JPH0516403B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to pigment-containing powder cosmetics, more specifically,
Contains a complex coloring pigment made by treating a mixture of organic pigment and cosmetic powder with a lipophilic agent and hydrophobized anhydrous silica, it has long lasting makeup, is easy to remove makeup, and does not leave the pigment on the skin. This invention relates to a pigment-containing powder cosmetic with little residue. [Prior art and its problems] Powder cosmetics containing pigments include white powder, foundation, blusher, eye shadow, and the like.
Generally, organic pigments are often used as pigments in these powder cosmetics because they come in a wide variety of colors and can provide bright, transparent tones.However, organic pigments have small particles, so , it gets into the skin grooves, making it difficult to cleanse when removing makeup, and the pigment inevitably remains, causing dullness of the skin. Particularly in areas such as around the eyes, it is difficult to apply cleansing cream and the like, and it is also difficult to remove the pigment completely, making it very difficult to completely remove the pigment. As a countermeasure for this, the particle size is larger than that of organic dyes,
Inorganic colored pigments or colored pearls (mica titanium treated with a coloring agent) that are easy to cleanse are used. However, inorganic colored pigments do not provide clear and vivid color tones, and colored pearls are expensive and have the disadvantage that it is difficult to obtain the desired color tone. Against this background, research has been carried out on the conjugation of organic pigments. For example, methods have been developed to conjugate organic pigments by treating them with water repellents such as higher fatty acids, higher alcohols, fatty acid esters, and metal soaps. However, even with this method, the organic pigment is not completely covered with the water repellent and causes clumps, so the persistence on the skin cannot be completely eliminated. In addition, there are methods of fixing acidic dyes to basic polymers (Japanese Patent Application Laid-Open No. 57-180527), methods of treating lake dyes etc. with metal soap, and then coating them with polymers (Japanese Patent Application Laid-Open No. 57-40564), and , a method using silk powder dyed with a water-soluble tar dye as a coloring pigment (Japanese Patent Application Laid-Open No. 101411/1983) has been proposed. However, in either method, there are restrictions on the organic pigments that can be used, and a cosmetic containing colored powder that can be applied to any organic pigment, is easy to use, and has little residual effect on the skin has not yet been proposed. . In addition, as an application of the method of applying silicone treatment to powder (Japanese Patent Laid-open No. 16404/1983), it is possible to apply silicone treatment to organic pigments and lakes, but such silicone treatment does not affect the skin. Although it has the effect of reducing the affinity to some extent, it is insufficient in terms of eliminating skin persistence, and although it is relatively resistant to water, it has the disadvantage that it runs off with sweat or gets twisted. [Means for Solving the Problems] Under such circumstances, the present inventor has completed the present invention as a result of conducting intensive research to solve the above-mentioned problems. That is, the present invention provides a composite pigment prepared by treating a homogeneous mixture of 1 to 30% by weight of an organic pigment and 70 to 99% by weight of a powder for cosmetics with a lipophilic agent, and a composite pigment with an average particle size of 1 to 30% by weight.
The present invention provides a pigment-containing powder cosmetic, which is characterized by containing hydrophobized anhydrous silica with a particle size of 100 mμ or less as an essential component. In the present invention, any organic dye that is currently allowed to be used can be used. Any known powder for cosmetics can be used, such as talc, sericite, mica,
Kaolin, silica, barium sulfate, nylon powder, polyethylene powder, silk powder,
Examples include cellulose powder. This powder for cosmetics preferably has an average particle size of 30 microns or less, particularly 3 to 20 microns, and if it is smaller than 3 microns, there is a high possibility that it will remain on the skin. The ratio of the organic pigment to the powder for cosmetics depends on the physical properties of the powder for cosmetics, such as particle size, particle shape, specific surface area, etc.; Especially 3-25%, powder for cosmetics 70-99%,
In particular, it is preferable to set it to 75 to 97%. Both are mixed uniformly to disperse or adsorb the organic pigment into the cosmetic powder. For uniform adsorption, a wet method in which the material is dispersed in a solvent and dried is preferred. Examples of lipophilic agents include silicones, higher alcohols, higher fatty acids or metal salts thereof, fatty acid esters, glycerides, amino acids, alkyl phosphates, and the like. A method for treating a mixture of the organic pigment and cosmetic powder using these lipophilic agents is to dissolve the lipophilic agent in water or an organic solvent, disperse the powder mixture, and then After heating to about the boiling point of the solvent used and maintaining that temperature for several hours, the solvent is removed and dried. Alternatively, when using a liquid lipophilic agent, add the powder mixture to the lipophilic agent alone or to which a small amount of solvent has been added, mix thoroughly, dry and bake to form a composite pigment. There is a way to get it. In the present invention, it is necessary that the hydrophobized anhydrous silica be fine particles with an average particle size of 100 mμ or less, particularly preferably 50 mμ or less. The average particle size is
