WO2019107093A1

WO2019107093A1 - Powder cosmetic

Info

Publication number: WO2019107093A1
Application number: PCT/JP2018/041242
Authority: WO
Inventors: 大澤友
Original assignee: 株式会社資生堂
Priority date: 2017-11-29
Filing date: 2018-11-06
Publication date: 2019-06-06
Also published as: TW201924649A; JP2019099466A; JP7091058B2

Abstract

Provided is an elastomer for improving the feel of an inorganic powder on the skin. A powder cosmetic according to the present invention is characterized by including: (A) 5-70 mass% of an inorganic powder having an elastomer coating layer including the following (a1) and (a2); and (B) 1-20 mass% of boron nitride. The present invention also pertains to an elastomer comprising: (a1) a silicone polymer having an amino group; and (a2) a silicone polymer having a carboxyl group or an acrylic polymer having a carboxyl group, the elastomer being characterized in that the molar ratio of the amino group and the carboxyl group is in the range of Y/X=0.1-1.2 (Y represents the molar quantity of the carboxyl group included in component (a2), and X represents the molar quantity of the amino group included in component (a1)).

Description

Powder cosmetic

Related application

This application claims the priority of Japanese Patent Application No. 2017-228776 filed on November 29, 2017, which is incorporated herein.

TECHNICAL FIELD The present invention relates to a powder cosmetic, and more particularly to the improvement of the feeling of use on the skin, and the improvement of the moldability and the drop stability of the powder cosmetic by using an inorganic powder coated with an elastomer and boron nitride.

In order to obtain the functions required for makeup cosmetics such as foundations and makeup bases, various powder treatments are performed.
For example, a hydrophobic treatment agent and an acrylic monomer (such as 11-methacrylamidoundecanoic acid) having a specific structure are contained as a constituent monomer on the surface of the base powder in order to improve the washing performance while having excellent hydrophobicity. Powder coated with a polymer to be mixed was known (Patent Document 1)

In addition, in order to provide a powder cosmetic excellent in makeup retention (prevention of makeup collapse), in particular, a powder makeup cosmetic such as a foundation or a makeup base, the makeup retention (prevention of makeup collapse prevention) by blending a specific treated powder. It has been known to provide a powder cosmetic composition excellent in 2.).

Special Feature 2007-277167 Patent document 1: JP 2008-184399

However, the treated inorganic powders taught in Patent Documents 1 and 2 are incorporated in cosmetics and applied to the skin to give a crisp feel to the skin and a powdery feel to the skin. There was a problem that there was a case.
The present invention has been made in view of the above circumstances, and by using an inorganic powder whose surface is coated with a specific elastomer in combination with boron nitride, the feel of the powder cosmetic on the skin is improved and moist as powdery. The purpose is to give a sense of Another object of the present invention is to provide a powder cosmetic which is excellent in drop stability.

The present inventors have intensively studied to solve the above problems, and as a result, a composition having an elastomeric property in which a silicone polymer having an amino group and a silicone polymer having a carboxyl group or an acrylic polymer having a carboxyl group are combined. And coated the inorganic powder. And, by using the inorganic powder coated with the elastomer and boron nitride in the powder cosmetic, it was found that the powder cosmetic has an improved feel on the skin and a moist and non-powdery feeling. Furthermore, it has been found that a cosmetic excellent in drop stability can be obtained, and the present invention has been completed.
The powder cosmetic according to the present invention comprises (A) 5 to 70% by mass of an inorganic powder () having an elastomer coating layer containing the following (a1) and (a2), and (B) 1 to 20% by mass of boron nitride: It is characterized by including.
And an elastomer comprising (a1) a silicone polymer having an amino group and (a2) a silicone polymer having a carboxyl group or an acrylic polymer having a carboxyl group, wherein the molar ratio of the amino group to the carboxyl group is Y /. X is in the range of 0.1 to 1.2 (Y is a molar amount of a carboxyl group contained in the component (a2), and X is a molar amount of an amino group contained in the component (a1)) Do.
In the powder cosmetic, the amount of the elastomer is preferably 0.5 to 20% by mass with respect to the amount of the inorganic powder.
Further, in the powder cosmetic, a silicone polymer having an amino group, wherein the component (a1) comprises the following general formula (1):
(A2) A silicone polymer having a carboxyl group consisting of the following general formula (2) or an acrylic polymer having a carboxyl group consisting of the following general formula (3) is preferable.
(A) A silicone polymer having an amino group consisting of the following general formula (1):
(B) A silicone polymer having a carboxyl group consisting of the following general formula (2) or an acrylic polymer having a carboxyl group consisting of the following general formula (3)
Wherein the molar ratio of amino groups to carboxyl groups is Y / X = 0.1 to 1.2 (Y is the molar amount of carboxyl groups contained in component (B), X is (A) It is preferable that it is in the range of the molar amount of the amino group contained in the component).

