JP2022125619A - Liquid oleaginous cosmetic - Google Patents

Abstract

To provide a liquid oleaginous cosmetic with good redispersion of hydrophobic silica powder.SOLUTION: A cosmetic includes the following components (a)-(c): (a) 5.0-60 mass% of a volatile silicone oil; (b) 0.1-10 mass% of hydrophobic silica powder; and (c) 0.05-5.0 mass% of polyglycerol-modified silicone represented by formula (I). In formula (I), R1 represents a C1-12 straight-chain or branched-chain alkyl group or phenyl group, R2 represents a C2-11 alkylene group, p is a number from 10 to 120, and q is a number from 1 to 11.SELECTED DRAWING: None

Description

TECHNICAL FIELD The present invention relates to a liquid oily cosmetic containing an oil-absorbing powder, and more particularly to a liquid oily cosmetic using hydrophobically treated silica powder as the oil-absorbing powder.

Liquid oil-based cosmetics in which the oil phase forms a continuous phase, such as water-in-oil compositions, are widely used as cosmetics, and are particularly effective for sunscreens and base makeup because of their excellent long-lasting effect. Suitable for use as a toner or foundation.

In general, in liquid oily cosmetics, the viscosity is adjusted to be low for the purpose of improving feel in use such as good spreadability and ease of application. However, especially in cosmetics with low viscosity, the powder or the like may settle and become non-uniform. In such a case, it is necessary to take measures to prevent the powder from settling even if the viscosity is low (Patent Document 1), or re-disperse the settling powder by shaking the container immediately before using the cosmetic. A method is used in which the composition is returned to a uniform state and applied (Patent Document 2).

In addition, various powders are used in cosmetics depending on the purpose, and for the purpose of preventing makeup collapse due to sebum, powders that absorb sebum, such as spherical organic powders, are blended (Patent Document 3 and 4).

More specifically, for example, in Patent Document 4, the following components (A), (B), (C) and (H): (A) squalane has an oil absorption of 1.0 g/g or more and a water absorption of Spherical organic powder of 1.0 g / g or less 0.1 to 10% by mass, (B) film forming agent 0.1 to 10% by mass, (C) volatile oil 5 to 60% by mass, (H) water 5 A water-in-oil emulsified cosmetic containing ~70% by mass is disclosed.

Japanese Patent No. 4566124 JP 2007-217393 A JP-A-2005-97246 WO2019/111831

On the other hand, until now, oil-based cosmetics, especially low-viscosity water-in-oil cosmetics, in which silica, which is an inorganic powder, has been hydrophobized and blended as a powder that absorbs sebum. was not sufficiently considered.

In contrast, the present inventors focused on liquid oily cosmetics using hydrophobically treated silica powder.

However, the present inventors' intensive research has revealed that the use of hydrophobically treated silica powder causes a problem of poor dispersibility.

In particular, as described above, the hydrophobically treated silica powder dispersed in the oil phase tends to sediment easily in the liquid oily cosmetic composition adjusted to have a low viscosity. If the hydrophobized silica powder precipitates, it must be shaken to redisperse the hydrophobized silica powder. However, it has been found that the use of hydrophobically treated silica powder is also poor in dispersibility when re-dispersed by shaking (in the present application, this is defined as "re-dispersibility").

An object of the present invention is to provide a liquid oily cosmetic in which the redispersibility of hydrophobically treated silica powder is excellent.

The present invention for achieving the above object is as follows.

