JPS61100509A - Gelatinous beautifying and whitening cosmetic - Google Patents

Abstract

PURPOSE:A gelatinous beautifying and whitening cosmetic obtained by dissolving and blending stably an ascorbic acid fatty acid ester by the use of a hydrophilic sucrose fatty acid ester, a polyhydric alcohol and fats and oils without using water. CONSTITUTION:A gelatinous beautifying and whitening cosmetic comprising an ascorbic acid fatty acid ester (showing beautifying and whitening effect and acting as gel constituent component; e.g., ascorbic acid monostearate, etc., preferably 1-10wt%), a hydrophilic sucrose fatty acid ester (e.g., monomer of sucrose and myristic acid, etc., preferably 1-5wt%), a polyhydric alcohol (e.g., propylene glycol, etc., preferably 10-80wt%), and fats and oils (e.g., olive oil, vaseline, etc., preferably 10-80wt%). Since the cosmetic is aqueous gel, its feeling in use has no greasiness and provides a good feeling, and the cosmetic can be mixed with toilet lotion, milky lotion, cream, etc., in any ratio, and used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a gel-like whitening cosmetic containing stably dissolved and blended ascorbic acid fatty acid ester.

[Prior art] Ascorbic acid fatty acid ester is often used in whitening cosmetics, but it is easily hydrolyzed in cosmetics containing water such as milky lotions and creams, causing concerns.
It is difficult to maintain a constant whitening effect for a long period of time due to the whitening effect, coloring, and denaturation.

Therefore, one possible method for stably dissolving and blending ascorbic acid fatty acid ester without using water and using it in cosmetics is to dissolve or solubilize it in cosmetic ingredients such as fats and oils, but ascorbic acid At present, the solubility of acid fatty acid esters in cosmetic ingredients such as fats and oils is low, and no suitable solubilizing agent has been found.

[Problems to be Solved by the Invention] When trying to use ascorbic acid fatty acid esters in whitening cosmetics, cosmetics containing water may suffer from various problems as described above due to their susceptibility to hydrolysis. When producing oily cosmetics that do not contain water, there is a problem that there is no suitable solubilizer.

The present invention was made in order to solve the problems that occur when ascorbic acid fatty acid esters as described above are used in whitening cosmetics.

[Means for Solving the Problems] As a result of extensive research in light of the above-mentioned circumstances, the present inventors have developed a gel cosmetic method for stably dissolving and blending ascorbic acid fatty acid esters without using water. He came up with the idea of producing cosmetics and came up with the invention of gel-like whitening cosmetics.

That is, the present invention relates to a gel-like whitening cosmetic characterized by containing an ascorbic acid fatty acid ester, a hydrophilic sucrose fatty acid ester, a polyhydric alcohol, and an oil or fat.

[Example 1] The ascorbic acid fatty acid ester used in the present invention is a component that exhibits a whitening effect and also functions as a constituent component of a gel, and includes ascorbic acid, lauric acid, myristic acid, palmitic acid, stearic acid, A monoester or diester obtained from higher fatty acids such as oleic acid and linoleic acid, such as one or a mixture of two or more of ascorbyl distearate, ascorbic acid distearate, ascorbic acid monopalmitate, ascorbyl dipalmitate, etc. do.

The hydrophilic sucrose fatty acid ester used in the present invention is one of monoesters, diesters, or triesters of sucrose and higher fatty acids having 12 to 22 carbon atoms, preferably myristic acid, valmitic acid, stearic acid, etc. 2
It is a mixture of more than one species and has an HLB of 10 or more.

The hydrophilic sucrose fatty acid ester is a component used as a constituent component of a gel, and when the 'HLB is less than 10, the affinity with polyhydric alcohol deteriorates, making it difficult to form a gel.

The polyhydric alcohol used in the present invention is an alcohol that is water-soluble and has 2 to 10 hydroxyl groups in the molecule, such as propylene glycol, 1,3-butylene glycol,
Glycerin, polyoxyethylene glycol, sorbitol, maltitol, etc. 1 I! Or a mixture of two or more.

The polyhydric alcohol is a component used as a constituent of the gel.

The oils and fats used in the present invention are oils and fats that are liquid to solid at room temperature and are commonly used in cosmetics, foods, etc., such as animal and vegetable oils such as olive oil, castor oil, lanolin, squalane, and beeswax, liquid paraffin, petrolatum, paraffin, etc. mineral oil, octyldodecanol, octyldodecyl oleate, octyldodecyl myristate, and other synthetic oils or a mixture of two or more thereof.

In the present invention, in order to obtain a gel-like product in which M' ascorbic acid fatty acid ester, which has an effective whitening effect, is stably dissolved and blended, ascorbic acid fatty acid ester,
It is necessary to use the proportions of hydrophilic sucrose fatty acid ester, polyhydric alcohol, and oil within a specific range.

