JP2008266275A - Oil-in-water type cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil-in-water type cosmetic having fresh and refreshing sense of use peculiar to the oil-in-water type emulsion, enabling each active ingredient to be efficiently coated and held on the skin by enabling a water-soluble active ingredient to be carried by a hydrophilic powder, and enabling an oil-soluble active ingredient to be carried by the oil component, exhibiting excellent temporal stability even without containing a surfactant, and also usable as a spray product by being filled in a spray atomizer. <P>SOLUTION: The oil-in-water type cosmetic contains (a) cellulose fine particles having a ≤10 μm average particle diameter, (b) the water-soluble and/or oil-soluble active ingredient and (c) a hydrophilic powder. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an oil-in-water cosmetic comprising (a) cellulose fine particles having an average particle diameter of 10 μm or less, (b) a water-soluble or / and oil-soluble active ingredient, and (c) a hydrophilic powder. More specifically, it has a feeling of use peculiar to a fresh, refreshing oil-in-water emulsion, and a water-soluble active ingredient is supported by a hydrophilic powder, and an oil-soluble active ingredient is supported by an oil component. Oil-in-water cosmetics that can be applied and retained on the skin efficiently, show excellent stability over time without containing a surfactant, and can be used as a spray product by filling a spray device. It is about the fee.

  Conventionally, oil-in-water cosmetics have a continuous phase composed of an aqueous component, so that the oily film after application is moist and moisturized while having a fresh and refreshing feeling. Therefore, it has been widely used in emulsions, creams, foundations, sunscreen cosmetics and the like. On the other hand, spray products are applied to various products such as skin care products and hair care products because of their unique feeling of use and ease of application. In many cases, spray products are filled into spray devices from the viewpoint of sprayability. What was done was a low viscosity liquid aqueous composition. Therefore, in order to apply an oil-in-water emulsion to a spray product, a cosmetic is proposed that applies a high thixotropic property of a dispersion of cellulose fine particles that quickly reduces the viscosity with low stress (Japanese Patent Application Laid-Open No. WO06 / 061043). .

  However, although the oil-in-water emulsion obtained from the cellulose fine particles is excellent in spray sprayability, it has not yet been sufficiently satisfactory in terms of usability and moisture retention. Accordingly, the present invention has been made to solve such problems, and has a fresh and refreshing feeling unique to an oil-in-water emulsion, and a water-soluble active ingredient is supported by a hydrophilic powder. The oil-soluble active ingredient is supported by the oil, so that any active ingredient can be efficiently applied and retained on the skin, and exhibits excellent aging stability even if it does not contain a surfactant. The present invention relates to an oil-in-water cosmetic that can be filled in a device and used as a spray product. It is intended to provide.

  Therefore, as a result of intensive studies, the present inventors have found that (a) cellulose fine particles having an average particle diameter of 10 μm or less (b) water-soluble and / or oil-soluble active ingredient (c) hydrophilic powder is blended. It has a feeling of use peculiar to a refreshing oil-in-water emulsion, and a water-soluble active ingredient is supported by hydrophilic powder, and an oil-soluble active ingredient is supported by oil, so that any active ingredient is on the skin. To develop an oil-in-water cosmetic that can be applied and retained efficiently, exhibits excellent stability over time even without surfactants, and can be used as a spray product by filling a spray spray device. Successful. In addition, (a) cellulose fine particles are derived from plants, and have also been found to be safe for the living body and have good affinity with the skin.

      That is, the present invention comprises (a) cellulose fine particles having an average particle diameter of 10 μm or less, (b) a water-soluble and / or oil-soluble active ingredient, and (c) a hydrophilic powder, so that the water is fresh and refreshing. It has a feeling of use peculiar to oil-type emulsions, and water-soluble active ingredients are carried by hydrophilic powder, and oil-soluble active ingredients are carried by oil, so that any active ingredient can be efficiently applied onto the skin. The present invention relates to an oil-in-water cosmetic that can be retained and exhibits excellent aging stability even when it does not contain a surfactant, can be filled in a spray spraying device, and can also be used as a spray product.

