JP2005194212A - Cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prepare a cosmetic which provides evenness to the skin by masking wrinkles and surface irregularities of the skin, imparts resilience and luster to the skin and lasts long on the skin. <P>SOLUTION: This cosmetic comprises 0.01-25 wt.% multifunctional powder which has a high light transmission and a high diffused reflectivity. The powder is prepared by coating (A) a light-transmitting organic polymer powder of a specific shape with (B) a flat inorganic powder having a refractive index of ≤2.3 and (C) a water-soluble polymer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention provides a finish function that prevents dullness of the cosmetic film to give a transparent feeling, hides wrinkles and unevenness of the skin to make the skin uniform, and gives the skin a “feel” and “luster”. Further, the present invention relates to a cosmetic that is excellent in sustaining the cosmetic effect.

As a function of the cosmetics represented by the foundation, the skin has a uniform skin that hides the wrinkles and unevenness of the skin while preventing the dullness of the cosmetic film and keeping it transparent for a beautiful finish and rejuvenation in appearance. In addition, there is a demand for a function that further enhances the makeup effect while imparting a “feel” and “luster” to the skin.

Of these, in order to show the “feel” and “gloss” effectively, the plate powder was coated with fine particles, the powder with moderate hiding power was made into a plate shape, and a unique shape was given. Methods for blending powders and the like into cosmetics have been reported.

JP 2002-146238 A Akira Sugawara, Fragrance Journal, 31 (4), 29 (2003) Ogawa Katsumi et al., Abstracts of 2000 Color Material Research Presentation, 158

On the other hand, with regard to makeup, there is a description that natural and synthetic moisturizing ingredients contribute to the maintenance of the makeup effect while moisturizing the skin, as in Patent Documents 2-3.

JP-A-2-157208 JP-A-10-175823

By the way, since the powder that imparts “feel” and “luster” to the skin generally has high smoothness, there is a problem in sustaining the makeup effect. In other words, cosmetics formulated with a powder that also imparts a “feel” to the skin and a “luster” of the skin have poor adhesion to the skin due to the smoothness of the powder, and make up products with good makeup, such as makeup. It wasn't.

In view of the above situation, there has been a demand for the development of cosmetics with good makeup by adding some makeup-retaining ingredients together with the effect of giving the skin a “feel” and “shininess”.

Therefore, the object of the present invention is to prevent dullness of the cosmetic film to give a transparent feeling, to hide the wrinkles and unevenness of the skin to make the skin uniform, to give the skin a “feel” and “gloss”, etc. It is to provide a cosmetic that improves the finish function of the skin and that is excellent in sustaining the makeup effect.

In such a situation, the present inventors have conducted intensive research. As a result, the light-transmitting organic polymer powder having a specific shape is coated with a plate-like inorganic powder and a water-soluble polymer, thereby transmitting light. Cosmetics containing 0.01 to 25% by weight of composite functional powder with improved diffusivity and diffuse reflectivity to hide the wrinkles and unevenness of the skin and make it appear on a uniform skin. And the like, and the makeup was also found to be excellent, and the present invention was completed.

That is, (A) a light-transmitting organic polymer as a core of the composite functional powder, (B) a plate-like inorganic powder as a coating of the composite functional powder, and (C) a water-soluble polymer as constituent components It has been found that a cosmetic containing 0.01 to 25% by weight of a composite functional powder containing a cosmetic has an excellent finish and makeup.

In the cosmetic of the present invention, a light-transmitting organic polymer powder having a specific shape is coated with a plate-like inorganic powder and a water-soluble polymer, thereby improving the light transmittance and the diffuse reflectance. By blending 0.01 to 25% by weight of the functional powder, there is an advantage over the finish such as “feel” and “gloss” and makeup feeling.

The present invention includes (A) a light-transmitting organic polymer powder as a core of the composite functional powder, (B) a plate-like inorganic powder as a coating of the composite functional powder, and (C) as constituent components. It is a cosmetic containing 0.01 to 25% by weight of a composite functional powder containing a water-soluble polymer.

As the component (A) light-transmitting organic polymer powder of the composite functional powder blended in the cosmetic of the present invention, those usually used as cosmetic raw materials are used. The compounding amount in the composite functional powder is 30 to 80% by weight, preferably 40 to 70% by weight.