If it exceeds 100 mμ, the powder coating will be insufficient and the silica itself will feel undesirable. Hydrophobization of anhydrous silica can be carried out by a method known per se, and either a method using a gas phase reaction or a method using a wet treatment can be adopted. Examples of hydrophobized products using a gas phase reaction method include those treated with alkylchlorosilanes such as dimethyldichlorosilane, silane compounds such as octyltrimethoxysilane, and hexamethyldisilazane. Among these, dimethyldichlorosilane The most well-known is Aerosil R-972 (manufactured by Degussa AG, West Germany). Further, as the material hydrophobized by a wet method, it is preferable to use a silicone represented by the following formula () or a mixture of a silicone represented by the formula () and a silicone represented by the formula (). (In the formula, R represents a lower alkyl group, a benzyl group, a cyclohexyl group, a naphthyl group, a furfuryl group, or a hydrogen atom, n represents a number of 1 to 1000, and m represents a number of 10 to 1000.)
(represents the number 200) In addition, if the hydrophobization treatment is performed only with silicone of the formula (), hydrogen may be generated, which is dangerous.
It is preferable to use it in combination with silicone of formula (). The amount of silicone used for hydrophobization treatment depends on the specific surface area of anhydrous silica, but
5 to 30 parts by weight of silicone to 95 parts by weight, especially 15 to 30 parts by weight of silicone to 75 to 85 parts by weight of anhydrous silica.
25 parts by weight is preferable because it has high water repellency and low agglomeration. Examples of such hydrophobized anhydrous silica include Aerosil RY-200 (manufactured by Nippon Aerosil Co., Ltd.) and SI-Aerosil (manufactured by Miyoshi Kasei Co., Ltd.). The pigment-containing powder cosmetic of the present invention is prepared by mixing the above composite pigment and hydrophobized anhydrous silica, and mechanochemically coating the surface of the composite pigment with a fine powder of hydrophobized anhydride silica. .
This coating method is not particularly limited, but if the composite pigment is agglomerated, rough mixing may be performed in advance using a plastic bag for small amounts, or a disper, varicine, ribbon blender, V-type blender, etc. for large amounts. After that, it is preferable to crush it using a pin mill, a hammer mill, or the like. The amount of hydrophobized silica added is preferably 0.2 to 20%, particularly 0.5 to 10% of the composite pigment, and the amount of hydrophobized silica is
It is preferably 0.2 to 10%, particularly 0.5 to 5%. The pigment-containing powder cosmetic of the present invention can be obtained by mixing the composite pigment and hydrophobized anhydrous silica in advance as described above, and blending it with other ingredients. It can also be obtained by adding and mixing hydrophobized anhydrous silica to a mixture of pigments and other components. [Function and Effect] As mentioned above, the pigment-containing powder cosmetic of the present invention has the following properties:
Since the composite pigment is encapsulated by fine particles of hydrophobized anhydrous silica, the composite pigment does not come into direct contact with the skin, but adheres to the skin via a thin film of hydrophobized anhydride silica. As a result, when pine surge is performed using a cleansing cream or the like, the pigment is dispersed and removed by the physicochemical interaction with the cleansing cream or the like, and the pigment does not remain on the skin surface. Furthermore, since the hydrophobized anhydrous silica that encapsulates the composite pigment is an extremely thin film, it blends well with the cosmetic base cream and the skin, and has excellent makeup retention. [Example] Next, an example will be given and explained. Example 1 Powder eye shadow [Composition] Example 1 Comparative example 1 Silicone treatment ^* talc 20.15 26.9 Silicone treatment ^* mica 10 10 Composite pigment (1) 2.5 − Red No. 226 − 0.25 Composite cosmetic (2) 5.0 − Blue No. 404 − 0.5 Black iron oxide 0.25 0.25 Silicon-treated mica ^* titanium 40 40 Zinc stearate 10 10 Hydrophobized anhydrous silica 2 2 Liquid paraffin 10 10 Preservative 0.1 0.1 [Preparation method] Composite pigment (1): Red No. 226/ Mica/silicone mixed in a ratio of 10/88/2 (weight ratio) and coated. Composite pigment (2): Red No. 404/mica/silicone mixed in a ratio of 10/88/2 (weight ratio) and coated. Hydrophobized anhydrous silica: Aerosil R972 * Each powder is coated with 2% silicone. Manufacturing method: Mix the powder part with a Henschel mixer, add oil, and then crush with a hammer mill to make it uniform. Use this as it is or press mold it. [Results] The powder eye shadow obtained above was evaluated as follows. The results are shown in Table 1. The evaluation was based on the following criteria. Ease of application, ease of blurring, color development, and ease of removal were evaluated using a 5-point scale by 10 expert panelists, and the average values are shown. To determine skin persistence, a certain amount of the pigment was applied to a certain area of the upper arm, washed with a cleansing cream, applied as a pack, and after drying, the amount of pigment adhered to the pack polymer was visually observed. ○ Almost no adhesion △ Slight adhesion × Significant adhesion

