JPWO2019117226A1 - Water-in-oil emulsified cosmetics - Google Patents

Abstract

Although it is a water-in-oil emulsified cosmetic, it has a sherbet-like appearance that gives a refreshing feeling, and when applied to the skin, it has a new feeling of use that gives a smooth powder feeling. The purpose is to provide a fee. The present invention contains (a) 0.5 to 10% by mass of oil-absorbing silicone elastomer, (b) 3 to 15% by mass of oil-absorbing silicone powder, (c) liquid oil, and (d) water, and is a sherbet. The present invention relates to a water-in-oil emulsified cosmetic, which is characterized by exhibiting a shape-like appearance.

Description

The present invention relates to a water-in-oil emulsified cosmetic having a sherbet-like appearance. More specifically, the present invention relates to a water-in-oil emulsified cosmetic having a new and unique feeling of use, which has a sherbet-like appearance but changes into a powder having a smooth feel when applied to the skin.

"Sherbet" generally means a frozen dessert with agitated fruit juice or sugar water. Sherbet consists of ice blocks, and you can enjoy a cold and refreshing taste by crushing it with a spoon or the like and putting it in your mouth. Therefore, a cosmetic having a sherbet-like appearance (sherbet-like appearance) visually gives a refreshing feeling by evoking the sensation when the user actually touches the sherbet or eats the sherbet. be able to.

When the aerosol composition described in Patent Document 1 is injected from an aerosol container, it freezes due to the latent heat of vaporization accompanying the volatilization of the propellant and becomes sherbet-like. That is, since this composition actually freezes into a sherbet-like shape, it gives a refreshing feeling not only visually but also tactilely.

Patent Document 2 describes that a cosmetic dosage form similar to sherbet could be produced with a composition containing sodium polyacrylate and a water-soluble thickener such as cellulose gum. However, Patent Document 2 does not mention a visual effect based on an appearance similar to sherbet, and only evaluates the soft physical properties and peeling effect of the composition. Further, what is actually prepared in Patent Document 2 is an oil-in-water emulsified cosmetic (packing agent) containing a large amount of water, and a water-in-oil emulsified cosmetic is not described.

Patent Document 3 describes a solid water-in-oil emulsified cosmetic having a sherbet-like feel when used. However, the appearance of the cosmetic is not sherbet-like, and only gives a crispy sherbet-like feel when used. In addition, since the cosmetic of Patent Document 3 contains a refreshing agent such as menthol, a refreshing feeling can be obtained, but since solid oil is an essential ingredient, the feel when applied to the skin is heavy and the powder is smooth. It is presumed that no feeling can be obtained.

Japanese Unexamined Patent Publication No. 11-5715 Special Table 2013-544280 Japanese Unexamined Patent Publication No. 2000-351712

Although the present invention is a water-in-oil emulsion, it is a novel oil that not only has a sherbet-like appearance that visually gives a refreshing feeling, but also gives a smooth powder feeling when applied to the skin. The purpose is to provide a medium-water emulsified cosmetic.

As a result of diligent studies to solve the above problems, the present inventor has blended an oil-absorbing silicone elastomer and an oil-absorbing silicone powder in combination to prepare the silicone elastomer and / or silicone in a water-in-oil emulsified cosmetic. The present invention has been completed by finding that a novel cosmetic having a sherbet-like appearance and a smooth powder-like feel when used can be obtained by allowing the powder to absorb a liquid oil component.

That is, the present invention
(A) 0.5 to 10% by mass of oil-absorbing silicone elastomer,
(B) 3 to 15% by mass of oil-absorbing silicone powder,
Provided is a water-in-oil emulsified cosmetic containing (c) a liquid oil component and (d) water and exhibiting a sherbet-like appearance.

The water-in-oil emulsified cosmetic of the present invention is a water-in-oil emulsified cosmetic that can contain an oil having an emollient effect, yet has a sherbet-like appearance that visually gives a refreshing feeling, and is applied to the skin. When it is used, it has a new and unique feel that gives a smooth powdery feel.

The water-in-oil emulsified cosmetic of the present invention (hereinafter, also simply referred to as “cosmetic of the present invention”) is (a) an oil-absorbing silicone elastomer, (b) an oil-absorbing silicone powder, and (c) the component (a). And / or contains liquid oil absorbed in (b) and (d) water.

(A) Oil-absorbing Silicone Elastomer The "oil-absorbing silicone elastomer (component a)" in the cosmetic of the present invention is a crosslinked amorphous silicone elastomer. More specifically, it is a silicone elastomer having a three-dimensional structure in which the silicone main chain is crosslinked with an alkylene chain or a polyoxyalkylene chain.

