixing and stirring apparatus such as a ball mill, a sand grinder mill, a kneader or a disper. While mixing the inorganic oxide-coated plate-like inorganic powder with a solvent,
A perfluoroalkylsilane represented by the general formula (I) is added thereto, and the resulting mixture is uniformly dispersed, then heated and dried under normal pressure or reduced pressure to remove the solvent.

Next, the powder cosmetic of the present invention will be described in detail.

The powder cosmetic of the present invention preferably contains 1 to 90% by weight, particularly preferably 3 to 30% by weight, of the above-mentioned water- and oil-repellent pigment.

That is, when the content of the water and oil repellent pigment in the powder cosmetic is less than 1% by weight, much cannot be expected to impart water repellency and oil repellency to the makeup film, and the elongation, spread and adhesion It cannot be expected that the makeup stickiness and makeup paste will be improved due to its good quality. Although the upper limit of the content of the water / oil repellent pigment in the powder cosmetic is not necessarily limited,
The content is preferably 90% by weight or less in view of the relationship with other components to be incorporated in the powder cosmetic, such as oil and pigments other than the water / oil repellent pigment.

The powder cosmetics referred to in the present invention are those in which the dispersed state of the blended oil component belongs to the pedicular region or the funicular region, and the pigment and / or powder content is about 55% by weight or more. It is a thing.

In the present invention, the above water- and oil-repellent pigment is incorporated into the powder cosmetic in the above-mentioned state to have water- and oil-repellency, and to give a makeup lasting effect and a makeup paste effect. The powder cosmetics capable of fully exhibiting the above are provided.

Specific examples of the powder cosmetics thus provided include, for example, makeup powders such as pressed powder, powder foundation, face powder, two-way cake, powder eye color, powder cheek, and powder lip. Other examples include dusting powder, talcum powder and baby powder.

Further, in addition to the water- and oil-repellent pigments as the above-mentioned essential components, various powders or pigments, oils, medicinal components, preservatives, perfumes, etc. are blended in the powder cosmetics of the present invention. be able to.

[0039]

The water- and oil-repellent pigment of the present invention is excellent in water repellency and oil repellency, and therefore, when blended in a cosmetic composition and applied to the skin, it prevents the makeup from being damaged by sweat, tears, rain or the like. be able to.

The water- and oil-repellent pigment of the present invention retains the transparency, elongation, feel, and good adhesion of the plate-like inorganic powder as a base material thereof, and is therefore incorporated into cosmetics. In that case, it does not affect the color tone of the cosmetic, and improves the spread on the skin, the feeling of touch, and the makeup paste.

Therefore, the powder cosmetic of the present invention containing the above water- and oil-repellent pigment is excellent in water repellency and oil repellency of the water- and oil-repellent pigment, and the plate-like inorganic powder which is the base material thereof. The transparency, elongation, feel, and good adhesion of
When applied to the skin, it has a smooth, slippery feel and a close contact feeling, and has excellent makeup retention and makeup paste.

Further, the water and oil repellent pigment of the present invention is required to have water repellency and oil repellency such as super water resistant paints, anti-icing paints, and fillers for fluororesins, in addition to the above cosmetics. It can also be suitably used for various applications.

[0043]

EXAMPLES Next, the present invention will be described more specifically with reference to examples. However, these examples do not limit the present invention. The water- and oil-repellent pigments of the present invention will be described in Examples 1 to 4, and the powder cosmetics of the present invention will be described in Examples 5 to 22. Further, prior to the examples, titanium dioxide 3 used in Examples 1 and 2 was used.
% Coated sericite (titanium dioxide-coated sericite whose titanium dioxide coating amount is 3% by weight based on sericite) and titanium dioxide 5% coated sericite (titanium dioxide coated surroundings) At the sericite,
Production of titanium dioxide having a coating amount of 5% by weight with respect to sericite) is shown as Reference Example 1 and Reference Example 2, respectively.

