JP2011079804A - Pigment-encapsulating microcapsule and cosmetic obtained by formulating the same - Google Patents

Abstract

[PROBLEMS] To provide a cosmetic capable of adjusting a desired color development and gradation pattern by changing the method and strength of application to the skin.
(A) Mannitol (b) Hydrogenated lecithin (c) Polymethyl methacrylate (d) Cellulose (e) Shellac In combination of three or more substances having different hardness and water solubility, The time required for the double layer microcapsules to disintegrate on the skin can be delayed, and the color development and gradation pattern can be adjusted by changing the method and strength of application to the skin.
[Selection figure] None

Description

    The present invention includes (a) mannitol, (b) hydrogenated lecithin, (c) polymethyl methacrylate, (d) cellulose, and (e) pigment-encapsulated double-layer microcapsules made of three or more kinds. The present invention relates to a cosmetic that can adjust a desired color development and gradation pattern by changing the method and strength of application.

  Conventionally, adjusting a double layer microcapsule encapsulating a pigment is widely known in Japanese Patent Application Laid-Open No. 2003-514008. In addition, cosmetics containing these macrocapsules are used for cosmetics that, when applied to the skin, breaks the macrocapsules and releases the encapsulated color pigments, changing the coating color from the original appearance color. Has been.

  However, in cosmetics containing conventional microcapsules, the pigment-encapsulated capsules break immediately when applied, so there is an instant change of interest, but the color at the middle of the change or the gradation color. It was not possible to adjust.

  Therefore, as a result of intensive studies, the present inventor has found that (a) mannitol, (b) hydrogenated lecithin, (c) polymethyl methacrylate, (d) cellulose, (e) shellac, and three kinds of substances having different hardness and solubility in water. By combining the above, the time required for the pigment-encapsulated double-layer microcapsules to disintegrate on the skin can be delayed, and the color development and gradation pattern can be adjusted by changing the method and strength of application to the skin. I found out that I can do it.

  That is, the present invention includes (a) mannitol (b) hydrogenated lecithin (c) polymethyl methacrylate (d) cellulose (e) three or more pigment-encapsulated double-layer microcapsules selected from shellac. The present invention relates to a cosmetic that can adjust a desired color development and gradation pattern by changing the method and strength of application to the skin.

  As described above, pigment inclusion can be obtained by combining (a) mannitol (b) hydrogenated lecithin (c) polymethyl methacrylate (d) cellulose (e) shellac, materials having different hardness and solubility in water. It is possible to adjust the rate of disintegration when the double-layer microcapsules are applied to the skin, thereby changing the method and strength of application to the skin, thereby making it possible to adjust the color development and gradation pattern of your choice. It is clear that it is obtained. It is also possible to prepare a naturally-derived pigment-encapsulated double layer microcapsule by selecting at least three types selected from (a) mannitol (b) hydrogenated lecithin (c) cellulose (d) shellac. .

Hereinafter, the present invention will be described in detail.
In the present invention, the method for preparing the pigment-encapsulated double layer microcapsule includes: (a) mannitol (b) hydrogenated lecithin (c) polymethyl methacrylate (d) cellulose (e) shellac (e) A method of adjusting a slurry in which a pigment is dispersed in water while granulating using a spray dryer is desirable.

  The average particle size of the pigment-encapsulated double layer microcapsules can be adjusted to 10 to 500 μm, more preferably 50 to 150 μm, which is excellent in terms of touch and disintegration on the skin.

  The pigment-encapsulated double-layer microcapsule preferably contains a color pigment in the inner layer and a white pigment in the outer layer. As the pigment to be contained, a conventionally known pigment can be used, and its shape (spherical, rod-like, needle-like) Regardless of plate shape, irregular shape, scale shape, spindle shape, etc.), particle size (smoke, fine particles, pigment grade, etc.), particle structure (porous, nonporous, etc.) Examples thereof include inorganic powder, organic powder, surfactant metal salt powder, colored pigment, pearl pigment, and metal powder pigment.

