JP2013216590A - Particles for cosmetic, and cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new anti-suntan ingredient having anti-suntan effect like those including ultraviolet light absorber and ultraviolet light scattering agent, and to provide a cosmetic having anti-suntan effect.SOLUTION: The new anti-suntan ingredient consists of cosmetic particles to be used by adding to cosmetics, comprising a fluorescent substance and a transparent material; wherein, the fluorescent substance is preferably an organic fluorophor or rare earth metal complex, more preferably a rare earth metal complex, more preferably an europium complex; and the transparent material is preferably a transparent vinyl resin. A cosmetic containing a europium complex is also provided.

Description

  The present invention relates to cosmetic particles and cosmetics.

  The sunscreen cosmetics are intended to cut out the ultraviolet rays in the sun rays and protect the skin from the adverse effects of the ultraviolet rays. As the sunscreen components, ultraviolet absorbers and ultraviolet scattering agents are used, respectively. Examples of the ultraviolet absorber include octyl methoxycinnamate, octyl triazone, and t-butylmethoxydibenzoylmethane. Examples of the ultraviolet scattering agent include titanium oxide and zinc oxide. (For example, refer nonpatent literature 1.)

“What is the difference between Kao product Q & A UV absorbers and scattering agents?” [Online], [Search April 4, 2012], Internet <URL: http://www.kao.com/jp/qa_cate/ facesunscreen_04_02.html>

  While UV absorbers undergo chemical changes that change the molecular structure and absorb UV rays, the molecules break down and decompose, and some of the UV absorbers in the decomposed state are very reactive and irritate the skin It is said that it may be absorbed by the skin as a certain substance, and the UV scattering agent is said to be easily whitish because it is an inorganic white powder. This invention makes it a subject to provide the new sunscreen component which has the sunscreen effect similarly to these well-known sunscreen components, and the cosmetics with a sunscreen effect.

As a result of intensive studies to solve the above problems, the present inventors have found that by containing a fluorescent material, ultraviolet light can be converted into visible light in sunlight, and an ultraviolet absorption effect can be obtained by adding to cosmetics. The present inventors have found that it can be obtained, and that the effect of preventing sunburn can be maintained more stably by coating the fluorescent material with a transparent material.
The present invention relates to [1] cosmetic particles used by being added to cosmetics, the cosmetic particles including a fluorescent material and a transparent material.
The present invention also relates to [2] the cosmetic particle according to [1], wherein the fluorescent substance is an organic phosphor or a rare earth metal complex.
The present invention also relates to [3] cosmetic particles according to [1] or [2] above, wherein the fluorescent substance is a rare earth metal complex.
Moreover, this invention relates to the particle | grains for cosmetics of any one of said [1]-[3] whose said fluorescent substance is a europium complex.
Moreover, this invention relates to the particle | grains for cosmetics of any one of said [1]-[4] whose said transparent material is transparent resin.
Moreover, this invention relates to the particle | grains for cosmetics of any one of said [1]-[5] whose said transparent material is a transparent vinyl resin.
[7] The present invention also relates to the cosmetic particle according to any one of [1] to [6], wherein the transparent material is a transparent (meth) acrylic resin.
Moreover, the present invention provides [8] The above [1] to [1], wherein the cosmetic particles are resin particles obtained by emulsion polymerization or suspension polymerization of a vinyl monomer composition in which the fluorescent substance is dissolved or dispersed. [7] The cosmetic particles according to any one of [7].
Furthermore, the present invention relates to [9] a cosmetic containing the cosmetic particles according to any one of [1] to [8].
And this invention relates to the cosmetics containing a [10] europium complex.

  According to the present invention, ultraviolet rays in sunlight can be converted into visible light, the amount of ultraviolet rays can be reduced, and cosmetic particles having an anti-sun effect can be obtained by adding to cosmetics and an anti-sun effect. it can.

The schematic diagram for demonstrating the measuring method of ultraviolet intensity.

  The material used for the cosmetic of the present invention will be described below.

<Fluorescent substance>
The fluorescent substance used in the present invention can be appropriately selected according to the purpose. Specific examples of the fluorescent substance include organic fluorescent substances, inorganic fluorescent substances, and rare earth metal complexes. Among these, from the viewpoint of wavelength conversion efficiency for converting ultraviolet light into visible light (sunburn preventing effect in cosmetics with a fluorescent substance added), it is preferably at least one of organic phosphors and rare earth metal complexes. More preferably.

