JPH05155734A - Additive for cosmetic - Google Patents

Abstract

PURPOSE:To obtain an additive for cosmetic capable of fully exhibiting the intrinsic functions of a water-soluble polymer such as emulsion-stabilizing action, thickening action and moisture-retention owing to its excellent compatibility with metallic salts and surfactants in various formulated cosmetic compositions. CONSTITUTION:The objective cosmetic additive is composed of water-soluble o-2,3-dihydroxypropylcellulose(DHPC). The cosmetic additive has emulsion stabilizing action, thickening action, moisture retention, suspension-stabilizing action and fluidity-improving action intrinsic to water-soluble polymers and, furthermore, has excellent compatibility with metallic salts and surfactants. Accordingly, it is extremely useful as a new cosmetic additive. The function can be exhibited by adding e.g. 0.2-10wt.% of the water-soluble DHPC to a cosmetic. Since an aqueous solution of the water-soluble DHPC can form a highly viscous material or a gel in the presence of a polyvalent metal ion such as borate, titanium salt or zirconium salt, these polyvalent metal ions may be added accordingly to the purpose.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cosmetic additive.

[0002]

2. Description of the Related Art Various water-soluble polymers are used in cosmetics by utilizing their functions such as emulsion stabilizing action, thickening action, moisturizing action, suspension stabilizing action and fluidity improving action. ..
Such water-soluble polymers include natural products such as pullulan, sodium alginate, starch, gelatin, tragacanth gum, carboxymethyl cellulose, methyl cellulose, hydroxyethyl cellulose (hereinafter referred to as HEC), hydroxypropyl cellulose (hereinafter referred to as HPC). Cellulose derivatives such as polyvinyl alcohol,
Synthetic polymers such as sodium polyacrylate and polyvinylpyrrolidone are known, but they are not sufficiently compatible with metal salts, surfactants, etc., which are often blended in cosmetics, so they cannot exert their functions sufficiently. Inconvenience has occurred.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to solve these disadvantages, and is intended for cosmetics having excellent compatibility with metal salts and surfactants in various cosmetic compounding compositions. The purpose is to provide an additive.

[0004]

Means for Solving the Problems As a result of intensive studies for achieving the above-mentioned problems, the present inventors have found that water-soluble o-2,3-dihydroxypropylcellulose (hereinafter abbreviated as DHPC) is a metal salt or a surface active agent. It was found that the compatibility with an agent is excellent and that a cosmetic containing the same exhibits an unprecedented quality, and the present invention has been completed.

The water-soluble DHPC used in the present invention can be easily synthesized by reacting cellulose with a dihydroxypropylating agent such as 3-chloro-1,2-propanediol or glycidol. An example is a heterogeneous reaction method in which cellulose is dispersed in a hydrophilic organic solvent such as acetone, dioxane, isopropyl alcohol, or pyridine, and then a dihydroxypropylating agent is added in the presence of an alkaline substance to react, or cellulose is dimethyl. A homogeneous reaction method may be mentioned in which the compound is dissolved in a non-aqueous cellulose solvent such as acetamide / lithium chloride, dimethyl sulfoxide / paraformaldehyde, etc., and then the dihydroxypropylating agent is added in the presence of an alkaline substance to carry out the reaction.

In this case, the cellulose in this case is wood pulp, linter pulp, regenerated cellulose, microcrystalline cellulose or the like, and the alkaline substance is sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, amines or the like, respectively. Can be used.

DHPC may be water-soluble, and the MS (the number of substitution moles per unit glucose ring) of its dihydroxypropyl group is 0.5 or more in the homogeneous reaction system, and in the heterogeneous reaction system.
1.5 or more is preferable. When each MS is less than that, the water-insoluble matter is increased or the water-insoluble matter is obtained.

This DHPC is also substituted with a substituent such as a hydroxypropyl group, a hydroxyethyl group, a methyl group, a carboxymethyl group, a sulfoethyl group, etc., in addition to the dihydroxypropyl group, as long as the object of the present invention is not impaired. Also included are derivatives of DHPC.

This water-soluble DHPC is used in cosmetics, for example 0.2
The function is exhibited by adding ~ 10% by weight. Examples of the target cosmetics include creams, emulsions, foundations, makeup, lotions, eye shadows, eyeliners, shampoos, rinses, lipsticks, lotions, packs, toothpastes and the like.

This water-soluble DHPC has the property of becoming highly viscous or gelled when polyvalent metal ions such as borate, titanium salt and zirconium salt are present in the aqueous solution thereof. It is also possible to add polyvalent metal ions.