  Specifically, as the inorganic powder, titanium oxide, zirconium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, talc, mica, kaolin, sericite, Muscovite, synthetic mica, phlogopite, saucite, biotite, lithia mica, silicic acid, anhydrous silicic acid, aluminum silicate, magnesium silicate, magnesium aluminum silicate, calcium silicate, barium silicate, strontium silicate, Metal tungstate, hydroxyapatite, vermiculite, hydrite, bentonite, montmorillonite, hectorite, zeolite, ceramic powder, dicalcium phosphate, alumina, aluminum hydroxide, boron nitride, boron nitride, silica, etc .; As machine powder, polyamide powder, polyester powder, polyethylene powder, polypropylene powder, silicone resin powder, silicone elastomer powder, polystyrene powder, polyurethane powder, benzoguanamine powder, polymethylbenzoguanamine powder, polytetrafluoroethylene powder, polymethyl methacrylate Powder, cellulose, silk powder, nylon powder, 12 nylon, 6 nylon, acrylic powder, acrylic elastomer, styrene / acrylic acid copolymer, divinylbenzene / styrene copolymer, vinyl resin, urea resin, phenol resin, fluororesin, Silicon resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, microcrystalline fiber powder, starch powder Lauroyl lysine, etc .; surfactant metal salt powder (metal soap) includes zinc stearate, aluminum stearate, calcium stearate, magnesium stearate, zinc myristate, magnesium myristate, zinc cetyl phosphate, calcium cetyl phosphate, cetyl phosphate Zinc sodium, etc .; As colored pigments, inorganic red pigments such as iron oxide, iron hydroxide and iron titanate, inorganic brown pigments such as γ-iron oxide, inorganic yellow pigments such as yellow iron oxide and loess, black iron oxide , Inorganic black pigments such as carbon black, inorganic purple pigments such as manganese violet and cobalt violet, inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide and cobalt titanate, inorganic blue pigments such as bitumen and ultramarine blue, fine particles Fine particles such as titanium oxide, fine particle cerium oxide, fine particle zinc oxide Powders, tar dyes raked, natural dyes raked, synthetic resin powders made by combining these powders, etc .; pearl pigments include titanium oxide-coated mica, titanium oxide-coated mica, Bismuth oxychloride, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, fish scale foil, titanium oxide-coated colored mica, and the like; Examples of the metal powder pigment include powders selected from aluminum powder, copper powder, stainless steel powder, and the like. Further, as tar pigments, Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228 , Red 230, red 401, red 505, yellow 4, yellow 5, yellow 202, yellow 203, yellow 204, yellow 401, blue 1, blue 2, blue 201, blue 404, Green No. 3, Green No. 201, Green No. 204, Green No. 205, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 206, Orange No. 207, etc .; , Pigments selected from calsamine, bradylin, crocin and the like.

These powders may or may not have been subjected to conventionally known surface treatments. Preferred examples include hydrophobic surface treatments such as methyl hydrogen polysiloxane treatment, silicone resin treatment, silicone gum treatment, and acrylic silicone treatment. , Organosiloxane treatment such as fluorinated silicone treatment, metal soap treatment such as zinc stearate, acylated amino acid metal salt treatment, silane coupling agent treatment, silane treatment such as alkylsilane treatment, organic titanate treatment, organic aluminate treatment, Perfluoroalkyl silane, perfluoroalkyl phosphate ester salt, fluorine compound treatment such as perfluoropolyether treatment, amino acid treatment such as N-lauroyl-L-lysine treatment, oil agent treatment such as squalane treatment or alkyl acrylate treatment Ak Le process is like, it is possible to use a combination of one or more thereof. Hydrophilic surface treatment is also preferable, and examples thereof include agar treatment, deoxyribonucleic acid treatment, lecithin treatment, polyacrylic acid treatment, silica treatment, alumina treatment or zirconia treatment, particularly preferably cellulose treatment. Can be used in combination.

  In the cosmetic of the present invention, in addition to the above-described treated pigment, various materials used in the cosmetic, such as pigments, ultraviolet absorbers, oils, surfactants, fluorine compounds, resins, stickers, preservatives, perfumes, Components such as humectants, salts, solvents, antioxidants, chelating agents, neutralizing agents, pH adjusting agents, insect repellents, and physiologically active ingredients can be used.

  The cosmetics of the present invention include various cosmetics such as makeup cosmetics, basic cosmetics, hair cosmetics, fragrances, body cosmetics, etc., especially foundations, blushers, white powders, face powders, lipsticks, eye shadows. Suitable for eyebrow, mascara, nail color, body powder, sunscreen and deodorant.

  As a form of the dressing of the present invention, any dosage form such as powder, emulsion, cream, stick, solid, spray, multilayer separation type may be used, but water is blended. The formulation is desirable in terms of disintegration of the pigment-encapsulated double layer microcapsules.

The present invention will be described in more detail with reference to examples below, but the present invention is not limited thereto.

