JP2004250432A - Modified silk powder and cosmetic preparation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic preparation which has a dry sense of use and does not become greasy in hot summer conditions even when a silk powder is compounded. <P>SOLUTION: A modified silk powder is obtained by contacting a recrystallized silk powder having an α-structured fibroin with a lower alcohol and/or acetone to convert at least the surface of the powder into a β structure and spray-drying a slurry comprising a cranberry fruit extract and a solvent. The cosmetic preparation contains the modified silk powder. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention converts the surface of a recrystallized silk powder having fibroin having an α structure into a β structure using a lower alcohol and / or acetone, and spray-drys a slurry comprising a cranberry fruit extract and a solvent to thereby form silk. The present invention relates to a cosmetic which obtains silk powder with controlled crystallinity, cohesiveness and slipperiness of the powder surface, and has a light and dry feeling by blending the powder, and does not easily feel sticky even in the hot summer season.

Silk powder has long been used in cosmetics (Patent Documents 1, 2, and 3). For this reason, many techniques such as changing the particle shape and making the particles porous have already been used, and it seems that the technology has been almost completed.
JP-A-56-45661 JP-A-61-276825 JP-A-2-42010

  However, there has recently been a renewed review of silk technology in medicine and genetics, and new ways of using silk are being studied. Then, the present inventors examined whether a new function could not be obtained for silk powder.

  The present inventors studied the structure of existing silk powder, converted the surface of recrystallized silk powder having fibroin having α structure into β structure using lower alcohol and / or acetone, and extracted cranberry fruit extract. And, by spray drying a slurry consisting of a solvent, a silk powder with controlled crystallinity, cohesiveness and slipperiness on the surface of the silk powder is obtained. The present inventors have found that it is difficult to feel sticky even in the hot summer season and completed the present invention.

  That is, the present invention provides a slurry comprising a cranberry fruit extract and a solvent, while at least converting the powder surface to a β structure by contacting a recrystallized silk powder having fibroin having an α structure with a lower alcohol and / or acetone. Is a modified silk powder obtained by spray drying.

  A second aspect of the present invention is the above cosmetic, wherein the solvent is purified water.

  A third aspect of the present invention is a cosmetic comprising the modified silk powder described above.

The present invention converts the surface of the recrystallized silk powder having fibroin having the α structure to the β structure using lower alcohol or acetone, and spray-drys a slurry comprising a cranberry fruit extract and a solvent to obtain a silk powder surface. A silk powder with controlled crystallinity, cohesiveness and slipperiness is obtained, and by blending it, it is possible to obtain a cosmetic that has a light and dry feeling and a feeling that is not sticky even in the hot summer season. it is obvious.

  In the present invention, recrystallized silk powder having fibroin having an α structure is used as a raw material. The recrystallized silk powder referred to in the present invention corresponds to many commercially available recrystallized silk powders. The recrystallized silk powder often has some fibroin having an α structure (water-soluble structure), which gives a moist feeling when using the formulated cosmetic, but is a part of the cause of stickiness. As a method for producing a recrystallized silk powder, for example, it can be obtained by recrystallizing an aqueous silk fibroin solution obtained by scouring and dissolving silk fibers and then dialysis. Most of the recrystallized silk powder thus obtained has β-form (water-insoluble structure), but partially contains α-form. The proportion of α-form includes α-form in the range of 0.01 to 40% by mass, preferably 0.1 to 10% by mass. The ratio of α-form is most definitely determined by extracting hot water from silk powder and measuring its mass, but it is also possible to use an X-ray diffraction method or the like.

  In the present invention, the recrystallized silk powder used in the present invention may have any shape such as a spherical shape, a porous shape, and an irregular shape. The recrystallized silk powder used in the present invention can be used without any problem as long as it has a primary particle size of 0.5 to 30 μm.