(In the general formula (1), X is an alkyl group having 1 to 18 carbon atoms, and R and R ′ are alkyl groups.)

(In the formula, R 1 and R 2 each represent a methyl group or a group represented by (4) below, which contains 1 to 100 of the group in one molecule, and y represents an integer of 1 to 50,000.

According to the present invention, use of the inorganic powder having the elastomer coating layer in powder cosmetics and boron nitride improves the feel on the skin and has a moist and non-powdery feeling. And the cosmetics excellent in fall stability can be provided.

Hereinafter, the present invention will be described in detail.
(A) Inorganic Powder Having an Elastomer Coating Layer The inorganic powder having an elastomer coating layer used in the present invention is prepared by mixing (a1) a silicone polymer having an amino group and a silicone polymer having a carboxyl group (a2) and heating These are elastomers produced by coating the surface of an inorganic powder. First, constituent components (a1) and (a2) of the elastomer used in the present invention will be described.

(A1) Silicone Polymer Having an Amino Group The silicone polymer having an amino group (a1) used in the present invention is a side-chain amino-modified silicone represented by the following general formula (1).

In the general formula (1), m is preferably 20 to 2,000 because the hardness of the resulting elastomer is suitable. If it is less than 20, it is not preferable in that the elastomer may not be formed. Moreover, when it exceeds 2000, it is not preferable at the point which may produce the difficulty of handling and the difficulty of manufacture.

In the general formula (1), n is preferably 1 to 100 because the hardness of the resulting elastomer is suitable. If it is less than 1, it may be undesirable in that it may not form an elastomer. If it exceeds 100, it may be undesirable in that the elastomer may be too hard.

In the general formula (1), an alkyl chain is preferably used as R, and a propyl group is preferable because of mass productivity.
In the general formula (1), an alkyl chain is preferably used as R ′, and an ethyl group is preferable because of mass productivity.

The amino group equivalent of the silicone polymer (a1) having an amino group is preferably 500 g / mol to 20000 g / mol because the hardness of the resulting elastomer is suitable. An amino group equivalent of less than 500 is not preferable in that the elastomer may be too hard. Moreover, when an amino group equivalent exceeds 20000, it is unpreferable at the point which does not form an elastomer.

(A1) Commercially available products of silicone polymers having an amino group include, for example, KF-804, KF-8005S, KF-867S (Shin-Etsu Chemical Co., Ltd.), XF42-B1989 (MOMENTIVE company), ADM1650, ADM1370 (Asahi Kasei) Wacker Silicone Co., Ltd., SF8452C, SS3551 (Toray Dow Corning Co., Ltd.) and the like.

The amino group equivalent represents a value representing the weight of the substance per mole of amino group relative to the substance containing an amino group.

(A2) Silicone polymer having carboxyl group or acrylic polymer having carboxyl group As the silicone polymer having carboxyl group (a2) used in the present invention, the carboxyl group equivalent represented by the following general formula (2) is 1,000 g / mol It is a side chain type carboxyl modified silicone having a weight of 4 to 40,000 g / mol.
The acrylic polymer having a carboxyl group (a2) used in the present invention is a side-chain carboxyl-modified acrylic polymer having a carboxyl group equivalent represented by the following general formula (3) and having a weight of 200 g / mol to 1000 g / mol.

The said carboxyl group equivalent represents the numerical value showing the weight of the substance per 1 carboxyl group with respect to the substance containing a carboxyl group.

General formula (2) consists of following Chemical formula 2 and Chemical formula 3.

(In the formula, R 1 and R 2 each represent a methyl group or a group represented by the following [Chemical formula 3], which contains 1 to 100 in one molecule, and y represents an integer of 1 to 50,000. )

General formula (3) consists of following Chemical formula 4.

(In the general formula (3), m / (m + n) = 0 to 0.5.)