Reference Example 1 Aqueous titanyl sulfate solution (TiO ₂ conversion concentration = 9 g / l) 1
Commercially available sericite in liters (average particle size 5 μm) 2
91 g was added, and the mixture was heated with stirring to boil, and this state was maintained for 3 hours. After the heating was completed, the obtained dispersion was filtered and washed to obtain titanium oxide-coated sericite. The obtained titanium oxide-coated sericite was redispersed in water, the redispersed liquid was heated to 60 ° C. with stirring, and neutralized with a caustic soda aqueous solution until the pH became 7.0,
The mixture was stirred for another 30 minutes, then filtered and washed.

The product obtained was dried and then calcined at 800 ° C. to obtain 3% titanium dioxide-coated sericite.

Reference Example 2 Titanium dioxide 5% coated sericite was obtained in the same manner as in Reference Example 1, except that the titanyl sulfate aqueous solution had a TiO ₂ conversion concentration of 15 g / l and the added sericite was 285 g. It was

Example 1 250 g of toluene was placed in a tabletop kneader with an internal volume of 1 liter, and perfluoroalkylsilane [TSL-8233 (trade name) manufactured by Toshiba Silicone Co., Ltd.] was stirred.
And CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ Si (OCH ₃ )
₃ ] was added, and 100 g of the titanium dioxide 3% -coated sericite prepared in Reference Example 1 was added thereto, and the mixture was sufficiently stirred to form a slurry.

The slurry was heated to 110 ° C. and heated to 200
Toluene was removed while reducing the pressure to mmHg, and the mixture was cured at 150 ° C. for 3 hours and then pulverized to a fine powder.

The amount of perfluoroalkylsilane in the water and oil repellent pigment obtained as described above was 5% by weight based on 3% titanium dioxide-coated sericite.

Example 2 To a sand grinder mill having an internal volume of 1 liter, 350 g of toluene, 50 g of sericite coated with 5% titanium dioxide and the same perfluoroalkylsilane 2.5 as in Example 1 were used.
g, and mixed for 20 minutes to form a slurry.

The obtained slurry was transferred to a table kneader,
Heat to 110 ° C., then treat as in Example 1,
A water and oil repellent pigment was obtained.

The amount of perfluoroalkylsilane in the obtained water and oil repellent pigment was 5% by weight based on 5% titanium dioxide-coated sericite.

Example 3 Example 1 was repeated except that titanium dioxide 5% coated mica [SP-301 (trade name) manufactured by Teika Co., Ltd.] was used in place of titanium dioxide 3% coated sericite in Example 1. The same treatment as described above was carried out to obtain a water and oil repellent pigment.

The amount of perfluoroalkylsilane in the obtained water and oil repellent pigment was 5% by weight based on 5% titanium dioxide-coated mica.

Comparative Example 1 283 g of toluene was placed in a kneader having an internal volume of 1 liter, and 7.3 g of the same perfluoroalkylsilane of Example 1 was added with stirring, and commercially available sericite (reference example 1 (Before used titanium dioxide coating)
146 g was added and mixed for 10 minutes, then heated to 110 ° C., the toluene was removed while reducing the pressure to 200 mmHg, the mixture was cured at 150 ° C. for 3 hours, and then pulverized.

Comparative Example 2 To a sand grinder mill having an internal volume of 1 liter, 350 g of toluene and titanium dioxide [JA-1 manufactured by Teika Co., Ltd.
(Trade name)] 50 g and 2.5 g of the same perfluoroalkylsilane as in Example 1 were added and mixed for 20 minutes,
Made into a slurry.

The obtained slurry was transferred to a table kneader,
After heating to 110 ° C. and reducing the pressure to 200 mmHg to remove toluene and curing at 150 ° C. for 3 hours,
Crushed.

Comparative Example 3 The same treatment as in Example 1 was carried out except that 2 g of methylhydrogenpolysiloxane was used instead of 5 g of perfluoroalkylsilane used in Example 1.

Next, the water and oil repellency of the water and oil repellent pigments of Examples 1 to 3 and the pigments of Comparative Examples 1 to 3 and untreated samples 1 to 3 obtained as described above were examined. . The results are shown in Tables 1 to 3 below.