(Production Example 1: Example of production of iron oxide / chromium oxide-encapsulated double layer microcapsules)
First, as an inner layer part, 30 parts by mass of an iron oxide / chromium oxide mixture, 27.0 parts by mass of mannitol, 3.75 parts by mass of hydrogenated lecithin, 2.75 parts by mass of polymethyl methacrylate and 100 parts by mass of purified water were mixed and stirred. And granulated with a spray dryer. Subsequently, this inner layer part, 30 parts by mass of titanium oxide, 3.75 parts by mass of hydrogenated lecithin, 2.75 parts by mass of polymethyl methacrylate were mixed and stirred with 200 parts by mass of purified water, and granulated with a spray dryer. An electron micrograph of the resulting pigment-encapsulated double layer microcapsule is shown in FIG.

(Production Example 2: Manganese violet inclusion double layer microcapsule production example)
First, 30 parts by mass of manganese violet, 25.5 parts by mass of mannitol, 3.75 parts by mass of hydrogenated lecithin and 3.5 parts by mass of shellac were mixed and stirred with 100 parts by mass of purified water, and granulated with a spray dryer. . Next, the inner layer part, 30 parts by mass of titanium oxide, 3.75 parts by mass of hydrogenated lecithin, and 3.5 parts by mass of shellac were mixed and stirred with 200 parts by mass of purified water, and granulated with a spray dryer. An electron micrograph of the obtained pigment-encapsulated double layer microcapsule is shown in FIG.

(Production Example 3: Production Example of Red Iron Oxide Encapsulated Double Layer Microcapsules)
First, as an inner layer part, 30 parts by mass of red iron oxide, 25.5 parts by mass of mannitol, 3.75 parts by mass of hydrogenated lecithin, and 3.5 parts by mass of cellulose are mixed and stirred with 100 parts by mass of purified water, and granulated with a spray dryer. did. Subsequently, the inner layer part, 30 parts by mass of titanium oxide, 3.75 parts by mass of hydrogenated lecithin, and 3.5 parts by mass of cellulose were mixed and stirred with 200 parts by mass of purified water, and granulated with a spray dryer. An electron micrograph of the obtained pigment-encapsulated double layer microcapsule is shown in FIG.

(Production Example 4: Yellow Iron Oxide Encapsulated Double Layer Microcapsule Production Example)
First, as an inner layer part, 30 parts by mass of yellow iron oxide, 25.5 parts by mass of mannitol, 3.75 parts by mass of hydrogenated lecithin, and 3.5 parts by mass of cellulose were mixed and stirred with 100 parts by mass of purified water, and granulated with a spray dryer. did. Subsequently, the inner layer part, 30 parts by mass of titanium oxide, 3.75 parts by mass of hydrogenated lecithin, and 3.5 parts by mass of cellulose were mixed and stirred with 200 parts by mass of purified water, and granulated with a spray dryer. An electron micrograph of the obtained pigment-encapsulated double layer microcapsule is shown in FIG.

(Production Example 5: Black iron oxide-encapsulating double layer microcapsule production example)
First, 30 parts by mass of black iron oxide, 25.5 parts by mass of mannitol, 3.75 parts by mass of hydrogenated lecithin, and 3.5 parts by mass of polymethyl methacrylate were mixed and stirred with 100 parts by mass of purified water as an inner layer, and a spray dryer. Granulated with. Subsequently, this inner layer part, 30 parts by mass of titanium oxide, 3.75 parts by mass of hydrogenated lecithin, and 3.5 parts by mass of polymethyl methacrylate were mixed and stirred with 300 parts by mass of purified water, and granulated with a spray dryer. An electron micrograph of the obtained pigment-encapsulated double layer microcapsule is shown in FIG.

(Production Comparative Example 1)
The polymethyl methacrylate inner layer 2.75 parts by mass and outer layer 2.75 parts by mass in Production Example 1 were changed to 2 parts by mass of the inner layer part and 2 parts by mass of the outer layer part, respectively, except that it was changed to 28.5 parts by mass of mannitol. In the same process, a pigment-encapsulated double layer microcapsule was obtained.

(Production Comparative Example 2)
The shellac inner layer part 3.5 parts by mass and outer layer part 3.5 parts by mass in Production Example 2 were changed to an inner layer part 2.75 parts by mass and an outer layer part 2.75 parts by mass, respectively, and mannitol was changed to 27.0 parts by mass. Except for the above, a pigment-encapsulated double layer microcapsule was obtained in the same process.

[Examples 1-2, Comparative Examples 1-2]
Production of aqueous eye shadow An aqueous eye shadow was obtained according to the formulation and production method shown in Table 1. The unit of the blending amount is mass%.

Manufacturing method The gel of component A is prepared. Disperse component B in component A and stir well. Component C and then D were added and stirred, and the resulting aqueous eye shadow was filled into a container to obtain a product.

