KR20040067375A - Cosmetic compositions containing black rice extract - Google Patents

Abstract

PURPOSE: Provided is a cosmetic composition which exerts excellent skin moisturizing effect, and is used in making stimulation-free cosmetics. CONSTITUTION: The cosmetic composition comprises 0.1-20wt.% of a black rice extract, and 0.1-20wt.% of one or more moisturizing agents. The black rice extract is made through the steps of: powdering the dried black rice to make a powder with particles of 0.3mm or less, and adding water heated at 50-70 deg.C thereto by 8-12 times, followed by mixing them for 2-5 hours; standing it at 10-15 deg.C, and removing the precipitate thereof; stirring it at 60-80 deg.C for 2-4 hours; and adding amylolytic enzymes such as alpha amylase thereto, and mixing them for 20-40 minutes while removing the precipitate thereof, followed by taking the supernatant therefrom. The moisturizing agent comprises polyhydric alcohols, saccharides, and polysaccharides.

Description

Cosmetic composition containing black rice extract {COSMETIC COMPOSITIONS CONTAINING BLACK RICE EXTRACT}

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a cosmetic composition containing an extract obtained by boiling hydrolysis of black rice powder or further containing known moisturizing agents, having an excellent moisturizing sustaining effect and an excellent skin irritation-releasing effect.

[Private Technology]

The skin is located on the outermost part of the body and is a very important organ that protects the body from the outside or prevents water loss from the inside. As a result, the skin is originally intended to protect the skin or body by the keratinocyte layer, sebaceous membrane, and natural moisturizing factors. However, when a person lives in daily life, there are limitations in maintaining the original function of the skin by various environmental factors such as temperature change, drying, ultraviolet rays, and so on. In addition, as the body ages and ages, the skin becomes dry and elastic due to a decrease in various physiological functions of the body, leading to a state of wrinkles.

Therefore, the article used to help maintain the skin's original function is one of the cosmetic functions. Therefore, it is natural that the moisturizing effect should be excellent in order to function well as a cosmetic. Therefore, conventional cosmetics are using a lot of moisturizing agents such as polyhydric alcohols such as glycerin or propylene glycol and polysaccharides such as sugar or hyaluronic acid. In addition to moisturizers, oils and waxes derived from various plants and minerals are used to form a protective film on the skin, thereby preventing the evaporation of moisture.

However, the conventional method alone does not sustain a moisturizing effect is limited to keep the skin healthy. In addition, conventional moisturizers include the possibility of causing skin irritation by promoting penetration of preservatives, surfactants, fragrances, and the like, which are representative side effects causing substances indispensably used in cosmetics, into the skin.

Therefore, the present inventors have intensively researched to develop a moisturizing agent which has excellent skin moisturizing sustaining effect and minimizes skin irritation. As a result, the present inventors developed a cosmetic raw material extracted from black rice, which is a kind of grain, and used it in cosmetics. The present invention has been found to be excellent while reducing skin irritation significantly.

Hereinafter, the present invention will be described in detail. The present invention is formulated with 0.1-20% by weight of black rice extract in the conventional conventional cosmetic base to produce cosmetics with excellent moisturizing effect and less irritating to the skin and glycerin, sorbitol, and propylene, which are commonly used in cosmetics. Polyhydric alcohols such as glycol, butylene glycol, dipropylene glycol, betaine, glucose, trehalose, ziitol, erythritol, and other sugar components or polysaccharides such as sodium hyaluronate and glycosaminoglycan 0.1-20 or more The present invention relates to a cosmetic composition, characterized in that it is prepared by weight% mixing. In the case of black rice extract less than 0.1% by weight of the moisturizing lasting effect is insignificant, the use of more than 20% by weight has the disadvantage of slippery and the moisturizing lasting effect does not increase much.

Hereinafter, the black rice extract used in the present invention will be described in detail. Black rice contains relatively high amounts of natural pigments such as anthocyanins, tannins, and flavonoids, and is rich in proteins, minerals, and vitamins in addition to cellulose, which is very good for our body and skin. Therefore, until now, black rice has been known as a health steel product, and since it is a food that is widely used by the general public, it has been applied to many foods. In the Republic of Korea Patent Publication No. 10-2001-0037199, the functional health drink and its manufacturing method were invented Here is an example of using some black rice extract. However, there are few examples of applying black rice extract to cosmetics.

In order to solve the problems of the prior art, an object of the present invention is to provide a cosmetic composition with excellent skin moisturizing effect.

In addition, an object of the present invention is to provide a cosmetic composition for the skin without skin irritation suitable for sensitive skin.

Black rice is rich in a component called beta glucan, which is a kind of natural saccharides, and it is thought to give the skin an excellent moisturizing effect. In addition, beta glucan has excellent moisturizing effect and good affinity with ingredients that may cause skin irritation such as preservatives, surfactants, and fragrances, so it adsorbs them, thus delaying their penetration into the skin and making it relatively safe for skin. It is estimated to help. In addition, natural pigments and tannins or flavonoids contained in the black rice extract are known to have excellent functions to protect the skin from harmful ultraviolet rays and have an anti-inflammatory effect.