The cosmetic additive of the present invention contains DHP.
In addition to C, if necessary, carboxymethyl cellulose,
Cellulose ethers such as HEC, HPC, methylcellulose, hydroxypropylmethylcellulose and sulfoethylcellulose, starch, xanthan gum, guar gum, gum arabic, wella gum, natural polysaccharides such as sodium alginate, polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone, sodium polyacrylate, etc. It is also possible to add a water-soluble polymer represented by the above synthetic polymer.

[0012]

EXAMPLES Specific embodiments of the present invention will be described below with reference to synthetic examples, test examples and examples, but the present invention is not limited to the description of the synthetic examples and examples.

Synthesis Example 1 2 parts by weight of microcrystalline cellulose (trade name: Avicel, manufactured by Asahi Kasei Kogyo Co., Ltd.) was dissolved in a solvent consisting of 9.8 parts by weight of lithium chloride and 80.2 parts by weight of dimethylacetamide, and then 2 parts by weight thereof. Sodium hydroxide powder and 9.1 parts by weight of glycidol were added, and the mixture was reacted under stirring at 50 ° C for 12 hours. Next, glacial acetic acid is added to the reaction solution to neutralize it, and acetone is added to this to precipitate a product, which is further washed with acetone and dehydrated and dried to obtain purified water-soluble DHPC.
2.4 parts by weight were obtained. When this DHPC was analyzed by ¹³ C-NMR, the number of moles of substitution of dihydroxypropyl groups per unit glucose ring was 0.70.

Synthesis Example 2 18.3 in place of 9.1 parts by weight of glycidol in Synthesis Example 1
Dihydroxypropylation reaction and post-treatment were carried out in the same manner except that parts by weight were used, and 3.6 parts by weight of purified water-soluble DHPC having a substitution mole number of 2.25 per unit glucose ring was obtained.

Synthesis Example 3 36.6 in place of 9.1 parts by weight of glycidol in Synthesis Example 1
Dihydroxypropylation reaction and post-treatment were carried out in the same manner except that parts by weight were used to obtain 5.2 parts by weight of purified water-soluble DHPC having a substitution mole number of dihydroxypropyl groups of 4.18 per glucose ring.

Synthesis Example 4 2 parts by weight of microcrystalline cellulose (described above) was added to lithium chloride.
After dissolving in a solvent consisting of 9.8 parts by weight and 80.2 parts by weight of dimethylacetamide, 2 parts by weight of powdered sodium hydroxide and 9.0 parts by weight of glycidol are added, and the mixture is added at 50 ° C.
The reaction was carried out for 12 hours. This operation was repeated 4 times, and a total of 36 parts by weight of glycidol was added, and the same post-treatment as in Synthesis Example 1 was carried out. As a result, purified water-soluble DHPC having a substitution number of dihydroxypropyl groups per unit glucose ring of 8.45.
8.7 parts by weight were obtained.

Synthetic Example 5 Dissolving pulp in powder form (trade name: E-7, manufactured by Backai) 1
After dispersing 15 parts by weight of acetone in 15 parts by weight, the concentration is 15.6%.
2.4 parts by weight of aqueous sodium hydroxide solution was added. Next, the temperature of the reaction system was raised to 50 ° C., 2.7 parts by weight of glycidol was added, and the reaction was carried out for 5 hours. After the reaction was completed, glacial acetic acid was added to neutralize, the reaction solution was filtered, and then the cake-like crude product was washed with a water / acetone / methanol (2/4/4 volume ratio) mixed solution and then dehydrated. , Dried, purified water-soluble DHPC with 2.23 substitution moles per unit glucose ring
1.8 parts by weight were obtained.

Synthesis Example 6 1 part by weight of regenerated cellulose (commercialized cellulose acetate saponified in an aqueous solution of sodium hydroxide) was dispersed in 8 parts by weight of acetone, and then 3.25 parts by weight of an aqueous solution of sodium hydroxide having a concentration of 7.6%. Then, the reaction system was heated to 50 ° C., 2 parts by weight of glycidol was added, and the reaction was carried out for 5 hours. After completion of the reaction, post-treatment was carried out in the same manner as in Synthesis Example 5 to obtain 1.4 parts by weight of purified water-soluble DHPC having a substitution mole number per unit glucose ring of 1.97.

