JPH107521A - Emulsified cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stable emulsified cosmetic containing a specific polyglycerol fatty acid ester, a powdery material and an oil agent, good in touch, excellent in water resistance, and high in a UV light-protecting effect. SOLUTION: This emulsified cosmetic comprises the following components as active components: (A) at least 0.2wt.% of a polyglycerol fatty acid ester which is the ester of polyglycerol having an average polymerization degree of >=4 with a fatty acid, (B) 2-20wt.% of a powdery material, (C) 5-50wt.% of an oil agent, and (D) water. The emulsified cosmetic of O/W type emulsion is prepared by mixing and heating the components (A), (B) and (C), treating the mixture with a homogenizing mixer, heating and mixing the homogenized mixture with one or more of other oily phase components, adding the mixture to an aqueous phase component, and subsequently stirring the mixture. When an inorganic powdery material, especially, titanium dioxide particles, etc., is added as the powdery material, the employment of the polyglycerol fatty acid ester enables to homogeneously and stably disperse the powdery material without causing the aggregation of the powdery material. When a general surfactant is used, the dispersion of the inorganic powdery material is unstable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulsified cosmetic, and more particularly, it contains a specific polyglycerin fatty acid ester, powder, and an oil agent, and is stable, has a good touch, has excellent water resistance, and has an ultraviolet protection effect. A high O / W type emulsified cosmetic.

[0002]

2. Description of the Related Art Emulsified cosmetics containing powder have the characteristics of an ultraviolet absorber because they form a film in which the powder is dispersed on the skin surface when used by applying to the skin surface. Widely used from.

[0003]

However, hitherto, it has been difficult to obtain an emulsified cosmetic stably containing a sufficiently dispersed powder. That is, it was difficult to simultaneously obtain a good emulsification system and a powder dispersion system having good stability over time.

[0004] In particular, when an inorganic powder such as fine particle titanium oxide is compounded, it is unstable if a general surfactant is used.
It was difficult to obtain a good emulsification system and a powder dispersion system.
Further, it was difficult to obtain an O / W type emulsified cosmetic containing a powder having a good feel and excellent water resistance. Therefore, an emulsified cosmetic which stably contains a powder, has a good feel, and has excellent water resistance has been desired.

An object of the present invention is to provide a novel and novel emulsified cosmetic. Another object of the present invention is to provide an emulsified cosmetic which solves at least one of the above-mentioned problems of the prior art.

[0006]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in view of the above-described prior art, and as a result, the emulsified cosmetic containing powder has been found to have an emulsified state and a dispersed state of the powder. It is necessary to keep the stability, and it was found that the combination of powder, oil agent, and surfactant is important in order to simultaneously obtain an emulsified system and a powder dispersion system with good aging stability. The inventors have found that emulsified cosmetics containing powder stably can be obtained by combining fatty acid esters as surfactants, and have completed the present invention.

That is, according to the present invention, the following components (A) to
(D) Polyglycerin fatty acid ester which is an ester of (A) polyglycerin having an average degree of polymerization of 4 or more and a fatty acid, (B) powder, (C) oil agent, and (D) water. Can be achieved.

The emulsified cosmetic is preferably an O / W emulsion in which an oil phase is dispersed in an aqueous phase, and the oil phase contains an oil agent and powder (claim 2). . The polyglycerin fatty acid ester is preferably contained at least 0.2% by weight (claim 3).
The powder preferably contains 2 to 20% by weight (claim 4). The oil agent is preferably contained in an amount of 5 to 50% by weight (claim 5).

In the present invention, the description of the numerical range includes not only the extreme values but also any arbitrary intermediate values included therein. Hereinafter, “%” means “% by weight”.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(A) Polyglycerin fatty acid ester The polyglycerin fatty acid ester contained in the emulsified cosmetic of the present invention is an ester of a fatty acid with polyglycerin having an average degree of polymerization of 4 or more. Preferably, it has 8 to 22 carbon atoms.
A polyglycerol fatty acid ester having an average degree of esterification of 3 or more, an average degree of polymerization of glycerin of 6 or more, and an HLB value of 8 or less using fatty acids (including hydroxy fatty acids) of (including branched and unsaturated).