As a method for producing black rice extract used in the present invention, the black rice is first washed, dried, and then ground using a grinder to form a powder having a size of about 0.3 mm or less. It is stirred for 2-5 hours by adding about 8-12 times of water heated to about 50-70 ° C., then left at a low temperature of about 10-15 ° C. and filtering out the precipitate. It is heated to 60-80 ° C. with stirring for 2-4 hours, followed by adding starch degrading enzymes such as alpha amylase thereto, stirring for 20-40 minutes, removing the precipitate and taking only the supernatant.

Hereinafter, the present invention will be described in detail through Examples and Comparative Examples.

Comparative Example 1-3 and Example 1-2

Comparative Examples 1-3 and Example 1-2 were prepared according to the composition (unit: weight%) shown in Table 1. Here, Comparative Example 1 is a conventional liquid cosmetic lotion formulation, and Example 1-2 is the addition of black rice extract, respectively. In these production methods, each component was divided into an alcohol phase and an aqueous phase, and each mixture was prepared by a conventional solubilization method in which the mixture was dissolved at room temperature and then the alcohol phase was added to the aqueous phase and stirred.

Table 1

Comparative composition of 4-5 and Example 3

Comparative Example 3 and Example 3-4 were prepared using an emulsion formulation for cosmetics according to the composition (unit: weight%) shown in Table 2 below. The production method is prepared by heating and dissolving the water and oil phases to 75 ° C., stirring the oil phase slowly while adding the oil phase to the water phase, then cooling to room temperature, and adding and stirring the additive at a temperature of 40 ° C. or less.

[Table 2]

These are typical application examples for lotion and milk lotion, and can also be applied to conventional cosmetic formulations such as essences, creams, gels, packs or masks, foundations, and the effects are similar.

Skin irritation evaluation

In order to evaluate the degree of skin irritation of the Comparative Examples and Examples, a patch test was performed on 20 healthy adults and men. As a method of evaluation, a certain amount of the sample was added to the pin chamber, and the filter paper of appropriate size was used to prevent the loss of the sample. The sample was attached to the subject's skin for 24 hours, the pin chamber was removed, and the skin condition after 2 hours was examined. It evaluated by the method of phosphorus determination, and the result is shown in Table 3. At this time, the degree of irritation shows that the erythema appeared on the skin is not erythema at all (-), erythema is present (±), weak erythema (+), moderate erythema (++), strong erythema (+++) Based on the evaluation, 0, 1, 2, 3, and 4 points were evaluated, and calculated by dividing them by the number of subjects.

Table 3

As can be seen in Table 3, the examples showed lower skin irritation compared to Comparative Examples 1-3.

Moisturizing persistence evaluation

In order to evaluate the moisturizing power of Comparative Examples 1 to 2 and Examples 1 to 3, the skin moisture increase rate was evaluated using the skin moisture retention measuring device (Skicon-200) before and after application of the sample, and the results are shown in the table. 4 is shown.

Table 4

Usability Evaluation

For the purpose of evaluating the usability of the comparative examples and examples, 50 general consumer monitors composed of 20-50 year old women were surveyed for the satisfaction of usability through the double blind method, and the results are shown in Table 5.

Table 5

As shown in Table 5, the examples were evaluated to be excellent in moistness and overall satisfaction while being less sticky than the comparative examples.

As mentioned above, the cosmetic composition of the present invention can be used as a cosmetic having excellent skin moisturizing effect and low irritation.

Claims (4)

A cosmetic composition comprising 0.1-20% by weight of black rice extract in a cosmetic base, and using one or two or more 0.1-20% by weight of a moisturizer commonly used in cosmetics. The black rice extract according to claim 1, which is washed with black rice, dried, and then ground using a grinder to make a powder of about 0.3 mm or less, which is added by adding about 8-12 times of water heated to about 50-70 ° C. After stirring for -5 hours, it is allowed to stand at a low temperature of 10-15 ℃ and the precipitate is filtered off, heated to 60-80 ℃ with stirring for 2-4 hours, and added to this starch degrading enzyme such as alpha amylase And it is obtained by stirring for 20-40 minutes, removing the precipitate and taking only the supernatant. The moisturizer commonly used in cosmetics according to claim 1 is a polyhydric alcohol or betaine such as glycerin, sorbitol, propylene glycol, butylene glycol, dipropylene glycol, betaine, glucose, trehalose, ziitol, erythritol, sugar, or the like. A cosmetic composition comprising polysaccharides such as sodium hyaluronate and glycosaminoglycan. The cosmetic formulation of claim 1, wherein the cosmetic formulation is a cosmetic composition, characterized in that consisting of a conventional cosmetic formulation such as lotion, essence, milk lotion, cream, gel, pack or mask, foundation.