Here, examples of the shape of the light-transmitting organic polymer powder include a spherical shape, a spindle shape, a star shape, a petal shape, a ribbon shape, a butterfly shape, a starfish shape, a needle shape, a rod shape, and a hemispherical shape. Spherical, spindle-shaped, hemispherical, convex lens-shaped, and rugby-ball-shaped have light-transmitting properties because it is easy to obtain diffuse reflection with a high wrinkle concealing effect and to fix plate-like powder on the surface. The conspicuousness of the skin “wrinkles”, which is a defect, can be suppressed, which is desirable in the present invention. Among them, the convex lens-like powder is particularly preferable in the present invention because both the adhesion to the skin and the light scattering effect are good and the smoothness of use feeling is not impaired.

The component of the light transmissive organic polymer powder contains at least one organic polymer such as nylon, polystyrene, acrylic resin, silicon resin, polyethylene, and polyester. In the present invention, cross-linked methyl methacrylate, which is a kind of acrylic resin, is most preferable for reasons such as composition stability, adhesion to the skin, and good touch.

The average particle diameter of the light-transmitting organic polymer powder having these specific shapes is preferably in the range of 1 to 50 μm, preferably 2 to 25 μm. When the average particle diameter is less than 1 μm, scattering is very high due to surface diffuse reflection light, and the glossiness of the cosmetic is impaired. Moreover, when it exceeds 50 micrometers, the physical irritation | stimulation to skin is felt and it is unpreferable. The average particle diameter is the diameter of the powder in the case of spherical particles, and is determined as the length of the longest part of the particles in the case of other particles.

As the plate-like inorganic powder that is the constituent component (B) of the composite functional powder of the present invention, those usually used as cosmetic raw materials are used. As a compounding quantity in composite function powder, it is 20 to 70 weight%, Preferably it is 30 to 60 weight%.

Here, the component of the plate-like inorganic powder is not particularly limited as long as it is a component of an inorganic substance having a low hiding power. The plate-like powder enhances specular reflection optically and makes the skin feel “glossy” and “shiny” high. In addition, a powder having a high hiding power exceeding a refractive index of 2.3 is not desirable because specular reflection is excessively emphasized, resulting in an unnatural glossiness.

Examples of the components of the plate-like inorganic powder include metal oxides, metal hydroxides, composites containing any of these, and substances containing at least one of these hydrates and inorganic salts. In particular, any of silica, alumina, zirconia, sericite, zinc oxide, talc, mica, aluminum hydroxide, hydroxyapatite, boron nitride, calcium carbonate, magnesium fluoride, and barium sulfate is preferable, and silica is particularly suitable. It has transparency and is preferable.

As the water-soluble polymer which is the constituent component (C) of the composite functional powder of the present invention, those usually used as cosmetic raw materials are used. As the compounding amount in the composite functional powder, the water-soluble polymer is preferably 0.1 to 15% by weight as a dry weight.

The water-soluble polymer necessary as a component of the composite functional powder is not specified as long as it has compatibility with both the organic powder and the inorganic powder, but preferably has a moisturizing effect.

Examples of water-soluble polymers include hyaluronic acid and salts or derivatives thereof, acidic mucopolysaccharides, collagen and derivatives thereof, proteoglycans and derivatives thereof, phosphorylcholine / acrylic derivative copolymers, carboxyl vinyl polymers, carboxyl methyl cellulose, carboxyl ethyl cellulose, methyl cellulose, Ethyl cellulose, xanthan gum, alginate, glucan, carrageenan, quince seed gum, pectin, guar gum, starch, chitin, chitosan and the like are preferable, and two or more thereof may be mixed. Among these, a 2-methacryloyloxyethyl phosphorylcholine / methacrylbutyl copolymer is more preferable as a kind of a phosphorylcholine / acrylic derivative copolymer.

The composite functional powder blended with the cosmetic of the present invention has the light-transmitting organic polymer powder as the component (A) as a core, the plate-like inorganic powder as the component (B), and the water-soluble high content as the component (C). The compound is coated with a molecule to form a complex. As a complexing method, a method of drying after mixing all components used as a general method, a spray drying method, or the like may be used.

As one preferable example of the novel composite functional powder to be blended in the cosmetic material of the present invention, the silica resin powder having the convex lens shape as component (A) is mixed with plate-like silica as component (B), and the component ( A novel composite functional powder is prepared by spraying an aqueous solution of a water-soluble polymer (C) and drying.

The blending amount of the composite functional powder blended in the cosmetic of the present invention is preferably in the range of 0.01 to 25% by weight. When the blending amount is less than 0.01% by weight, the effect does not appear. On the other hand, if it exceeds 25% by weight, the effect is not improved and it is inefficient, which is not preferable.