(Inorganic phosphor)
Examples of the inorganic phosphor include, for example, Y ₂ O ₂ S: Eu, Mg, Ti fluorescent particles, oxyfluoride crystallized glass containing Er ³⁺ ions, a compound composed of strontium oxide and aluminum oxide, and a rare earth element. Inorganic such as SrAl ₂ O ₄ : Eu, Dy, Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy, CaAl ₂ O ₄ : Eu, Dy, ZnS: Cu added with europium (Eu) and dysprosium (Dy) Mention may be made of fluorescent materials.

(Organic phosphor)
Examples of the organic phosphor include organic dyes such as cyanine dyes, pyridine dyes, rhodamine dyes, BASF Lumogen F Violet 570, Yellow083, Orange 240, Red300, and bases manufactured by Taoka Chemical Co., Ltd. And organic phosphors such as sexual dye Rhodamine B, Sumiplast Yellow FL7G manufactured by Sumika Finechem Co., Ltd., MACROLEX Fluorescent Red G manufactured by Bayer, and Yellow 10GN.

(Rare earth metal complex)
The metal constituting the rare earth metal complex is preferably at least one of europium and samarium, and more preferably europium, from the viewpoint of wavelength conversion efficiency.
The ligand constituting the rare earth metal complex is not particularly limited as long as it can coordinate to the rare earth metal, and can be appropriately selected according to the metal to be used. Among these, from the viewpoint of wavelength conversion efficiency, an organic ligand is preferable, and an organic ligand capable of forming a complex with at least one of europium and samarium is preferable.

In the present invention, the ligand is not limited, but is a neutral ligand, such as a nitrogen-containing organic compound, a nitrogen-containing aromatic heterocyclic compound, and a phosphine oxide, or an anionic ligand. And at least one selected from carboxylic acids and β-diketones.
In addition, as a ligand of the rare earth complex, a general formula R ₁ COCHR ₂ COR ₃ (wherein R ₁ represents an aryl group, an alkyl group, a cycloalkyl group, a cycloalkylalkyl group, an aralkyl group, or a substituent thereof, R ₂ Represents a hydrogen atom, an alkyl group, a cycloalkyl group, a cycloalkylalkyl group, an aralkyl group or an aryl group, and R ₃ represents an aryl group, an alkyl group, a cycloalkyl group, a cycloalkylalkyl group, an aralkyl group or a substituent thereof. (Beta) -diketone represented by this may be contained.