Test Example 1 Carboxymethylcellulose sodium salt (the number of substitutions per unit glucose ring is 0.7, trade name: serogen PR, manufactured by Daiichi Kogyo Seiyaku Co., abbreviated as CMC in the table), HPC (trade name: Shin-Etsu HPC MF-P) , Manufactured by Shin-Etsu Chemical Co., Ltd.), tragacanth gum,
A 1% aqueous solution was prepared for each of polyethylene oxide and DHPC obtained in Synthesis Examples 1 to 6, and 15 g of each aqueous solution was used as a saturated aqueous solution of the inorganic salts shown in Table 1.
When g was added and the compatibility at that time was observed and evaluated according to the following criteria, the results shown in Table 1 were obtained. ◯: Good compatibility, no precipitation formed. X: Poor compatibility and precipitate formation.

Test Example 2 HEC (2.5 substitution moles per unit glucose ring, trade name: WP300H, manufactured by Daicel Chemical Industries), HPC (described above)
And 1% aqueous solution was prepared for each of the DHPCs obtained in Synthesis Examples 1 to 6, 10 g of each was mixed with 90 g of 30% aqueous solution of the surfactant shown in Table 2, and the compatibility at 10 ° C was as follows. When evaluated according to the above criteria, the results shown in Table 2 were obtained. ◯: Good compatibility, Δ: Turbidity occurs, ×: Liquid-liquid two-layer separation.

[0021]

[Table 1]

[0022]

[Table 2]

Example 1 Using DHPC obtained in Synthesis Example 5, a cleansing cream having the following composition was prepared. Liquid paraffin 30.0 parts by weight Vaseline 20.0 〃 Water 32.0 〃 Stearic acid monoglyceride 10.0 〃 Polyoxyethylene sorbitan monolaurate 3.0 〃 Glycerin 3.0 〃 DHPC 3.0 〃 Fragrances and preservatives Suitable amount This cleansing cream is stable and in use. It had good elongation, no sticky feeling, and a moist feel.

Example 2 Using the DHPC obtained in Synthesis Example 1, a lotion having the following composition was prepared. Ethanol 10.0 parts by weight Propylene glycol 5.0 〃 Sodium lauryl sulphate 1.5 〃 DHPC 1.0 〃 Water 82.5 〃 Perfume and preservative A proper amount This lotion had an excellent feeling of use and gave a moist feel.

Example 3 Using DHPC obtained in Synthesis Example 6, an emulsion having the following composition was prepared. Liquid paraffin 50.0 parts by weight Beeswax 10.0 〃 Water 35.0 parts by weight Ethyl alcohol 3.0 〃 DHPC 2.0 〃 Perfume and preservative A suitable amount This emulsion has excellent stability over time and gives a smooth and moist feel. It was a thing.

Example 4 Using DHPC obtained in Synthesis Example 4, a pack agent having the following composition was prepared. Polyvinyl alcohol 20.0 parts by weight Glycerin 4.0 〃 Ethyl alcohol 6.0 〃 DHPC 5.0 〃 Water 65.0 〃 Fragrance and preservative A proper amount This pack was excellent in stability over time and spreads well during use, giving an excellent feeling during use. ..

Example 5 Using the DHPC obtained in Synthesis Example 1, a shampoo was prepared with the following composition. Lauryl sulfate triethanolamine 10.0 parts by weight Fatty acid monoethanolamide 5.0 〃 DHPC 1.0 〃 Water 84.0 〃 Perfume and dye Appropriate amount This shampoo was excellent in stability over time and had good transparency.

Example 6 Using the DHPC obtained in Synthesis Example 2, a rinse having the following composition was prepared. Glyceryl monostearate 3.0 parts by weight Alkyldimethylbenzylammonium pride 4.0 〃 DHPC 1.0 〃 Water 92.0 〃 Fragrance and colorant Appropriate amount This rinse has excellent stability over time and gives a good gloss and moist feel to the hair.

Example 7 Using the DHPC obtained in Synthesis Example 3, a lipstick having the following composition was prepared. Beeswax 30.0 parts by weight Castor oil 45.0 〃 Lanolin 5.0 〃 Hardened oil 3.0 〃 Lake 7.0 〃 Liquid paraffin 5.0 〃 Pigment 2.0 〃 DHPC 3.0 〃 Fragrance and preservative Suitable amount This lipstick has excellent stability over time and spreads well during use. It had excellent moisturizing properties and gave a moist feel.

[0030]

The cosmetic additive of the present invention has only the emulsion stabilizing action, thickening action, moisturizing action, suspension stabilizing action, and fluidity improving action which the water-soluble polymer originally has. In addition, it has excellent compatibility with metal salts and surfactants, and is therefore extremely useful as a new cosmetic additive.

Claims (1)

[Claims] 1. A cosmetic additive comprising water-soluble o-2,3-dihydroxypropyl cellulose.