JP5388330B2 - Oil-encapsulated powder and cosmetics containing the same - Google Patents

Description

  The present invention relates to a cosmetic powder and a cosmetic containing the powder.

  It is important to conceal skin problems such as wrinkles, spots and dullness, and to give a natural makeup finish without giving the impression of so-called thick coating, which is important for cosmetics, especially makeup cosmetics. Role. By controlling the optical properties of the cosmetic film without relying on the hiding power of titanium dioxide, by changing the behavior of light that passes through the cosmetic film on the skin, is reflected from the skin, and passes through the cosmetic film again Many attempts have been made to obtain cosmetics having a desired function.

A porous powder encapsulates an inorganic compound having UV-absorbing ability to improve the feeling of use and safety (Patent Document 1), or a spherical powder or a plate-like powder whose surface is treated with fine particles (Non-Patent Document 1) Cosmetic powders composed of multiple layers of substances having different refractive indexes (Patent Documents 2 and 3), powders with continuously changing the refractive index inside the particles (Patent Document 4), etc. Wrinkles, spots, dull skin, etc. with a natural finish without a thick coating due to the so-called soft focus effect that increases the diffusibility of light passing through the membrane and reduces the straight transmittance while maintaining the total transmittance Attempts have been made to obtain cosmetics that can cover troubles.

However, in these technologies, the composition of the powder used is not uniform, and an uneven distribution of the refractive index occurs from a microscopic viewpoint. Therefore, backscattering occurs when light enters the decorative film. Therefore, energy loss of incident light occurs, and as a result, the intensity of light diffusion decreases, and the brightness of the skin decreases, resulting in a strong matte feeling, possibly giving an artificial impression. there were. Therefore, there has been a demand for a technique that can effectively cover skin troubles such as wrinkles, blemishes, dullness and the like while providing both a high diffusion effect and diffused light intensity and a natural and bright finish.

In addition, attempts have been made to encapsulate an oil agent or the like in the outer shell of a polymer and mix it with cosmetics (Patent Documents 5, 6, 7, and 8). However, these techniques adjust the strength of the capsule wall. By enlarging the capsule particle size, the capsule is collapsed at the time of use so as to exert the function of the encapsulated substance.
When a non-destructive composite powder containing a specific amount of a liquid oil agent having a specific refractive index is made into a thin film, it is excellent in light diffusibility and maintains its diffusion strength. It has not been known at all that when it is contained in a cosmetic, a cosmetic that gives a natural and bright finish can be obtained.

Naoki Nakamura et.al.l4th IFSCC Congress 51-63 (1986) Barcerona, Spain JP 2005-53846 A WO98 / 11865 JP-A-2005-162615 JP 2001-199839 A JP 59-73530 JP 2000-302662 A JP 08-40828 JP-A-2005-664460

This invention is made | formed against the background of such a situation, and makes it a subject to provide the powder for cosmetics with a high diffusion effect and the intensity | strength of diffused light.