  In the present invention, the surface of the recrystallized silk powder thus obtained is converted to a β structure using a lower alcohol and / or acetone. As the lower alcohol used in the present invention, one or two or more monohydric alcohols having 1 to 4 carbon atoms such as methyl alcohol, ethyl alcohol, isopropyl alcohol, and propyl alcohol can be used. Alcohols are preferred.

  In the present invention, the recrystallized silk powder and the lower alcohol and / or acetone are contacted and mixed so that the silk powder is uniformly wetted. The mixing ratio in such a state depends on the particle size of the silk powder, but generally ranges from 1: 0.5 to 1: 2 (mass ratio: silk powder: lower alcohol and / or lower alcohol). Or acetone). The contact time with lower alcohol and acetone is preferably 5 minutes to 24 hours, more preferably 5 minutes to 3 hours. Within this time range, only the surface can be converted to β-type, and an α-type can be left inside. The temperature for contact is preferably from 0 to 60 ° C, more preferably from 10 to 30 ° C. In this temperature range, operational safety is high, and the feel of the obtained powder is excellent. In the present invention, silk powder is slurried using a solvent and spray-dried. If a lower alcohol and / or acetone is used as the solvent, β-type can be obtained at the stage of slurrying without pre-β-formation. However, it is preferable to make β-form before slurrying in terms of cost, and in that case, a method of making slurry in a state containing lower alcohol and / or acetone is inexpensive. However, the lower alcohol and / or acetone can be removed by drying or the like.

In the present invention, the surface of the recrystallized silk powder is converted into a β structure, and a slurry comprising a cranberry fruit extract and a solvent is formed. The cranberry fruit extract may be added in advance when converting the surface of the recrystallized silk powder to the β structure, or may be added after the conversion. The cranberry (Vaccinium macrocarpon) used in the present invention is a member of the Japanese name "Tsurukokemo" of the azalea family. In the present invention, a pressed filtered cranberry fruit is used, and the pressed filtered material is a juice obtained by crushing and pressing a cranberry fruit, or a concentrate thereof. In order to reduce the viscosity of pectin, it is preferable to perform a pectin inactivation treatment. Further, as an extract of cranberry fruit, cranberry fruit, water, polyhydric alcohols such as 1,3-butylene glycol, propylene glycol, glycerin, diglycerin, ethanol, isopropyl alcohol, lower alcohols such as propyl alcohol, Solvents such as acetone, a mixed solvent thereof, preferably water, polyhydric alcohol, lower alcohol, a mixed solvent thereof, more preferably, an extract obtained by extraction with water such as hot water, hot water, and a concentrate thereof. is there. Examples of the form of the extract include an extract containing a solvent, a solvent-removed product, and the like. In the present invention, it is preferable to use a press-filtrate because the production of the raw material is easy and economical. The pressed cranberry fruit extract or extract used in the present invention may cause a problem of fading due to light depending on the production conditions. Therefore, the cranberry fruit pressed filtrate or extract is further subjected to gel filtration. It is preferably purified by a method or an ultrafiltration method. As a degree of purification, the content of anthocyanidins in the purified product is reduced to less than 0.5% by mass, preferably less than 0.1% by mass, based on the mass of the purified product having properties to be mixed with the cosmetic. Preferably. The purified cranberry mainly contains an anthocyanin polymer, and the molecular weight of the polymer is 30,000 or more, and tannin is substantially removed from the extract.

  In the present invention, the cranberry fruit extract thus obtained is preferably added in a range of 0.0001 to 5% by mass in terms of solid content in the cranberry fruit extract based on the mass of the recrystallized silk powder. Within this range, there is an advantage that a smooth feel improving effect can be strongly obtained.

