JP2813069B2 - Cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a cosmetic having a unique appearance in that it has a good moisturizing property, a moist feeling, a good whitening, eliminates rough skin, and develops a color as a liquid crystal in a human skin temperature range of 0.degree. About charges.

[0002]

2. Description of the Related Art Many patent applications have been filed for cosmetics containing liquid crystals, including the present inventors. JP-A-57-32211 discloses a cholesteric liquid crystal formulation. It is a blend of cholesteric liquid crystal compounds which contain at least two higher fatty acid esters of cholesterol suspended in an oily carrier or aqueous emulsion and which produce various colors when subjected to shearing action.

As cholesteric esters, there are many fatty acid esters of cholesterol.
Preferred esters include cholesteryl pelargonate, cholesteryl benzoate, cholesteryl cinnamate, cholesteryl adipate, and cholesteryl.
p-Nitrobenzoate, cholesteryl 3,4-dinitrobenzoate, cholesteryl 2-ethylhexanoate, and cholesteryl chloride are mentioned. The publication also discloses that, since cholesteric substances are usually cholesterol liquid crystals, these substances are easily absorbed by the skin and are preferred components for cosmetic formulations.

Japanese Patent Application Laid-Open No. 61-57838 discloses 12-
An esterified product of an intermolecular oligoesterified carboxylic acid of hydroxystearic acid and / or ricinoleic acid and a sterol, and a cosmetic comprising one or more of the above products.

[0005] This is related to 12-hydroxytearic acid, an ester of its intermolecular oligoesterified carboxylic acid with sterols, and cholesteryl 12-ester.
Not hydroxystearate. In addition, it shows excellent affinity and feel to the skin, and has several levels of emulsifying properties, water hydration and moisture retention compared to conventional sterol esters, and is considered to be suitable as an oil agent for cosmetics and external preparations. However, it does not utilize the coloring properties of the liquid crystal.

JP-A-62-53910 discloses a liquid crystal structure in a one-phase region obtained from a hydrophilic nonionic surfactant, a water-soluble substance having a hydroxyl group in a molecule, an oil component and water. Liquid crystal type oil-based cosmetics are disclosed. It is composed of a hydrophilic nonionic surfactant such as polyoxyethylene sorbitan fatty acid ester or an ethylene oxide derivative of glycerin fatty acid ester, a water-soluble substance having a hydroxyl group in a molecule such as glycerin or sorbitol, an oil component, and water. It has a liquid crystal structure in the region, and is not only related to cholesterol ester, but also used only to improve the feeling of use of cosmetics, and does not utilize the color developing properties of liquid crystals.

Japanese Patent Application Laid-Open No. 62-96585 also discloses HLB
A lamellar liquid crystal structure obtained from an ethylene oxide adduct of 10 or more Guerbet-type alcohols, a polyhydric alcohol having 3 or more valences, an oil component, and water. This also improves the feeling of use of cosmetics, and does not utilize the color developing properties of liquid crystals.

[0008] JP-A-63-230617 is a cosmetic containing one or more cholestanol derivatives and carboxymethyl chitin. The examples disclose cosmetics containing cholesteryl-12-hydroxystearate and cholesteryl oleate, which also have a smooth and rich feeling of use, and have a good skin feel and a soft touch. It is a cosmetic that has a long-lasting moisturizing effect, and does not use the coloring properties of liquid crystals.

The present applicant has previously disclosed in Japanese Patent Application Laid-Open No. 1-246209 an ester of cholesterol with two or more fatty acids selected from the group consisting of oleic acid, butyric acid, lauric acid, decanoic acid and nonanoic acid, especially cholesteryl 12 The present invention provides a liquid crystal-containing cosmetic in which a liquid crystal compound containing -hydroxystearate is dispersed in a transparent or translucent cosmetic.

In addition, the present applicant discloses in Japanese Patent Application Laid-Open No. 2-223506 a cosmetic prepared by dispersing a liquid crystal composition containing cholesteryl heptanoate and cholesteryl 12-hydroxystearate in a transparent or translucent cosmetic. Offered.

The liquid crystal composition further comprises at least one selected from the group consisting of cholesteryl heptanoate, cholesteryl oleate, cholesteryl butyrate, cholesteryl laurate, cholesteryl decanoate and cholesteryl nonanoate. The present invention provides a cosmetic in which an object is dispersed in a transparent or translucent cosmetic.