Untreated sample 1 is sericite, which is the same as the sericite in Reference Example 1 before coating with titanium dioxide. The untreated sample 2 is the same as the titanium dioxide 3% -coated sericite used in Example 1, and the untreated sample 3 is the titanium dioxide 5% -coated mica [SP-301 manufactured by Teika Co., Ltd.] used in Example 3. (Product name)].

The water repellency was measured on water itself, while the oil repellency was measured on oleic acid and toluene.

The test and evaluation methods for water repellency and oil repellency are as follows.

<Test and Evaluation Method> 0.1 g of each sample was placed in a test tube, and a solvent (water in the case of the water repellency test, oleic acid and toluene in the case of the oil repellency test) was added and dispersed therein. Then, after standing for a specific time shown in Tables 1 to 3, the thickness of the powder floating on the solvent (L ₁ )
And the thickness (L ₂ ) of the powder that has settled under the solvent are measured, and as shown in the following formula, the total thickness (L ₁
The ratio of the thickness (L ₁ ) of the floating powder to the + L ₂ ) is calculated, and the ratio is evaluated as the water repellency index or the oil repellency index. [L ₁ / (L ₁ + L ₂ )] × 10

That is, when the water repellency index or the oil repellency index calculated by the above formula is 10, it means that the powder is completely floated on the solvent and the water repellency or the oil repellency is excellent. Shows. Further, when the water repellency index or the oil repellency index calculated by the above formula is 0, it means that the powder is completely settled under the solvent and has no water repellency or oil repellency. That is, the greater the water repellency index or the oil repellency index, the better the water repellency or oil repellency.

[0065]

[Table 1]

As shown in Table 1, Examples 1 to 3 have a higher water repellency index and excellent water repellency than the untreated Samples 1 to 3. However, regarding water repellency, almost no difference is observed between Examples 1 to 3 and Comparative Examples 1 to 3.

[0067]

[Table 2]

As shown in Table 2, Examples 1 to 3 have a high oil repellency index and are as excellent in oil repellency as Comparative Example 2 in which the surface of titanium dioxide is treated with perfluoroalkylsilane against oleic acid. have.

[0069]

[Table 3]

As shown in Table 3, Examples 1 to 3 have a high oil repellency index and have the same excellent oil repellency as Comparative Example 2 in which the surface of titanium dioxide is treated with perfluoroalkylsilane with respect to toluene. Have

As is clear from the results shown in Tables 1 to 3, the water and oil repellent pigments of Examples 1 to 3 of the present invention have high water repellency index and oil repellency index, and have high water repellency and oil repellency. Was excellent.

Next, the transparency of the water / oil repellent pigment of the present invention will be clarified. In order to clarify this transparency, as shown below, as Example 4, a water- and oil-repellent pigment in which the surface of sericite coated with 10% titanium dioxide was treated with perfluoroalkylsilane was produced, and Comparative Example 4 was used. As a pigment, the surface of sericite coated with 20% titanium dioxide was treated with perfluoroalkylsilane.

Example 4 First, in accordance with Reference Example 1, sericite was coated on the periphery thereof with titanium dioxide to form 10% titanium dioxide-covered sericite (cericite coated on the periphery thereof with titanium dioxide having a coating amount of titanium dioxide of about 10%). 10% by weight based on sericite)
Was prepared and treated in the same manner as in Example 1 except that this 10% titanium dioxide-coated sericite was used in place of the titanium dioxide 3% -coated sericite in Example 1 to obtain a water- and oil-repellent pigment. . The amount of perfluoroalkylsilane in the obtained water and oil repellent pigment was 5% by weight based on 10% titanium dioxide-coated sericite.

Comparative Example 4 First of all, according to Reference Example 1, sericite was coated on the periphery thereof with titanium dioxide to form a 20% titanium dioxide-coated sericite. 20% by weight based on sericite)
Was prepared, and the same treatment as in Example 1 was carried out except that this 20% titanium dioxide-coated sericite was used in place of the titanium dioxide 3% -coated sericite in Example 1, to obtain a water- and oil-repellent pigment. . The amount of perfluoroalkylsilane in the obtained water and oil repellent pigment was 5% by weight based on 20% titanium dioxide-coated sericite.

The method for measuring transparency and the results are as follows.