As a commercial item of the silicone polymer which has a carboxyl group shown by General formula (2), sensor Sill PCA (made by Croda) etc. are mentioned, for example.

The acrylic polymer having a carboxyl group represented by the general formula (3) can be synthesized using a known method.
As a specific example, 12-methacrylamide dodecanoic acid (MAD) / 2-acrylamido-2-methylpropane sulfonic acid (AMPS) copolymer (90/10), 12-methacrylamide dodecanoic acid (MAD) 18.50 g (65) .37 mmol), 2-acrylamido-2-methylpropane sulfonic acid (AMPS: manufactured by Sigma-Aldrich Japan) 1.50 g (7.24 mmol), sodium hydroxide 0.29 g (7.25 mmol), azobisisobutyric acid 0.30 g (1.83 mmol) of ronitrile (manufactured by Nacalai Tesque) was dissolved in 60.0 g of methanol. Azobisisobutyronitrile was used by recrystallization from methanol according to a conventional method. Degassing was performed by bubbling argon for 60 minutes, the vessel was capped with a septum, and polymerization was carried out by heating at 60 ° C. for 20 hours. After completion of the polymerization reaction, the reaction solution was dropped into a large excess of diethyl ether, and the precipitate was collected by suction filtration. After drying under reduced pressure, 15.2 g of random MAD / AMPS copolymer (90/10) was obtained (yield: 75.1%). The weight average molecular weight was 50000.

The carboxyl group equivalent of the component (a2) is preferably 200 to 40,000 because the hardness of the resulting elastomer is suitable. If it is less than 200, it is not preferable in that the elastomer may be too hard. Moreover, when it exceeds 40000, it is unpreferable in the point which may not form an elastomer.

The molar ratio of the amino group in the silicone polymer having an amino group (a1) to the carboxyl group of the silicone polymer having a carboxyl group (a2) or the acrylic polymer having a carboxyl group is Y / X = 0.1 to 1.2. (Y is a molar amount of a carboxyl group contained in the (a2) component, and X is a molar amount of an amino group contained in the (a1) component). More preferably, it is 0.1 to 0.8. If it is less than 0.1, the elastomer may not be formed, which is not preferable. Moreover, when larger than 1.2, since an elastomer may not be formed, it is not preferable.

The above elastomer is coated on the surface of the inorganic powder. And when the inorganic powder coat | covered with the elastomer is used for cosmetics, the touch to a skin is improved and it has a feeling which is not powdery as moist. In addition, a cosmetic excellent in drop stability can be obtained.

The amount of the elastomer is 0.5 to 20% by mass, more preferably 1 to 15% by mass, based on the inorganic powder. It is unpreferable from the point which may produce fusion | fusion of inorganic powder, and the fall of the moldability of powder cosmetics when it mix | blends exceeding 20 mass%. Moreover, it is unpreferable in the point that the improvement effect of a touch may not be acquired as a compounding quantity is less than 0.5 mass%.

The blending amount of the inorganic powder having the elastomer coating layer is 5 to 70% by mass, more preferably 20 to 50% by mass, with respect to the powder cosmetic. It is unpreferable in that it may become impossible to mix | blend the other component normally required as powder cosmetics, and it may become that a function becomes inferior when it mix | blends exceeding 70 mass%. Moreover, it is unpreferable in the point which the improvement effect of use feeling may not be acquired as a compounding quantity is less than 5 mass%.

A powder material usable in cosmetics is selected as the inorganic powder to be coated with the elastomer. Among these, talc, mica, sericite, kaolin, titanium oxide, iron oxide, zinc oxide and the like are preferably used.

As the inorganic powder, commercially available products include JET-R series (made by Asada Powder Co., Ltd.), Microace series (made by Nippon Talc), FL108 made by Fuji Talc, FG106, MG115
RL217 etc. are mentioned. In addition, examples of mica include PDM series, PDM-L series, PDM-FE and the like manufactured by TOPY INDUSTRIES, LTD.

The step of mixing the inorganic powder and the silicone polymer having (a1) amino group, and the step of mixing (a2) the silicone polymer having carboxyl group, and heating the inorganic powder having the (A) elastomer coating layer used in the present invention You can get

The inorganic powder having the (A) elastomer coating layer can be obtained by a known method for producing a coating powder. As a specific example, inorganic powder and (a1) silicone polymer having an amino group are added to a Henshal mixer, and mixed at a low speed for 10 minutes. Then, (a2) a silicone polymer having a carboxyl group is added thereto, mixed at low speed for 10 minutes, and heated, whereby an elastomer-coated inorganic powder used in the present invention can be obtained.
Moreover, the inorganic powder which has an elastomer coating layer used for this invention can be obtained even if the order of addition of (a1) component and (a2) component is reverse.