【table】 Example 2 Blushing

【table】

[Preparation method]

Composite pigment (3): Red No. 226/talc is uniformly mixed and dispersed in a ratio of 20/80 (weight ratio), and coated with 2% aluminum stearate. Composite pigment (4): Red No. 202/talc is uniformly mixed and dispersed in a ratio of 20/80 (weight ratio), and coated with 2% aluminum stearate. Composite pigment (5): Yellow No. 4 Al lake/talc
Evenly mixed and dispersed at a ratio of 20/80 (weight ratio),
Coat with 2% aluminum stearate. Hydrophobic anhydrous silica: Aerosil RY-200 Manufacturing method: The powder part is roughly mixed in a disper mill, then pulverized in a pin mill, and then transferred to a Henschel mixer. While stirring with a Henschel mixer, add the oil phase in which the wax is dissolved, and then add the fragrance. Then, take it out from the Henschel mixer and grind it into a homogeneous powder using a hammer mill. This can be used as it is or after being press-molded. [Results] The blush obtained above was evaluated in the same manner as in Example 1. The results are shown in Table 2.

【table】

Claims (1)

[Scope of Claims] 1. 1 to 30% by weight of organic pigment and 70 to 30% by weight of powder for cosmetics
A pigment-containing powder cosmetic comprising, as essential ingredients, a composite pigment obtained by treating a homogeneous mixture of 99% by weight with a lipophilic agent and hydrophobized anhydrous silica with an average particle size of 100 mμ or less. 2 The lipophilic agent is silicone, higher alcohol,
The pigment-containing powder cosmetic according to claim 1, which is a higher fatty acid or a metal salt thereof, a fatty acid ester, a glyceride, an alkyl phosphate, or an amino acid. 3. The pigment-containing powder cosmetic according to claim 1, wherein the hydrophobized anhydrous silica is anhydrous silica that has been hydrophobized with a silane compound. 4 The silane compound is an alkylchlorosilane,
The pigment-containing powder cosmetic according to claim 3, which is octyltrimethoxysilane or hexamethyldisilazane. 5. The pigment-containing powder cosmetic according to claim 1, wherein the hydrophobized anhydrous silica is hydrophobized with a silicone represented by the following formula () or a mixture of this and a silicone represented by the following formula (). fee. (In the formula, R represents a lower alkyl group, a benzyl group, a cyclohexyl group, a naphthyl group, a furfuryl group, or a hydrogen atom, n represents a number of 1 to 1000, and m represents a number of 10 to 1000.)
200).