These liquid crystal compositions are usually kept in a transparent or translucent medium to maintain their appearance, but have a moisturizing glycerin having a hydroxyl group in the molecule, 1,3-butylene glycol, decaglycerin monostearate, propylene. In addition to compounds such as glycols, water, liquid paraffin, carboxyvinyl polymers, and the like, which have been used so far, are synthetic products and have no skin effect.

[0013]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid crystal which is easily absorbed by the skin while maintaining the superiority of the liquid crystal in that it develops color as a liquid crystal in the temperature range of human skin. It is an object of the present invention to provide a cosmetic composition which achieves a high degree of utilization, maintains perfect moisture retention, and has an effect such as whitening.

[0014]

Means for Solving the Problems One of the inventors of the present invention has previously proposed a cosmetic composition comprising a mixture of an extract of ai-tamago with a water-based liquid and glycerin in combination (Japanese Patent Application Laid-Open (kokai) No. H10-157556). Ganpei 2
-108924). In addition, a cosmetic has been proposed in which an extract of ai-tamago is extracted with water, ethanol, butanol, methanol, or a polyhydric alcohol alone or as a mixture of two or more thereof (Japanese Patent Application No. 2-108925).

The present inventors have found that the above-mentioned problems can be solved by using this extract of loved eggs as a medium for holding liquid crystals, and have completed the present invention. That is, the present invention relates to cholesteryl 12-hydroxystearate and at least one selected from the group consisting of cholesteryl oleate, cholesteryl butyrate, cholesteryl laurate, cholesteryl decanoate, cholesteryl nonanoate, cholesteryl linoleate and cholesteryl heptanoate. A cosmetic composition comprising a cholesteryl liquid crystal comprising the above ester and an egg extract. The cosmetic as described above, comprising glycerin.

The name of the egg is Ficus awkeotsang Makino
The dried fruit of a plant whose Japanese name is agaricaceae. The place of origin is mainly in southern Taiwan at an altitude of 10
It is a tree that grows naturally in the highland of 2000-2000m. In Taiwan, this fruit is put into water, sugar is added, and it is loved as a soft drink. Some are also used as folk remedies for hypertension. It is also known as food in Japan,
There is no precedent used for cosmetics.

[0017] If the extract of Ai egg with a liquid containing water as a main component or an extract of water, ethanol, butanol, methanol, or a polyhydric alcohol alone or as a mixture of two or more types is used as a cosmetic, the moisture retention is excellent. It was also found that when used in combination with glycerin, the moisturizing properties were significantly increased.

The moisturizing is divided into those based on oily raw materials such as liquid crystals and those based on aqueous raw materials such as glycerin and 1,3 butylene glycol. And their mechanisms of action are different, and cosmetics need both.

The present inventors have found that this extract of Ai egg has a synergistic effect as a viscous agent which has moisture retention and maintains dispersion of liquid crystals. The extract of Ai egg helps the function of the liquid crystal as a humectant for the aqueous raw material, and can enhance the moisturizing property without lowering the usability.

As the liquid crystal, two or more esters selected from the group consisting of cholesteryl oleate, cholesteryl butyrate, cholesteryl laurate, cholesteryl decanoate, and cholesteryl nonanoate,
A liquid crystal composition disclosed by the applicant in Japanese Patent Application Laid-Open No. 1-246209 such as a liquid crystal composition containing cholesteryl 12-hydroxystearate, a liquid crystal composition containing cholesteryl linoleate and cholesteryl 12-hydroxystearate,

A liquid crystal composition containing cholesteryl heptanoate and cholesteryl 12-hydroxystearate, or at least one selected from the group consisting of cholesteryl heptanoate, cholesteryl oleate, cholesteryl butyrate, cholesteryl laurate, cholesteryl decanoate and cholesteryl nonanoate. The applicant who mixed the seeds is disclosed in
The liquid crystal composition disclosed in JP-A-223506 can be suitably used because it develops a color as a liquid crystal in a temperature range of human skin.

Also, a liquid crystal composition of a cholesteric liquid crystal and an extract containing sterol obtained from shellfish meat, filed by the present applicant in Japanese Patent Application No. 232573/1990, can be suitably used.

