JP2000212020A - Skin cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a skin cosmetic having excellent moisture retention and the touch by making the cosmetic include a mixed branched type fatty acid ester of an isotypic fatty acid, an antiisotypic fatty acid and cholesterol, a hydrogenated lecithin and a specific dialkyl ether. SOLUTION: This cosmetic comprises (A) a mixed branched type fatty acid ester of an isotypic fatty acid of formula I (n is 6-32), an antiisotypic fatty acid of formula II and cholesterol, (B) a hydrogenated lecithin (e.g. one derived from soybean or egg yolk) and (C) a dialkyl ether having 12-20 total carbon atoms in the molecule (e.g. dioctyl ether). The preferable mixed amounts of the components are 0.005-20 wt.% of the component A, 0.001-10 wt.% of the component B and 0.01-40 wt.% of the component C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cosmetic which is excellent in moisturizing property and feel.

[0002]

BACKGROUND OF THE INVENTION For cosmetics, moisturizing ability is the most basic performance. By increasing the amount of keratin moisture after application, it not only smoothes skin but also has an antiaging effect. It is expected to have a beautiful skin effect.

[0003] As a humectant for cosmetics, water-soluble substances such as polyhydric alcohols such as glycerin and sorbitol, amino acids, sugars, and hyaluronic acid have been used. However, the moisturizing ability of these moisturizers is not always high,
In order to obtain a sufficient moisturizing effect, it was necessary to mix at a high concentration. Therefore, in recent years, moisturizing oil agents such as ceramide and cholesterol ester have been used. Cholesteryl, a long-chain branched fatty acid, is one of moisturizing oil agents and has been found to have a high water release. However, the branched fatty acid cholesteryl is sticky and heavy and has a poor feeling of use, and it has been difficult to mix it at a high concentration.

[0004] The present inventors have found that the skin cosmetics described below solve such problems, and have completed the present invention.

[0005]

That is, the present invention provides a compound represented by the following general formula (1):

Embedded image And the general formula (2)

Embedded image A mixed-branched fatty acid ester of an anteiso fatty acid and cholesterol represented by the formula (where n is 6 to 32), hydrogenated lecithin and the total number of carbon atoms in the molecule is 1
A cosmetic comprising a dialkyl ether of 2 to 20.

[0006]

Embodiments of the present invention will be described below in detail.

The fatty acids constituting the mixed branched fatty acid cholesteryl used in the present invention are the iso-type fatty acids represented by the above-mentioned general formula (1) and the anteiso-type fatty acids represented by the above-mentioned general formula (2). For example, YOF of Nippon Seika Co., Ltd.
CO CLE-NH and the like can be mentioned, but it is not limited thereto. The blending amount of the mixed branched fatty acid cholesteryl of the present invention is preferably 0.005 to 20% by weight (hereinafter abbreviated as wt%) based on the total amount of the skin cosmetic of the present invention. Even if the amount exceeds the upper limit of each of these amounts, an effect commensurate with the exceeded amount cannot be expected, and the amount of the compound less than the lower limit often cannot achieve the object of the present invention.

[0008] The hydrogenated lecithin applied to the present invention is a known compound, and soybean, egg yolk and the like are applied as a source of lecithin. The amount of the hydrogenated lecithin is 0.001 to 10 w based on the total amount of the skin cosmetic of the present invention.
t% is preferred. Even if the amount exceeds the upper limit, the effect corresponding to the amount exceeding the upper limit cannot be expected, and the object of the present invention cannot be often achieved with the amount less than the lower limit.

The total number of carbon atoms in the molecule of the present invention is 12 to 20.
Is a known compound, and in the present invention, dioctyl ether (Cethiol OE manufactured by Henkel Japan Ltd.) is particularly preferable. The compounding amount is 0.01 to 40 wt% based on the total amount of the skin cosmetic of the present invention.
% Is preferred. Even if the amount exceeds the upper limit of each of these amounts, an effect commensurate with the exceeded amount cannot be expected, and the amount of the compound less than the lower limit often cannot achieve the object of the present invention.

As described above, the skin cosmetic of the present invention comprises a mixture of a specific mixed branched fatty acid cholesteryl, a hydrogenated lecithin and a dialkyl ether, wherein the branched fatty acid cholesteryl is stably contained in the preparation. In addition to the combination, the three act synergistically on the skin to prevent the skin from drying out, making the skin finer and more firm (skin effect) and excellent skin aging prevention It shows remarkable effects such as effects.

