JP2013256476A - Solubilized cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solubilized cosmetic, excellent in transparency and stably solubilizing an aqueous plant extract.SOLUTION: A solubilized cosmetic contains 0.5-5 mass% of a polyglycerol fatty acid ester; wherein the polyglycerol fatty acid ester is preferably a polyglyceryl diisostearate having an average glycerol polymerization degree of 3. The solubilized cosmetic such as a cosmetic material with excellent transparency for a treatment oil, a cleansing oil and the like which is capable of stably solubilizing an aqueous plant extract can be provided.

Description

  The present invention relates to a solubilized cosmetic.

  Solubilized cosmetics have two functions: a function as a solvent that dissolves a fragrance or an oily active ingredient, and an emollient function that forms a water dispersion prevention film on the skin. Furthermore, in addition to the emollient function of such a solubilized cosmetic, an attempt has been made to solubilize a water-soluble component such as a plant extract having such a function for the purpose of imparting a moisture function. In addition, it is known to use isostearoyl hydrolyzed collagen salt and diglyceryl oleate for solubilization (see, for example, Patent Document 1). However, isostearoyl hydrolyzed collagen salt is highly soluble in animal-derived extracts such as bovine blood extract and yeast extract, but is safer than water-soluble plant extract. The problem remains that the solubilizing effect is not high.

JP H03-68504 A

  It is an object of the present invention to provide a solubilized cosmetic material that is capable of stably solubilizing a water-soluble plant extract and having excellent transparency.

In view of such a situation, the present inventors have intensively studied, and as a result, by incorporating a polyglycerin fatty acid ester, a water-soluble plant extract can be stably solubilized and solubilized makeup with excellent transparency. The materials were found and the present invention was completed. That is, the solubilized cosmetic of the present invention is as follows.
(1) A solubilized cosmetic comprising a polyglycerol fatty acid ester.
(2) The solubilized cosmetic according to (1), wherein the polyglycerin fatty acid ester is polyglyceryl diisostearate.
(3) The solubilized cosmetic according to (1) or (2), wherein the polyglycerin fatty acid ester is contained in an amount of 0.5% by mass to 5% by mass with respect to the entire cosmetic.

ADVANTAGE OF THE INVENTION According to this invention, the solubilization-type cosmetics excellent in transparency which can solubilize a water-soluble plant extract stably can be provided.

<Polyglycerin fatty acid ester of the present invention>
The solubilized cosmetic of the present invention is characterized by containing a polyglycerol fatty acid ester as an essential component. Such components have the effect of solubilizing water-soluble plant extract and imparting high transparency. Preferred examples of the fatty acid residue of the polyglycerin fatty acid ester include those having a linear, branched or cyclic structure having 10 to 18 carbon atoms. Preferred examples of such fatty acid residues include lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid. Of these, isostearic acid is particularly preferred. As the polyglycerol, those having an average degree of polymerization of glycerol of 2 to 9 are preferable, and those of 3 to 5 are particularly preferable. Among the free hydroxyl groups of polyglycerin, those modified with the fatty acid residue are preferably less than half. Specifically, in the solubilized cosmetic of the present invention, polyglyceryl diisostearate having an average degree of polymerization of 3 can be preferably exemplified. As this component, a commercially available product can be used. As such a polyglycerin fatty acid ester, “Risolex PGIS32” manufactured by Higher Alcohol Industry Co., Ltd. is preferably exemplified. In the solubilized cosmetic of the present invention, the component is preferably contained in an amount of 0.5 to 5% by mass, more preferably 1 to 3% by mass, based on the entire cosmetic. Outside this range, the solubilization stability of the water-soluble plant extract is significantly reduced.

Examples of the solubilized cosmetic of the present invention include, but are not limited to, treatment oil cosmetics and oil cleansing cosmetics. As an advantage of the treatment oil cosmetic, there is an improvement in the heat retaining effect due to the effective component of the water-soluble substance. In addition, as an advantage of the oil cleansing cosmetic, in particular, an improvement in wash-off property (ease of rinsing) in which solubilized water is contained can be mentioned. In the solubilized cosmetic of the present invention, in addition to the essential components, optional components usually used in cosmetics can be contained within a range that does not impair the effects of the present invention.