The polyglycerin fatty acid ester can be used alone or in combination with the emulsified cosmetic composition of the present invention. It is desirable that the emulsified cosmetic of the present invention be blended in an amount of 0.2% or more and 10% or less.

The polyglycerin fatty acid ester includes
For example, the following can be used.

Tetraglyceryl dilaurate, tetraglyceryl dimyristate, tetraglyceryl dipalmitate, tetraglyceryl distearate, tetraglyceryl dibehenate; tetraglyceryl trilaurate;
Tetraglyceryl trimyristate, tetraglyceryl tripalmitate, tetraglyceryl tristearate, tetraglyceryl tribehenate; tetraglyceryl tetralaurate, tetraglyceryl tetramyristate, tetraglyceryl tetrapalmitate, tetraglyceryl tetrastearate, tetrabehenate tetra Glyceryl.

Hexaglyceryl dilaurate, hexaglyceryl dimyristate, hexaglyceryl dipalmitate, hexaglyceryl distearate, hexaglyceryl dibehenate; hexaglyceryl trilaurate;
Hexaglyceryl trimyristate, Hexaglyceryl tripalmitate, Hexaglyceryl tristearate, Hexaglyceryl tribehenate; Hexaglyceryl tetralaurate, Hexaglyceryl tetramyristate, Hexaglyceryl tetrapalmitate, Hexaglyceryl tetrastearate, Hexatetrabehenate Glyceryl; hexaglyceryl pentalaurate, hexaglyceryl pentamyristate, hexaglyceryl pentapalmitate, hexaglyceryl pentastearate, hexaglyceryl pentabehenate.

Decaglyceryl trilaurate, decaglyceryl trimyristate, decaglyceryl tripalmitate, decaglyceryl tristearate, decaglyceryl tribehenate; decaglyceryl tetralaurate;
Decaglyceryl tetramyristate, decaglyceryl tetrapalmitate, decaglyceryl tetrastearate, decaglyceryl tetrabehenate; decaglyceryl pentalaurate, decaglyceryl pentamyristate, decaglyceryl pentapalmitate, decaglyceryl pentastearate, decapentayl pentabehenate Glyceryl; decaglyceryl heptalaurate, decaglyceryl heptamyristate, decaglyceryl heptapalmitate, decaglyceryl heptastearate, decaglyceryl heptabehenate; decaglyceryl octalaurate, decaglyceryl octamyristate, decaglyceryl octapalmitate, octa Decaglyceryl stearate, decaglyceryl octabehenate.

(B) Powder As the powder contained in the emulsified cosmetic of the present invention, at least one of various inorganic powders and organic powders generally used for cosmetics can be used. Preferred powders include extender pigments such as talc, mica, kaolin, and sericite; inorganic pigments such as titanium oxide, zinc oxide, iron oxide, fine titanium oxide, fine zinc oxide; titanium mica pearl pigment; Organic pigments such as No. 202, Red No. 202 and Yellow No. 401, and hydrophobically treated products of these pigments.

One type of powder may be used, but preferably at least two types are mixed with the emulsified cosmetic of the present invention. The emulsified cosmetic of the present invention is desirably blended at a ratio of 2 to 20%. The average particle size of the powder is preferably 0.01
５5.0 μm. In the emulsified cosmetic of the present invention, the powder is present in the oil phase, but a part of the powder may be present in the aqueous phase.

(C) Oil agent The oil agent contained in the emulsified cosmetic of the present invention has no affinity for water (having a hydrophobic property).
A general oil agent for cosmetics used for cosmetics can be used. The oil agent is not particularly limited, and examples thereof include the following.

Silicone oil Silicone oils such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, octamethylcyclopentasiloxane, decamethylcyclopentasiloxane and the like.