  In the present invention, a slurry comprising the above-mentioned silk powder, cranberry fruit extract and a solvent is formed. Examples of the solvent used in the present invention include purified water, lower alcohol, hexane, ethyl acetate, toluene, acetone and the like, and purified water having high safety and easy granulation is preferred. As the mixing amount of the solvent, it is preferable to add the solvent in an amount of 50 to 1500 parts by mass with respect to 100 parts by mass of the recrystallized silk powder. It is also possible to add various oils, humectants, ultraviolet absorbers, resins, adhesives, physiologically active ingredients, etc. together with the solvent. In the present invention, among these, granulation and powdering can be performed without using a resin, a viscosity agent, an oil agent, or the like as a binder for granulating and powdering, or using purified water. By agglomerating together with the β-formation, agglomeration of the powder is prevented, and the feel of the powder and the feel of the cosmetic are improved.

Examples of the oil agent used in the present invention include, for example, avocado oil, linseed oil, almond oil, ibotaro wax, eno oil, olive oil, cocoa butter, kapok wax, kaya oil, carnauba wax, liver oil, candelilla wax, tallow, beef tallow, cow Bone fat, hardened beef tallow, ginger oil, whale wax, hardened oil, wheat germ oil, sesame oil, rice germ oil, rice bran oil, sugar cane wax, sasanqua oil, safflower oil, shea butter, cinnamon oil, cinnamon oil, jojoba wax, Shellac wax, turtle oil, soybean oil, teaseed oil, camellia oil, evening primrose oil, corn oil, lard, rapeseed oil, Japanese kiri oil, nukarou, germ oil, horse fat, persic oil, palm oil, palm kernel oil, castor oil Oil, hydrogenated castor oil, castor oil fatty acid methyl ester, sunflower oil, grape oil, bayberry wax, jojoba oil, macadamia nut oil, Beeswax, mink oil, cottonseed oil, cotton wax, mokuro, mokuro kernel oil, montan wax, coconut oil, hydrogenated coconut oil, tricoconut oil fatty acid glyceride, sheep fat, peanut oil, lanolin, liquid lanolin, reduced lanolin, lanolin alcohol, hard lanolin, Lanolin acetate, isopropyl lanolin fatty acid, hexyl laurate, POE lanolin alcohol ether, POE lanolin alcohol acetate, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, egg yolk oil and the like; hydrocarbon oils such as ozokerite, squalane, squalene, ceresin, Paraffin, paraffin wax, liquid paraffin, pristane, polyisobutylene, microcrystalline wax, petrolatum, etc .; higher fatty acids include lauric acid, myristic acid, Palmitic acid, stearic acid, behenic acid, undecylenic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), isostearic acid, 1
2-hydroxystearic acid or the like; higher alcohols include lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, hexadecyl alcohol, oleyl alcohol, isostearyl alcohol, hexyldecanol, octyldodecanol, cetostearyl alcohol, 2-decyltetradecinol, cholesterol, phytosterol, POE cholesterol ether, monostearyl glyceryl ether (bacyl alcohol), monooleyl glyceryl ether (seralkyl alcohol) and the like; ester oils include diisobutyl adipate and 2-hexyl decyl adipate , Di-2-heptylundecyl adipate, N-alkyl glycol monoisostearate, Isocetyl phosphate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, octane Cetyl acid, octyl dodecyl gum ester, oleyl oleate, octyl dodecyl oleate, decyl oleate, isononyl isononanoate, neopentyl glycol dicaprate, triethyl citrate, 2-ethylhexyl succinate, amyl acetate, ethyl acetate, butyl acetate, Isocetyl stearate, butyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate, cetyl lactate, myristyl lactate, isopropyl palmitate, palmitic acid 2 Ethylhexyl, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, cholesteryl 12-hydroxystearylate, dipentaerythritol fatty acid ester, isopropyl myristate, octyldodecyl myristate, 2-hexyldecyl myristate, myristyl myristate, Hexyldecyl dimethyloctanoate, ethyl laurate, hexyl laurate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, diisostearyl malate and the like; glyceride oils include acetoglyceryl, glyceryl triisooctanoate, triisostearin Acid glyceryl, glyceryl triisopalmitate, glyceryl monostearate, glyceryl di-2-heptylundecanoate, glyceryl trimyristate Ril, diglyceryl myristate isostearate, glycerin tri (caprylate / caprate), dimethylpolysiloxane, methylphenylpolysiloxane, fluorine-modified organopolysiloxane, alkyl-modified organopolysiloxane, amino-modified organopolysiloxane, amodimethicone, fluorine-modified dimethiconol , Silicone gum and the like. Of these, tri (caprylic / capric acid) glycerin and isononyl isononanoate are preferable because they have a large effect of improving the feel.