式（Ｉ）中、Ｒ_１は炭素原子数１～１２の直鎖又は分岐鎖のアルキル基、若しくはフェニル基を示し；Ｒ_２は炭素原子数２～１１のアルキレン基を示し；ｐは１０～１２０の数であり；ｑは１～１１の数である。
〈態様２〉
前記疎水処理シリカ粉末のオレイン酸の吸油量が、１．０ｍｌ／ｇ以上である、態様１に記載の化粧料。
〈態様３〉
前記揮発性シリコーン油が、直鎖ジメチコンである、態様１又は２に記載の化粧料。
〈態様４〉
（ｅ）紫外線散乱剤を更に含む、態様１～３のいずれか一項に記載の化粧料。
〈態様５〉
（ｆ）皮膜形成剤を更に含む、態様１～４のいずれか一項に記載の化粧料。
〈態様６〉
油中水型である、態様１～５のいずれか一項に記載の化粧料。
〈態様７〉
前記疎水処理シリカ粉末が、シリコーン処理されたシリカ粉末である、態様１～６のいずれか一項に記載の化粧料。
〈態様８〉
前記ポリグリセリン変性シリコーンが、ビスブチルジメチコンポリグリセリル－３である、態様１～７のいずれか一項に記載の化粧料。
〈態様９〉
使用時に振とうして再分散させる再分散型化粧料である、請求項１～８のいずれか一項に記載の化粧料。 <Aspect 1>
A liquid oily cosmetic containing the following components (a) to (c):
(a) 5.0 to 60% by mass of volatile silicone oil;
(b) Hydrophobized silica powder 0.1 to 10% by mass;
(c) 0.05 to 5.0% by mass of polyglycerin-modified silicone represented by the following formula (I):

In formula (I), R ₁ represents a linear or branched alkyl group having 1 to 12 carbon atoms or a phenyl group; R ₂ represents an alkylene group having 2 to 11 carbon atoms; is a number from 120; q is a number from 1 to 11.
<Aspect 2>
The cosmetic according to aspect 1, wherein the hydrophobically treated silica powder has an oleic acid absorption of 1.0 ml/g or more.
<Aspect 3>
The cosmetic according to aspect 1 or 2, wherein the volatile silicone oil is linear dimethicone.
<Aspect 4>
(e) The cosmetic according to any one of aspects 1 to 3, further comprising an ultraviolet scattering agent.
<Aspect 5>
(f) The cosmetic according to any one of aspects 1 to 4, further comprising a film-forming agent.
<Aspect 6>
The cosmetic according to any one of aspects 1 to 5, which is water-in-oil type.
<Aspect 7>
The cosmetic material according to any one of aspects 1 to 6, wherein the hydrophobically treated silica powder is silicone-treated silica powder.
<Aspect 8>
The cosmetic according to any one of aspects 1 to 7, wherein the polyglycerin-modified silicone is bisbutyl dimethicone polyglyceryl-3.
<Aspect 9>
The cosmetic according to any one of claims 1 to 8, which is a redispersible cosmetic that is redispersed by shaking at the time of use.

According to the present invention, it is possible to provide a liquid oily cosmetic in which the hydrophobically treated silica powder has good redispersibility.

式（Ｉ）中、Ｒ_１は炭素原子数１～１２の直鎖又は分岐鎖のアルキル基、若しくはフェニル基を示し；Ｒ_２は炭素原子数２～１１のアルキレン基を示し；ｐは１０～１２０の数であり；ｑは１～１１の数である。 《Liquid Oily Cosmetics》
The liquid oily cosmetic of the present invention (hereinafter also simply referred to as "the cosmetic of the present invention") contains the following components (a) to (c):
(a) 5.0 to 60% by mass of volatile silicone oil;
(b) Hydrophobized silica powder 0.1 to 10% by mass;
(c) 0.05 to 5.0% by mass of polyglycerin-modified silicone represented by the following formula (I):

In formula (I), R ₁ represents a linear or branched alkyl group having 1 to 12 carbon atoms or a phenyl group; R ₂ represents an alkylene group having 2 to 11 carbon atoms; is a number from 120; q is a number from 1 to 11.

As described above, when hydrophobically treated silica powder is used in oil-based cosmetics, particularly low-viscosity water-in-oil cosmetics, the problem of poor redispersibility has been found. This is because the hydrophobized silica powder is obtained by subjecting the surface of the hydrophilic silica powder to a hydrophobizing treatment, so that part of the surface of the powder is in a hydrophilic state, thereby aggregating in the oil phase. Possibly.