(B) Boron Nitride The compounding amount of (B) boron nitride is 1 to 20% by mass, more preferably 3 to 20% by mass, with respect to the powder cosmetic. If the compounding amount is less than 1% by mass, it is not preferable in that the improvement effect of the use feeling may not be obtained.

(B) As boron nitride, as a commercial item, BN leaf powder series (made by Mizushima-Iron Iron Co., Ltd.), CC series made by Momentive, CCS series etc. are mentioned.

In addition to the inorganic powder (A) having an elastomer coating layer used in the present invention and (B) boron nitride, inorganic powders and organic powders usable in cosmetics may be blended.

Inorganic powders include, for example, sericite, natural mica, calcined mica, synthetic mica, synthetic sericite, alumina, mica, kaolin, bentonite, smectite, calcium carbonate, magnesium carbonate, calcium phosphate, anhydrous silicic acid, magnesium oxide, tin oxide, Iron oxide, yttrium oxide, chromium oxide, titanium oxide, zinc oxide, cerium oxide, aluminum oxide, magnesium oxide, chromium hydroxide, bitumen, ultramarine, calcium phosphate, aluminum hydroxide, barium hydroxide, barium sulfate, magnesium sulfate, silicic acid, aluminum silicate Magnesium, calcium silicate, barium silicate, magnesium silicate, aluminum silicate, strontium silicate, silicon carbide, magnesium fluoride, metal tungstate, magnesium aluminate, metasilicate Magnesium chlorate, chlorhydroxy aluminum, clay, zeolite, hydroxyapatite, ceramic powder, spinel, mullite, cordierite, aluminum nitride, titanium nitride, silicon nitride, lanthanum, samarium, tantalum, terbium, europium, neodymium, Mn-Zn ferrite , Ni-Zn ferrite, silicone carbonate, cobalt titanate, barium titanate, iron titanate, lithium cobalt titanate, cobalt aluminate, antimony containing tin oxide, tin containing indium oxide, magnetite, aluminum powder, gold powder, silver powder, platinum Powder, copper powder, precious metal colloid, iron powder, zinc powder, cobalt blue, cobalt violet, cobalt green, low order titanium oxide, fine particle titanium oxide, butterfly sulfuric acid Lithium, petaloid zinc oxide, tetrapod-like zinc oxide, fine particle zinc oxide, as a pearl pigment titanium oxide coated mica, titanium oxide coated mica, titanium oxide coated synthetic mica, titanium oxide coated silica, titanium oxide coated synthetic mica, titanium oxide Examples of the material include coated talc, zinc oxide coated silica, titanium oxide coated colored mica, bengala coated mica titanium, bengal black iron oxide coated mica titanium, carmine coated mica titanium, conjo coated mica titanium and the like.

Examples of commercial products of these inorganic powders include IRIODIN (registered trademark) series, TIMIRON (registered trademark) series, COLORONA series (registered trademark) series, DICHRONA (registered trademark) series, and XIRONA (registered trademark) series of MERCK. RONASTAR (registered trademark) series, DESERT REFLECTIONS series of BASF, TIMICA series, FLAMENCO series, CLOIZONNE series, DUOCROME series, GEOMTONE series, CELLINI series, MERRALMAID series, REFLECKS series, CHROMA-LITE series, COSMICA series, ECKART PRESTIGE ( Registered trademark series, VISION IRE (registered trademark) series, MIRAGE series, Metashiain (registered trademark) of Nippon Sheet Glass Co., Ltd., PROMINENCE (registered trademark) of Nippon Koken Co., Ltd., Cosmetica White Pear 1 series of CQV, Sharon Pear 1 series, Precioso White Peartescent Pigments of Taizu Corporation A series etc. are mentioned. Effect pigments such as aluminum flakes, silica flakes, alumina flakes, glass flakes, bengara coated mica, carmine, titanium oxide coated borosilicate (sodium / calcium), titanium oxide coated borosilicate (calcium / aluminum), bismuth oxychloride, fish scale foil , Stainless steel powder, tourmaline powder, powder of crushed gemstone such as sapphire or ruby, mango violet, glass fiber, carbon fiber, silicon carbide fiber, alumina fiber, β-wollastonite, zonolite, potassium titanate fiber, aluminum borate fiber , Basic magnesium sulfate fiber, silicon nitride fiber and the like.