  Examples of the ultraviolet absorber used in the present invention include, for example, 2-ethylhexyl paramethoxycinnamate (alias: octyl paramethoxycinnamate), 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone- 5-sulfuric acid, 2,2'-dihydroxy-4-methoxybenzophenone, p-methoxyhydrocinnamic acid diethanolamine salt, paraaminobenzoic acid (hereinafter abbreviated as PABA), ethyldihydroxypropyl PABA, glyceryl PABA, homomenthyl salicylate, methyl- O-aminobenzoate, 2-ethylhexyl-2-cyano-3,3-diphenylacrylate, octyldimethyl PABA, octyl salicylate, 2-phenyl-benzimidazole-5-sulfate, triethanolamine salicylate, 3 -(4-methylbenzylidene) camphor, 2,4-dihydroxybenzophenine, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2-hydroxy -4-N-octoxybenzophenone, 4-isopropyldibenzoylmethane, butylmethoxydibenzoylmethane, octyltriazone, 4- (3,4-dimethoxyphenylmethylene) -2,5-dioxo-1-imidazolidinepropionic acid Examples thereof include 2-ethylhexyl, a polymer derivative thereof, and a silane derivative.

Examples of humectants include ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol,
Glycerin, diglycerin, polyglycerin, 3-methyl-1,3-butanediol, 1,3-butylene glycol, sorbitol, mannitol, glucose, sucrose, fructose, xylitol, lactose, maltose, maltitol, trehalose, mixed isomerism Saccharified sugar, sulfated trehalose, pullulan, raffinose and the like can be mentioned.

  Examples of the physiologically active ingredient include substances that give some physiological activity to the skin or hair when applied to the skin or hair. For example, anti-inflammatory agents, anti-aging agents, tightening agents, hair growth agents, hair restorers, moisturizers, blood circulation promoters, antibacterial agents, bactericides, desiccants, cooling agents, warming agents, vitamins, amino acids, wounds Examples include a healing promoter, a stimulant, an analgesic, a cell activator, and an enzyme component. Among them, natural plant extract components, seaweed extract components, and crude drug components are particularly preferable. In the present invention, it is preferable to mix one or more of these physiologically active ingredients. For example, Ashitaba extract, Avocado extract, Amacha extract, Altea extract, Arnica extract, Aloe extract, Apricot extract, Apricot kernel extract, Ginkgo extract, Turmeric extract, Oolong tea extract, Age extract, Echinacea leaf extract, Ohgon extract, Oubaku extract, Barley extract Extract, St. John's wort extract, Pondflower extract, Dutch mustard extract, orange extract, seawater dried product, hydrolyzed elastin, hydrolyzed wheat powder, hydrolyzed silk, chamomile extract, carrot extract, kawagomugi extract, calcade extract, kiwi extract, kina extract, cucumber Extract, Guanosine, Gardenia extract, Kumazasa extract, Clara extract, Walnut extract, Grapefruit extract, Clematis extract, Chlorella extract, Mulberry extract, Asian extract, black tea extract, yeast extract, burdock extract, fermented rice bran extract, rice germ oil, comfrey extract, collagen, lingonberry extract, psychin extract, psycho extract, Sai Thai extract, salvia extract, sabonso extract, sasa extract, hawthorn extract, Salamander extract, shiitake extract, radish extract, radish extract, perilla extract, linden extract, sycamore extract, peonies extract, shobu root extract, birch extract, horsetail extract, euphorbia serrata extract, Atlantic hawthorn extract, Atlantic elderberry extract, Acacia catechu extract Extract, sage extract, mallow extract, senkyu extract, assembly extract, soybean extract, syrup extract, thyme extract, chiyaya extract, chin Extract, Touki extract, Calendula extract, Tonin extract, Spruce extract, Dokudami extract, Tomato extract, Natto extract, Carrot extract, Garlic extract, Novara extract, Hibiscus extract, Bacmondou extract, Lotus extract, Parsley extract, Honey, Parietaria extract, Hikikoshi extract, bisabolol, coltsfoot extract, butterbur extract, budberry extract, butcher bloom extract, grape extract, propolis, loofah extract, safflower extract, peppermint extract, bodaige extract, button extract, hop extract, pine extract, mizubasho extract, mukuroji extract, peach extract , Cornflower extract, eucalyptus extract, saxifrage extract, yuzu extract, yokuinin extract, mugwort extract, lavender extract, Lettuce extract, lemon extract, astragalus extract, rose extract, Roman chamomile extract, royal jelly extract and the like can be mentioned.

