JP6640280B2 - Cosmetic gel and cosmetics containing the same - Google Patents

Description

  The present invention relates to cosmetic gels.

A gel is one in which colloidal fine particles or polymer solutes are dispersed and have a high viscosity due to a network of dispersoids, lose fluidity, and become a solid as a whole system. Also,
Among gels, a water dispersion medium is also called a hydrogel, and a hydrogel using a polysaccharide or a polymer (also called a hydrogel) is used for various purposes.
Locust bean gum is a water-soluble polysaccharide obtained from the endosperm part of the seeds of the leguminous carob tree. Locust bean gum dissolves in water when heated. The solution has a high viscosity and is used as a viscosity stabilizer and a water retention agent in foods and cosmetics.
Locust bean gum is known to form a strong gel when combined with xanthan gum, which does not gel by itself, but also does not gel by itself. However, when gels obtained from xanthan gum and locust bean gum contain ions such as sodium and calcium, it is known that the gels are not formed or the gel strength decreases over time. For this reason, it has been difficult to use it for cosmetics in which salts are blended.

JP-A-7-90246

An object of the present invention is to provide a hydrogel (gel) which is stable even when an electrolyte is blended.

The present inventors have found that when locust bean gum is used in combination with polyoxyethylene methyl glucoside as a humectant, a stable hydrogel is formed, and have made the present invention. This gel maintains a stable gel structure even if it contains salts and electrolytes blended in cosmetics.

The main configuration of the present invention is as follows.
(1) A gel cosmetic containing locust bean gum and polyoxyethylene methyl glucoside or polyoxypropylene methyl glucoside , wherein the gel cosmetic is filled with 50 ml in a glass jar container having a diameter of 4 cm and a height of 4 cm. Then, after standing for one day and night, when the container is tilted, the shape is almost maintained, or the gel-like cosmetic has a characteristic of being deformed but not showing fluidity (however, the carboxyvinyl polymer and / or Excluding those containing 0.4 to 3.0% by mass of an alkyl-modified carboxyvinyl polymer or those containing agar, xanthan gum and locust bean gum.)
(2) The gel cosmetic according to (1), wherein the locust bean gum and polyoxyethylene methyl glucoside or the locust bean gum and polyoxypropylene methyl glucoside are contained in a mass ratio of 1: 5 to 1:12 (provided that And those containing 0.4 to 3.0% by mass of a carboxyvinyl polymer and / or an alkyl-modified carboxyvinyl polymer in a cosmetic, or those containing agar, xanthan gum and locust bean gum).
(3) (1) or (2), wherein the locust bean gum in the gel cosmetic is 0.5 to 1.5% by mass, and the polyoxyethylene methyl glucoside or polyoxypropylene methyl glucoside is 5 to 15% by mass. Gel cosmetics as described (excluding those containing 0.4 to 3.0% by mass of carboxyvinyl polymer and / or alkyl-modified carboxyvinyl polymer in the cosmetic or those containing agar, xanthan gum and locust bean gum) .).
(4) The gel cosmetic according to any one of (1) to (3), wherein the gel cosmetic contains an electrolyte (provided that the carboxyvinyl polymer and / or the alkyl-modified carboxyvinyl polymer is contained in the cosmetic in an amount of 0.1 to 1%). Excluding those containing 4-3.0% by mass or those containing agar, xanthan gum and locust bean gum).
(5) the electrolyte is at least one selected from citric acid, sodium citrate, potassium hydroxide, ascorbic acid 2 glucoside, ascorbyl phosphate Mg, 3-O-ethylascorbic acid, L-glutathione and L-cysteine (4) ), Wherein the cosmetic contains 0.4 to 3.0% by mass of a carboxyvinyl polymer and / or an alkyl-modified carboxyvinyl polymer, or contains agar, xanthan gum, and locust bean gum except for.).

According to the present invention, a novel hydrogel (abbreviated as “gel” in the present invention) is provided.
The gel of the present invention has salt resistance. Further, when used as a cosmetic, it is possible to impart a favorable feeling of use having the moisture retention properties of locust bean gum and polyoxyethylene methyl glucoside or polyoxypropylene methyl glucoside. In addition, since it has salt resistance, it is possible to add salts and chelate components essential for cosmetics, and it is useful as a new cosmetic. It is also useful as a cosmetic gel containing a cosmetic component (electrolyte).

The present invention is a novel gel formed from locust bean gum, polyoxyethylene methyl glucoside or polyoxypropylene methyl glucoside, and a cosmetic using this gel.
Hereinafter, the components of the present invention will be described.