  As described above, (a) by blending cellulose fine particles having an average particle size of 10 μm or less, it has a fresh and refreshing feeling unique to an oil-in-water emulsion, and (b) water-soluble or / In addition, various functions such as moisture retention can be imparted by blending an oil-soluble active ingredient, (c) a water-soluble active ingredient is supported by a hydrophilic powder, and an oil-soluble active ingredient is supported by an oil component. Therefore, any active ingredient can be efficiently applied and retained on the skin, and (a) the emulsifying performance of the cellulose fine particles exhibits excellent temporal stability even if it does not contain a surfactant, with low stress. It is clear that oil-in-water cosmetics that can be filled into a spray spray device and used as a spray product can be obtained due to the high thixotropic property of quickly reducing the viscosity. In addition, (a) cellulose fine particles are made from plants, and can give an effect of being safe for a living body and having good affinity with skin.

Hereinafter, the present invention will be described in detail.
The cellulose fine particles (a) used in the present invention have an average particle size of 10 μm or less, preferably 1 μm or less, and can be obtained as a gelled cellulose / water dispersion using the method described in WO2004 / 0610043. it can. The gel-like material thus obtained was diluted to 1.5 wt% with ion-exchanged water and subjected to a dispersion treatment at 12000 rpm for 20 minutes using a homomixer (Mizuho Industrial Co., Ltd., LR-1). The average particle size when the dispersion obtained was measured using a laser diffraction particle size distribution analyzer (COULTER, N4Plus) was 0.13 μm. Moreover, as a commercial item, Serodine 4M [Daiichi Kogyo Seiyaku Co., Ltd.] which is an aqueous dispersion can be used. Since the cellulose fine particles retain the emulsifying performance, an oil-in-water emulsion exhibiting excellent stability over time can be prepared even if it does not contain a surfactant. Moreover, since the high thixotropy property of rapidly reducing the viscosity with a low stress is maintained, an oil-in-water cosmetic that can be filled into a spray spray device and used as a spray product can be obtained. Furthermore, it is made from plant materials, is safe for living bodies, and has excellent compatibility with the skin.

  Examples of (b) water-soluble and / or oil-soluble active ingredients used in the present invention include vitamin C (whitening effect), vitamin A (skin aging prevention / anti-wrinkle effect), and yeast / yeast extract containing β-glucan. Fluid (skin immune function activity / anti-wrinkle effect), linoleic acid (whitening and moisturizing effect), glycolic acid, lactic acid, malic acid, salicylic acid and other α- or β-hydroxy acids (skin dullness, wrinkle reducing effect), Examples include native collagen and derivatives thereof (succinyl collagen, myristyl succinyl collagen, etc.) (moisturizing effect, anti-wrinkle effect) and the like. In addition, it is also possible to use these active ingredients in combination.

  As the powder of (c) hydrophilic powder used in the present invention, a conventionally known powder can be used, and its shape (spherical, rod-like, needle-like, plate-like, irregular shape, scale-like, spindle-like, etc.) Any particle size (smoke, fine particles, pigment grade, etc.) and particle structure (porous, nonporous, etc.) can be used. For example, inorganic powder, organic powder, surfactant Examples thereof include metal salt powder, colored pigment, pearl pigment, and metal powder pigment. The powder surface is preferably treated with hydrophilicity, and examples thereof include cellulose treatment, agar treatment, deoxyribonucleic acid treatment, lecithin treatment, polyacrylic acid treatment, silica treatment, alumina treatment or zirconia treatment. It is possible to use 1 or more types in combination.

  Among the above hydrophilic powders, potassium cellulose succinate, which is spherical cellulose derivative particles, is particularly excellent in the feeling of use and moisture retention of the obtained oil-in-water emulsion. As a commercial product, MOISCELL PW D-5 [manufactured by Daito Kasei Kogyo Co., Ltd.] can be used. This potassium succinate cellulose has excellent usability due to its spherical shape, and its surface has been treated with potassium succinate, so that it has excellent moisturizing properties, in particular, the active ingredient retention time. In addition, (a) it was excellent in compatibility with cellulose fine particles, was made from plants, was safe for the living body, and had the effect of having good affinity with the skin.

  In the oil-in-water cosmetics of the present invention, oils, surfactants, preservatives, fragrances, moisturizers, ultraviolet absorbers, salts, solvents, resins, antioxidants, chelating agents, Various components such as a hydrating agent, a pH adjusting agent, an insect repellent, and a physiologically active component can be used as long as the object of the present invention is not impaired.