Also, mucopolysaccharides, sodium hyaluronate, sodium chondroitin sulfate, collagen, elastin, chitin, chitosan, biomolecules such as hydrolyzed eggshell membranes, glycine, valine, leucine, isoleucine, serine, threonine, phenylalanine, arginine, lysine, Amino acids such as aspartic acid, glutamic acid, cystine, cysteine, methionine and tryptophan, hormones such as estradiol and ethenyl estradiol, amino acids, sodium lactate, urea, sodium pyrrolidonecarboxylate, moisturizing ingredients such as betaine and whey, sphingolipids, ceramides, Oil components such as cholesterol, cholesterol derivatives, phospholipids, ε-aminocaproic acid, glycyrrhizic acid, β-glycyrrhetinic acid, lysozyme chloride, guaia Anti-inflammatory agents such as dulen, hydrocortisone, allantoin, tranexamic acid, azulene, vitamin A, B2, B6, C, D, K, vitamin C glycoside, calcium pantothenate, biotin, nicotinamide, allantoin, diisopropylamine dichloro Acetate, active ingredients such as 4-aminomethylcyclohexanecarboxylic acid, α-hydroxy acids, cell activators such as β-hydroxy acids, blood circulation promoters such as γ-oryzanol, retinol, wound healing agents such as retinol derivatives, cepharanthin, Licorice extract, pepper tincture, hinokitiol, garlic iodide extract, pyridoxine hydrochloride, nicotinic acid, nicotinic acid derivatives, calcium pantothenate, D-pantothenyl alcohol, acetyl pantothenyl ethyl ether, biotin, allantoin Isopropylmethylphenol, estradiol, ethinylesteradiol, capronium chloride, benzalkonium chloride, diphenhydramine hydrochloride, tacanal, camphor, salicylic acid, nonylate vanillylamide, nonylate vanillylamide, pyroctonolamine, glyceryl pentadecanoate, l-menthol, camphor, etc. Cooling agents, mononitroguaiacol, resorcinol, γ-aminobutyric acid, γ-amino-β-hydroxybutyric acid, benzethonium chloride, mexiletine hydrochloride, auxin, female hormones, canthari tincture, cyclosporine, zinc pyrithione, hydrocortisone, peppermint oil, etc. Can be

  Examples of resins and resins include, for example, sodium polyacrylate, cellulose ether, calcium alginate, carboxyvinyl polymer, ethylene / acrylic acid copolymer, vinylpyrrolidone-based polymer, vinyl alcohol / vinylpyrrolidone copolymer, and nitrogen-substituted acrylamide-based Polymers, polyacrylamides, cationic polymers such as cationized guar gum, dimethylacrylammonium-based polymers, acrylic acid methacrylate acrylic copolymers, POE / POP copolymers, polyvinyl alcohol, pullulan, agar, gelatin, tamarind seed polysaccharides, Xanthan gum, carrageenan, high methoxyl pectin, low methoxyl pectin, guar gum, gum arabic, crystalline cellulose, arabinogalactan, karaya gum, tragacanth gum, Luginic acid, albumin, casein, curdlan, gellan gum, dextran, cellulose, polyethyleneimine, highly polymerized polyethylene glycol, cationized silicone polymer, synthetic latex, siliconized pullulan, trimethylsiloxysilicic acid, fluorinated polymethylsiloxysilicic acid, Acrylic silicone, polyamide-modified silicone, alkyl-modified silicone and the like can be mentioned.