In view of such a situation, the present inventors provide a cosmetic that can effectively cover skin troubles such as wrinkles, blemishes, dullness and the like while giving a natural and bright finish with a high diffusion effect and diffused light intensity. Therefore, as a result of earnest research efforts to find a powder for cosmetics with high diffused light intensity, when the thin film is measured, the light receiving angle with respect to 45 ° incident angle is 0 ° to 40 ° at 10 ° intervals. Powder having a total gloss value of 15 or more and a gloss value of 45 ° for a light receiving angle of 45 °, particularly capsule-shaped powder having voids inside and completely blocked from the outside by a continuous outer shell A non-destructive composite powder in which a liquid oil agent having a specific refractive index is filled in the voids of the liquid diffuses light well and contains the powder, so that a desired cosmetic can be obtained. And found that the present invention was completed . That is, the present invention is as follows.
(1) A non-destructive composite powder composed of capsule-like particles in which an oil agent is encapsulated in a void completely cut off from the outside by a continuous outer shell,
The outer shell is composed of a polymer obtained from a polymerizable component essential to one or more selected from (meth) acrylic acid ester,
The oil agent is liquid at 20 ° C. and one atmospheric pressure, and has a refractive index of 1.45 or more, and the ratio of the oil agent to the powder is 10 to 50% by mass,
When the plane formed using the composite is measured, the sum of the gloss values at intervals of 10 ° from 10 ° to 40 ° with respect to 45 ° incident light is 15 or more, and the gloss is 45 °. Powder having a value of 10 or less.
(2) The powder according to (1), wherein the polymer is obtained from a polymerizable component containing 80 to 100% by weight of a (meth) acrylic acid ester and 0 to 20% by weight of a polyfunctional vinyl monomer. body.
(3) The powder according to (2), wherein the polyfunctional vinyl monomer is 1 to 10% by weight of the polymerizable component.
(4) A cosmetic comprising the powder according to any one of (1) to (3).
(5) The method for producing a powder according to any one of (1) to (3), wherein the oil agent is liquid at 20 ° C. and one atmospheric pressure and has a refractive index of 1.45 or more and (meth) acrylic acid ester A method for producing a powder, comprising a step of polymerizing in an aqueous dispersion medium in which one or two or more polymerizable components selected from the above are dispersed.
(6) A powder is used to form a flat surface, and a gloss value is obtained by changing a light reception angle of 10 ° to 45 ° with respect to 45 ° incident light. Comparison of gross values of light receiving angles of less than ° is performed, and the sum of gross values at intervals of 10 ° of light receiving angles of 10 ° to 40 ° with respect to 45 ° incident light is 15 or more. A method for producing a cosmetic, characterized in that a powder having a value of 10 or less is selected and contained in 1 to 80% by mass of the cosmetic .
The powder is
A non-destructive composite powder composed of capsule-like particles in which an oil agent is encapsulated in a gap completely cut off from the outside by a continuous outer shell,
The outer shell is composed of a polymer obtained from a polymerizable component essential to one or more selected from (meth) acrylic acid ester,
The method for producing cosmetics, wherein the oil is liquid at 20 ° C. and one atmospheric pressure, has a refractive index of 1.45 or more, and the ratio of the oil to the powder is 10 to 50% by mass.

ADVANTAGE OF THE INVENTION According to this invention, the powder for cosmetics with a high diffusion effect and the intensity | strength of diffused light can be provided.

(1) Powder of powder present invention of the present invention in the case of measuring the thin film, and a 45 ° total gross values at 10 ° intervals to the light receiving angle 0 ° to 40 ° to the incident light is 15 or more, the light-receiving The gloss value at an angle of 45 ° is 10 or less. By having such characteristics, light is diffused well and its intensity is maintained. The gloss value can be measured, for example, by using a gloss meter such as VGS manufactured by Nippon Denshoku Industries Co., Ltd. after forming a thin film on a slide glass. After calibration with the attached standard plate having a specific gloss value, the measurement is performed by measuring the gloss value at a specific light receiving angle with respect to a constant incident light. Generally, with respect to 45 ° incident light, the gloss value at a light receiving angle of 0 to 70 ° is measured in increments of 10 °.

The powder having such characteristics can be prepared by enclosing a transparent liquid component having a different refractive index, for example, a transparent oil or fat, in the hollow portion of the powder having a hollow structure having a transparent outer shell. The desired powder can be obtained by adjusting the refractive index of the outer shell and the refractive index of the encapsulated liquid component. That is, the powder of the present invention is an oil agent having a refractive index of 1.45 or more, which is liquid at 20 ° C. and 1 atm in the voids of capsule-shaped particles having voids completely separated from the outside by a continuous outer shell. It is preferably a non-destructive powder encapsulating. The voids of the capsule-like particles may be a plurality of independent voids or a single continuous void. However, in order to reduce the scattered light and increase the diffused light, the capsule-like particles are a single continuous void. It is preferable.

Preferred examples of the substance constituting the outer shell of the powder of the present invention include inorganic compounds such as silica, alumina and calcium silicate, and polymers such as acrylic resin, polyethylene and polyamide. The polymer is preferably a polymer obtained from a polymerizable component essentially comprising one or two or more monomers selected from (meth) acrylic acid esters because of its high light transmittance. More preferably, it is a polymer obtained from a polymerizable component containing a (meth) acrylic acid ester and a polyfunctional vinyl monomer. Examples of (meth) acrylic acid esters include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, and the like. Examples of the polyfunctional vinyl monomers include aromatic crosslinking agents such as divinylbenzene, acrylic crosslinking agents such as (poly) ethylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, and the like. From the viewpoint of properties, an acrylic crosslinking agent is preferred.
The polymerizable component that is a raw material for the polymer forming the outer shell is mainly composed of 80 to 100% by weight of the (meth) acrylic acid ester and 0 to 20% by weight of the polyfunctional vinyl monomer. Here, if the polyfunctional vinyl monomer exceeds 20% by weight, sufficient transparency may not be obtained, and the intended physical properties may not be obtained. Therefore, it is preferably used at 1 to 10% by weight.