The cosmetics of the present invention include, in addition to the above-mentioned raw materials, tar pigments, coloring pigments such as iron oxide, preservatives such as paraben and phenoxyethanol, stearic acid, myristic acid, isostearic acid, palmito oleic acid, and oleic acid. Acid, fatty acid such as dichloroacetic acid, sodium cetyl sulfate,
Anionic surfactants such as N-stearoyl-L-glutamate, glycyrrhizinate, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester, polyoxyethylene polyhydric alcohol fatty acid ester, polyoxyethylene hydrogenated castor oil, Nonionic surfactants such as polyhydric alcohol fatty acid esters, polyglycerin fatty acid esters, modified silicones, sucrose esters, etc., cationic surfactants such as tetraalkylammonium salts, amphoteric surfactants such as betaine type, sulfobetaine type and sulfoamino acid type Agents, natural surfactants such as lecithin, lysophosphatidylcholine, ceramide and cerebroside, pigments such as titanium oxide and zinc oxide, antioxidants such as dibutylhydroxytoluene, glycerin, 1,3-butylene glycol, Polyhydric alcohols such as propylene glycol, propylene glycol, sorbitol, malbitol, diglycerin, and raffinose; chelating agents such as edetic acid; liquid paraffin, squalane, paraffin, petrolatum and other hydrocarbons, glyceryl triisostearate, and tri-2-ethylhexanoic acid Glyceryl, triglycerides such as branched fatty acid triglycerides, octyldodecyl myristate, isocetyl myristate, ester oils such as cetyl palmitate isostearate, higher alcohols such as cetanol, behenyl alcohol, stearyl alcohol, cholesterol, sterols such as phytosterols, macadamia nuts Sterol esters such as fatty acid phytosteryl, cholesteryl isostearate, beeswax, mokuro, Waxes such as jojoba oil, xanthan gum, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, thickeners such as pectin and carrageenan, neutralizing agents such as potassium hydroxide, diisopropanolamine, triethanolamine, hyaluronic acid, collagen, etc. Biopolymers, plant extracts such as chamomile, aloe, peach, carrot, hibiscus, oak, ogon, licorice, amino acids such as serine, threonine, sarcosine, γ-aminobutyric acid, hydroxy-γ-aminobutyric acid, vitamin C, A , E and B, and various vitamins and derivatives thereof, and an ultraviolet absorber such as hydroxymethoxybenzophenone sulfonate can be appropriately compounded within a range that achieves the object of the present invention.

Examples of the dosage form of the cosmetic of the present invention include creams, emulsions, lotions, packs, massages, and makeups. For example, in the case of an emulsion or the like, this cosmetic can be produced by a usual method of emulsifying and dispersing an oil phase and an aqueous phase, each of which is heated and dissolved, and cooling.

[0013]

The present invention will be described below in detail based on examples and comparative examples. The compounding amount is% by weight. In addition, the moisturizing test (method of measuring the water content of the stratum corneum) and the sensory test described in the examples are as follows.

Moisturizing test (method for measuring moisture content of stratum corneum) In 20 upper arms, the moisture content of the stratum corneum before and 15 minutes after the application of the sample was measured by Skicon-200 (IB
(Manufactured by S. Co., Ltd.), and evaluated by the number of persons whose numerical values increased.

Sensory test The sample was applied to the face of 20 female subjects (35 to 55 years old), and the evaluation was performed by the number of persons corresponding to each item.

Examples 1 to 3 and Comparative Examples 1 to 3 [Cream] Creams were prepared by blending as shown in Table 1, and the above-mentioned experiments were carried out. The mixed branched fatty acid cholesteryl of the present invention is manufactured by Nippon Seika (YOFCO C).
LE-NH). Hereinafter, this is abbreviated as NH.

(1) Preparation method After the components (A) and (B) are uniformly dissolved at 80 ° C., the components (A) and (B) are mixed, stirred and dispersed, and then filled into a container.

(2) Characteristics Table 1 shows the results of various tests performed on each cream.
As shown in Table 1, the creams containing no dialkyl ether, no NH, or no hydrogenated lecithin of Comparative Examples 1 to 3 did not provide sufficient effects, and the dialkyl ethers of Examples 1 to 3 of the present invention were not obtained. , NH and hydrogenated lecithin had a remarkable effect on various properties.

[0019]

[Table 1]

Examples 4 to 6 [Sunscreen] In the same manner as in Example 1, each sunscreen was prepared with the following composition and various tests were carried out.

(1) Preparation Method All components were mixed at 80 ° C., dissolved by heating, and then cooled to 30 ° C. while stirring to prepare each lotion.

(2) Characteristics As shown in Table 2, the sunscreens of Examples 4 to 6
All of the above tests showed good results.

[0023]

[Table 2]

Examples 7 to 9 [Emulsion] In the same manner as in Example 1, each emulsion was prepared with the following composition and various tests were carried out.

(1) Preparation method After the components (A) and (B) are uniformly dissolved, the components (A) and (B) are mixed, stirred and dispersed, and then filled in a container.

(2) Characteristics As shown in Table 3, Examples 7 to 9 all showed good results in the above tests.

[0027]

[Table 3]

[0028]

As described above, the present invention provides a moisturizing agent,
It is clear to provide a skin cosmetic with an excellent feel.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C083 AA032 AA082 AA112 AB032 AB212 AB242 AC012 AC022 AC072 AC102 AC122 AC132 AC171 AC172 AC261 AC262 AC352 AC422 AC442 AC472 AC482 AC532 AC542 AC582 AC642 AC662 AC782 AD092 AD152 AD172 AD212 AD352 AD412 AD5721 AD642 AD662 CC01 CC02 CC05 CC19 DD31

Claims (1)

[Claims] 1. A compound of the general formula (1) And an iso-type fatty acid represented by the general formula (2): A mixed-branched fatty acid ester of an anteiso fatty acid and cholesterol represented by the formula (where n is 6 to 32), hydrogenated lecithin and the total number of carbon atoms in the molecule is 1
A cosmetic, comprising 2 to 20 dialkyl ethers.