The silicone chain (main chain) of the oil-absorbing silicone elastomer has a polysiloxane skeleton composed of dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc., and may be modified by alkyl modification, polyether modification, or the like. .. The crosslinked portion is preferably a polyoxyalkylene (polyether) chain such as polypropylene glycol (PPG), polyethylene glycol (PEG), or polybutylene glycol (PBG).

The oil-absorbing silicone elastomer in the cosmetic of the present invention may be blended in the form of a paste dispersed in oil. The oil to be dispersed is not particularly limited, but is, for example, a cyclic silicone oil such as cyclopentasiloxane, a linear or branched silicone oil such as dimethicone, methyltrimethicone, or diphenylsiloxyphenyltrimethicone, mineral oil, and isododecane. , Squalane and other hydrocarbon oils.

Commercially available products in the form of a paste containing an oil-absorbing silicone elastomer include, for example, EL-7040 (PEG-12 dimethicone / PPG-20 crosspolymer; caprylyl methicone), EL-8050 ID (PEG-12 dimethicone / PPG). -20 crosspolymer; isododecane), EL-8051 IN (PEG-12 dimethicone / PPG-20 crosspolymer; isodecyl neopentanoate), EL-8052 IH (PEG-12 dimethicone / PPG-20 crosspolymer; isohexadecane), 9040 (Dimethicon crosspolymer; Cyclopentasiloxane), 9045 (Dimethicon crosspolymer; Cyclopentasiloxane), 9240 (Dimethicon crosspolymer; Dimethicon (2cs)), and 9041 (Dimethicon crosspolymer; Dimethicon (5cs)) [above, Toray. Dow Corning], KSG-042Z (laurylpolydimethylsiloxyethyl dimethicone / bisvinyl dimethicone crosspolymer; isododecane), KSG-045Z (laurylpolydimethylsiloxyethyl dimethicone / bisvinyl dimethicone crosspolymer; cyclopentasiloxane), KSG- 320Z (PEG-15 / laurylpolydimethylsiloxyethyl dimethicone crosspolymer; isododecane), KSG-350Z (PEG-15 / laurylpolydimethylsiloxyethyl dimethicon crosspolymer; cyclopentasiloxane), KSG-15 (dimethicone / vinyldimethicone crosspolymer) Cyclopentasiloxane), KSG-16 (dimethicone / vinyl dimethicone crosspolymer; dimethicone), KSG-18A (dimethicone / phenylvinyldimethicone crosspolymer; diphenylsiloxyphenyltrimethicone), KSG-210 (dimethicone / PEG-10 / 15) Crosspolymer; Dimethicone), KSG-310 (PEG-15 / Lauryl Dimethicone Crosspolymer; Mineral Oil), KSG-710 (Dimethicone / Polyglycerin-3 Crosspolymer; Dimethicone), and KSG-830 (Lauryl Dimethicone / Polyglycerin- 3) Cross-polymer; trioctanoin) [above, manufactured by Shin-Etsu Chemical Industry Co., Ltd.] and the like, but are not limited thereto. The above parentheses mean (elastomer name; medium).

The amount of the (a) oil-absorbing silicone elastomer in the cosmetic of the present invention is 0.5 to 10% by mass, preferably 0.6 to 8% by mass, more preferably 0.6 to 8% by mass, based on the total amount of the cosmetic. Is 0.7 to 6% by mass. If the blending amount is less than 1% by mass, the feeling of use is not smooth, and if the blending amount exceeds 10% by mass, the sherbet-like appearance may not be obtained.

(B) Oil-absorbing Silicone Powder The "oil-absorbing silicone powder (component b)" in the cosmetic of the present invention is a powder made of a silicone elastomer having a three-dimensional structure in which the polysiloxane main chain is crosslinked. Component b is a powder having a definite shape such as a spherical shape, and is distinguished from an amorphous silicone elastomer (component a).
As the oil-absorbing silicone powder of the present invention, a silicone elastomer powder in which both the main chain and the crosslinked portion are composed of silicone chains is preferably used. Further, it is also possible to use a form in which silicone powder is dispersed in a medium. Examples of commercially available oil-absorbing silicone powders include Toray Dow Corning's Trefil series (Trefil E-505C, Trefil E-506C, Trefil E-506S, Trefil E-505W, etc.).

The shape of the oil-absorbent silicone powder of the present invention is not particularly limited, but spherical, true spherical, and elliptical powders are preferably used. The average particle size of the oil-absorbent silicone powder is not particularly limited, but is preferably 0.1 to 100 μm, preferably 1 to 50 μm. Further, the oil-absorbing silicone powder is preferably a spherical powder having elasticity of, for example, JIS A hardness (rubber hardness) of 20 to 100, preferably 30 to 80.