  Squalane, α-olefin oligomer, diphenyldimethicone, olive oil, almond oil, corn oil and the like are suitable as the oil agent contained in the powder of the present invention that is liquid at 20 ° C. and one atmospheric pressure and has a refractive index of 1.45 or more. It can be illustrated. The ratio of the oil agent contained in the powder of the present invention at 20 ° C. and one atmospheric pressure and having a refractive index of 1.45 or more with respect to the total composite powder is 10 to 50% by mass, preferably 15 to 45% by mass, More preferably, it is 20-40 mass%. If the amount of the oil agent is too small, scattering occurs when light passes through the thin film formed by the powder, and the intensity of the diffused light may decrease, which is not preferable. On the other hand, if the amount of inclusion is too large, the strength of the powder is lowered, it becomes destructible, the oil agent oozes out of the powder, and the effect of the present invention may not be exhibited, which is not preferable.

The particle diameter measured by the laser diffraction particle size distribution measuring method of the powder of the present invention is 1 to 20 microns, preferably 3 to 15 microns. If the particle system is too small, scattering occurs and the effect may not be exhibited, which is not preferable. If it is too large, it may be uncomfortable when used, which is not preferable.

The method for producing the powder of the present invention is not particularly limited. For example, when the substance constituting the capsule-like powder is a polymer, the following method can be exemplified.
1) After emulsifying an oil phase in which an oil agent to be encapsulated, a polymerizable component which is a starting material of a polymer constituting a capsule shell and a polymerization initiator are mixed, into an aqueous phase to form an emulsion, the polymerizable component including a monomer is polymerized. To obtain the desired composite powder.
2) An oil phase mixed with an encapsulating oil agent, a polymer constituting the capsule shell, and a solvent capable of dissolving both is emulsified in an aqueous phase to form an emulsion, and then the solvent is removed by evaporation to obtain the desired composite powder. Method.
Among these production methods, since a powder having a more uniform composition is obtained, it is preferable to adopt the method 1).
Here, water is usually used as the aqueous phase medium, but an organic solvent soluble in water such as alcohol may be mixed in the aqueous medium. When dispersing the polymerizable component as described above in an aqueous medium, an emulsifier, a dispersion stabilizer and the like can be used. Examples of emulsifiers include alkylbenzene sulfonates such as sodium dodecylbenzenesulfonate, polyethylene glycol alkyl ethers such as polyethylene glycol nonylphenyl ether, and reactive groups such as vinyl, acryloyl and allyl groups. And reactive emulsifiers. Examples of the dispersion stabilizer include water-soluble polymer compounds such as polyvinyl alcohol and polyacrylate and colloidal silica. These emulsifiers and dispersion stabilizers are usually used in an amount of 0.1 to 10 parts by weight with respect to 100 parts by weight of the polymerizable component. The oil phase is usually dispersed in the aqueous phase using a dispersing device such as a homomixer. Reaction initiators that can be used here include azo compounds such as azobisisobutyronitrile, organic peroxides such as benzoyl peroxide and lauroyl peroxide, and persulfates such as potassium persulfate and ammonium persulfate. Mention may be made of salts. Such a reaction initiator is usually used in an amount of 0.1 to 5 parts by weight with respect to 100 parts by weight of the polymerizable component.
When polymerizing the polymerizable component dispersed in the aqueous medium as described above, it is preferable to purge the inside of the reaction vessel with an inert gas such as nitrogen gas. After purging the inside of the reaction vessel with an inert gas in this way, the polymerization reaction proceeds by heating the temperature of the reaction solution to 60 to 80 ° C. Under the reaction conditions as described above, the reaction time required to produce the polymer forming the outer shell is usually 5 to 8 hours.
The reaction solution obtained as described above separates particles generated by filtration, centrifugation, etc., and further performs washing to remove emulsifiers, dispersion stabilizers, residual monomers, etc., followed by drying and grinding steps After that, a cosmetic fine particle powder is obtained.
The powder thus obtained forms a flat surface only with the powder, changes the light-receiving angle from 10 ° to 45 ° with respect to 45 ° incident light, determines the gloss value, and obtains the 45 ° light-receiving angle. Is compared with the sum of gloss values of light receiving angles of less than 45 °, and a powder having a significantly small gloss value of 45 ° light receiving angle is selected to obtain the cosmetic powder of the present invention. Specifically, in the formation of a flat surface, a thin film of powder is formed on a flat support using an adhesive or the like, and incident light of 45 ° is irradiated on the thin film, and 10 ° to 45 °. While appropriately changing the light receiving angle up to °, for example, the gross value is measured every 10 ° from 10 ° to 40 °, summed up, and compared with the gross value at the light receiving angle of 45 °. It is preferable to select a powder having a significantly small gloss value. As specific numerical values, it is preferable that the sum of gloss values at intervals of 10 ° from a light receiving angle of 10 ° to 40 ° with respect to 45 ° incident light is 15 or more, and the gloss value at a light receiving angle of 45 ° is 10 or less. It can be illustrated.