Organic powder (eg, silicone elastomer powder, silicone powder, silicone resin-coated silicone elastomer powder, polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder (eg, methyl methacrylate crosspolymer), polystyrene powder, styrene and acrylic resin Acid copolymer resin powder, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose powder, etc .; organic pigments such as zirconium, barium or aluminum lake (eg red 201, red 202, red 204, red Organic pigments such as No. 205, Red 220, Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401, and Blue 404, and the like can be mentioned.

<Drying method>
The inorganic powder component, the oil component and the other components are mixed beforehand with a Henschel mixer and then crushed twice with a pulper. Then, the obtained mixture is filled in a resin-made inner dish container and subjected to dry press molding according to a known method, and solid powder obtained by blending the inorganic powder having the elastomer coating layer of the present invention and boron nitride with cosmetics. Cosmetics can be obtained.

<Other manufacturing methods>
A known method can be used as a method of mixing and manufacturing the inorganic powder and the boron nitride which have an elastomer coating layer of this invention to cosmetics. For example, a production method in which the slurry using the volatile solvent described in Japanese Patent No. 5422092 is dried and produced, a production method in which the slurry using the volatile solvent described in Patent No. 5972437 is removed after filling It can be obtained suitably.

According to the present technology, it is possible to apply an elastomer coating to all of the inorganic powder and the organic powder to be blended in the cosmetic at one time, and to add other oils to obtain the cosmetic. That is, all the inorganic powder and organic powder in the cosmetic composition are mixed in advance, and an elastomer-forming oil is added to the obtained mixed powder and heated to obtain an elastomer-coated mixed powder, then (a1) and (a2) By blending the oil component, a cosmetic having excellent feel in use and drop resistance was obtained.

On the other hand, the elastomer forming oils (a1) and (a2) used in the present technology are added together with other oils, and the intended function of the present invention can not be obtained in the heating step.
That is, an inorganic powder and an organic powder in a cosmetic material are mixed, (a1) and (a2) and other oils are mixed and added here, and when heated, the cosmetic is inferior in both feel in use and drop resistance. turn into.

As oil components other than (a1) and (a2), it is possible to contain in the qualitative and quantitative range which does not impair the effect of the present invention. Liquid oil, solid oil, wax, hydrocarbon, higher fatty acid, higher alcohol, ester, silicone, moisturizer, water-soluble polymer, thickener, film agent, UV absorber, sequestering agent, lower alcohol, polyvalent Alcohols, sugars, amino acids, organic amines, polymer emulsions, pH adjusters, skin nutrients, antioxidants, antioxidants, perfumes, etc., as needed, and appropriately formulated according to the desired dosage form. It can be manufactured by

Examples of liquid oils and fats include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil And safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Japanese oak oil, Japanese tung oil, jojoba oil, germ oil, triglycerin and the like.
As solid fats and oils, for example, cacao butter, coconut oil, horse fat, hydrogenated coconut oil, palm oil, beef tallow, sheep fat, hydrogenated beef tallow, palm kernel oil, pork fat, beef bone fat, mokurou kernel oil, hydrogenated oil, beef Examples include foot fat, wax wax, hydrogenated castor oil and the like.

Examples of the waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ivory wax, persimmon wax, montan wax, nuka wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugar cane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin And jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether and the like.
Examples of hydrocarbon oils include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, vaseline, microcrystalline wax and the like.
Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, tallic acid, isostearic acid, linoleic acid, linoleic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid ( DHA) and the like.

As higher alcohols, for example, straight-chain alcohols (eg, lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol etc.); branched chain alcohols (eg, monostearyl glycerol ether (Batyl alcohol) And 2-decyltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyldodecanol, isostearyl alcohol, octyldodecanol and the like) and the like.
As synthetic ester oils, isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, decyl dimethyl octanoate, cetyl lactate, myristyl lactate , Lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, apple Diisostearyl acid, glycerin di-2-heptylundecanoate, trimethylolpropane tri-2-ethylhexanoate, trimethylo triisostearate Propane, pentaerythritol tetra-2-ethylhexanoate, glycerin tri-2-ethylhexanoate, glycerin trioctanoate, glycerin triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexylpalmi Tate, glyceryl trimyristate, glyceride tri-2-heptylundecanoate, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2 -Octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyl adipate Le, diisopropyl sebacate, 2-ethylhexyl succinate, and triethyl citrate.