That is, ascorbic acid fatty acid ester 0.1-20
% (weight %, the same applies hereinafter), preferably 1 to 10%, hydrophilic sucrose fatty acid ester 0.5 to 8%, preferably 1 to 10%
5%, polyhydric alcohol 5-90%, preferably 10-8
0%, and 5 to 90% of oil and fat, preferably 10 to 80%, to produce a gel-like whitening cosmetic. By using the above-mentioned components in the above-mentioned ratios, a transparent or translucent gel-like material with good stability and a semi-solid state without self-flowing properties can be obtained.

When the proportion of the ascorbic acid fatty acid ester in the gel whitening cosmetic is less than 0.1%, the effective whitening effect of the ascorbic acid fatty acid ester cannot be changed;
If it exceeds 0%, ascorbic acid fatty acid ester will precipitate as crystals, making it difficult to see through the transparent or translucent dissolved gel.

When the proportion of the hydrophilic sucrose fatty acid ester is less than 0.5%, only a fluid composition with low stability is obtained, and when it exceeds 8%, the composition loses its balance and separates during production.

If the proportion of the polyhydric alcohol is less than 5%, the dispersion of the simisaccharide fatty acid ester and ascorbic acid fatty acid ester during production will be insufficient, making it difficult to move through the gel-like material, and if it exceeds 90%, the stability will be low. Only fluid compositions can be obtained.

In addition, when the ratio of the oil and fat is less than 5%, the dissolving power of the simi sugar fatty acid ester and ascorbic acid fatty acid ester in the gel decreases, making it difficult to form a transparent or translucent gel. This causes oil and fat separation phenomenon.

In addition, for the purpose of homogeneity stabilization and viscosity adjustment, a nonionic surfactant may be added to the gel-like whitening cosmetic at a composition ratio of 20% or less.

The nonionic surfactant is a nonionic surfactant with an HLB of 3 to 18 that is liquid to solid at room temperature, and includes, for example, sorbitan higher fatty acid ester, polyoxyethylene sorbitan higher fatty acid ester, glycerin higher fatty acid ester, and polyester. It refers to one or a mixture of two or more of oxyethylene glycerin higher fatty acid ester, polyoxyethylene higher alcohol ether, polyoxyethylene higher fatty acid ester, etc., which exhibits a liquid state or a solid state at room temperature. More specifically, sorbitan monooleate, polyoxyethylene sorbitan monostearate,
It is one or a mixture of two or more of glyceryl monooleate, polyoxyethylene glyceryl monostearate, polyoxyethylene oleyl ether, polyoxyethylene monooleate, etc., and exhibits a liquid to solid state at room temperature.

In addition to these ingredients, the gel-like whitening cosmetic of the present invention may contain preservatives, antioxidants, and various other additives commonly used in cosmetics.

What is noteworthy about the present invention is that ascorbic acid fatty acid ester, which is poorly soluble in both polyhydric alcohols and fats and oils at room temperature, can be converted into a stable and strong gel-like product in which the ascorbic acid fatty acid ester is dissolved in a transparent or translucent state. This is due to the fact that within the above blending ratio range, ascorbic acid fatty acid ester acts as a mixed surfactant together with sucrose fatty acid ester and a nonionic surfactant added as necessary, and is a mixture of polyhydric alcohol and oil. Stable lamella ti
This is thought to be due to the appearance of the structure.

That is, in the present invention, ascorbic acid fatty acid ester seems to function not only as a component having a whitening effect but also as a component for obtaining a stable gel-like product.

Since the gel-like whitening cosmetic of the present invention is an aqueous gel with good water dispersibility, it does not feel sticky and gives a good feeling, and can be mixed into lotions, emulsions, creams, etc. in any proportion. It can also be used as

In the present invention, since ascorbic acid fatty acid ester is dissolved and blended with oil and fat, it has good permeability into the skin during use and exhibits an excellent whitening effect on the skin. Moreover, since the gel-like whitening cosmetic of the present invention does not contain water, the ascorbic acid fatty acid ester is extremely stable, and its whitening effect does not deteriorate over a long period of time.

Hereinafter, the gel whitening cosmetic of the present invention will be explained in detail based on Examples.

Examples 1 to 3 (time course test) Propylene glycol, glycerin, in the amounts shown in Table 1
After heating and mixing and dissolving ascorbic acid monostearate, sucrose fatty acid ester (0 ester S-160 manufactured by Daiichi Kogyo Seiyaku ■) and polyoxyethylene sorbitan monostearate (20 mol ethylene oxide adduct) at 70°C. The liquid paraffin shown in Table 1, which had been preheated to 10° C., was gradually added with stirring. After thorough mixing, the mixture was stirred and cooled to 30°C to obtain a transparent gel-like substance.

The obtained transparent gel was placed in a 50 d glass sample bottle and stored in a 40° C. constant temperature bath, and the appearance and ascorbic acid monostearate residual rate were measured. The results are shown in Table 1.