  Specific examples of β-diketones include acetylacetone, perfluoroacetylacetone, benzoyl-2-furanoylmethane, 1,3-di (3-pyridyl) -1,3-propanedione, benzoyltrifluoroacetone, and benzoylacetone. , 5-chlorosulfonyl-2-thenoyltrifluoroacetone, bis (4-bromobenzoyl) methane, dibenzoylmethane, d, d-dicamphorylmethane, 1,3-dicyano-1,3-propanedione, p- Bis (4,4,5,5,6,6,6-heptafluoro-1,3-hexanedinoyl) benzene, 4,4'-dimethoxydibenzoylmethane, 2,6-dimethyl-3,5-heptane Dione, dinaphthoylmethane, dipivaloylmethane, bis (perfluoro-2-propoxypropionyl) Tan, 1,3-di (2-thienyl) -1,3-propanedione, 3- (trifluoroacetyl) -d-camphor, 6,6,6-trifluoro-2,2-dimethyl-3,5 -Hexanedione, 1,1,1,2,2,6,6,7,7,7-decafluoro-3,5-heptanedione, 6,6,7,7,8,8,8-heptafluoro -2,2-dimethyl-3,5-octanedione, 2-furyltrifluoroacetone, hexafluoroacetylacetone, 3- (heptafluorobutyryl) -d-camphor, 4,4,5,5,6,6 6-heptafluoro-1- (2-thienyl) -1,3-hexanedione, 4-methoxydibenzoylmethane, 4-methoxybenzoyl-2-furanoylmethane, 6-methyl-2,4-heptanedione, 2 -Naphtoyl Trifluoroacetone, 2- (2-pyridyl) benzimidazole, 5,6-dihydroxy-1,10-phenanthroline, 1-phenyl-3-methyl-4-benzoyl-5-pyrazole, 1-phenyl-3-methyl- 4- (4-butylbenzoyl) -5-pyrazole, 1-phenyl-3-methyl-4-isobutyryl-5-pyrazole, 1-phenyl-3-methyl-4-trifluoroacetyl-5-pyrazole, 3- ( 5-phenyl-1,3,4-oxadiazol-2-yl) -2,4-pentanedione, 3-phenyl-2,4-pentanedione, 3- [3 ′, 5′-bis (phenylmethoxy) ) Phenyl] -1- (9-phenanthyl) -1-propane-1,3-dione, 5,5-dimethyl-1,1,1-trifluoro-2,4-hexanedi 1-phenyl-3- (2-thienyl) -1,3-propanedione, 3- (t-butylhydroxymethylene) -d-camphor, 1,1,1-trifluoro-2,4-pentanedione 1,1,1,2,2,3,3,7,8,8,9,9,9-tetradecafluoro-4,6-nonanedione, 2,2,6,6-tetramethyl- 3,5-heptanedione, 4,4,4-trifluoro-1- (2-naphthyl) -1,3-butanedione, 1,1,1-trifluoro-5,5-dimethyl-2,4-hexane Dione, 2,2,6,6-tetramethyl-3,5-heptanedione, 2,2,6,6-tetramethyl-3,5-octanedione, 2,2,6-trimethyl-3,5- Heptanedione, 2,2,7-trimethyl-3,5-octanedione, 4 4,4-trifluoro-1- (thienyl) -1,3-butanedione (TTA), 1- (pt-butylphenyl) -3- (N-methyl-3-pyrrole) -1,3-propane Dione (BMPP), 1- (pt-butylphenyl) -3- (p-methoxyphenyl) -1,3-propanedione (BMDBM), 1,3-diphenyl-1,3-propanedione, Ben Zoylacetone, dibenzoylacetone, diisobutyroylmethane, dibiparoylmethane, 3-methylpentane-2,4-dione, 2,2-dimethylpentane-3,5-dione, 2-methyl-1,3 -Butanedione, 1,3-butanedione, 3-phenyl-2,4-pentanedione, 1,1,1-trifluoro-2,4-pentanedione, 1,1,1-trifluoro-5,5-dimethyl- 2,4-hexanedione, 2,2,6,6-tetramethyl-3,5-heptanedione, 3-methyl-2,4-pentanedione, 2-acetylcyclopentanone, 2-acetylcyclohexanone, 1- Examples include heptafluoropropyl-3-tert-butyl-1,3-propanedione, 1,3-diphenyl-2-methyl-1,3-propanedione, 1-ethoxy-1,3-butanedione, and the like.

  Nitrogen-containing organic compounds, nitrogen-containing aromatic heterocyclic compounds, and phosphine oxides of neutral ligands of rare earth complexes include, for example, 1,10-phenanthroline, 2-2'-bipyridyl, 2-2'-6, 2 "-terpyridyl, 4,7-diphenyl-1,10-phenanthroline, 2- (2-pyridyl) benzimidazole, triphenylphosphine oxide, tri-n-butylphosphine oxide, tri-n-octylphosphine oxide, tri- Examples include n-butyl phosphate.

Among them, Eu (TTA) ₃ phen, Eu (BMPP) ₃ phen, and Eu (BMDBM) ₃ phen can be preferably used as the rare earth complex having the above-described ligand, from the viewpoint of wavelength conversion efficiency.
A method for producing Eu (TTA) ₃ Phen is described, for example, in Masa Mitsui, Shinji Kikuchi, Tokuji Miyashita, Yutaka Amano, J. et al. Mater. Chem. Reference may be made to the method disclosed in 2003, 13, 285-2879.

<Cosmetic particles and production method thereof>
In the present invention, the fluorescent substance is preferably used in the form of particles coated with a transparent material. The particles have a fluorescent material and a transparent material, and the transparent material usually contains the fluorescent material. The shape of the particles varies depending on the production method, but is preferably spherical from the viewpoint of dispersibility in cosmetics.