Examples of such optional ingredients include macadamia nut oil, avocado oil, corn oil, olive oil, rapeseed oil, sesame oil, castor oil, safflower oil, cottonseed oil, jojoba oil, coconut oil, palm oil, liquid lanolin, and hardened coconut oil. Oil, wax, liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, petrolatum, oil, wax, liquid wax, liquid paraffin, squalane, bean wax, candelilla wax, carnauba wax, ibotarou, lanolin, reduced lanolin, hard lanolin, jojoba wax , Hydrocarbons such as microcrystalline wax, higher fatty acids such as oleic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, undecylenic acid, cetyl alcohol, stearyl alcohol, isostear Alcohol, behenyl alcohol, octyldodecanol, higher alcohol such as myristyl alcohol, cetostearyl alcohol, carbonic acid diester, cetyl isooctanoate, isopropyl myristate, hexyldecyl isostearate, diisopropyl adipate, di-2-ethylhexyl sebacate, lactic acid Cetyl, diisostearyl malate, ethylene glycol di-2-ethylhexanoate, neopentyl glycol dicaprate, glycerin di-2-heptylundecanoate, glycerin tri-2-ethylhexanoate, tri-2-ethylhexanoate tri Synthetic ester oils such as methylolpropane, trimethylolpropane triisostearate, pentane erythritol tetra-2-ethylhexanoate, dimethylpolysiloxane, Chain polysiloxane such as tilphenyl polysiloxane, diphenyl polysiloxane, cyclic polysiloxane such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexanesiloxane, amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified Oil agents such as silicone oil such as polysiloxane, modified polysiloxane such as fluorine-modified polysiloxane, fatty acid soap (sodium laurate, sodium palmitate, etc.), potassium lauryl sulfate, alkylsulfuric acid triethanolamine ether, etc. , Cationic surfactants such as stearyltrimethylammonium chloride, benzalkonium chloride, laurylamine oxide, imidazoline-based amphoteric surfactants (2-copolymers) Coil-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt, etc.), betaine surfactants (alkyl betaines, amide betaines, sulfobetaines, etc.), amphoteric surfactants such as acylmethyltaurine, sorbitan Fatty acid esters (such as sorbitan monostearate, sorbitan sesquioleate), glycerin fatty acids (such as glyceryl monostearate), propylene glycol fatty acid esters (such as propylene glycol monostearate), hydrogenated castor oil derivatives, glycerin alkyl ethers, POE sorbitan fatty acid esters (POE sorbitan monooleate, polyoxyethylene sorbitan monostearate, etc.), POE sorbite fatty acid esters (POE-sorbite monolaurate, etc.), PO Glycerin fatty acid esters (such as POE-glycerin monoisostearate), POE fatty acid esters (such as polyethylene glycol monooleate and POE distearate), POE alkyl ethers (such as POE2-octyldodecyl ether), POE alkylphenyl ethers (POE) Nonylphenyl ether, etc.), Pluronic types, POE / POP alkyl ethers (POE / POP2-decyltetradecyl ether, etc.), Tetronics, POE castor oil / hardened castor oil derivatives (POE castor oil, POE hardened castor oil, etc.) ), Nonionic surfactants such as sucrose fatty acid ester and alkyl glucoside, polyethylene glycol, glycerin, 1,3-butanediol, erythritol, sorbitol, xylitol, maltitol Polyhydric alcohols such as styrene, propylene glycol, dipropylene glycol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexylene glycol, 1,2-hexanediol, 1,2-octanediol, Preferred examples include fat-soluble vitamins such as α-tocopherol.

Hereinafter, the present invention will be described in more detail with reference to examples. However, it goes without saying that the present invention is not limited to these examples.

  Treatment oil cosmetics and Comparative Examples 1 to 5, which are solubilized cosmetics of the present invention, were prepared as Examples 1 to 3 in accordance with the formulations shown in Table 1 below. That is, a is weighed and dissolved by heating at 40 ° C. Weigh and dissolve uniformly at room temperature. While stirring at room temperature, ro was gradually added to i to obtain a treatment oil cosmetic.

<Test example>
A comparative test of stability and transparency was performed on the treatment oil cosmetic of the present invention and a comparative example. For the stability test, each cosmetic was left at 5, 20, and 40 ° C. for 1 month, and the presence or absence of separation / precipitation was visually observed. The case where there was neither separation nor precipitation was evaluated as ◯, the case where there was a small amount of separation, the case where there was precipitation, Δ, and the case where there was complete separation was evaluated as ×. For the transparency test, each cosmetic was left to stand at 40 ° C. for 3 days, and was then visually observed after being vibrated up and down 30 times. The results are shown in Table 2 below, and it can be seen that the treatment oil cosmetic which is the solubilized cosmetic of the present invention is superior in stability and transparency as compared with the comparative example.

  In accordance with the formulation shown in Table 3 below, as Example 4, an oil cleansing cosmetic that is a solubilized cosmetic of the present invention was prepared. That is, a is weighed and dissolved by heating at 40 ° C. Weigh and dissolve uniformly at room temperature. While stirring at room temperature, ro was gradually added to i to obtain an oil cleansing cosmetic. Furthermore, the results of the same evaluation as in the test example are shown in Table 4. It can be seen that the oil cleansing cosmetic which is the solubilized cosmetic of the present invention is excellent in stability and transparency.

Claims (3)

A solubilized cosmetic comprising a polyglycerol fatty acid ester. The solubilized cosmetic according to claim 1, wherein the polyglycerin fatty acid ester is polyglyceryl diisostearate. The solubilized cosmetic according to claim 1 or 2, wherein the polyglycerin fatty acid ester is contained in an amount of 0.5% by mass to 5% by mass with respect to the entire cosmetic.