In order to solve this problem, the inventors of the present invention conducted extensive research and found that by blending the polyglycerin-modified silicone represented by the above formula (I), the hydrophobically treated silica powder has specific redispersibility. was found to be good. Although not limited to theory, it is believed that the affinity between the polyglycerin-modified silicone represented by the above formula (I) used as a dispersant and the hydrophobically treated silica powder in the volatile silicone oil is higher than that of the polyglycerin-modified silicone. The affinity between the glycerin-modified silicone and the volatile silicone oil is greater than that of the volatile silicone oil, so that the polyglycerin-modified silicone is maintained on the surface of the hydrophobically-treated silica powder even when re-dispersed by shaking. It is considered that the function of dispersing the silica powder in the volatile silicone oil can be exhibited.

In contrast, other common dispersants are considered to have insufficient affinity for hydrophobically treated silica powder or insufficient ability to disperse hydrophobically treated silica powder in silicone oil.

Incidentally, the polyglycerin-modified silicone represented by the formula (I) is conventionally known to be usable as a silicone-based surfactant for dispersing metal oxide particles such as titanium oxide. It was not suggested to use from the viewpoint of redispersion as in the invention. Further, as shown in Comparative Example 8 described later, when redispersing metal oxide particles such as silicone-treated titanium oxide, the polyglycerin-modified silicone represented by the above formula (I) is blended in the same manner as in the present invention. Also, it was found that the redispersibility could not be improved.

<(a) Volatile silicone oil>
The cosmetic of the present invention contains (a) a volatile silicone oil. By containing volatile silicone oil, stickiness can be suppressed, for example, and the effect of improving the uniformity when the make-up cosmetic is applied in layers after applying the cosmetic to the skin can be obtained. .

In the present invention, the term “volatile” means that the volatile content exceeds 5% when left at 105° C. under atmospheric pressure for 3 hours. From the viewpoint of further exerting the effect of the present invention, the volatile content, which is a guideline for volatility, is 10% or more, 20% or more, 40% or more, 50% or more, 60% or more, 80% or more, or 100%. Preferably. In addition, in the present disclosure, "non-volatile" intends to exhibit a volatile content of 5% or less when left at 105°C for 3 hours. Here, the volatile matter refers to the value of the weight change rate measured by the gravimetric method after placing a filter paper on a glass Petri dish and dropping about 0.2 g of a sample.

In the present invention, volatile silicone oils include, but are not limited to, dimethicone and the like. Moreover, the volatile silicone oil may be chain-like or cyclic. Furthermore, the chain-like volatile silicone oil may be either straight-chain or branched-chain, with straight-chain being particularly preferred.

In addition, the viscosity of the volatile silicone oil may be, for example, 0.7 cs to 3.0 cs.

Moreover, a commercial thing can be used as a volatile silicone oil. Examples of commercially available volatile silicone oils include Silicone KF-96A-2cs (dimethicone), Silicone KF-96A-1.5cs (dimethicone), and Silicone KF56 (diphenylsiloxyphenyl trimethicone) manufactured by Shin-Etsu Chemical Co., Ltd. can be used, but are not limited to these.

One or more volatile silicone oils may be used in the cosmetic of the present invention. The content of the volatile silicone oil in the cosmetic of the present invention is determined based on the total amount of the cosmetic from the viewpoint of improving spreadability, suppressing stickiness, or improving the uniformity of applying the cosmetic to the skin. , 5.0% by mass or more, 6.0% by mass or more, 7.0% by mass or more, 8.0% by mass or more, 9.0% by mass or more, 10% by mass or more, 11% by mass or more, 12% by mass or more , 13% by mass or more, 14% by mass or more, 15% by mass or more, 16% by mass or more, 17% by mass or more, 18% by mass or more, 19% by mass or more, 20% by mass or more, 21% by mass or more, 22% by mass or more , 23% by mass or more, 24% by mass or more, 25% by mass or more, 26% by mass or more, 27% by mass or more, 28% by mass or more, 29% by mass or more, or 30% by mass or more, and 60% by mass 50% by mass or less, 40% by mass or less, or 30% by mass or less.