Essential Component (A) Locust Bean Gum The locust bean gum used in the present invention is a water-soluble polysaccharide obtained from the endosperm portion of the seeds of the carob tree of leguminous plants. It contains D-glucose and D-mannose as main components. As commercially available products, Neosoft L-16 (manufactured by Taiyo Kagaku Co., Ltd.), Maypro LBG (manufactured by Sansei Corporation), GENUGUM RL-200-J (manufactured by Sansei Corporation), and the like can be used. . GENUGUM RL-200-J consists of 70% by weight of locust bean gum and 30% of sucrose. The blending amount of locust bean gum is preferably 0.5 to 1.5% by mass, particularly preferably 0.8 to 1% by mass. If the amount is less than 0.5% by mass, a stable gel may not be formed. If it exceeds 1.5% by mass, the feeling of use may be deteriorated.

(B): Polyoxyethylene methyl glucoside or polyoxypropylene methyl glucoside Polyoxyethylene methyl glucoside is used as a cosmetic ingredient having an excellent moisturizing effect and an emollient effect. Although it has different characteristics depending on the chain length of polyoxyethylene (POE), those having a chain length such as POE10 and POE20 can be used in the present invention.
As a commercially available product of polyoxyethylene methyl glucoside, there is McBiobrite MG-10E.
(Nissan Co., Ltd., cosmetics label: Methyl gluces 10), McBiobrite MG-20
E (manufactured by NOF CORPORATION, cosmetic name; methyl gluces 20) can be used. The content of polyoxyethylene methyl glucoside is preferably 5 to 15% by mass, particularly preferably 5 to 1% by mass.
0% by mass. If the ratio is out of this range, a stable gel may not be easily formed.
The locust bean gum and the polyoxyethylene glucoside preferably have a mass ratio of 1: 5 to 1:12.
In addition, similarly, polyoxypropylene methyl glucoside can be used.
As a commercially available product of polyoxypropylene methyl glucoside, there is McBiobrite MG-1.
0P (manufactured by NOF CORPORATION, cosmetic name; PPG-10 methyl glucose), and McBioobright MG-20P (manufactured by NOF Corporation, cosmetic name; PPG-20 methyl glucose) can be used.

(C) Electrolyte Even if the gel of the present invention contains an electrolyte, it does not affect the stability of the gel. As the electrolyte, citric acid, sodium citrate, potassium hydroxide, ascorbic acid 2 glucoside,
Vitamin C derivatives such as ascorbyl phosphate Mg and 3-O-ethylascorbic acid;
-Glutathione, L-cysteine and the like are preferred. Among these, ascorbic acid 2 glucoside, ascorbyl phosphate Mg, vitamin C derivatives such as 3-O-ethylascorbic acid, L-glutathione, and L-cysteine deteriorate when heated, so that 30-40 ° C when preparing cosmetics. Mix in.

The gel of the present invention preferably has a hardness of 1 to 20 g when measured using a hardness meter.

(D) Optional Components In the gel of the present invention, components which are generally used according to the use of the cosmetic, such as a nonionic surfactant and an anion, as long as the effects of the present invention are not impaired as optional components. Surfactants, cationic surfactants, amphoteric surfactants, oils, humectants, antioxidants, ultraviolet absorbers,
Salts, pH adjusters, preservatives, antibacterial agents, chelating agents, coloring agents, fragrances and the like can be added. In addition, cosmetic ingredients such as ceramide and plant extract can be blended.

The gel of the present invention can be used for cosmetics such as a moisturizing gel and a whitening gel, cosmetics such as a moisturizing gel for hair, and quasi-drugs and pharmaceuticals as an external preparation for skin.

  Hereinafter, the features and effects of the present invention will be described in more detail with reference to Examples and Comparative Examples.

The gels of Examples 1 to 8 were prepared with the compositions shown in Table 1. On the other hand, a gel formed of conventional locust bean gum and xanthan gum was prepared with the composition shown in Table 2. For the preparation, each component was mixed, water was added, and the mixture was heated to 80 ° C. with stirring to prepare a solution, and the solution was left at room temperature overnight. In Examples 7 and 8 and Comparative Examples 2 to 4 to which an electrolyte was added, the electrolyte was added when the temperature of the solution was lowered to 30 ° C. Note that 1.3BG in the table is 1,3 butylene glycol.

Each of Examples 1 to 8 and Comparative Example 1 formed a translucent to transparent gel. Comparative Examples 2 to 4
The gel was broken immediately after preparation.