<Measurement Method of Transparency> First, as a sample, Examples 1 to 2 in which the plate-like inorganic powder is sericite, Example 4, Comparative Example 1 and Comparative Example 4 were used. It was investigated how the transmittance for visible light changes with the change in the amount of titanium dioxide to be coated, and the transparency of the water- and oil-repellent pigments of Examples 1 to 2 and 4 of the present invention was examined based on the results. Reveal sex.

Using 2 g of each sample, a nitrocellulose paint was prepared according to the following formulation, and the obtained paint was applied to cellophane paper with a 1.5 mil applicator, and the wavelengths of the coating film after drying were 400 nm and 500 nm. The light transmittance at was measured with a spectrophotometer equipped with an integrating sphere.

<Paint formulation and preparation> Nitrocellulose liquid (solid content 20.8%) 30 g Sample 2 g Alumina beads 50 g (pigment solid content weight / resin solid content weight = 0.3)

The paint was prepared by placing each sample having the above composition in a container and dispersing it for 20 minutes with a paint conditioner.

Table 4 shows the measurement results of the light transmittance. The higher the light transmittance shown in Table 4, the better the transparency of the sample.

[0081]

[Table 4]

As can be seen from the results shown in Table 4, the transmittance for visible light decreases as the amount of titanium dioxide coating the surface of sericite increases, but Examples 1-2 and Example 4 Can be said to have a high light transmittance and be in a range having sufficient transparency.

Further, the coating amount of titanium dioxide is 20% by weight.
In Comparative Example 4 of Comparative Example 1, the light transmittance is significantly reduced. Therefore, in Comparative Example 2 in which the surface of titanium dioxide itself is treated with perfluoroalkylsilane, the transmittance for visible light is low and the transparency is low. It turns out that they do not have it.

Next, examples of powder cosmetics containing the water and oil repellent pigment of the present invention will be described. The blending ratio of the components is% by weight.

Examples 5 to 13 [Powder Foundation] The components having the compositions shown in Tables 5 to 6 were mixed for 1 minute at 1,500 rpm using a Henschel mixer, and then 0.7 to
Using a 1.0 mm round hole mesh, it was pulverized with a pulverizer. Next, the above pulverized product was mixed with an oil agent at 1,500 rpm for 10 minutes using a Henschel mixer, and subsequently, using a herringbone type mesh of 1.5 to 2 mm, pulverized by a pulverizer and press-molded to obtain a powder foundation. Got The compositions of the powder foundations of Examples 5 to 9 are shown in Table 5, and
Table 6 shows the composition of the powder foundation of No. 13.

[0086]

[Table 5]

[0087]

[Table 6]

Comparative Examples 5-8 [Powder Foundation] Using the components having the compositions shown in Table 7, powder foundations of Comparative Examples 5-8 were obtained in the same manner as in Examples 5-13.

[0089]

[Table 7]

Examples 5 to 13 obtained as described above
With respect to the powder foundation of No. 1 and the powder foundations of Comparative Examples 5 to 8, the makeup paste and makeup moisturizing were evaluated by a sensory test by 20 panelists specialized in makeup.

The method and evaluation criteria of the sensory evaluation test are as follows. <Test Method and Evaluation Criteria> Each powder foundation was applied to the entire face of the panel, and the makeup paste at the time of application and the makeup lasting 3 hours after application were sensory-evaluated according to the following evaluation criteria, and the average value was evaluated. To do. The results are shown in Table 8.

Evaluation Standard for Makeup Glue : 5: Smooth and clean adhesion 1: Poor adhesion and poor adhesion For intermediate 4 to 2, the evaluation value is determined according to the degree based on 5 and 1 above.

Evaluation Criteria for Makeup Moisture: 5: There is no makeup blush, no shine. 1: Makeup is buffed or shining. For the middle 4 to 2, the above 5 and 1 are used as a reference, depending on the degree. To determine the evaluation value. It should be noted that the shine is a state in which the makeup film shines due to wetting due to sebum.

[0094]

[Table 8]

As shown in Table 8, the powder foundations of Examples 5 to 13 are superior to the powder foundations of Comparative Examples 5 to 8 in terms of both the applied makeup and the makeup retention after application. It was proved.