<(b) Hydrophobized Silica Powder>
The cosmetic of the present invention contains (b) hydrophobically treated silica powder. Since the cosmetic of the present invention can absorb sebum by containing the hydrophobically treated silica powder, it is possible to prevent makeup deterioration due to sebum.

In the present invention, the hydrophobically treated silica powder refers to silica powder whose surface has been hydrophobically treated. Here, the hydrophobic treatment may be, for example, silicone treatment such as dimethicone or methicone. From the viewpoint of further exerting the effect of the present invention, the hydrophobically-treated silica powder is preferably silicone-treated silica powder.

In the present invention, the silica powder may be porous silica particles or silica particles having an uneven surface. From the viewpoint of improving the sebum absorption effect, porous silica particles are used. is preferred. Moreover, the shape of the silica particles is not particularly limited, and may be, for example, a spherical shape, a substantially spherical shape, or a spheroidal shape. The silica particles may also be collapsible silica particles, particularly silica particles that break under finger shear.

Moreover, the average particle size of the hydrophobically treated silica powder is not particularly limited, and may be, for example, 1 to 30 μm. In the present invention, the average particle size can be calculated as the projected area circle equivalent diameter of primary particles observed by SEM or TEM.

In the present invention, the oil absorption of the hydrophobically-treated silica powder is evaluated by the amount (ml) of oleic acid that the hydrophobically-treated silica powder can absorb per gram (i.e., "oil absorption of oleic acid (ml/g)"). . Oleic acid is a typical unsaturated free fatty acid in sebum. In the present invention, the oil absorption of oleic acid in the hydrophobically treated silica powder is 1.0 ml/g or more, 1.1 ml/g or more, 1.2 ml/g or more, 1.3 ml/g or more, 1.4 ml/g or more. , 1.5 ml/g or more, 1.6 ml/g or more, 1.7 ml/g or more, 1.8 ml/g or more, 1.9 ml/g or more, 2.0 ml/g or more, 2.1 ml/g or more, It may be 2.2 ml/g or more, or 2.3 ml/g or more, and may be 5.0 ml/g or less. The oil absorption of oleic acid of the hydrophobically treated silica powder is, for example, "JIS-K JIS K 5101-13-1 Japanese Industrial Standards Pigment test method-Part 13: Oil absorption-Section 1: Refined linseed oil method". can be obtained by referring to

As the hydrophobic-treated silica powder, commercially available ones may be used. Commercially available hydrophobically treated silica powders include, but are not limited to, SA-SA-705 (product name) manufactured by Miyoshi Kasei Co., Ltd.

One or more hydrophobically treated silica powders can be used in the cosmetic of the present invention. The content of the hydrophobically treated silica powder in the cosmetic of the present invention is 0.1% by mass or more, 0.5% by mass or more, and 1.0% by mass or more, based on the total amount of the cosmetic, from the viewpoint of improving the sebum absorption effect. % by mass or more, 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, 3.0% by mass or more, 3.5% by mass or more, 4.0% by mass or more, 4.5% by mass % or more, 5.0% by mass or more, 5.5% by mass or more, 6.0% by mass or more, 6.5% by mass or more, 7.0% by mass or more, 7.5% by mass or more, or 8.0% by mass % or more, and may be 10% by mass or less, 9.0% by mass or less, 8.0% by mass or less, 7.0% by mass or less, or 6.0% by mass or less.

式（Ｉ）中、Ｒ_１は炭素原子数１～１２の直鎖又は分岐鎖のアルキル基、若しくはフェニル基を示し；Ｒ_２は炭素原子数２～１１のアルキレン基を示し；ｐは１０～１２０の数であり；ｑは１～１１の数である。 <(c) Polyglycerin-modified silicone>
The cosmetic of the present invention contains (c) a polyglycerin-modified silicone. As described above, the cosmetic of the present invention can improve the redispersibility of the hydrophobically-treated silica powder by containing this polyglycerin-modified silicone. In addition, the polyglycerin-modified silicone is represented by the following formula (I).