Observation of Gel State A glass jar having a diameter of 4 cm and a height of 4 cm was filled with 50 ml of each sample immediately after the respective components were mixed to form a gel, and the mixture was allowed to stand all day and night. The container was then tilted to observe how the gel morphology changed. In the case of a gel having no salt resistance, the gel becomes unstable, and the gel flows due to a change in gravity when the container is tilted. In addition, this test / evaluation is an index for maintaining a beautiful gel-like appearance when filled in a cosmetic container.
The state of the gel was determined according to the following criteria.
(Judgment criteria)
：: When the container was tilted, the gel shape was almost maintained.
Δ: When the container was tilted, the gel was deformed, but no fluidity was observed.
×: When the container is tilted, it has fluidity and flows down.
The results of observing the gel state are shown in Table 3 below.
In Comparative Examples 2 to 4, although the gel was broken immediately after preparation, the gel was filled and left standing overnight for observation.

As shown in Table 3, the gel of the present invention formed a stable gel without using xanthan gum in combination. In addition, the gel of the present invention was salt-resistant, and the gel formed of locust bean gum and xanthan gum was destabilized by the electrolyte, whereas the gel of the present invention was stable.

<Reference Example 1>
In order to confirm that 1,3 butylene glycol used in Examples and Comparative Examples was not involved in gelation, locust bean gum and an aqueous solution of 1,3 butylene glycol were allowed to stand overnight, and the state of the gel was determined. A test similar to the observation was performed. The test results are shown in Table 4 below.

As shown in Table 4, the solution of locust bean gum and 1,3 butylene glycol became a viscous solution but did not gel. Therefore, it became clear that the gels of Examples 1 to 8 were gels formed by the coexistence of locust bean gum and polyoxyethylene methyl glucoside.

<Reference Example 2>
It was confirmed whether a gel was formed by combining locust bean gum and a typical glycerin as a humectant. The aqueous solution of locust bean gum and glycerin was allowed to stand overnight, and the same test as the above-mentioned observation of the gel state was performed. The test results are shown in Table 5 below.

  As shown in Table 5, glycerin did not gel locust bean gum.

Claims (5)

A gel cosmetic containing locust bean gum and polyoxyethylene methyl glucoside or polyoxypropylene methyl glucoside , wherein the gel cosmetic is filled with 50 ml in a glass jar having a diameter of 4 cm and a height of 4 cm, After standing for a day and night, the gel-like cosmetic has a characteristic that it keeps almost its shape when the container is tilted or deforms but does not show fluidity (provided that the carboxyvinyl polymer and / or alkyl-modified in the cosmetic Excluding those containing 0.4 to 3.0% by mass of a carboxyvinyl polymer or those containing agar, xanthan gum and locust bean gum). The gel cosmetic according to claim 1, wherein the locust bean gum and polyoxyethylene methyl glucoside or the locust bean gum and polyoxypropylene methyl glucoside are contained in a mass ratio of 1: 5 to 1:12. Excluding those containing 0.4 to 3.0% by mass of a carboxyvinyl polymer and / or an alkyl-modified carboxyvinyl polymer or those containing agar, xanthan gum and locust bean gum).   The gel cosmetic according to claim 1 or 2, wherein the locust bean gum in the gel cosmetic is 0.5 to 1.5% by mass and the polyoxyethylene methyl glucoside or polyoxypropylene methyl glucoside is 5 to 15% by mass. (However, excluding those containing 0.4 to 3.0% by mass of a carboxyvinyl polymer and / or an alkyl-modified carboxyvinyl polymer in a cosmetic, or those containing agar, xanthan gum and locust bean gum).   The gel cosmetic according to any one of claims 1 to 3, wherein the gel cosmetic comprises an electrolyte (provided that the carboxyvinyl polymer and / or the alkyl-modified carboxyvinyl polymer is contained in the cosmetic at a concentration of 0.4 to 3.0). %, Or those containing agar, xanthan gum and locust bean gum). 5. The electrolyte according to claim 4, wherein the electrolyte is at least one selected from citric acid, sodium citrate, potassium hydroxide, ascorbic acid 2 glucoside, ascorbyl phosphate Mg, 3-O-ethylascorbic acid, L-glutathione and L-cysteine. (Excluding those containing 0.4 to 3.0% by mass of a carboxyvinyl polymer and / or an alkyl-modified carboxyvinyl polymer in the cosmetic or those containing agar, xanthan gum and locust bean gum). ).