The blending amount of the oil-absorbing silicone powder (b) in the cosmetic of the present invention is 3 to 15% by mass, preferably 4 to 12% by mass, and more preferably 5 to 10% by mass with respect to the total amount of the cosmetic. .. If the blending amount is less than 3% by mass, a sherbet-like appearance is not obtained, and if the blending amount exceeds 15% by mass, a smooth feeling of use may not be obtained.

The "oil absorption" of the oil-absorbing silicone elastomer (component a) and the oil-absorbing silicone powder (component b) blended in the cosmetic of the present invention is, for example, oil absorption measured according to JIS K-5101 (oil absorption amount). It can be defined by quantity.

For example, using silicone oil (low to medium viscosity dimethicone; for example, "SH200C-5CS", manufactured by Toray Dow Corning), precisely glass 1 g of sample (silicone elastomer or silicone powder) according to JIS K-5101. Weigh on a plate, add silicone oil little by little to the center of the sample, and knead with a spatula to make it uniform each time. Then, the whole becomes a paste, and the end point is just before fluidization, and the amount of silicone oil added up to that point is taken as the oil absorption amount. The unit of oil absorption is calculated by the following formula as the oil absorption per 100 g of the sample.

In the present invention, a sample having an oil absorption amount of 200 g / 100 g or more calculated according to the above formula from the measurement using dimethicone having a viscosity of 5 cSt is defined as "oil absorption property".

In the cosmetic of the present invention, the blending amount ratio ((a): (b)) of (a) the blending amount of the silicone elastomer and (b) the blending amount of the silicone powder is within the range of 10: 1 to 1:10. It is preferably in the range of 2: 1 to 1: 8, and even more preferably 1: 1 to 1: 7.

(C) Liquid oil The liquid oil (component c) blended in the cosmetic of the present invention is a liquid oil at room temperature (25 ° C.), and is a hydrocarbon oil, an ester oil, a silicone oil, or a liquid oil used in cosmetics. Etc. can be selected.
The liquid oil component in the present invention contains at least one liquid oil component that is absorbed by either or both of the component a (oil-absorbing silicone elastomer) and the component b (oil-absorbing silicone powder). The "absorbed liquid oil" is a liquid in which the "oil absorption amount" (value defined by the above formula) of the component a or the component b with respect to the liquid oil is 100 g / 100 g or more, preferably 200 g / 100 g or more. It means oil.
Specific examples of the liquid oil content preferably used in the present invention are as follows.

Examples of the hydrocarbon oil include liquid paraffin, squalane, squalene, paraffin, isoparaffin, selecin, isohexadecane, isododecane and the like.

Ester oils include pentaerythrityl tetraethylcaproate, cetyl ethylcaproate, jojoba oil, di (phytosteryl / octyldodecyl) lauroyl glutamate, triisostea, glyceryl diisostearate, triethylhexanoin, dimer dilinoleic acid (phytosteryl / behenic acid). , Dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / stearyl / behenyl), isopropyl palmitate, macadamia nut fatty acid phytosteryl, tetra (behenic acid / benzoic acid / ethyl caproic acid) pentaerythrityl, ethylhexyl palmitate, myristyl myristate , Isopropyl myristate, tripropylene glycol dipivalate, diisopropyl sebacate, isodecyl neopentanoate and the like can be exemplified.

Examples of the silicone oil include chain silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane, and cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and dodecamethylcyclohexasiloxane. Will be done.

Liquid fats and oils include flaxseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, southern ka oil, castor oil, saflower oil, rapeseed oil, soybean oil, peanut oil, triglycerin, trioctanoic acid. Examples thereof include glycerin and glycerin triisopalmitate.

The liquid oil component in the present invention also includes an ultraviolet absorber that is liquid at room temperature. Examples of the ultraviolet absorber include octylmethoxynenamete, octocrylene, polysilicone-15, bisresolcinyltriazine, ethylhexyltriazine, diethylaminohydroxybenzoylhexyl benzoate, and oxybenzone-3.

In the cosmetic of the present invention, a plurality of liquid oils may be blended in combination, and it is preferable to blend at least one volatile liquid oil. The volatile liquid oil content can be selected from volatile hydrocarbon oils such as isododecane, and volatile silicone oils such as low viscosity (5 sc or less) chain silicone oils and cyclic silicone oils. Above all, it is particularly preferable to blend volatile silicone oil.

The blending amount of the liquid oil (component c) in the cosmetic of the present invention is not particularly limited, but is preferably 5 to 50% by mass, more preferably 10 to 40% by mass, based on the total amount of the cosmetic.
Further, it is preferable that the ratio of the volatile liquid oil content to the total amount of the liquid oil content is 50% by mass or more.