  Examples of oils include avocado oil, linseed oil, almond oil, ibotarou, eno oil, olive oil, cacao butter, kapok wax, kaya oil, carnauba wax, candelilla wax, kyounin oil, hydrogenated oil, wheat germ oil, sesame oil, rice Germ oil, rice bran oil, sugarcane wax, sasanqua oil, safflower oil, shea butter, cinnamon oil, cinnamon oil, jojoballow, shellac oil, turtle oil, soybean oil, tea seed oil, camellia oil, evening primrose oil, corn oil, rapeseed Oil, Japanese Kiri oil, Nukarou, Germ oil, Persic oil, Palm oil, Palm kernel oil, Castor oil, Hardened 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, owl, owl kernel oil, montan wax Coconut oil, hydrogenated coconut oil, tricoconut oil fatty acid glyceride, peanut oil, lanolin, liquid lanolin, reduced lanolin, lanolin alcohol, hard lanolin, lanolin acetate, lanolin fatty acid isopropyl, hexyl laurate, POE lanolin alcohol ether, POE lanolin alcohol acetate, Lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, egg yolk oil, etc .; hydrocarbon oils such as ozokerite, squalane, squalene, ceresin, paraffin, paraffin wax, liquid paraffin, pristane, polyisobutylene, microcrystalline wax, petrolatum, etc .; high grade Examples of fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, untecilenic acid, oleic acid, linoleic acid, Nolenic acid, arachidonic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA), isostearic acid, 12-hydroxystearic acid, etc .; higher alcohols include lauryl alcohol, myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol, hexa Decyl alcohol, oleyl alcohol, isostearyl alcohol, hexyl decanol, octyldodecanol, cetostearyl alcohol, 2-decyltetradecinol, cholesterol, phytosterol, POE cholesterol ether, monostearyl glycerol ether (batyl alcohol), monooleyl glyceryl ether (Ceracyl alcohol), etc .; As ester oils, diisobutyl adipate, 2-adipate 2- Hexyldecyl, di-2-heptylundecyl adipate, N-alkyl glycol monoisostearate, isocetyl isostearate, isononyl isononanoate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, 2-ethylhexane Cetyl acid, trimethylolpropane tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, cetyl octanoate, octyldodecyl gum ester, oleyl oleate, octyldodecyl 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, 2-ethylhexyl palmitate, 2-hexyldecyl palmitate, 2-heptyl undecyl 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-glutamate-2- Octyldodecyl ester, diisostearyl malate, etc .; glyceride oils include acetoglyceryl, glyceryl triisooctanoate, triisostearate Seryl, tri (capryl / capric acid) glycerin, glyceryl triisopalmitate, glyceryl monostearate, glyceryl di-2-heptylundecanoate, glyceryl trimyristate, diglyceryl myristate; diglyceryl myristate; Examples include siloxane, biphenylsiloxane, decamethylcyclopentasiloxane, methyltrimethicone, alkyl-modified silicone, and fluorosilicone. Also included are polyhydric alcohols such as glycerin, isoprene glycol, 1,3-butylene glycol, dipropylene glycol, propylene glycol, diglycerin, maltitol, and malbit liquid.

    As the cosmetic of the present invention, it can be applied to any cosmetics such as skin care cosmetics, makeup cosmetics, sunscreen cosmetics, and hair cosmetics. Examples include skin care cosmetics.

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

[Examples 1-2, Comparative Examples 1-2]
An oil-in-water cream was obtained according to the formulation and production method shown in Table 1. The unit in the table is% by mass.

Evaluation item 10 female panelists were asked to use the test product, and the spray sprayability, feeling of use, and moist feeling were answered in a questionnaire format. It was set as a point, and it was set as the evaluation result by the average score of the panel. Therefore, the higher the score, the better the evaluation.

Claims (4)

  (A) A cellulose fine particle having an average particle size of 10 μm or less, (b) a water-soluble and / or oil-soluble active ingredient, and (c) a hydrophilic powder, an oil-in-water cosmetic.   The oil-in-water cosmetic according to claim 1, wherein the cosmetic according to claim 1 is a spray composition.   The oil-in-water cosmetic according to claim 1 or 2, which does not contain a surfactant.   (C) The oil-in-water cosmetic according to any one of claims 1 to 3, wherein the hydrophilic powder is spherical cellulose derivative particles.