In formula (I), R ₁ represents a linear or branched alkyl group having 1 to 12 carbon atoms or a phenyl group; R ₂ represents an alkylene group having 2 to 11 carbon atoms; is a number from 120; q is a number from 1 to 11.

The polyglycerin-modified silicone represented by the above formula (I) can be obtained, for example, by adding an isopropyl alcohol solution of chloroplatinic acid to a mixed solution of polyglycerin diallyl ether and one-end hydrogenated dimethylpolysiloxane, and heating and reacting the solution. After adding an aqueous solution of hydrochloric acid to hydrolyze by heating, adding an aqueous solution of sodium bicarbonate to neutralize, purify and evaporate to obtain the product. The polyglycerin-modified silicone according to the present invention is not limited to this production method.

Examples of the polyglycerin-modified silicone according to the present invention include, but are not limited to, bisbutyl dimethicone polyglyceryl-3, which is defined as a cosmetic label name.

As the polyglycerin-modified silicone represented by formula (I) above, commercially available products may be used.

One or more polyglycerin-modified silicones represented by the above formula (I) can be used in the cosmetic of the present invention. The content of the polyglycerin-modified silicone represented by the above formula (I) in the cosmetic of the present invention is 0.05% by mass with respect to the total amount of the cosmetic, from the viewpoint of improving the redispersibility of the hydrophobically treated silica powder. 0.1% by mass or more, 0.2% by mass or more, 0.3% by mass or more, 0.4% by mass or more, 0.5% by mass or more, 0.6% by mass or more, 0.7% by mass or more , 0.8% by mass or more, 0.9% by mass or more, 1.0% by mass or more, 1.2% by mass or more, 1.5% by mass or more, 1.8% by mass or more, 2.0% by mass or more, 2.2% by mass or more, 2.5% by mass or more, 2.8% by mass or more, 3.0% by mass or more, 3.2% by mass or more, or 3.5% by mass or more; It may be 0% by mass or less, 4.0% by mass or less, or 3.0% by mass or less.

<Other ingredients>
The cosmetic of the present invention contains the components (a) to (c) described above in total of 50% by mass or more, 60% by mass or more, 70% by mass or more, 80% by mass or more, based on the total amount of the cosmetic, Or it may contain 90% by mass or more. In addition, the cosmetic of the present invention may further contain other components in addition to the components (a) to (c) described above. Other components are exemplified below, but the cosmetics of the present invention are not limited thereto.

<(d) water>
The cosmetic of the present invention may contain (d) water. As the water, water that can be used in cosmetics, such as ion-exchanged water, may be used.

In the cosmetic of the present invention, when water is included, the content thereof is 5.0% by mass or more, 10% by mass or more, 12% by mass or more, 15% by mass or more, and 18% by mass with respect to the total amount of the cosmetic. % or more, 20% by mass or more, 22% by mass or more, 25% by mass or more, 28% by mass or more, 30% by mass or more, 32% by mass or more, 35% by mass or more, 38% by mass or more, 40% by mass or more, 42% by mass % or more, or 45 mass % or more, and may be 70 mass % or less, 60 mass % or less, or 50 mass % or less.

((e) UV scattering agent)
The cosmetic of the present invention may further contain an ultraviolet scattering agent. The ultraviolet scattering agent has an effect of scattering or shielding ultraviolet rays.

Examples of the ultraviolet scattering agent include, but are not limited to, titanium oxide, zinc oxide, cerium oxide, or a powder mixture thereof. Also, the titanium oxide and zinc oxide may be particulate titanium oxide and zinc oxide having a particle size of, for example, 10 to 50 nm. Furthermore, titanium oxide and zinc oxide may be surface treated. Examples of the surface treatment include, but are not limited to, fatty acid treatment and fatty acid ester treatment.