[0023] For the love egg, since it is more effective to use a viscosity agent, the extraction is carried out by using a hydrophilic organic solvent such as ethanol, methanol, acetone or the like as the extract, when the water content is 80% by weight or more. Are preferred. As a cosmetic raw material, an extract using a mixed solvent in which ethanol is added to 80% by weight or more of water is optimal.

The characteristic of the Aitama extract is that it contains a whitening component as an active ingredient. If it is desired to completely extract the whitening component, it is extracted with water and then again with a hydrophilic organic solvent such as ethanol, methanol or acetone. It is better to extract.
Ethanol is preferred as a cosmetic raw material.

As an extraction method, a dried egg of the agaric plant is immersed in water to swell, and squeezed out with gauze or the like to elute the mucus into the water.
It is a matter of course that there is no problem in extracting mucus by other methods. If it is desired to completely extract the whitening component as described above, it is preferable to re-extract with an alcohol such as ethanol after extracting with water.

Although it is clear from research that the viscosity of this extract is generated by pectin, and it is known that pectin is insoluble in alcohol and other organic solvents, The present inventors have found that the same contains an amino acid and a component effective for whitening. The temperature at the time of extraction is sufficient at room temperature, and there is no particular need for heating. Depending on the degree of heating, the viscosity of the resulting product changes.

The amount of the aqueous extract of Ai Egg is 0.05 to 5.0% by weight, especially 0.1 to 0.1% by dry weight.
5.0% by dry weight is preferred. When glycerin is blended, the amount is 1 to 20% by weight, preferably 3 to 10% by weight.

If the water extract of love egg is less than 0.05% by weight, the viscosity is insufficient and the synergistic effect with the liquid crystal is insufficient, and if it exceeds 5.0% by weight, the effect is saturated and it is not economical. . If the amount of glycerin is less than 1% by weight, the effect of improving the moisturizing property is small, and if the amount is more than 20% by weight, the skin becomes hot and unpleasant when used.

[0029]

EXAMPLES The present invention will be described more specifically with reference to the following examples, but the present invention is not limited to these examples. (Example 1) Parts by weight A Cholesteryl 12-hydroxystearate 3.0 Cholesteryl heptanoate 3.0 Cholesteryl oleate 2.0 Cholesteryl butyrate 1.0 B Aitamako water extract (in terms of dry weight) 5.0 Purified water

(Example 2) Parts by weight A Cholesteryl 12-hydroxystearate 3.0 Cholesteryl oleate 2.0 Cholesteryl butyrate 1.0 Akoya oyster extracted sterols B Ai egg water extract (in terms of dry weight) 1.0 Glycerin 5.0 Carboxyvinyl polymer (neutralized) 1.0 Purified water

(Example 3) Glycerin of Example 2 was replaced with water.

(Comparative Example 1) A solution in which the extract of water of love egg of Example 1 was replaced with 1% by weight of a carboxyvinyl polymer (neutralized) and 4% by weight of water.

(Comparative Example 2) A water-extracted liquid of love egg in Example 2 was replaced with a carboxyvinyl polymer.

In the above examples and comparative examples, women 15
The face was divided into left and right sides and used for 3 months. The left and right combinations were randomly combined and performed 6 times for each sample. The sum is shown in Table 1.

[0035]

[Table 1]

[0036]

According to the present invention, a transparent or translucent synthetic product has conventionally been used as a medium of a liquid crystal composition which develops a color as a liquid crystal in a human skin temperature region. By using the liquid, the color development of the liquid crystal became clearer. In addition to the oily raw material of the liquid crystal, a moisturizing action by an aqueous raw material is required, but the love egg extract helps the function of the liquid crystal as a humectant for this aqueous raw material without lowering the usability. , Can enhance the moisturizing properties. The love egg extract also has a whitening effect on the skin, and is therefore an excellent liquid crystal medium having effectiveness.

Claims (2)

(57) [Claims] (1) Cholesteryl 12-hydroxysteale
And cholesteryl oleate, cholesteryl butyrate
Cholesteryl laurate, cholesteryl decanoe
Cholesteryl nonanoate, cholesteryl linoleate
Or cholesteryl heptanoate
Choles containing at least one ester
Cosmetic product containing Teryl liquid crystal and Ai egg extract. 2. The cosmetic according to claim 1, which comprises glycerin.