JPH06219936A - Skin cosmetic - Google Patents

Abstract

PURPOSE:To obtain a skin cosmetic having improving effect on chapped skin, excellent moisture retention and functional characteristics. CONSTITUTION:A skin cosmetic comprises an oligosaccharide and yeast and/or an yeast extract. The amount of the glycolipid added to the cosmetic is preferably 0.001-20.0wt.%, more preferably 0.01-10.0wt.% based on the total amount of the cosmetic. A live cell of yeast itself, dried and powdered yeast cell and yeast essence prepared by subjecting an yeast cell to solubilization, extraction, purification, etc., by autodigestion, extraction with hot water, acidolysis, decomposition with yeast under a proper condition may be cited as the yeast and the yeast extract. The amount of the yeast or the yeast extract is 0.0001-20wt.% based on the total of prescription components of the cosmetic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cosmetic having excellent skin roughening improving effect, moisturizing effect and sensory characteristics.

[0002]

BACKGROUND OF THE INVENTION Generally,
It is said that healthy skin is a state where the water content of the skin is kept at 10 to 15%. Then, due to deterioration of the normal keratin water regulation mechanism due to aging, seasonal fluctuations, etc., the skin becomes rough. Conventionally, moisturizers such as glycerin have been used to adjust the amount of keratin water content and prevent rough skin. However, when using these moisturizers,
There is a problem in that a sticky feeling is apt to occur on the sensory side, and when used in low humidity, moisture is taken into the moisturizer from the skin due to the lack of outside humidity, and the skin is dried. On the other hand, it is known that yeast and yeast extract have an effect of enhancing the rough skin improving function, and cosmetics containing this are widely used, but the effect by themselves alone is not sufficient. .

In view of such circumstances, as a result of intensive studies by the present inventors, a skin cosmetic containing an oligosaccharide and yeast and / or a yeast extract has a high function of improving rough skin, has no sticky feeling, and has a moisturizing effect. They have found that the effect and sensory characteristics are further excellent, and have completed the present invention.

That is, the object of the present invention is to improve the rough skin,
It is intended to provide a skin cosmetic having excellent moisturizing effect and organoleptic properties as a skin cosmetic.

[0005]

Means for Solving the Problems The present invention which achieves the above object is a skin cosmetic containing an oligosaccharide and yeast and / or yeast extract.

The structure of the present invention will be described in detail below. Examples of oligosaccharides used in the present invention include maltose, xylobiose, isomantose, lactose, sucrose,
Raffinose, maltotriose, xylotriose,
Maltotetraose, xylotetraose, maltopentaose, xylopentaose, maltohexaose,
Xylohexaose, maltoheptaose, xyloheptaose and the like can be mentioned as particularly preferable ones, but the present invention is not limited thereto. The oligosaccharides can be used alone or in combination of two or more.

The content of oligosaccharides in the cosmetic is preferably 0.001 to 20.0% by weight, more preferably 0.01 to 10.0% by weight, based on the total amount of the cosmetic. If it is less than 0.001% by weight, a sufficient moisturizing effect cannot be obtained, and if it exceeds 20.0% by weight, the elongation of the cosmetic composition becomes heavy, which is not preferable.

The yeasts and yeast extracts used in the present invention include live yeast cells themselves, yeast cells dried and powdered, and yeast cells autolyzed, hot water extracted, acid hydrolyzed, enzymatically decomposed, etc. Yeast extract and the like that have been solubilized, extracted and purified under appropriate conditions. Generally, brewer's yeast, baker's yeast and the like are Saccharomyces.
s) Genus and others, and when obtaining a yeast extract, it is carried out by a physical, chemical or biochemical method for destroying the cells. In the present invention, regardless of the bacterial species as a raw material, the origin, the extraction method, the purification method, the treatment method, and other manufacturing methods, they can be arbitrarily selected and used. Among them, commercially available yeast dry powder and yeast extract are easy to handle and are easily available and convenient. The yeasts and yeast extracts described above contain useful components such as proteins, lipids, inorganic salts, organic acids, vitamins, amino acids, sugars and nucleic acid-related substances.

The amount of yeast and yeast extract compounded is 0.0001 to 20% by weight, based on the total amount of the prescription components of the cosmetic. Even if the upper limit of each of these blending amounts is exceeded, an effect commensurate with the exceeding blending amount cannot be expected, and if the blending amount is less than the lower limit, the object of the present invention cannot be achieved.

In the skin cosmetic of the present invention, in addition to the above essential components, an anti-inflammatory agent, a blood circulation promoter, a cell activating agent, a whitening agent, a surfactant, a dye, a fragrance, an antiseptic, a pigment, an antioxidant, An ultraviolet absorber and the like can be appropriately blended within the range where the object of the present invention is achieved.