(D) Water The water (component d) in the cosmetic of the present invention is a component constituting the internal phase of the water-in-oil emulsified cosmetic.
The blending amount of water (component d) in the cosmetic of the present invention is not particularly limited, but is 40% by mass or less, preferably 35% by mass or less, and more preferably 30% by mass or less with respect to the total amount of the cosmetic. The lower limit of the blending amount is, for example, 5% by mass or more, preferably 8% by mass or more, and more preferably 10% by mass or more.

The cosmetic of the present invention is a water-in-oil emulsified cosmetic that exhibits a sherbet-like appearance by combining the essential ingredients (a) to (d). In the cosmetic of the present invention, the hardness (hardness measured using a rheometer (11.3φ, 3 mm needle) at 25 ° C.) is preferably 3 to 40. Further, the point where the ratio (G "/ G'= tanδ) of the storage elastic modulus (G') and the loss elastic modulus (G") is 1 has viscoelasticity in the range of strain 1 to 10%. It is preferable to prepare. By having the hardness and viscoelasticity as described above, not only the appearance but also the tactile sensation is similar to that of sherbet.

The cosmetic of the present invention can visually give a refreshing feeling from the sherbet-like appearance. Further, if (e) a cooling sensation component is added to the cosmetic of the present invention, it is possible to realize a refreshing sensation accompanied by a smooth powder sensation at the time of use.
The (e) cooling sensation component (cooling agent) used in the present invention is not particularly limited as long as it is a cooling sensation component that can be usually blended in cosmetics. , Vanylbutyl ether (VBE), camphor, mint and the like.

The cosmetic of the present invention can contain other optional ingredients usually blended in cosmetics and the like within a range that does not impair the effects of the present invention. Other optional components include, but are not limited to, moisturizers (including glycols such as 1,3-butylene glycol and propylene glycol), lower alcohols (ethanol, propanol, etc.), thickeners, powders ((b) oil absorbing). (Excluding sex silicone powder), natural or synthetic polymers, sugars or sugar alcohols, antioxidants, buffers, various extracts, stabilizers, preservatives, pigments, fragrances and the like.

The cosmetic of the present invention can be produced according to a conventional method for water-in-oil emulsified cosmetics. However, (a) oil-absorbing silicone elastomer, (b) oil-absorbing silicone powder, and (c) liquid oil (which is absorbed by component a or component b) are mixed in advance to form a mixture, and water in oil prepared separately. It is preferable to prepare by adding the mixture to a mold emulsion (cream base) and stirring it arbitrarily.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. Unless otherwise specified, the blending amount represents mass% with respect to the total amount.

A water-in-oil emulsified cosmetic (cream base) was prepared with the composition shown in Table 1 below.

The raw materials shown in Table 2 below were mixed and stirred to prepare a mixture. The blending amount values shown in Tables 1 and 2 are mass% of the total amount of the cream base of Table 1 and the mixture of Table 2 combined.

The cosmetics (Examples 1 to 19) obtained by adding the mixture of Table 2 to the cream base of Table 1 all have a sherbet-like appearance, and when applied, they give a smooth powdery feeling. Gave. In addition, the blended cooling sensation agent gave a cold touch to the applied skin.
Tables 3 and 4 show the values of hardness (11.3φ) of each cosmetic. In all the examples, the hardness was in the range of 3 to 40, and the tactile sensation was also reminiscent of sherbet.

Next, the following cosmetics were prepared by changing the amount of the cream base and the amount of the silicone elastomer in Table 1 (Table 5).

The cosmetics of Examples A, B and C all had a sherbet-like appearance and gave a smooth powdery feeling when applied. On the other hand, in Comparative Example D in which the oil-absorbing silicone elastomer was not blended, the appearance was similar to that of sherbet, but it crumbled and crumbled, and a smooth powder feeling could not be obtained. Comparative Example E in which the oil-absorbing silicone powder was not blended did not have a sherbet-like appearance.

Claims (7)

(A) 0.5 to 10% by mass of oil-absorbing silicone elastomer,
(B) 3 to 15% by mass of oil-absorbing silicone powder,
Contains (c) liquid oil and (d) water,
A water-in-oil emulsified cosmetic characterized by having a sherbet-like appearance. The cosmetic according to claim 1, wherein the liquid oil (c) contains a volatile oil. The cosmetic according to claim 2, wherein the volatile oil contains a volatile silicone oil. The cosmetic according to any one of claims 1 to 3, wherein the silicone elastomer (a) has a structure in which a silicone chain is crosslinked with a polyether. Any of claims 1 to 4, wherein the ratio of (a) the blended amount of the silicone elastomer to (b) the blended amount of the silicone powder ((a): (b)) is in the range of 10: 1 to 1:10. The cosmetics listed in item 1. (D) The cosmetic according to any one of claims 1 to 5, wherein the blending amount of water is 40% by mass or less. (E) The cosmetic according to any one of claims 1 to 6, further containing a cooling sensation component.