(2) Cosmetics of the present invention The cosmetics of the present invention are non-destructive composite powders composed of capsule-like particles having voids that are completely shielded from the outside by a continuous outer wall. When the plane formed using the above is measured, the sum of the gloss values at intervals of 10 ° from the light receiving angle of 0 ° to 40 ° with respect to 45 ° incident light is 15 or more, and the gloss value at the light receiving angle of 45 ° is 10 or less. A certain powder , preferably encapsulated particles having a void that is completely isolated from the outside by a continuous outer wall, is encapsulated with an oil agent that is liquid at 20 ° C. and one atmospheric pressure and has a refractive index of 1.45 or more. Non-destructive particles obtained as an essential component. The content of such components in the entire cosmetic is 1 to 80% by mass, preferably 5 to 50% by mass, and more preferably 10 to 40% by mass. If the content is too small, the effect of the cosmetic of the present invention may not be exhibited, which is not preferable. Moreover, when there is too much content, the adhesiveness to skin will fall and the effect may not be continued, and it is unpreferable.

  The cosmetic of the present invention can contain optional components usually used in cosmetics in addition to the above-mentioned powder as an essential component, as long as the effects of the invention are not impaired. Such optional ingredients include, for example, macadamia nut oil, avocado oil, corn oil, olive oil, rapeseed oil, sesame oil, castor oil, safflower oil, cottonseed oil, jojoba oil, coconut oil, palm oil, liquid lanolin, hardened coconut oil, hardened Oil, molasses, hydrogenated castor oil, beeswax, candelilla wax, carnauba wax, botarou, lanolin, reduced lanolin, hard lanolin, jojoba oil, waxes, liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, petrolatum, micro Hydrocarbons such as crystallin wax, oleic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, higher fatty acids such as stearic acid, behenic acid, undecylenic acid, cetyl alcohol, stearyl alcohol, isostearyl High alcohols such as alcohol, behenyl alcohol, octyldodecanol, myristyl alcohol, cetostearyl alcohol, cetyl isooctanoate, isopropyl myristate, hexyldecyl isostearate, diisopropyl adipate, di-2-ethylhexyl sebacate, cetyl lactate, malic acid Diisostearyl, di-2-ethylhexanoic acid ethylene glycol, dicaprate neopentyl glycol, di-2-heptylundecanoic acid glycerin, tri-2-ethylhexanoic acid glycerin, tri-2-ethylhexanoic acid trimethylolpropane, tri Synthetic ester oils such as trimethylolpropane isostearate and pentane erythritol tetra-2-ethylhexanoate, dimethylpolysiloxane, methylphenylpolysiloxane Chain polysiloxanes such as xane and diphenylpolysiloxane, cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexanesiloxane, amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, Modified polysiloxanes such as fluorine-modified polysiloxanes, fatty acid soaps (sodium laurate, sodium palmitate, etc.), anionic surfactants such as potassium lauryl sulfate, alkyl sulfate triethanolamine ether, stearyltrimethylammonium chloride, benzalkonium chloride , Cationic surfactants such as laurylamine oxide, imidazoline-based amphoteric surfactants (2-cocoyl-2-imidazolinium hydroxide-1 -Carboxyethyloxy disodium salt, etc.), betaine surfactants (alkyl betaine, amide betaine, sulfobetaine, etc.), amphoteric surfactants such as acylmethyltaurine, sorbitan fatty acid esters (sorbitan monostearate, sesquiolein) Sorbitan acid), glycerin fatty