  In the present invention, one or more of these components are preferably added in an amount of 0.001 to 10% by mass, particularly preferably 0.01 to 5% by mass in terms of dry mass, based on the mass of the silk powder. Within this range, the characteristics of the silk powder can be variously changed. In the case where an oil film is formed on the surface of the slurry, uniform spray-drying cannot be performed in the next step. Therefore, it is necessary to consider reducing the amount of addition.

  In the present invention, the solution thus slurried is granulated by spray drying and powdered. As a spraying method, a two-fluid nozzle or an atomizer may be used. The temperature in the dryer during spraying is preferably in the range of 160 to 240 ° C. If the secondary particle diameter after spraying is in the range of 1 to 100 μm, there is no problem. If the secondary particle diameter is larger than that, a feeling of incongruity appears at the time of blending the cosmetic. It is preferable that the secondary particle diameter finally falls within the range of 2 to 40 μm while using a sieve or the like in combination. In the cosmetic of the present invention, the modified silk powder thus obtained is preferably incorporated in an amount of preferably from 0.1 to 50% by mass, more preferably from 0.5 to 30% by mass, based on the total amount of the cosmetic.

  In the cosmetic of the present invention, the modified silk powder thus obtained is preferably blended with a makeup cosmetic, particularly a powder cosmetic such as a powder foundation and an eye shadow.

  In the cosmetic of the present invention, as the other components, various components used in the cosmetic, such as pigments, tackifiers, preservatives, fragrances, humectants, salts, solvents, antioxidants, chelating agents, and neutralizing agents It is possible to mix components such as a pH adjuster, an insect repellent, and a physiologically active component.