Moreover, a commercial thing can be used as an ultraviolet-ray scattering agent.

When the cosmetic of the present invention contains an ultraviolet scattering agent, the content thereof is, for example, 1.0% by mass or more, 2.0% by mass or more, 3.0% by mass or more, relative to the total amount of the cosmetic, 4.0% by mass or more, 5.0% by mass or more, or 6.0% by mass or more, and 25% by mass or less, 20% by mass or less, 15% by mass or less, or 10% by mass or less good.

((f) film-forming agent)
The cosmetic of the present invention may further contain a film-forming agent. The film-forming agent can exert a long-lasting effect.

Examples of film-forming agents include, but are not limited to, fluorine-modified silicone resins, trimethylsiloxysilicate, and arylsilicone resins. Also, the film-forming agent may be solid at 25° C., and if it is solid, it may be used by dissolving it in a solvent.

Moreover, a commercial thing can be used as a film-forming agent. Commercially available film-forming agents include, but are not limited to, fluorosilicone resin X66-C8636 (trifluoroalkyldimethyltrimethylsiloxysilicate/dimethicone) manufactured by Momentive Performance Materials Japan LLC. .

When the cosmetic of the present invention contains a film-forming agent, the content thereof is, for example, 0.1% by mass or more, 0.5% by mass or more, 1.0% by mass or more, relative to the total amount of the cosmetic. 1.5% by mass or more, 2.0% by mass or more, 2.5% by mass or more, or 3.0% by mass or more, and 10% by mass or less, 8% by mass or less, 6% by mass or less, or It may be 4% by mass or less. In addition, when the film-forming agent is dissolved in the solvent, the solid content thereof may be within the above range.

(Surfactant)
The polyglycerin-modified silicone represented by the above formula (I) is a type of silicone-based surfactant that functions as a dispersant, but the cosmetic of the present invention functions as other surfactants, such as emulsifiers. A surfactant may be further included, for example, a silicone surfactant or a nonionic surfactant such as a polyglycerol fatty acid ester.

Examples of silicone-based surfactants other than the polyglycerin-modified silicone represented by the above formula (I) include polyether-modified silicones having polyether chains located in their side chains (hereinafter also simply referred to as "polyether-modified silicones"). ), or polyglycerin-modified silicone, etc., but are not limited to these.

Specific examples of these surfactants include PEG-10 dimethicone, PEG-9 polydimethylsiloxyethyl dimethicone, and lauryl PEG-9 polydimethylsiloxyethyl dimethicone, which are defined by cosmetic label names. not limited to

Commercially available products of these surfactants include, but are not limited to, KF-6017, KF-6028, and KF-6038 manufactured by Shin-Etsu Chemical Co., Ltd.

(Non-volatile silicone oil)
The cosmetics of the present invention may further contain oils other than the volatile silicone oils described above, such as non-volatile silicone oils. Non-volatile silicone oils include, but are not limited to, silicone oils other than the above-mentioned volatile silicone oils, such as commercially available silicone KF-96A-6T (dimethicone).

Also, when non-volatile silicone oil is included, its content may be, for example, 1.0 to 10% by mass relative to the total amount of the cosmetic.

(Water-soluble component)
The cosmetics of the present invention may further contain water-soluble components such as lower alcohols. Examples of lower alcohols include, but are not limited to, ethanol, propanol, butanol, pentanol, and hexanol.

Also, when a water-soluble component is included, the content thereof may be, for example, 1.0 to 10% by mass with respect to the total amount of the cosmetic.

(Ultraviolet absorber)
The cosmetic of the present invention may further contain an ultraviolet absorber. UV absorbers include, for example, benzoic acid derivatives, salicylic acid derivatives, cinnamic acid derivatives, dibenzoylmethane derivatives, β,β-diphenylacrylate derivatives, benzophenone derivatives, benzylidene camphor derivatives, phenylbenzimidazole derivatives, triazine derivatives, phenylbenzo triazole derivatives, anthranyl derivatives, imidazoline derivatives, benzalmalonate derivatives, 4,4-diarylbutadiene derivatives, and the like, but are not limited thereto.