acids (glyceryl monostearate, etc.), propylene glycol fatty acid esters (propylene glycol monostearate, etc.), hardened castor oil derivatives, glycerin alkyl ethers, POE sorbitan fatty acid esters (POE sorbitan monooleate) , Polyoxyethylene sorbitan monostearate, etc.), POE sorbite fatty acid esters (POE-sorbite monolaurate, etc.), POE glycerin fatty acid esters (POE-glycerin). Noisostearate, etc.), POE fatty acid esters (polyethylene glycol monooleate, POE distearate, etc.), POE alkyl ethers (POE2-octyldodecyl ether, etc.), POE alkyl phenyl ethers (POE nonylphenyl ether, etc.), Pluronic type , POE / POP alkyl ethers (POE / POP2-decyltetradecyl ether, etc.), Tetronics, POE castor oil / hardened castor oil derivatives (POE castor oil, POE hardened castor oil, etc.), sucrose fatty acid ester, alkyl Nonionic surfactants such as glucoside, polyethylene glycol, glycerin, 1,3-butylene glycol, erythritol, sorbitol, xylitol, maltitol, propylene glycol, dipropylene glycol Polyol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexylene glycol, 1,2-hexanediol, 1,2-octanediol and other polyhydric alcohols, sodium pyrrolidonecarboxylate, lactic acid , Moisturizing ingredients such as sodium lactate, guar gum, quince seed, carrageenan, galactan, gum arabic, pectin, mannan, starch, xanthan gum, curdlan, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose, chondroitin sulfate, dermatan sulfate , Glycogen, heparan sulfate, hyaluronic acid, sodium hyaluronate, tragacanth gum, keratan sulfate, chondroitin, mucoitin sulfate, hydroxyethyl guar gum, cal Boxymethyl guar gum, dextran, keratosulfuric acid, locust bean gum, succinoglucan, caronic acid, chitin, chitosan, carboxymethylchitin, agar, polyvinyl alcohol, polyvinylpyrrolidone, carboxyvinyl polymer, sodium polyacrylate, polyethylene glycol, bentonite Thickeners such as mica, talc, kaolin, synthetic mica, calcium carbonate, magnesium carbonate, silicic anhydride (silica), aluminum oxide, barium sulfate, etc. May be treated, bengara, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, bitumen, titanium oxide, zinc oxide inorganic pigments, surface may be treated, titanium mica, fish phosphorus foil, Pearls such as bismuth oxychloride are raked Red 202, Red 228, Red 226, Yellow 4, Blue 404, Yellow 5, Red 505, Red 230, Red 223, Orange 201, Red 213, Yellow 204 Organic dyes such as yellow 203, blue 1, green 201, purple 201, red 204, polyethylene powder, polymethyl methacrylate, nylon powder, organopolysiloxane elastomer, para-aminobenzoic acid Acid UV absorbers, anthranilic acid UV absorbers, salicylic acid UV absorbers, cinnamic acid UV absorbers, benzophenone UV absorbers, sugar UV absorbers, 2- (2'-hydroxy-5'-t -Octylphenyl) benzotriazole, UV absorbers such as 4-methoxy-4'-t-butyldibenzoylmethane, ethanol, Lower alcohols such as sopropanol, vitamin B or derivatives thereof, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 or derivative thereof, vitamin B such as vitamin B12, vitamin B15 or derivative thereof, α Preferred examples include vitamin E such as -tocopherol, β-tocopherol, γ-tocopherol, vitamin E acetate, vitamin D, vitamin H, pantothenic acid, panthetin, pyrroloquinoline quinone, and the like.

As the cosmetic of the present invention, the type to which it is applied is not particularly limited, but it is preferably applied to make-up cosmetics in the sense of efficiently expressing such effects. Among them, white powder, pressed powder, finished white powder, It is particularly preferable to apply to cosmetics applied to the outermost part such as powder foundation and two-way cake.