Vegetable oil Vegetable oil such as avocado oil, camellia oil, macadamia nut oil, olive oil, jojoba oil and the like. Fatty acids Fatty acids such as oleic acid and isostearic acid. Alcohols Alcohols such as hexadecyl alcohol and oleyl alcohol.

Esters Cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, 2-octyldodecyl myristate, neopentyl glycol di-2-ethylhexanoate, glycerol tri-2-ethylhexanoate, oleic acid 2
-Octyldodecyl, isopropyl myristate, glycerol triisostearate, glycerol tri-2-ethylhexanoate, 2-octyldodecyl oleate, isopropyl myristate, glycerol triisostearate, diglyceride 2-ethylhexanoate, di-paramethoxy Esters such as cinnamic acid-mono-2-ethylhexanoic acid and glyceryl dialkyl carbonate.

Liquid hydrocarbon oil Liquid hydrocarbon oil such as liquid paraffin, squalene, squalane, α-olefin oligomer and the like.

In particular, volatile dimethylpolysiloxane, dimethylcyclopolysiloxane and the like can be exemplified as preferable in reducing oiliness and stickiness.

These general oils for cosmetics can be used alone or in combination with the emulsion cosmetic of the present invention.
It is desirable that the emulsified cosmetic of the present invention be blended at a ratio of 5 to 50%.

(D) Water The emulsion cosmetic of the present invention may contain water in an optional amount. However, in order to obtain a good feeling of use, that is, an oily feeling, or a low stickiness and good spreadability, water alone or water may be used. It is preferable to add 30 to 80%, especially 40 to 70%, of the total with other water-soluble solvents.

Here, the other water-soluble solvent has an affinity for water, and includes, for example, lower alcohols or polyols such as ethanol, glycerin, sorbitol, propylene glycol and 1,3-butylene glycol. Can be.

In the present invention, other emulsifiers can be used, if necessary, as long as the effects of the present invention are not impaired.

Examples of such emulsifiers include glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, and polyoxyethylene hydrogenated castor oil. Examples include nonionic surfactants such as derivatives, alkyl glyceryl ethers, and polyoxyalkylene-modified polysiloxanes. In addition, anionic surfactants and cationic surfactants can also be used. These emulsifiers can be used alone or in combination of two or more.

The emulsified cosmetic of the present invention may further contain other components commonly used in cosmetics in an amount of 0 to 40% as long as the effects of the present invention are not impaired. Other components include humectants, solid fats, ultraviolet absorbers, alcohols, chelates, pH adjusters, preservatives, thickeners, pigments, fragrances, and the like.

The emulsion cosmetic of the present invention can be produced according to the following method.

The specific polyglycerin fatty acid ester, powder and oil are mixed, heated to 60 to 90 ° C., preferably 80 ° C., and homogenized (80 ° C., 5 minutes). The dispersion thus obtained was used as the oil phase component 1, heated and mixed with the other oil phase component 2, added to the aqueous phase component, and stirred to obtain the O / W emulsion emulsion emulsified cosmetic of the present invention. Can be manufactured.

[0032]

EXAMPLES The present invention will be further described with reference to examples, but the present invention is not limited thereto.

Example 1 An emulsified cosmetic having the composition shown in Table 1 was produced, and the appearance of the cosmetic and the particle size of the powder were evaluated. Table 1 shows the results.

[0034]

[Table 1]

Example 2 Sun Care Cream Oil Phase Component 1: Polyglycerin Condensed Ricinoleate 1.5 (%) Tri (caprylic / capric acid) glyceryl 10.0 Dimethylpolysiloxane (5 cS) 15.0 Fine Particle Oxidation Titanium 8.0 Oil phase component 2: Decaglyceryl pentastearate 1.3 Cetanol 2.0 Octyl methoxycinnamate 5.0 Oxybenzone 2.0 Water phase component: Decaglyceryl pentaoleate 3.0 1,3-butylene Glycol 5.0 Xanthan gum 0.3 Purified water Balance Preservatives Appropriate amount Perfume Appropriate amount Total 100.0

The oil phase component 1 is stirred by a homomixer (8000 rpm, 5 minutes) while heating and mixing at 80 ° C. The oil phase component 2 and the water phase component are also heated and dissolved at 80 ° C. The oil phase components 1 and 2 are mixed, and the mixed oil phase components are added to the aqueous phase component while stirring with a homomixer, and the mixture is stirred for 5 minutes while maintaining at 80 ° C. Next, the mixture was cooled with ordinary stirring, a preservative and a fragrance were added at 50 ° C, and the mixture was cooled to 35 ° C to obtain a sunscreen cream (Product 5 of the present invention).