  From the results shown in Table 1, the pigment-encapsulated double layer microcapsules blended in Examples 1 and 2 of the present invention are relatively hard, and the time required to disintegrate on the skin is slow. By changing the height, the gradation pattern could be adjusted. In Comparative Examples 1 and 2, since the pigment-encapsulated double layer microcapsule instantaneously collapses and discolors, the gradation pattern cannot be adjusted.

Example 3
A W / O type liquid foundation was produced according to the formulation and production method shown in Table 2. The unit of the blending amount is mass%.

  Component B was mixed well using a mixer. On the other hand, Component A was heated to 80 ° C. and mixed well so as to be uniform. To this, component B was gradually added with stirring and gradually cooled to 50 ° C. Next, Component C was heated to 80 ° C. and dissolved uniformly, and then slowly cooled to 50 ° C. Component C was added to component A under stirring, further stirred well, and cooled to room temperature. Component D was added and stirred, and the resulting solution was filled into a container to obtain a product.

    The obtained liquid foundation was able to adjust the disintegration property of the microcapsules by changing the method and strength of application to the skin and obtain the desired color development. In addition, it was possible to easily obtain a three-dimensional effect by producing a deep color on the face outline and a light color on the forehead and nose muscles.

Example 4
A W / O type solid blusher was prototyped according to the formulation and manufacturing method shown in Table 3. The unit of the blending amount is mass%.

Production Method Component A was heated to 80 ° C. and mixed well so as to be uniform. To this, component B is gradually added with stirring, then component C heated to 80 ° C. is added to component A with stirring, and further stirred, component D is added, stirred, and filled into a container. The product was obtained after cooling to room temperature.

    The obtained W / O type solid blusher was able to adjust the disintegration property of the microcapsules by changing the method and strength of application to the skin and obtain the desired color development. In addition, the gradation pattern could be easily adjusted by darkening only the high cheeks.

Example 5
A lip gloss was produced according to the formulation and manufacturing method shown in Table 4. The unit of the blending amount is mass%.

Production Method Component A was mixed well at 80 ° C. After cooling to room temperature, component B was added under agitation and mixed well, component C was added and then filled into a container to obtain a product.

  The resulting lip gloss was able to adjust the disintegration property of the microcapsules by changing the method and strength of application to the skin and obtain the desired color development. In addition, it was possible to easily obtain a three-dimensional effect by developing a deep color at the lip contour and developing a light color at the center of the lip.

Example 6
A stick-shaped eye shadow was produced according to the formulation and manufacturing method shown in Table 5. The unit of the blending amount is mass%.

Production Method Component A was mixed well at 80 ° C. After cooling to room temperature, component B was added under agitation and mixed well, component C was added and then filled into a container to obtain a product.

  By changing the method and strength of applying the stick-shaped eye shadow to the skin, the disintegration property of the microcapsules was adjusted, and the desired color development could be obtained. In addition, by lightly applying to the eye hole part, the microcapsule is not collapsed and exhibits the same pearly white color as the appearance color. Collapsed and interference colors could be obtained.

  Example of scanning electron micrograph of iron oxide / chromium oxide encapsulated double layer microcapsule produced in Production Example 1   Example of Scanning Electron Microscope Photograph of Manganese Violet Encapsulating Double Layer Microcapsules Produced in Production Example 2   Example of scanning electron micrograph of red iron oxide-encapsulating double layer microcapsule produced in Production Example 3   Example of scanning electron micrograph of yellow iron oxide-encapsulating double layer microcapsule produced in Production Example 4   Example of scanning electron micrograph of black iron oxide-encapsulated double layer microcapsule produced in Production Example 5

Claims (5)

  Cosmetics that contain pigment-encapsulated double-layer microcapsules and can adjust the color development and gradation pattern by changing the method and strength of application to the skin.   2. A cosmetic comprising the pigment-encapsulated double layer microcapsule according to claim 1 comprising at least three types selected from the following. (A) Mannitol (b) Hydrogenated lecithin (c) Polymethyl methacrylate (d) Cellulose (e) Shellac   The pigment-encapsulated double layer microcapsule according to claim 1 is a natural-derived microcapsule comprising three or more kinds selected from the following. (A) Mannitol (b) Hydrogenated lecithin (c) Cellulose (d) Shellac 4. A cosmetic comprising the pigment-encapsulated double layer microcapsules according to claims 1 to 3 containing a color pigment as an inner layer and a white pigment as an outer layer.   The cosmetic according to claim 1, comprising an interference color pigment and a black pigment-encapsulating double layer microcapsule.

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