  The cosmetic particles of the present invention are coated with a transparent material to improve the stability such as moisture resistance, and when the rare earth metal complex having low moisture resistance is used with an expensive fluorescent substance, the utilization efficiency is maximized. Can be increased.

Moreover, although the magnitude | size of the particle | grains for cosmetics can be suitably selected according to the objective, when using for cosmetics, for example, it is preferable to set it as 0.1-1000 micrometers, and it is 0.1-200 micrometers. More preferred.
There is no restriction | limiting in particular as content of the fluorescent substance in the particle | grains for cosmetics of this invention, Although it can select suitably according to the objective and the kind of fluorescent substance, From a viewpoint of wavelength conversion efficiency, it is 0.001-1 mass%. It is preferable that it is 0.01 to 0.5% by mass.

(Transparent material)
In the present invention, the fluorescent substance is contained in a transparent material. In the present invention, “transparent” means that the transmittance of light having a wavelength of 400 to 800 nm at an optical path length of 1 cm is 90% or more.
The transparent material is not particularly limited as long as it is transparent, and examples thereof include resins such as acrylic resin, methacrylic resin, urethane resin, epoxy resin, polyester resin, polyethylene resin, and polyvinyl chloride resin. Among these, acrylic resins and methacrylic resins are preferable. Although there is no restriction | limiting in particular as a monomer compound which comprises the said resin, It is preferable that a vinyl compound is included at least.

  In addition, as a method of incorporating the fluorescent substance into the transparent material, the fluorescent substance is dissolved or dispersed in a monomer compound (monomer composition), and the solution is polymerized (bulk polymerization, suspension polymerization, emulsion polymerization, solution Polymerization), a casting method, a melting method, and the like. From the viewpoint of ease of post-treatment, suspension polymerization and emulsion polymerization are preferable. Furthermore, the resin composition can be pulverized and classified as necessary to obtain particles having a desired size.

(Vinyl compound)
In the present invention, the vinyl compound is not particularly limited as long as it is a compound having at least one ethylenically unsaturated bond, and an acrylic monomer, a methacrylic monomer, which can be converted into a vinyl resin, particularly an acrylic resin or a methacrylic resin when polymerized. (Meth) acrylic acid derivatives such as acrylic oligomers and methacrylic oligomers can be used without particular limitation. In the present invention, an acrylic monomer, a methacryl monomer, and the like are preferable.

  Preferred acrylic monomers and methacrylic monomers as (meth) acrylic acid derivatives include, for example, acrylic acid, methacrylic acid, and alkyl esters thereof, and in combination with other vinyl compounds that can be copolymerized therewith. It can also be used alone or in combination of two or more. Here, (meth) acrylic acid means acrylic acid, methacrylic acid or a mixture thereof.

  Examples of the alkyl acrylate ester and the alkyl methacrylate ester include, for example, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate. Acrylic acid unsubstituted alkyl ester and methacrylic acid unsubstituted alkyl ester; dicyclopentenyl (meth) acrylate; tetrahydrofurfuryl (meth) acrylate; benzyl (meth) acrylate; α, β-unsaturated carboxylic acid to polyhydric alcohol (For example, polyethylene glycol di (meth) acrylate (having 2 to 14 ethylene groups), trimethylolpropane di (meth) acrylate, trimethylolpropylene) N-tri (meth) acrylate, trimethylolpropane ethoxytri (meth) acrylate, trimethylolpropane propoxytri (meth) acrylate, tetramethylolmethanetri (meth) acrylate, tetramethylolmethanetetra (meth) acrylate, polypropylene glycol di (meth) Acrylate (having 2 to 14 propylene groups), dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, bisphenol A polyoxyethylene di (meth) acrylate, bisphenol A dioxyethylene di ( Meth) acrylate, bisphenol A trioxyethylene di (meth) acrylate, bisphenol A decaoxyethylene di (meth) acrylate, etc.); Compounds obtained by adding an α, β-unsaturated carboxylic acid to a group-containing compound (for example, trimethylolpropane triglycidyl ether triacrylate, bisphenol A diglycidyl ether diacrylate, etc.); a polyvalent carboxylic acid (for example, phthalic anhydride) Acid) and a substance having a hydroxyl group and an ethylenically unsaturated group (for example, β-hydroxyethyl (meth) acrylate); acrylic acid or alkyl ester of methacrylic acid (for example, (meth) acrylic acid methyl ester, ( (Meth) acrylic acid ethyl ester, (meth) acrylic acid butyl ester, (meth) acrylic acid 2-ethylhexyl ester); urethane (meth) acrylate (eg, tolylene diisocyanate and 2-hydroxyethyl (meth) acrylic ester) reaction A reaction product of trimethylhexamethylene diisocyanate, cyclohexanedimethanol and 2-hydroxyethyl (meth) acrylic acid ester, etc.]; an acrylic acid-substituted alkyl ester or a methacrylic acid in which a hydroxyl group, an epoxy group, a halogen group or the like is substituted on these alkyl groups Acid-substituted alkyl ester; and the like.