Examples 14 to 22 [Pressed powder] The components having the compositions shown in Tables 9 to 10 were mixed for 1 minute at 1,500 rpm using a Henschel mixer, and then 0.7
Using a ˜1.0 mm round hole mesh, it was pulverized with a pulverizer. Next, the pulverized product was mixed with an oil agent using a Henschel mixer at 1,500 rpm for 10 minutes,
Then, using a herringbone type mesh of 1.5 to 2 mm, it was crushed by a pulverizer and press-molded to obtain a pressed powder. The compositions of the pressed powders of Examples 14 to 18 are shown in Table 9, and the compositions of the pressed powders of Examples 19 to 22 are shown in Table 10.

[0097]

[Table 9]

[0098]

[Table 10]

Comparative Examples 9 to 12 [Pressed Powder] Using the components having the compositions shown in Table 11, the pressed powders of Comparative Examples 9 to 12 were obtained in the same manner as in Examples 14 to 22.

[0100]

[Table 11]

Examples 14 to 2 obtained as described above
For the pressed powder of No. 2 and the pressed powders of Comparative Examples 9 to 12, the makeup paste at the time of application and the makeup moisturization after 3 hours from the application were made by 20 panelists specialized in makeup in the same manner as in the case of the powder foundation. Sensory evaluation was performed by the method. The results are shown in Table 12.

[0102]

[Table 12]

As shown in Table 12, the pressed powders of Examples 14 to 22 are superior to the pressed powders of Comparative Examples 9 to 12 in terms of both the makeup paste at the time of application and the makeup lasting effect after application. It was proved that.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuji Nishida 1-3-47 Funamachi, Taisho-ku, Osaka Teika Co., Ltd. (72) Inventor Kazuhiro Nishikata 27 Takashimadai, Kanagawa-ku, Yokohama, Kanagawa Prefecture Polar Yokohama Research (72) Inventor, Junji Shiozawa, 27, Takashimadai, Kanagawa-ku, Yokohama, Kanagawa, 1 Pola Yokohama Laboratory (72) Inventor: Nao Nakamura, 27, Takashimadai, Kanagawa-ku, Yokohama, Kanagawa

Claims (5)

[Claims] 1. A plate-like inorganic powder is coated around the plate-like inorganic powder with 1 to 10% by weight of an inorganic oxide, and the surface thereof is further represented by the following general formula (I) R (CH _{2 ) n SiX 1 X 2 X 3} (I) ( wherein, R represents a perfluoroalkyl group having 1 to 12 carbon atoms, n represents an integer of 1 to 5 .X _1, X ₂ and X
₃ is an alkoxy group, a halogen group or an alkyl group, and X ₁ , X ₂ and X ₃ may be the same or different. However, a water- and oil-repellent pigment obtained by treating with a perfluoroalkylsilane represented by the formula (where X ₁ , X ₂ and X ₃ are all alkyl groups are excluded). 2. The water- and oil-repellent pigment according to claim 1, wherein the plate-like inorganic powder is sericite or mica, and the inorganic oxide is titanium dioxide. 3. A plate-like inorganic powder is coated around the plate-like inorganic powder with 1 to 10% by weight of an inorganic oxide, and the surface thereof is further represented by the following general formula (I) R (CH _{2 ) n SiX 1 X 2 X 3} (I) ( wherein, R represents a perfluoroalkyl group having 1 to 12 carbon atoms, n represents an integer of 1 to 5 .X _1, X ₂ and X
₃ is an alkoxy group, a halogen group or an alkyl group, and X ₁ , X ₂ and X ₃ may be the same or different. However, a powder cosmetic containing a water- and oil-repellent pigment obtained by treating with a perfluoroalkylsilane represented by the formula (where X ₁ , X ₂ and X ₃ are all alkyl groups is excluded). 4. The powder cosmetic according to claim 3, wherein the plate-like inorganic powder is sericite or mica, and the inorganic oxide is titanium dioxide. 5. The content of the water-repellent and oil-repellent pigment is 1 to 90% by weight in the whole powder cosmetic.
Powder cosmetics described.