Further, when an ultraviolet absorber is included, its content may be, for example, 1.0 to 10% by mass with respect to the total amount of the cosmetic.

(colorant)
The cosmetic of the present invention may further contain a coloring agent. Examples of coloring agents include red pigments such as red iron oxide or iron titanate, yellow pigments such as yellow iron oxide or ocher, black pigments such as black iron oxide, purple pigments such as mango violet, chromium oxide, and the like. green pigments, blue pigments such as Prussian blue, and mixtures thereof, but are not limited to these.

Moreover, when a coloring agent is included, the content thereof may be, for example, 0.001 to 10% by mass with respect to the total amount of the cosmetic.

In addition to the above, the cosmetic of the present invention contains ingredients that can be used in ordinary cosmetics, such as preservatives, thickeners, pH adjusters, fragrances, moisturizers, and blood circulation promoters, as long as the effects of the present invention are not impaired. , cooling agents, antiperspirants, antiseptics, skin emollients, or the like.

<form>
The cosmetic of the present invention may be a redispersible cosmetic which is redispersed by shaking at the time of use.

Moreover, the cosmetic of the present invention may be of the water-in-oil type. Water-in-oil type cosmetics are preferable from the viewpoint of moisture retention and water resistance.

Here, the water-in-oil type cosmetic can be produced by a normal method. More specifically, the cosmetic of the present invention may be produced by the following procedure. That is, at a predetermined temperature of about 25 ° C., the powder phase (hydrophobic-treated silica powder, and optionally added UV scattering agent, colorant, etc.) are added and dispersed. Thereafter, water-phase components (water and optional water-soluble components) are added and stirred to obtain a water-in-oil type cosmetic.

In addition, the cosmetic of the present invention may be applied to cosmetics such as emulsion, makeup base, liquid foundation, or sunscreen. In addition, the cosmetic of the present invention can be used alone, or can be used in layers of powder cosmetics such as liquid foundation, powder foundation, and white powder.

<viscosity>
The viscosity of the cosmetic of the present invention may be, for example, 10000 mPa·s or less, or 8000 mPa·s or less from the viewpoint of improving spreadability and ease of application, and suppresses dripping during application. It may be 100 mPa·s or more from the viewpoint of In the present invention, the viscosity of the cosmetic is measured using, for example, a BL viscometer (VS-A type, manufactured by Shibaura System Co., Ltd., 30° C.) under the measurement conditions of 12 rpm and 1 minute with rotor No. 3. good.

EXAMPLES The present invention will be described in more detail below with reference to Examples, but the present invention is not limited to these. Hereinafter, unless otherwise specified, the contents are shown in % by mass.

Cosmetics of Examples and Comparative Examples shown in Tables 1 and 2 below were prepared by a conventional method, and the redispersibility of each of the obtained cosmetics was evaluated according to the following criteria. Those results are shown in Table 1.

(Evaluation of redispersibility)
The cosmetics of Examples and Comparative Examples were centrifuged using a centrifuge (himac CF702) manufactured by Hitachi, Ltd., and the state of each cosmetic was evaluated. Evaluation criteria are as follows:
A: No sedimentation of particles when shaken up and down 10 times;
B: Some of the particles have sedimented when shaken up and down 10 times;
C: When shaken up and down 10 times, most of the particles (more than half visually) have sedimented.

"Other common components" in Table 1 are shown in Table 2 below.

表１から明らかなように、実施例１～３の化粧料は、いずれも再分散性が良好であることが分かった。

As is clear from Table 1, all of the cosmetics of Examples 1 to 3 were found to have good redispersibility.