As other components of the cosmetic of the present invention, it can be selected from components blended in ordinary cosmetics according to the form of the intended cosmetic. These components include water, fats and oils, waxes, hydrocarbons, fatty acids, alcohols, alkyl glyceryl ethers, esters, silicone oils, fluorine oils, polyhydric alcohols, sugars, polymers, surfactants, moisturizers, UV absorbers. Agents, chelating agents, pH adjusters, antioxidants, sequestering agents, bactericides / preservatives, dyes, fragrances, pigments, plasticizers, organic solvents, drugs, animal and plant extracts, constitution powders, organic colorants, inorganic Coloring materials, pearl pigments, surface-treated powders, composite pigments, oily gelling agents, amino acids and peptides, vitamins, and the like can be mentioned, and they can be blended within a range that does not impair the object of the present invention.

Examples of the cosmetics of the present invention include, for example, powder foundations, oily foundations, emulsified foundations, blusher, white powder, eyebrow, eyeshadow, eyeliner, lipstick, makeup base and the like.

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples.

[Composite function powder 1]
Convex lens type cross-linked methyl methacrylate powder 100g (manufactured by Sekisui Plastics, Techpolymer L-XC-F005M) and plate-like silica powder (Mizusawa Chemical, Sylleaf) were mixed at high speed with a Henschel mixer and 2-methacryloyloxyethyl. 100 g of a 5% by weight aqueous solution of phosphorylcholine / butyl methacrylate copolymer was sprayed and dispersed uniformly, and then heated at 60 ° C. under reduced pressure to remove volatile matter, whereby composite functional powder 1 was obtained.

[Composite function powder 2]
60 g of spherical 12 nylon powder (manufactured by Atochem, Orgazole 2002) and 30 g of boron nitride (manufactured by Mizushima Alloy Iron, Serum Blanche SHP-4) are mixed with a rake machine, and 10 g of dried proteoglycan extracted from shark cartilage and 500 g of water are added, The mixture was dispersed with a homomixer and stirred at 80 ° C. for 2 hours. Then, water was filtered, solid content was dried and pulverized to obtain a composite functional powder 2.

[Composite function powder 3]
100 g of water-soluble collagen solution (1% by weight aqueous solution of atelocollagen) is added to powder obtained by mixing 65 g of spherical polyacrylic acid 45 g (manufactured by Matsumoto Yushi, Microsphere) with 65 g of barium sulfate (manufactured by Sakai Chemical Industry, plate-like barium sulfate). The composite functional powder 3 was obtained by spray drying and mixed drying.

[Comparative composite powder 1]
100 g of convex lens type cross-linked methyl methacrylate powder (manufactured by Sekisui Plastics, Techpolymer L-XC-F005M) is mixed at high speed with 100 g of plate-like silica powder (manufactured by Mizusawa Chemical Co., Ltd., Sylleaf) to obtain a comparative composite powder 1 It was.

[Comparative composite powder 2]
Add 100 g of 2-methacryloyloxyethyl phosphorylcholine / butyl methacrylate copolymer 5% by weight to 100 g of convex lens-type crosslinked methyl methacrylate powder (Sekisui Chemical Co., Ltd., Techpolymer L-XC-F005M) and uniformly disperse it. After that, the mixture was heated at 60 ° C. under reduced pressure to remove volatile matter, and Comparative Composite Powder 2 was obtained.

[Comparative composite powder 3]
To 100 g of platy silica powder (Silleaf, manufactured by Mizusawa Chemical), 100 g of a 5% by weight aqueous solution of 2-methacryloyloxyethyl phosphorylcholine / butyl methacrylate copolymer was sprayed and dispersed uniformly, and then heated at 60 ° C. under reduced pressure. Volatile components were removed to obtain comparative composite powder 3.

A powder foundation containing the composite functional powders 1 to 3 and the comparative composite powders 1 to 3 was prepared according to the formulation shown in Table 1. The unit of numerical values in Table 1 is% by weight.

The products of Formulation Examples 1 to 4 and Comparative Examples 1 to 5 were pulverized through a sieve after uniformly mixing all components. This was compression molded into a metal pan to obtain a powder foundation.