The cosmetic of the present invention can be produced by treating the above-mentioned powders and optional components, which are essential components, according to a conventional method. However, the powdery cosmetic is filled in a container such as an inner dish. When it is a powder cosmetic and the content of the composite powder, which is an essential component, is 20% by mass or more with respect to the entire cosmetic, a solvent is used in combination when the cosmetic is produced by a conventional method. It is preferable to use a so-called wet molding method in which a solvent such as a dish is filled and then the solvent is removed by evaporation. This is because, when the content of the composite powder, which is an essential component, is large, mixing in a wet state can disperse well in the cosmetic, and the effect of the cosmetic of the present invention can be exhibited more. In this case, as a method for producing the solid powder cosmetic, the powder component is coated with an oil agent, and further mixed with a solvent to form a slurry, which may then be filled in a container such as an inner dish, or the powder may be oiled. In coating, a solvent may be allowed to coexist to form a slurry, which may then be filled in a container such as a middle dish.

The solvent used in such a wet molding method is not particularly limited as long as it can be removed by evaporation after filling in a container such as an inner dish. However, organic solvents such as ethyl alcohol, isopropyl alcohol, and hexane, decamethylcyclopenta Preferable examples include volatile silicones such as siloxane and volatile hydrocarbons such as isoparaffin. The amount of the solvent used in the wet molding method is preferably in the range of 1/3 to 2/3 of the powdery cosmetic by volume ratio. If the amount of the solvent is too small, the viscosity of the mixture of the powder cosmetic and the solvent is too high, and the composite powder may not be dispersed well in the cosmetic, which is not preferable. On the other hand, if the amount of the solvent is too large, a sufficient amount of the powder cosmetic may not be filled in a container such as an inner dish.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, it cannot be overemphasized that this invention is not limited only to an Example.

<Example 1>
(Powder of the present invention)
The aqueous mixture was prepared by dissolving 2 g of Metrose (Shin-Etsu Chemical Co., Ltd .: 65SH-50) in 300 ml of ion-exchanged water and adding 0.1 g of dioctyl sodium sulfosuccinate.
The oil-based mixture was prepared by adding 1 g of lauroyl peroxide to 68.9 g of methyl methacrylate and 1.1 g of ethylene glycol dimethacrylate to prepare a homogeneous solution, and charging and mixing with 30 g of diphenyldimethicone in an autoclave.
Thereafter, the aqueous mixture was charged in an autoclave and stirred and mixed at 7000 rpm for 1 minute using a homomixer to obtain an O / W type emulsion. This emulsion was heated at 65 ° C. for 5 hours with stirring under an initial pressure of 0.2 MPa after nitrogen substitution, and the polymerizable component was reacted. After the temperature was lowered to room temperature, the reaction product was filtered and washed with pure water to obtain powder 1.
The average particle diameter of this powder measured by the laser diffraction particle size distribution measurement method was 7 mm, and the inclusion rate of diphenyldimethicone was 30% by mass.

<Example 2>
The aqueous mixture was prepared by adding 30 g of colloidal silica having a solid content of 20%, 1 g of diethanolamine-adipic acid condensate and 300 ml of ion-exchanged water, and mixing them.
The oil-based mixture was prepared by adding 1 g of lauroyl peroxide to 78.8 g of methyl methacrylate and 1.2 g of ethylene glycol dimethacrylate to prepare a homogeneous solution, and charging the autoclave together with 20 g of squalane.
The aqueous mixture and oil mixture were dispersed and reacted in the same manner as in Example 1 to obtain powder 2. The average particle diameter of this powder measured by the laser diffraction particle size distribution measurement method was 7 mm, and the inclusion ratio of squalane was 20% by mass.

<Examples 3 to 5>

In the same manner as in Example 2, the amount of monomer used and the amount of squalane were changed to prepare powders 3 to 5 of the present invention having different filling rates. Table 1 shows the amount of monomer used for preparation of each powder, the amount of squalane and the filling rate. The average particle diameters of the powders 3 to 5 measured by the laser diffraction particle size distribution measuring method were all 7 mm.

<Comparative Example 1>
Spherical powder 6 was prepared according to Example 1 of WO 98/11865.

<Comparative example 2>
Spherical powder 7 was prepared according to Example 1 of JP-A-2001-199839.