  Examples of the pigment used in the cosmetic of the present invention include titanium oxide, zirconium oxide, zinc oxide, cerium oxide, magnesium oxide, barium sulfate, calcium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, talc, mica, kaolin, and sericite. , Muscovite, synthetic mica, phlogopite, phlogopite, biotite, lithia mica, silicic acid, silicic anhydride, aluminum silicate, magnesium silicate, aluminum magnesium silicate, calcium silicate, barium silicate, strontium silicate , Metal tungstate, hydroxyapatite, vermiculite, heidilite, bentonite, montmorillonite, hectorite, zeolite, ceramic powder, dibasic calcium phosphate, alumina, aluminum hydroxide, boron nitride, boron nitride Silica, etc .; ultrafine titanium oxide, ultrafine zinc oxide, ultrafine cerium oxide, etc .; organic powders include polyamide powder, polyester powder, polyethylene powder, polypropylene powder, polystyrene powder, polyurethane powder, benzoguanamine powder, polymethylbenzoguanamine powder. , Polytetrafluoroethylene powder, polymethyl methacrylate powder, cellulose, silk powder, nylon powder, 12 nylon, 6 nylon, acrylic powder, acrylic elastomer, styrene / acrylic acid copolymer, divinylbenzene / styrene copolymer, vinyl resin , Urea resin, phenol resin, fluorine resin, silicon resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, microcrystal Fiber powder, starch powder, lauroyl lysine, etc .; surfactant metal salt powder (metal soap) includes zinc stearate, aluminum stearate, calcium stearate, magnesium stearate, zinc myristate, magnesium myristate, cetyl phosphate Zinc, calcium cetyl phosphate, sodium zinc cetyl phosphate, etc .; Colored pigments include inorganic red pigments such as iron oxide, iron hydroxide, and iron titanate; inorganic brown pigments such as γ-iron oxide; and inorganic pigments such as yellow iron oxide and loess. Inorganic black pigments such as yellow pigments, black iron oxide, and carbon black; inorganic purple pigments such as manganese violet and cobalt violet; inorganic green pigments such as chromium hydroxide, chromium oxide, cobalt oxide, and cobalt titanate; Of inorganic blue pigments, tar pigments, natural pigments Raked and synthetic resin powders obtained by compounding these powders; pearl pigments include titanium oxide-coated mica, titanium oxide-coated mica, bismuth oxychloride, titanium oxide-coated bismuth oxychloride, and titanium oxide-coated talc , Fish scale foil, colored mica coated with titanium oxide, etc .; as metal powder pigments, aluminum powder, copper powder, stainless steel powder, etc .; and as tar pigments, Red No. 3, Red No. 104, Red No. 106, Red No. 201, Red No. 202 No., Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 227, Red No. 228, Red No. 230, Red No. 401, Red No. 505, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Yellow No. 204, Yellow No. 401, Blue No. 1, Blue No. 2, Blue No. 201, Blue No. 404, Green No. 3, Color No. 201, Green No. 204, Green No. 205, Orange No. 201, Orange No. 203, Orange No. 204, Orange No. 206, Orange No. 207, etc .; Natural pigments include carminic acid, laccaic acid, calsamine, brassine, crocin, etc. And powders selected from the group consisting of: As these powders, those which have been subjected to compounding of the powder or treatment with a general oil agent, silicone oil, a fluorine compound, a surfactant or the like can be used as long as the effects of the invention are not impaired. For example, fluorine compound treatment, silicone resin treatment, pendant treatment, silane coupling agent treatment, titanium coupling agent treatment, oil agent treatment, N-acylated lysine treatment, polyacrylic acid treatment, metal soap treatment, amino acid treatment, inorganic compound treatment It may or may not have been previously surface-treated or modified by plasma treatment, mechanochemical treatment, or the like, and may use one or more surface treatments or modification treatments as necessary. be able to. In the present invention, one or more of these powders can be used in combination.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
Evaluation methods for various properties of each composition of the examples and comparative examples are shown below.

[Sensory property evaluation]
Ten specialized panelists were prepared for each evaluation item (however, panelists may be duplicated depending on the item), evaluated according to the evaluation criteria shown in Table 1, and evaluated as the total score of all panelists. Therefore, the higher the score, the higher the usefulness of the evaluation item is shown (full score: 50 points).

[Table 1]
Reference points
------------------------------------------
The effect feels high 5
The effect is felt 4
The effect is slightly felt 3
Only a slight effect 2
No effect 1

Example 1
To 320 parts by mass of purified water, 0.16 parts by mass of cranberry fruit extract was added, and 38.88 parts by mass of silk powder X (silk powder X, manufactured by Kanebo) and 40 parts by mass of ethanol were added to the mixture, and the mixture was well mixed. A uniform slurry was charged at a stretch. After stirring for 10 minutes, 160 parts by mass of purified water was added, and the mixture was further stirred for 10 minutes. Subsequently, 0.8 parts by mass of tri (caprylic / capric acid) glycerin was added, and stirring was continued for 30 minutes. The resulting slurry was spray-dried (200 ° C., spray pressure 6 kgf / cm ² ) to obtain 33.2 parts by mass of a modified silk powder.
In addition, the cranberry fruit extract was obtained by subjecting an undiluted juice obtained by squeezing and filtering cranberry fruit (manufacturer: MILNE FRUIT PRODUCTS, USA, trade name: cranberry concentrate) to ultrafiltration. One used. That is, 10 kg of the stock solution of cranberry juice was fractionated by pressurizing with a pump using Sartocon slice PSU-30K (fraction molecular weight: 30,000) manufactured by Sartorius. 400 g of the concentrated solution was washed five times with 400 g of a 10% ethanol solution to remove low molecular components. A purified cranberry extract obtained by adding 1600 g of 10% ethanol to the obtained purified cranberry concentrate was used. The anthocyanidin content of this purified cranberry extract was 0.01% by mass, the polyphenol content was 0.2% by mass, and the dry residue amount was 2.1% by mass.