Example 3 Cream Foundation Oil Phase Component 1: Decaglyceryl pentaoleate 1.8 (%) Tri (caprylic / capric acid) glyceryl 8.0 Dimethylpolysiloxane (10 cS) 12.0 Isostearic acid Isocetyl 7.0 Fine particle titanium oxide 5.0 Sericite 2.0 Talc 3.0 Bengala 0.4 Iron oxide yellow 0.7 Iron oxide black 0.1 Oil phase component 2: Decaglyceryl pentastearate 1.3 Behenyl alcohol 2 0.0 methylphenylpolysiloxane 5.0 aqueous phase component: decaglyceryl monoisostearate 3.0 isoprene glycol 5.0 xanthan gum 0.2 methylcellulose 0.1 purified water balance preservative proper amount perfume proper amount total 100.0

In the same manner as in Example 2, a creamy foundation (product 6 of the present invention) was obtained.

Example 4 Base Cream Oil Phase Component 1: Decaglyceryl penta-12-hydroxystearate 0.5 (%) Glyceryl tri-2-ethylhexanoate 5.0 Dimethylpolysiloxane (5 cS) 3.0 Jojoba oil 2.0 Fine particle titanium oxide 2.0 Nylon powder 1.0 Oil phase component 2: Decaglyceryl pentastearate 0.9 Behenyl alcohol 2.0 Squalane 3.0 Decamethylcyclopentasiloxane 2.0 Water phase component: Mono Decaglyceryl myristate 2.0 1,3-butylene glycol 5.0 Xanthan gum 0.3 Purified water Balance Preservatives Appropriate perfume Appropriate amount Total 100.0

In the same manner as in Example 2, a base cream (product 7 of the present invention) was obtained.

As described above, the product 5 of the present invention produced in Examples 2 to 4
No. 7 to No. 7 were emulsified cosmetics having good stability, good feeling in use, and excellent water resistance.

[0042]

The emulsified cosmetic composition according to the present invention contains the specific polyglycerin fatty acid ester, powder, oil agent and water, and therefore has the following basic effects. The powder contains the powder uniformly dispersed without agglomeration and has excellent stability over time. Less irritating, good feel and excellent feeling. Since it can contain powder having excellent water resistance, it has excellent water resistance. As the powder, a powder having an ultraviolet protection effect such as fine particle titanium oxide can be blended, whereby a cosmetic having a favorable ultraviolet protection effect on the skin can be provided.

Since the emulsified cosmetics according to claims 2 to 5 have the above-mentioned specific constitutional requirements, the above-mentioned basic effects are more remarkable.

Claims (5)

[Claims] 1. The following components (A) to (D): (A) polyglycerin fatty acid ester which is an ester of fatty acid with polyglycerin having an average degree of polymerization of 4 or more; (B) powder; (C) oil agent; An emulsified cosmetic comprising: 2. The emulsified cosmetic according to claim 1, which is an O / W emulsion comprising an oil phase dispersed in an aqueous phase, wherein the oil phase contains an oil agent and powder. 3. The method according to claim 1, wherein said polyglycerin fatty acid ester is contained in an amount of at least 0.2% by weight.
Or the emulsified cosmetic according to 2. 4. The emulsified cosmetic according to claim 1, which contains 2 to 20% by weight of the powder. 5. The emulsified cosmetic according to claim 1, wherein the cosmetic contains 5 to 50% by weight of the oil agent.