<Test Example 1> (Evaluation of light diffusibility)
Powders 1 to 5 of Examples 1 to 5, spherical powders 6 and 7 of Comparative Examples 1 and 2, commercially available spherical silica (silica microbead P-1500 made by Catalytic Chemical), spherical acryllium beads (made by Matsumoto Yushi Seiyaku) The light diffusivity when the microsphere M330) was a thin film was evaluated. After applying an acrylic polymer emulsion having adhesiveness to a slide glass, 0.5 g of each powder was sprayed, and an excessive amount of powder was removed with a brush to obtain a measurement sample.

  A gloss meter (Nippon Denshoku Industries Co., Ltd. VGS) was used for the measurement, and the gloss value of 45 ° incident 45 ° received light was calibrated to 84.0 using the attached standard plate, and then 45 Gloss values in increments of 10 ° at a light receiving angle of 45 ° and 0 to 70 ° when light was incident at 0 ° were measured. Table 2 shows the results of obtaining the total gloss value ΣG at the light receiving angle of 0 to 40 ° and the gloss value at the light receiving angle of 45 °. The relationship between the light receiving angle and the gloss value is shown in FIG.

From Table 2, the powders (1 to 5) of the present invention have a higher ΣG value than that of conventional diffusion powders and commercially available diffusion powders (spherical silica, spherical acrylic resin), that is, strong diffused light even at a low angle. It can be seen that Therefore, it can also be seen that the intensity of diffused light is high while maintaining diffusibility as compared with conventional diffusion powders and commercially available diffusion powders. FIG. 1 also shows this characteristic. It can also be seen that this effect is significant when the filling amount of the oil in the powder of the present invention is 10% by mass or more. That is, the powder for cosmetics of the present invention is filled with 10 to 30% by mass of an oil agent based on the total mass of the powder, with alkyl (meth) acrylate, preferably methyl methacrylate and ethylene glycol dimethacrylate as the outer shell. It can be expressed as powder.

<Examples 6 to 9><Comparative Examples 3 to 4>

  A powder foundation was prepared according to the formulation shown below. That is, the components in Table 3 (A) were mixed with a Henschel mixer and then pulverized with a pulverizer. Thereafter, the component (B) was added while stirring the mixture again with a Henschel mixer, and mixing was continued. The mixture taken out from the Henschel mixer was press-filled into an intermediate dish to obtain a powder foundation. The numbers in Table 3 indicate parts by weight.

<Test Example 2> (Light diffusibility of cosmetic thin film)
The light diffusibility when the powder foundations of Examples 6 to 10 and Comparative Examples 3 to 4 were thin films was evaluated. After applying an acrylic polymer emulsion having adhesiveness to a slide glass, 0.5 g of each powder foundation was sprayed, and an excessive amount of powder was removed with a brush to obtain a measurement sample. The light diffusivity of this measurement sample was evaluated according to the method of Test Example 1. The results are shown in Table 4.

<Test Example 3> (Evaluation of cosmetic finish of powder foundation)
The cosmetic finish when the powder foundations of Examples 6 to 10 and Comparative Examples 3 to 4 were applied to the skin was evaluated. That is, the powder foundations of Examples 6 to 10 and Comparative Examples 3 to 4 were applied to the face of a female panelist, and each of the scores of Comparative Example 3 was set to 3 points from the following viewpoints by five skilled evaluators. A score of 6 to 10 was evaluated in 5 stages, and an average score of 5 people was used as a score. The results are shown in Table 5. The meaning of the score is as follows.

Evaluation items Bare skin feeling, spots, dullness covering power, skin brightness
Significance of the score Compared to the comparative example, 5 points were given as excellent, 4 points were given as superior, 2 points were inferior at 3 points, and 1 point was shown as being inferior.