As silicone oil, for example, linear polysiloxane (for example, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane and the like); cyclic polysiloxane (for example, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexene) Silicone resin, silicone rubber, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane etc.), etc. Be

As a moisturizing agent, for example, polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucotin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate And sodium lactate, bile salts, dl-pyrrolidone carboxylates, alkylene oxide derivatives, short chain soluble collagen, diglycerin (EO) PO adducts, extract of Izayoira, extract of Yarrow extract, extract of Meriloto, and the like.

Examples of UV absorbers include benzoic acid UV absorbers (for example, paraaminobenzoic acid (hereinafter referred to as PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester N, N-dimethyl PABA ethyl ester, N, N-dimethyl PABA butyl ester, N, N-dimethyl PABA ethyl ester, etc.); anthranilic acid ultraviolet light absorbers (eg, homomentyl-N-acetyl anthranilate etc.); Salicylic acid based UV absorbers (eg, amyl salicylate, menthyl salicylate, homomentyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, etc.); cinnamic acid based UV absorber (eg, octyl methoxycinnamate, ethyl -4-isopropylcinnamate Methyl-2,5-diisopropylcinnamate, ethyl-2,4-diisopropylcinnamate, methyl-2,4-diisopropylcinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl- p-Methoxycinnamate, octyl-p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano- β-phenylcinnamate, 2-ethylhexyl-α-cyano-β-phenylcinnamate, glyceryl mono-2-ethylhexanoyl-diparamethoxycinnamate, etc .; benzophenone type UV absorbers (eg, 2,4-dihydroxy) Benzophenone, 2,2'-Dihydroxy-4-methoxybenzophenone, 2,2'-Dihydroxy-4,4'-dimethoxyben Zophenone, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5- Sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4'-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone etc.); 3- (4'-methylbenzylidene) -d, l-camphor, 3-benzylidene-d, l-camphor; 2-phenyl-5-methylbenzoxazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2 -(2'-hydroxy-5'-t-octylphenyl) benzotriazole; 2- (2'-hydroxy-5'-methylphenylbenzotriazole; dibenzalazine; dianisoylmethane; 4-methoxy-4'-t- 2, 4- (3, 3-Dimethyl-2-norbornylidene) -3-pentan-2-one, dimorpholinopyridazino; 2-ethylhexyl 2-cyano-3, 3-diphenylacrylate; 4-bis-{[4- (2-ethylhexyloxy) -2-hydroxy] -phenyl} -6- (4-methoxyphenyl)-(1,3,5) -triazine and the like.

Cosmetics prepared by blending the inorganic powder having the elastomer coating layer of the present invention and boron nitride are water, powders other than the above, surfactants, lower alcohols, polyhydric alcohols, moisturizers, preservatives, as required. It is possible to contain molecules (including coating agents), antioxidants, perfumes, other various drugs, etc. in a qualitative and quantitative range that does not impair the effects of the present invention.

The powder cosmetic of the present invention may be in the form of foundation, teak, sunscreen, any product, and in particular, its use as a foundation is suitable.

Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not limited thereto. The compounding amounts are shown as% by mass relative to the system in which the components are compounded, unless otherwise specified.
First, evaluation methods and evaluation criteria used in the following tests will be described.

<Elastomer coating test>
The test method confirmed that the original powder and the elastomer were not separated by visual observation and touch. Further, it was confirmed by elemental analysis that an appropriate amount of the elastomer was coated with respect to the preparation amount, and that it floated on water to exhibit water repellency to confirm that the coating was appropriate.
:: powder coated with elastomer ×: powder not coated with elastomer

First, when the composition used for this invention mixed the silicone polymer which has (a1) amino group, and the silicone polymer which has (a2) carboxyl group, it examined about the compounding quantity used as an elastomer.

The elastomer used for this invention of the formulation described in each following table was prepared according to the following manufacturing method.
<Manufacturing method>
A silicone polymer having a carboxyl group and a silicone polymer having an amino group were added and stirred, and heated at 105 ° C. for 12 hours to obtain an elastomer used in the present invention.