Cream as the dosage form of the cosmetic of the present invention,
Examples include emulsions, lotions, packs and the like. This cosmetic is
For example, in the case of an emulsion, it can be produced by an ordinary method in which an oil phase and an aqueous phase are heated and dissolved, and then emulsified and dispersed and cooled.

[0012]

EXAMPLES The present invention will be described in detail below based on examples and comparative examples. In addition,% shown in the examples is% by weight. The test method for the effect of improving rough skin, the test method for the effect of improving keratin (increasing the anti-peeling property of keratinocytes), the moisturizing test method, and the sensory test described in Examples are as follows.

(1) Test Method for Rough Skin Improving Effect The effect of continuous application for 4 weeks was examined on 20 middle-aged and elderly subjects having rough skin on the lower legs. About 1 g of the sample was applied to the left lower leg test site of the test subject twice a day, and the condition of the skin before and after the start of the test was evaluated according to the following criteria. The lower right leg was not coated with the sample and served as a control. [Criteria for dry skin] −: Normal ±: Minor dryness, no desquamation +: Dry, mild desquamation ++: Dry, moderate desquamation +++: Dry, remarkable desquamation Compare the test results before and after the test with the control site , If the dryness of the skin is improved by two or more stages (for example, + →-,
++ → ±) is defined as “valid”, a case of improvement by 1 level is defined as “slightly valid”, and a case of no change is defined as “invalid”. The test results are shown by the number of subjects who were “effective” and “somewhat effective”.

(2) Test method for keratin improving effect (increasing keratinocyte anti-peeling property) Scotch tape (Nichiban Mending Tape) is adhered to the test site before and after the start of the rough skin improving effect test described above. The state of the keratinocytes attached to the tape when peeled off was examined in detail by a scanning electron microscope, and the peelability of the skin stratum corneum cells was classified according to the following criteria, and the keratin improving effect was obtained. [Judgment Criteria for Effect of Keratin Improvement (Increase in Exfoliation of Corneal Cells)] Evaluation Point 1: No scale is recognized. Evaluation point 2: Small scale interspersed evaluation point 3: Small to medium scale remarkable Evaluation point 4: Large scale remarkable When the difference between the evaluation point of the test site after application for 4 weeks and that of the control site is 2 or more points Is "valid", 1 is "slightly valid", and 0 is "invalid". The test results are shown by the number of subjects who were “effective” and “somewhat effective”.

(3) Moisture retention test method I. B. Impedance meter manufactured by S company (IBS-3
54 type). The measurement was carried out in a thermostatic chamber at 20 ° C. by applying a fixed amount (20 g / 40 cm ² ) of the sample to the upper arm of an adult male and measuring the conductance (unit: micromho) 10 minutes later. It is generally said that the larger the conductance, the smaller the electric resistance of the skin and the better the moisturizing property of the skin surface.

(4) Sensory test method 20 testers who complain of rough skin, dry skin, etc.
After continuous application for three consecutive months (morning and evening), the characteristics of the sample were evaluated. The test results are “smooth skin”, “without stickiness,” for the test items of smoothness and stickiness.
I felt the moistness and moisture. "

Examples 1 to 5 and Comparative Examples 1 to 2 Oligosaccharides, yeast and yeast extract were mixed in the composition shown in Table 1 to prepare an emulsion based on the following preparation method.

Composition

[Table 1]

Preparation methods (A) and (B) are uniformly dissolved at 80 ° C.,
The mixture is prepared by injecting (A) into (B) while stirring (B) and emulsifying and dispersing, and then cooling (C) is added to the mixture (C) while stirring to cool it to a temperature of 30 ° C.

The above-mentioned various tests were carried out for each, and the results are shown in Table 3.

[0021]

[Table 2]

[0022]

[Table 3]

Characteristics The emulsions of Examples 1 to 5 of the present invention were found to have remarkable effects on various characteristics. On the other hand, the emulsions of Comparative Examples 1 and 2 were inferior in various properties as compared with the examples of the present invention.

Example 6 Whitening cream A whitening cream of the present invention having the composition shown in Table 4 was prepared by the following production method.

[0025]

[Table 4]

Preparation Method Each component of (A) was mixed and dissolved at 80 ° C. and each component of (B) at 50 ° C., and A) was added to (B) and mixed and stirred to prepare.

Properties The whitening cream of this Example 6 showed good results in all the above tests.

[0028]

EFFECTS OF THE INVENTION As described above, it is apparent that the present invention provides a skin cosmetic having an excellent effect of improving rough skin, a high moisturizing effect and an excellent sensory characteristic.

Claims (1)

[Claims] 1. A skin cosmetic comprising an oligosaccharide and yeast and / or yeast extract.