(Residual rate of ascorbic acid monostearate) Sample 0.
59 Add 50 ml of methanol/chloroform mixture (1:1) to (sample collection m), mix well, then centrifuge and filter. Filter the residue while washing it with a methanol/chloroform mixture, collect the filtrate, transfer it to a 100 d volumetric flask, add the methanol/chloroform mixture to make it 100 d, and use this as sample solution X. Separately, standard solution Y is prepared by dissolving about 10 mg of standard ascorbic acid monostearate (1 sample of standard ascorbic acid monostearate) in a methanol/chloroform mixture to make 100 d. Also, methanol/chloroform mixture (blank)
Let be 2. Add 10 d of acetate buffer and 6 d of indophenol solution to 5 d each of X, Y, and Z, mix for 30 seconds, and immediately extract with 20 d of xylene. Absorbance at 520 trm with xylene as symmetry: Ax, Ay 1A
z is measured, and the ascorbic acid monostearate content is calculated from the following formula.

Ascorbic acid monostearate content (%) = Standard ascorbic acid monostearate collection amount Ascorbic acid monostearate, which is the ratio (%) of the obtained ascorbic acid monostearate content to the initial ascorbic acid monostearate content Find the rate remaining rate (X).

Vinegar? The lll buffer is made by dissolving 250 g of sodium acetate trihydrate in 1N water, then adding 500 g of glacial acetic acid and stirring well. 2
01n9 was warmed and dissolved in 100 d of water and filtered.

Example 4 (Nutritional Cream) 10 parts of propylene glycol, 6 parts of sorbitol, 1 part of ascorbic acid dipalmitate, 2 parts of sucrose fatty acid ester (D-Ester S-110 manufactured by Daiichi Kogyo Seiyaku fII)
After heating and mixing and dissolving 1 part of sorbitan monooleate and 1 part of sorbitan monooleate, 7 parts of liquid paraffin was separately added to this melt.
0 parts, 10 parts of olive oil, 311ff of natural vitamin E
i. An appropriate amount of preservative dissolved by heating at 70°C was gradually added. After thorough mixing, the mixture was stirred and cooled, an appropriate amount of fragrance was added at 40°C, and further stirred and cooled to 30°C, resulting in a translucent gel-like cream.

Example 5 15 parts of 1.3-butylene glycol, 10 parts of glycerin, 2 parts of ascorbic acid monostearate, sucrose fatty acid ester (O ester S-160 manufactured by Daiichi Kogyo Seiyaku ■)
) and 3 parts of polyoxyethylene monooleate (adduct of 50 moles of ethylene oxide) were heated and mixed and dissolved at 70°C.
The mixture was heated and dissolved at ℃ and gradually added thereto. After thorough mixing, the mixture was stirred and cooled, and the fragrance 3a Eft was added at 40°C. When the mixture was further stirred and cooled to 30'G, a translucent gel-like cream was obtained.

[Effects of the Invention] The gel-like whitening cosmetic of the present invention is a gel in which ascorbic acid fatty acid ester is dissolved and mixed in a transparent to translucent state, and since it does not contain water, the ascorbic acid fatty acid ester is dissolved over time. Both the appearance and the ingredients of Kuku products are stable for a long period of time, regardless of whether they are separated or hydrolyzed, and the skin whitening effect is maintained for a long period of time.

Claims (1)

[Scope of Claims] 1. A gel-like whitening cosmetic characterized by containing an ascorbic acid fatty acid ester, a hydrophilic sucrose fatty acid ester, a polyhydric alcohol, and an oil or fat. 2. Ascorbic acid fatty acid ester is a monoester or diester obtained from ascorbic acid and higher fatty acid, and its proportion in the gel whitening cosmetic is 0.
．． The gel-like whitening cosmetic according to claim 1, which contains 1 to 20% by weight. 3 Hydrophilic sucrose fatty acid ester has 1 carbon number and sucrose
It is an ester with an HLB of 10 or more consisting of higher fatty acids of 2 to 22, and its proportion in the gel whitening cosmetic is 0.
．． The gel-like whitening cosmetic according to claim 1, which contains 5 to 8% by weight. 4 Polyhydric alcohol is water-soluble and has 2 to 1 hydroxyl group in the molecule.
The gel-like whitening cosmetic according to claim 1, wherein the gel-like whitening cosmetic has 0 and the proportion thereof is 5 to 90% by weight. 5. The gel-like skin whitening according to claim 1, wherein the fat or oil is an animal or vegetable oil, mineral oil, or synthetic oil that is liquid to solid at room temperature, and its proportion in the gel-like skin whitening cosmetic is 5 to 90% by weight. Cosmetics. 6. The gel-like whitening cosmetic according to claim 1, which further contains a nonionic surfactant in addition to an ascorbic acid fatty acid ester, a hydrophilic sucrose fatty acid ester, a polyhydric alcohol, and an oil. 7. The gel whitening cosmetic according to claim 6, wherein the nonionic surfactant is a nonionic surfactant with an HLB of 3 to 18, and its proportion in the gel whitening cosmetic is 20% by weight or less. .