First, the inventors have found that a composite of a silicone polymer having an amino group (a1) and a silicone polymer having a carboxyl group (a2) has an elastomeric property and the molar ratio of amino group to carboxyl group Y / X (Y The molar amount of the carboxyl group contained in the component (a2) and the molar amount of the amino group contained in the component (a1) of X were examined. Y / X is the carboxyl group equivalent calculated | required from NMR, and the carboxyl group weight (mmol) calculated from the diamino group equivalent / amino group weight (mmol).
The formulations of the test examples listed in Tables 1 and 2 below are as follows.

(* 1) KF-8004 (Shin-Etsu Chemical Co., Ltd.)
The ¹ H NMR of KF-8004 was measured, and the diamine equivalent was calculated from the integration value of the signal derived from CH _{3 and} the signal derived from -CH _2- to be 3090.4 g / mol.
(* 2) Sensor sill PCA (Croda)
The ¹ H NMR of Sensorcyl PCA was measured, and the carboxyl equivalent was calculated from the integral value of the signal derived from CH _{3 and} the signal derived from —CH ₂ — and was 5631 g / mol.

It turned out that it becomes an elastomer in the range of test example 1-4 to 1-9.
Therefore, it was found that the molar ratio of amino group to carboxyl group is excellent as Y / X = 0.1 to 1.2.

Next, the present inventor examined whether it is possible to substitute an acrylic polymer having a carboxyl group as the other component (a2).

(* 3) The COOH-containing acrylic polymer was obtained by the following method.
12-methacrylamidododecanoic acid (MAD) / 2-acrylamido-2-methylpropane sulfonic acid (AMPS) copolymer (90/10), 18.50 g (65.37 mmol) of 12-methacrylamidododecanoic acid (MAD), 2- Acrylamide-2-methylpropanesulfonic acid (AMPS: manufactured by Sigma-Aldrich Japan) 1.50 g (7.24 mmol), sodium hydroxide 0.29 g (7.25 mmol), azobisisobutyro nitrile (Nacalai Tesque, Inc.) 0.30 g (1.83 mmol) were dissolved in 60.0 g of methanol. Azobisisobutyronitrile was used by recrystallization from methanol according to a conventional method.
Degassing was performed by bubbling argon for 60 minutes, the vessel was capped with a septum, and polymerization was carried out by heating at 60 ° C. for 20 hours. After completion of the polymerization reaction, the reaction solution was dropped into a large excess of diethyl ether, and the precipitate was collected by suction filtration.
After drying under reduced pressure, 15.2 g of a random COOH-containing acrylic polymer was obtained (yield: 75.1%). The resulting COOH-containing acrylic polymer had a weight average molecular weight of 50,000.

From this, it was found that even with an acrylic polymer having a carboxyl group, the elastomer used in the present invention can be obtained.

<Elastomer-coated inorganic powder>
Furthermore, the inventor examined below whether the elastomer used in the present invention can be coated with various inorganic powders.

<Manufacturing method>
Various inorganic powders and a silicone polymer having a carboxyl group are added to the Henshal mixer and mixed at a low speed for 10 minutes. Then, a silicone polymer having an amino group was added thereto, mixed at a low speed for 10 minutes, and heated to obtain an inorganic powder having an elastomer coating layer used in the present invention.

Various inorganic powder talc in Table 4: Talc JA-68R (manufactured by Asada Powder Co., Ltd.)
Mica: PDM-9WA (made by TOPY INDUSTRIES, LTD.)
Synthetic phlogopite iron: PDM-FE (manufactured by TOPY INDUSTRIES, LTD.)

From the test examples 3-1 to 3-4, it was found that the elastomer according to the present invention can be coated with various (C) inorganic powders.

Powder cosmetics
The present inventors examined blending the talc having the elastomer coating layer into the cosmetic for the powder cosmetic according to the present invention based on the following evaluation criteria.

Drop Test
The following criteria were evaluated about the damage of the formulation at the time of dropping each test example composition 5 times from height of 30 cm.
○: not damaged ×: damaged

<Feeling of use>
Each test example composition was relatively evaluated based on Test Example 4-1. The feeling of use was integrated on the palm and was not powdery when applied to the skin, lightness, smoothness, fit, and familiarity with the skin, and evaluated by the following criteria by 10 expert panels.
◎: 9 or more out of 10 answered that the use feeling of the test example is better than the standard.
○: 6 or more and less than 9 out of 10 answered that the use feeling of the test example is better than the standard.
Fair: 3 or more and less than 6 out of 10 answered that the use feeling of the test example is better than the reference.
X: Less than 3 out of 10 persons answered that the use feeling of the test example is better than the standard.