  Examples of other vinyl compounds that can be copolymerized with acrylic acid, methacrylic acid, alkyl acrylate ester, or alkyl methacrylate ester include acrylamide, acrylonitrile, diacetone acrylamide, styrene, vinyl toluene, and the like. These vinyl monomers can be used alone or in combination of two or more.

  The bifunctional or higher functional vinyl compound in the present invention is, for example, a compound obtained by reacting a polyhydric alcohol with an α, β-unsaturated carboxylic acid (for example, polyethylene glycol di (meth) acrylate (the number of ethylene groups is 2 ~ 14), ethylene glycol dimethacrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylolpropane ethoxytri (meth) acrylate, trimethylolpropane propoxytri (meth) acrylate, tetra Methylol methane tri (meth) acrylate, tetramethylol methane tetra (meth) acrylate, polypropylene glycol di (meth) acrylate (having 2 to 14 propylene groups), dipentaerythritol penta (meth) ) Acrylate, dipentaerythritol hexa (meth) acrylate, bisphenol A polyoxyethylene di (meth) acrylate, bisphenol A dioxyethylene di (meth) acrylate, bisphenol A trioxyethylene di (meth) acrylate, bisphenol A decaoxyethylene Di (meth) acrylate, etc.]; compounds obtained by adding an α, β-unsaturated carboxylic acid to a polyvalent glycidyl group-containing compound (for example, trimethylolpropane triglycidyl ether triacrylate, bisphenol A diglycidyl ether diacrylate, etc.) ); Esterified product of a polyvalent carboxylic acid (for example, phthalic anhydride) and a substance having a hydroxyl group and an ethylenically unsaturated group (for example, β-hydroxyethyl (meth) acrylate);

  The vinyl compound in the present invention can be appropriately selected so that the refractive index of the resin particles to be formed has a desired value, and at least one selected from an alkyl acrylate ester and an alkyl methacrylate ester is used. preferable.