On the other hand, it was found that all of Comparative Examples 1 to 7, which did not contain "bisbutyl dimethicone polyglyceryl-3", had poor redispersibility. In addition, in Comparative Examples 2 to 7, it was found that redispersibility could not be improved by blending other active agents instead of "bisbutyl dimethicone polyglyceryl-3".

Further, in Comparative Example 8, when "bisbutyl dimethicone polyglyceryl-3" was used to disperse "silicone-treated titanium oxide" instead of the hydrophobically-treated silica powder of the present invention, it was found that redispersibility was poor.

(Measurement of oil absorption of oleic acid in hydrophobically treated silica powder)
For the hydrophobically-treated silica powder (silicone-treated silica) used in the examples, "JIS-K JIS K 5101-13-1 Japanese Industrial Standards Pigment test method-Part 13: Oil absorption-Section 1: Refined linseed The oil absorption of oleic acid was measured with reference to "Oil Method".

More specifically, 100 g of hydrophobically-treated silica powder was weighed, and olein was used instead of refined linseed oil to measure the oil absorption of the hydrophobically-treated silica powder.

As a result of measurement, it was found that the oil absorption of oleic acid in the hydrophobically treated silica powder used in Examples was 240 to 250 ml/100 g.

(Measurement of viscosity)
The cosmetics of Examples 1 to 3 were measured using a BL-type viscometer (model VS-A, manufactured by Shibaura System Co., Ltd., 30° C.) under the measurement conditions of 12 rpm and 1 minute with a rotor No. 3. As a result, the viscosities of the cosmetics of Examples 1 to 3 were all 2000 mPa·s.

<Prescription example>
Hereinafter, formulation examples of the cosmetic of the present invention will be given, but the present invention is not limited to these examples.

Prescription example Sunscreen Component Content (% by mass)
Water Residue Ethanol 6.0%
Volatile Dimethicone 22%
Non-volatile dimethicone 4.0%
Diphenylsiloxyphenyl trimethicone 3.0%
Trifluoroalkyldimethyltrimethylsiloxysilicate/dimethicone
2.6%
PEG-10 Dimethicone 0.9%
Bisbutyl dimethicone polyglyceryl-3 1.0%
Ethylhexyl methoxycinnamate 5.0%
Bisethylhexyloxyphenol methoxyphenyltriazine 0.5%
Fatty acid treated titanium oxide 1.0%
Fatty acid ester treated zinc oxide 6.0%
Siliconized silica 5.0%
Polyhydroxybutyric acid 0.1%
Poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid) 0.1%
Phenoxyethanol 0.5%
Total 100%

Claims (9)

A liquid oily cosmetic containing the following components (a) to (c):
(a) 5.0 to 60% by mass of volatile silicone oil;
(b) Hydrophobized silica powder 0.1 to 10% by mass;
(c) 0.05 to 5.0% by mass of polyglycerin-modified silicone represented by the following formula (I):

In formula (I), R ₁ represents a linear or branched alkyl group having 1 to 12 carbon atoms or a phenyl group; R ₂ represents an alkylene group having 2 to 11 carbon atoms; is a number from 120; q is a number from 1 to 11. 2. The cosmetic according to claim 1, wherein the hydrophobically treated silica powder has an oleic acid absorption of 1.0 ml/g or more. 3. Cosmetics according to claim 1 or 2, wherein said volatile silicone oil is linear dimethicone. (e) The cosmetic according to any one of claims 1 to 3, further comprising an ultraviolet scattering agent. 5. The cosmetic according to any one of claims 1 to 4, further comprising (f) a film-forming agent. The cosmetic according to any one of claims 1 to 5, which is water-in-oil type. The cosmetic material according to any one of claims 1 to 6, wherein the hydrophobically treated silica powder is silicone-treated silica powder. The cosmetic according to any one of claims 1 to 7, wherein the polyglycerin-modified silicone is bisbutyl dimethicone polyglyceryl-3. The cosmetic according to any one of claims 1 to 8, which is a redispersible cosmetic that is redispersed by shaking at the time of use.