<Method of producing dry elastomer-coated inorganic powder-blended cosmetic>
A powder component, an oil component and other components shown in the following formulation were previously mixed with a Henschel mixer, and then crushed twice with a pulper. The obtained mixture was filled in a resin middle dish container and subjected to dry press molding by a known method to obtain a solid powder cosmetic.

Next, as elastomer (A), talc coated elastomer used in the present invention, boron nitride is blended as (B) component, and in addition to the improvement of feeling in use, it is examined whether the fall resistance can be improved. The

(* 1) Elastomer-treated talc (Talc JA-68R (A: 2%, B: 3%))
(* 2) Talc JA-68R (manufactured by Asada Powder Co., Ltd.)
(* 3) PDM-9WA (made by TOPY INDUSTRIES, LTD.)
(* 5) Microsphere M-306 (manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.)
(* 6) SHP-3 (Mizushima Alloy Iron Co., Ltd.)
(* 7) Sunsphere L-51S (manufactured by AGC S ITEC Co., Ltd.)
(* 8) EP1-CR-50P (made by Daito Kasei Kogyo Co., Ltd.)
(* 10) EP1-Bengara # 216P (made by Daito Kasei Kogyo Co., Ltd.)
(* 11) EP1-Okuru # 1P (made by Daito Kasei Kogyo Co., Ltd.)
(* 12) EP1-BL-100P (made by Daito Kasei Kogyo Co., Ltd.)
(* 14) RA-G-308 (manufactured by Nippon Seika Co., Ltd.)
(* 17) Estemol 182V (made by Nisshin Oillio Group, Inc.)

As can be seen from Test Examples 4-1 to 4-5, the combination of (A) talc having an elastomer coating layer and (B) boron nitride is extremely excellent in fall stability in addition to the feeling of use. I found that.
It was found that when the blending amount of (B) boron nitride is 1 to 20% by mass with respect to the powder cosmetic, the feeling in use is excellent.

Next, the present inventors examined whether use feeling improved even when using an inorganic powder having an elastomer coating layer other than talc.

From the test examples 5-1 to 5-2, it was found that the use feeling is improved even when using an inorganic powder having an elastomer coating layer other than talc.

Claims

(A) 5 to 70% by mass of inorganic powder having an elastomer coating layer containing the following (a1) and (a2):
(B) A powder cosmetic comprising 1 to 20% by mass of boron nitride.
(A1) a silicone polymer having an amino group,
(A2) a silicone polymer having a carboxyl group or an acrylic polymer having a carboxyl group,
The molar ratio of amino groups to carboxyl groups is Y / X = 0.1 to 1.2 (Y is the molar amount of carboxyl groups contained in the component (a2), and X is (a1) Elastomer characterized by being in the range of molar amounts of amino groups contained in the component).
Powdered cosmetic according to claim 1, characterized in that the amount of elastomer is from 0.5 to 20% by weight, based on the amount of inorganic powder.
The powder cosmetic according to any one of claims 1 and 2.
(A1) a silicone polymer having an amino group consisting of the following general formula (1):
(A2) A powder cosmetic comprising a silicone polymer having a carboxyl group consisting of the following general formula (2) or an acrylic polymer having a carboxyl group consisting of the following general formula (3).
(A) A silicone polymer having an amino group consisting of the following general formula (1):
(B) A silicone polymer having a carboxyl group consisting of the following general formula (2) or an acrylic polymer having a carboxyl group consisting of the following general formula (3)
Wherein the molar ratio of amino groups to carboxyl groups is Y / X = 0.1 to 1.2 (Y is the molar amount of carboxyl groups contained in component (B), X is (A) Elastomer characterized by being in the range of molar amounts of amino groups contained in the component).

(In the general formula (1), X is an alkyl group having 1 to 18 carbon atoms, and R and R ′ are alkyl groups.)

(In the formula, R 1 and R 2 each represent a methyl group or a group represented by (4) below, which contains 1 to 100 of the group in one molecule, and y represents an integer of 1 to 50,000.