(Radical polymerization initiator)
In the present invention, it is preferable to use a radical polymerization initiator in order to polymerize the vinyl compound. As the radical polymerization initiator, a commonly used radical polymerization initiator can be used without particular limitation. For example, a peroxide etc. are mentioned preferably. Specifically, organic peroxides or azo radical initiators that generate free radicals by heat are preferred.
Examples of the organic oxide include isobutyl peroxide, α, α'-bis (neodecanoylperoxy) diisopropylbenzene, cumylperoxyneodecanoate, di-n-propylperoxydicarbonate, and bis-s-. Butyl peroxydicarbonate, 1,1,3,3-tetramethylbutyl neodecanoate, bis (4-t-butylcyclohexyl) peroxydicarbonate, 1-cyclohexyl-1-methylethyl peroxyneodecanoate Bis-2-ethoxyethylperoxydicarbonate, bis (ethylhexylperoxy) dicarbonate, t-hexylneodecanoate, bismethoxybutylperoxydicarbonate, bis (3-methyl-3-methoxybutylperoxy) Dicarbonate, t-butyl pero Xineodecanoate, t-hexylperoxypivalate, 3,5,5-trimethylhexanoyl peroxide, octanoyl peroxide, lauroyl peroxide, stearoyl peroxide, 1,1,3,3-tetramethylbutyl Peroxy-2-ethylhexanoate, succinic peroxide, 2,5-dimethyl-2,5-bis (2-ethylhexanoyl) hexane, 1-cyclohexyl-1-methylethylperoxy-2-ethylhexa Noate, t-hexylperoxy-2-ethylhexanoate, 4-methylbenzoyl peroxide, t-butylperoxy-2-ethylhexanoate, m-toluonoylbenzoyl peroxide, benzoyl peroxide, t- Butyl peroxyisobutyrate, , 1-bis (t-butylperoxy) 2-methylcyclohexane, 1,1-bis (t-hexylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t-hexylperoxy) Cyclohexane, 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t-butylperoxy) cyclohexanone, 2,2-bis (4,4-dibutylper Oxycyclohexyl) propane, 1,1-bis (t-butylperoxy) cyclododecane, t-hexylperoxyisopropyl monocarbonate, t-butylperoxymaleic acid, t-butylperoxy-3,5,5-trimethyl Hexanoate, t-butyl peroxylaurate, 2,5-dimethyl-2,5-bis (m-toluoyl Oxy) hexane, t-butylperoxyisopropyl monocarbonate, t-butylperoxy-2-ethylhexyl monocarbonate, t-hexylperoxybenzoate, 2,5-dimethyl-2,5-bis (benzoylperoxy) hexane, t-butyl peroxyacetate, 2,2-bis (t-butylperoxy) butane, t-butylperoxybenzoate, n-butyl-4,4-bis (t-butylperoxy) valerate, di-t- Butyl peroxyisophthalate, α, α'-bis (t-butylperoxy) diisopropylbenzene, dicumyl peroxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane, t-butyl Cumyl peroxide, p-menthane hydroperoxide, 2,5-dimethyl -2,5-bis (t-butylperoxy) hexyne, diisopropylbenzene hydroperoxide, t-butyltrimethylsilyl peroxide, 1,1,3,3-tetramethylbutyl hydroperoxide, cumene hydroperoxide, t- Hexyl hydroperoxide, t-butyl hydroperoxide, 2,3-dimethyl-2,3-diphenylbutane and the like can be used.

  Examples of the azo radical initiator include azobisisobutyronitrile (AIBN, trade name V-60, manufactured by Wako Pure Chemical Industries, Ltd.), 2,2′-azobis (2-methylisobutyronitrile) ( Trade name V-59, manufactured by Wako Pure Chemical Industries, Ltd.), 2,2′-azobis (2,4-dimethylvaleronitrile) (trade name V-65, manufactured by Wako Pure Chemical Industries, Ltd.), dimethyl-2, 2'-azobis (isobutyrate) (trade name V-601, manufactured by Wako Pure Chemical Industries, Ltd.), 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile) (trade name V-70, Japanese Kosei Pharmaceutical Co., Ltd.).

  The usage-amount of a radical polymerization initiator can be suitably selected according to the kind of said vinyl compound, the refractive index of the resin particle formed, etc., and is used by the usage-amount normally used. Specifically, for example, it can be used at 0.01 to 2% by weight, preferably 0.1 to 1% by weight, based on the vinyl compound.

Next, the cosmetic of the present invention will be described.
<Cosmetics>
Examples of the cosmetics of the present invention include sunscreen creams, makeup base materials, lip balms, and the like, and are particularly limited as long as they contain at least the above-described fluorescent substance or cosmetic particles and do not impair the effects of the present invention. Not. It can also be used in combination with conventionally known sunscreen ingredients (ultraviolet absorbers, ultraviolet scatterers), and by containing the phosphor or cosmetic particles of the present invention, the sunscreen effect can be improved. When used in combination with a sunscreen component, these problems (irritation of decomposed residue, absorption, white powder, etc.) can be reduced by reducing the addition amount of a known sunscreen component.

  Hereinafter, the present invention will be described more specifically by way of examples. However, the present invention is not limited to these examples. Unless otherwise specified, “%” and “part” are based on mass.

<Synthesis of fluorescent substances>
200 mg of 4,4,4-trifluoro-1- (thienyl) -1,3-butanedione (TTA) was dissolved in 7 ml of ethanol, and 1.1 ml of 1M sodium hydroxide was added thereto and mixed. 6.2 mg of 1,10-phenanthroline dissolved in 7 ml of ethanol is added to the above mixed solution and stirred for 1 hour, and then a solution of 103 ml of EuCl ₃ · 6H ₂ O in 3.5 ml is added to obtain a precipitate. This was separated by filtration, washed with ethanol, and dried to obtain a fluorescent substance Eu (TTA) ₃ Phen (phenanthroline-based europium complex).