Comparative Example 1
To 320 parts by mass of purified water, 38.88 parts by mass of silk powder X (silk powder X, manufactured by Kanebo Co.) and 40 parts by mass of ethanol were added, and a uniform slurry was added at once. After stirring for 10 minutes, 160 parts by mass of purified water was added, and the mixture was further stirred for 10 minutes. Subsequently, 0.8 parts by mass of tri (caprylic / capric acid) glycerin was added, and stirring was continued for 30 minutes. The resulting slurry was spray-dried (200 ° C., spray pressure 6 kgf / cm ² ) to obtain 32.5 parts by mass of a modified silk powder.

Example 2
A powder foundation was prepared according to the formulation and manufacturing method in Table 2. The talc treated with octylsilylated perfluoroalkyl phosphate was FOTS treated by Daito Kasei Kogyo. The unit of the amount in the table is% by mass.

[Table 2]
(Component A)
Modified silk powder (Production Example 1) 3.5
Octylsilylated iron oxide (yellow, red, black) 3.1
Octylsilylated perfluoroalkylphosphate ester salt treated talc Residual fluorinated pigment grade titanium oxide 8
Fluorine treated fine particle titanium oxide 2
Fluorine treated talc 20
Fluorinated sericite 10
Spherical polymethylsilsesquioxane 7
(Component B)
Dimethylpolysiloxane (6cs) 4
Octyl paramethoxycinnamate 2
α-Olefin oligomer 4
Preservative qs

[Production method]
After the component A was uniformly mixed, the component B, which was uniformly dissolved, was added and mixed, and the mixture was stamped on a metal plate using a mold to obtain a product.

Comparative Example 2
A product was obtained in the same manner as in Example 1 except that the original raw material, recrystallized silk powder (silk powder X manufactured by Kanebo Co., Ltd.) was used instead of the modified silk powder of Example 1.

Comparative Example 3
A product was obtained in the same manner as in Example 1 except that the modified silk powder of Comparative Example 1 was used instead of the modified silk powder of Example 1.

  The results of evaluating the examples and comparative examples are shown in Tables 3 and 4.

[Table 3]
[Results of sensory property evaluation (raw materials)]
Strong feeling of dryness
-------------------------------------------------- -
Example 1 43 38
Comparative Example 1 38 36
Untreated powder 22 17

[Table 4]
[Results of sensory property evaluation (product)]
There is no feeling of stickiness over time
-------------------------------------------------- --------------
Example 2 46 42
Comparative Example 2 30 31
Comparative Example 3 37 38

  From the results shown in Table 3, it can be seen that the present example has a stronger dry feeling than the comparative example. From the comparison with the comparative example and the untreated silk powder, it can be seen that the cranberry fruit extract enhances the smooth feeling. Also, from the results in Table 4, it can be seen that, in comparison with the comparative example, the present example has a light and dry feeling at the time of application, and is less sticky even when observed over time after application. In particular, Example 2 was found to have a strong characteristic of a smooth coating feeling.

  By blending the modified silk powder of the present invention, it is possible to provide a cosmetic that has a light and smooth feel and is less likely to feel sticky even in the hot summer season.

3 is an electron micrograph instead of a drawing, showing a form of the modified silk powder obtained in Example 1.

Claims (3)

By contacting the recrystallized silk powder having fibroin having the α structure with a lower alcohol and / or acetone, at least the surface of the powder is converted to the β structure, and a slurry comprising a cranberry fruit extract and a solvent is spray-dried. A modified silk powder characterized by being produced. The modified silk powder according to claim 1, wherein the solvent is purified water. A cosmetic comprising the modified silk powder according to claim 1 or 2.