From the results of Tables 4 and 5, it can be seen that the thin film of the cosmetic of the present invention has a high intensity of diffused light at a low angle as compared with the conventional diffused powder-containing cosmetic. In addition, when applied on the skin due to this thin film property, it can be seen that a natural finish that raises skin brightness with a non-artificial skin feeling can be achieved while covering skin troubles such as blotches and dullness. Moreover, it turns out that this effect is remarkable with the cosmetics using the powder whose filling amount of an oil agent is 10 mass% or more.
<Examples 11 to 14>

A powder foundation was prepared according to the formulation shown below. That is, the components in Table 6 (A) were mixed with a Henschel mixer and then pulverized with a pulverizer. Thereafter, the component (B) was added while stirring the mixture again with a Henschel mixer, and mixing was continued. The mixture taken out from the Henschel mixer was filled in an intermediate dish, and in Examples 13 and 14, isoparaffin was removed under reduced pressure conditions to obtain a powder foundation. The numbers in Table 6 indicate parts by weight. The finish when these powder foundations were applied on the skin was evaluated according to Test Example 3. The results are shown in Table 7.

From the results of Table 7, in the cosmetic of the present invention, when the content of the powder that is an essential component is 20% by mass or more, in order to obtain a natural finish with a non-artificial skin feeling, the skin brightness is increased. It can be seen that a so-called wet molding method is preferable.
<Examples 15 to 17><Comparative Examples 5 to 6>

An emulsified foundation was prepared according to the formulation shown below. That is, the ingredients in Table 8 (A) were mixed with stirring and heated to 80 ° C. While maintaining the temperature, (B) was dispersed therein with a disper. While maintaining the temperature, (C) was added and emulsified with stirring, and cooled to obtain an emulsified foundation. The numbers in Table 8 indicate parts by weight. The finish when these emulsified foundations were applied on the skin was evaluated according to Test Example 3 with each score of Comparative Example 5 being 3 points. The results are shown in Table 9.

From the results in Table 9, it can be seen that the cosmetic of the present invention exhibits excellent effects even when applied to cosmetics other than powder cosmetics.

Cosmetics It can be effectively used especially for makeup cosmetics.

It is a figure which shows the relationship between a light reception angle and a gloss value.

Claims (6)

A non-destructive composite powder composed of capsule-like particles in which an oil agent is encapsulated in a gap completely cut off from the outside by a continuous outer shell,
The outer shell is composed of a polymer obtained from a polymerizable component essential to one or more selected from (meth) acrylic acid ester,
The oil agent is liquid at 20 ° C. and one atmospheric pressure, and has a refractive index of 1.45 or more, and the ratio of the oil agent to the powder is 10 to 50% by mass,
When the plane formed using the composite powder is measured, the sum of the gloss values at intervals of 10 ° from 10 ° to 40 ° with respect to 45 ° incident light is 15 or more, and the light receiving angle is 45 °. A powder having a gloss value of 10 or less. The powder according to claim 1, wherein the polymer is obtained from a polymerizable component containing 80 to 100% by weight of a (meth) acrylic acid ester and 0 to 20% by weight of a polyfunctional vinyl monomer. The powder according to claim 2, wherein the polyfunctional vinyl monomer is 1 to 10% by weight of the polymerizable component. Cosmetics containing the powder according to any one of claims 1 to 3 . It is a manufacturing method of the powder given in any 1 paragraph of Claims 1-3 , Comprising: One kind chosen from oil and liquid (reflective index 1.45 or more) and (meth) acrylic acid ester at 20 ° C and one atmospheric pressure Or the manufacturing method of powder including the process of superposing | polymerizing in the aqueous dispersion medium which disperse | distributed 2 or more types of polymeric components essential. Using powder, a flat surface is formed, and the gloss value is obtained by changing the light receiving angle from 10 ° to 45 ° with respect to 45 ° incident light. The gross value of the 45 ° light receiving angle is less than 45 °. The sum of the gross values of the light receiving angles is compared, and the sum of the gross values at intervals of 10 ° from the light receiving angles of 10 ° to 40 ° with respect to the 45 ° incident light is 15 or more, and the gross value at the light receiving angle of 45 ° is 10 It is a method for producing a cosmetic, characterized by selecting a powder that is the following and containing it in 1 to 80% by mass of the cosmetic ,
The powder is
A non-destructive composite powder composed of capsule-like particles in which an oil agent is encapsulated in a gap completely cut off from the outside by a continuous outer shell,
The outer shell is composed of a polymer obtained from a polymerizable component essential to one or more selected from (meth) acrylic acid ester,
The method for producing cosmetics, wherein the oil is liquid at 20 ° C. and one atmospheric pressure, has a refractive index of 1.45 or more, and the ratio of the oil to the powder is 10 to 50% by mass.

Images