<Preparation of particle A>
0.05 g of the fluorescent substance Eu (TTA) ₃ Phen obtained above, 100 g of methyl methacrylate, 0.5 g of 2,2′-azobis (2,4-dimethylvaleronitrile) as a thermal radical initiator, Each was weighed, placed in a sealed container, subjected to bulk polymerization at 60 ° C. for 4 hours and subsequently at 80 ° C. for 2 hours, cooled to room temperature, and taken out from the container. The obtained resin composition containing the fluorescent substance was pulverized and classified using a sieve to obtain cosmetic particles A having a particle size distribution of 50 to 150 μm.

Example 1
<Preparation of cosmetic composition>
A mixture of 1.0 g of commercially available product “Young Skin Story Sunscreen Cream SN382” (Salad Town Co., Ltd.) and 0.01 g of fluorescent substance Eu (TTA) ₃ Phen in a polycup, Got. In particular, there was no change in the hue or feeling of use.
<Measurement of UV intensity>
The obtained cosmetic composition was applied on a glass substrate with a thickness of about 10 to 20 μm and allowed to stand for about 30 minutes. Thereafter, 365 nm light is irradiated onto the glass substrate from the upper part using a handy UV lamp SLUV-4 manufactured by ASONE Co., Ltd., and the intensity of the transmitted ultraviolet light is measured using a UV illuminance meter UV-MO2 manufactured by Oak Co., Ltd. Used to measure the strength. After the measurement, the sample was left at room temperature (25 ° C.) for 1 week, and the strength was measured in the same manner (see FIG. 1). The measurement results are shown in Table 1.

(Example 2)
<Preparation of cosmetic composition>
Commercially available product “Young Skin Story Sunscreen Cream SN382” (Salad Town Co., Ltd.) 1.0 g and the above cosmetic particles A0.1 g were kneaded in a polycup to obtain a cosmetic composition. The obtained cosmetic composition was not particularly changed in color and feeling of use.
<Measurement of UV intensity>
The obtained cosmetic composition was applied onto a glass substrate in the same manner as in Example 1, and the ultraviolet intensity was measured. The measurement results are shown in Table 1.

(Comparative Example 1)
<Measurement of UV intensity>
A commercially available product “Wakakin Monogatari Sunscreen Cream SN382” (Salad Town Co., Ltd.) was applied onto a glass substrate in the same manner as in Example 1, and the ultraviolet intensity was measured. The measurement results are shown in Table 1.

  Examples 1 and 2 to which a fluorescent substance or cosmetic particles containing a fluorescent substance are added have a lower ultraviolet intensity that penetrates the resin composition than the additive-free comparative example 1, and have an effect of preventing sunburn. It could be confirmed. In particular, in Example 2 to which cosmetic particles were added, it was confirmed that the measurement results did not change even after one week had passed after mixing and application, and the stability was excellent.

DESCRIPTION OF SYMBOLS 1 UV lamp 2 Cosmetic composition layer 3 Glass substrate 4 UV ray illuminance meter

Claims (10)

  Cosmetic particles that are used by being added to a cosmetic material, the cosmetic particles comprising a fluorescent material and a transparent material.   The cosmetic particle according to claim 1, wherein the fluorescent substance is an organic phosphor or a rare earth metal complex.   The cosmetic particle according to claim 1, wherein the fluorescent substance is a rare earth metal complex.   The cosmetic particle according to any one of claims 1 to 3, wherein the fluorescent substance is a europium complex.   The cosmetic particle according to any one of claims 1 to 4, wherein the transparent material is a transparent resin.   The cosmetic particle according to any one of claims 1 to 5, wherein the transparent material is a transparent vinyl resin.   The cosmetic particle according to any one of claims 1 to 6, wherein the transparent material is a transparent (meth) acrylic resin.   The cosmetic material particles according to any one of claims 1 to 7, wherein the cosmetic particles are resin particles obtained by emulsion polymerization or suspension polymerization of a vinyl monomer composition in which the fluorescent substance is dissolved or dispersed. Cosmetic particles.   Cosmetics containing the particles for cosmetics according to any one of claims 1 to 8.   Cosmetics containing europium complex.

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