The finish “feel” immediately after application to the skin and evaluation of the wrinkle hiding effect were performed. The results are shown in Table 2.
<Skin feel>
Sensory evaluation was performed by 10 expert panelists, and the evaluation was performed in 7 stages using the evaluation criteria of (1), and the average value was evaluated according to the criteria shown in (2).
(1)
7 points: Very good 6 points: Good 5 points: Slightly good 4 points: Normal 3 points: Slightly bad 2 points: Bad 1 point: Very bad (2)
◎: 6 points or more ○: 4 points or more and less than 6 points Δ: 3 points or more and less than 4 points ×: Less than 3 points <Wrinkle concealment effect>
Sensory evaluation was performed by 10 expert panelists, and the results were shown in the following criteria.
◯: 8 or more felt good △: 4-7 felt good x: Fewer than 4 felt good

From Table 2, it was revealed that Formulation Examples 1 to 4 and Comparative Example 5 foundation have both “feel” of skin and wrinkle hiding effect. In Comparative Example 1, the skin “feel” and the effect of hiding the wrinkles were somewhat unsatisfactory, and this revealed the necessity of the composite powder being coated with a water-soluble polymer. In Comparative Example 2, the composite powder not containing the plate-like powder powder was inferior in the effect of giving a “feel”. Moreover, it can be judged from Comparative Example 3 that the light transmissive polymer powder is necessary for the wrinkle concealment effect. In Comparative Example 4, since the compounding amount of the composite functional powder was small, both “feel” and the effect of hiding the wrinkles were insufficient.

Next, the durability of the makeup effect was evaluated by applying a “feel” of the finish when applied to the skin and the durability of the wrinkle hiding effect. The results are shown in Table 3.
<Skin feel>
Sensory evaluation was performed 4 hours after application by 10 expert panelists, and 7 evaluations were made using the evaluation criteria of (1), and the average value was evaluated according to the criteria shown in (2).
(1)
7 points: Very good 6 points: Good 5 points: Slightly good 4 points: Normal 3 points: Slightly bad 2 points: Bad 1 point: Very bad (2)
◎: 6 points or more ○: 4 points or more and less than 6 points Δ: 3 points or more and less than 4 points ×: Less than 3 points <Wrinkle concealment effect>
Similar to the evaluation of skin stickiness, sensory evaluation was performed 4 hours after application by 10 professional panelists, and the following criteria were used.
◯: 8 or more felt good △: 4-7 felt good x: Fewer than 4 felt good

From the comparison of Table 2 and Table 3, in Comparative Examples 1 to 5, the results of judgment that all the Comparative Examples 1 to 5 are judged to be bad and the effect is greatly reduced, compared to the cases where the cosmetic effects are maintained. It was a result.

By applying the functional composite powder used in the present invention, it can be expected that printing and painting with different textures can be obtained not only in cosmetics but also in ink and paint technologies.

Claims (11)

A composite functional powder having a light transmitting property and a diffuse reflecting property is improved by coating a light-transmitting organic polymer powder having a specific shape with a plate-like inorganic powder and a water-soluble polymer. Cosmetics containing -25% by weight. The cosmetic according to claim 1, wherein the light-transmitting organic polymer has a spherical shape, a spindle shape, a hemispherical shape, a convex lens shape, or a rugby ball shape. The cosmetic according to claim 1 or 2, wherein the light-transmitting organic polymer powder has a convex lens shape. The cosmetic according to claims 1 to 3, wherein the light-transmissive organic polymer powder has an average particle size of 1 to 50 µm. The cosmetic according to claims 1 to 4, wherein the light-transmitting organic polymer powder is cross-linked polymethyl methacrylate. The plate-like inorganic powder is one or more selected from metal oxides, metal hydroxides, metal oxides or metal hydroxide hydrates, inorganic salts, and composites thereof. Cosmetics according to claims 1-5. The cosmetic according to any one of claims 1 to 6, wherein the refractive index of the plate-like inorganic powder is 2.3 or less. One or more inorganic powders selected from silica, alumina, zirconia, sericite, zinc oxide, talc, mica, aluminum hydroxide, hydroxyapatite, boron nitride, calcium carbonate, magnesium fluoride, and barium sulfate The cosmetic according to claim 1, which is a product. The cosmetic according to any one of claims 1 to 8, wherein the inorganic powder is plate-like silica. The components of the water-soluble polymer are hyaluronic acid and its salts or derivatives, acidic mucopolysaccharide, collagen and its derivatives, proteoglycan and its derivatives, phosphorylcholine / acrylic derivative copolymer, carboxyl vinyl polymer, carboxyl methyl cellulose, carboxyl ethyl cellulose, methyl cellulose The cosmetic according to claim 1, wherein the cosmetic is one or more selected from ethylcellulose, xanthan gum, alginate, glucan, carrageenan, quince seed gum, pectin, guar gum, starch, chitin, and chitosan. The cosmetic composition according to claim 1, wherein the component of the water-soluble polymer is 2-methacryloyloxyethyl phosphorylcholine / methacrylbutyl copolymer.