JPH07545B2 - Cream-like skin cleanser - Google Patents

Description

TECHNICAL FIELD The present invention relates to a creamy skin cleansing agent having good stability, and more specifically, a creamy skin having little change in viscosity due to temperature change and good usability. It relates to a cleaning agent.

[Prior Art] Conventionally, skin cleansing agents are classified into shape, solid, creamy, and liquid. Among them, creamy ones are particularly preferable in terms of usability. It is used. The creamy skin cleanser has features that an appropriate amount can be easily taken out, can be easily dissolved in water, can be easily foamed, and the appearance and the like are elegant.

However, in general, the creamy skin cleansing agent has a drawback that the viscosity changes greatly due to temperature changes. For example, even if it is a good cream at normal temperature, it has the drawback that it becomes hard at low temperature and flows out at high temperature.

In order to eliminate these drawbacks, a method of incorporating various gelling agents has been attempted (for example, JP-A-53-41309).
However, no satisfactory results have been obtained.

[Problems to be Solved by the Invention] When a water-soluble polymer thickener is added as a gelling agent, a slimy feel peculiar to the water-soluble polymer may be generated during use and after use. Sometimes it had the drawback of being spinnable. Further, the gelling agent of montmorillonite clay-based inorganic powder has a drawback that it cannot be used in an acidic region.

Conventionally, no gelling agent having good usability has been found in cream-like skin cleansing agents regardless of pH, and its development has been awaited.

[Means for Solving the Problem] In view of the above points, the present inventors have earnestly studied to obtain a creamy skin cleansing agent having good stability, and as a result, silicic acid anhydride and a water-soluble polyalkylene glycol are specified in specific amounts. The present invention has been completed by finding that the above drawbacks can be solved by mixing in a specific ratio.

That is, the present invention comprises an ionic surfactant, silicic acid anhydride (a component), and a water-soluble polyalkylene glycol (b component), and the a component is 1 to 15 wt%, the a component The cream-like skin cleansing agent is characterized in that the ratio of the ingredient B and the ingredient B is 100: 1 to 1: 1 (weight ratio).

The structure of the present invention will be described below.

With regard to the ionic surfactant used in the present invention, either an anionic surfactant or an amphoteric surfactant may be used alone or in combination of two or more, and may be used in combination.

Examples of the anionic surfactant include fatty acid salt, alkylbenzene sulfonate, alkyl sulfonate, α-olefin sulfonate, dialkyl sulfosuccinate, α
-Sulfonated fatty acid salt, sodium N-methyl-N-
Oleoyl taurine, polyoxyethylene alkyl ether sulfate, polyoxyethyne alkylphenyl ether sulfate, alkyl phosphate, polyoxyethylene alkyl ether phosphate, polyoxyethylene alkylphenyl ether phosphate, N-acyl glutamate, N- Acyl-N-alkyl amino acid salts, o-alkyl substituted malic acid salts and the like can be mentioned, and those which are safe for the human body can be used.

As the amphoteric surfactant, amino acid type or betaine type carboxylic acid type, sulfate ester type, sulfonic acid type,
There are phosphoric acid ester types, and those that are safe for the human body can be used. For example, N, N-dimethyl-N-
Alkyl-N-carboxymethylammonium betaine, N, N-dialkylaminoalkylenecarboxylic acid, N,
N, N-trialkyl-N-sulfoalkylene ammonium betaine, N, N-dialkyl-N, N-bis (polyoxyethylene sulfate) ammonium betaine, 2-alkyl-1-hydroxyethyl-1-carboxymethyl imidazole Examples thereof include nium betaine.

The compounding amount of the ionic surfactant is preferably in the range of 5 to 50% by weight. Within this range, good detergency can be obtained, and a creamy skin cleanser can be obtained.

The silicic acid anhydride used in the present invention is preferably high-purity ultrafine silicic acid anhydrous powder, and various grades can be mentioned depending on the specific surface area, particle size and the like, but hydrophilic ones are used. Further, ultrafine silicic acid anhydride powder produced by partially mixing aluminum oxide is also used.

The water-soluble polyalkylene glycol used in the present invention is
Polyoxyethylene such as polyoxyethylene polyoxypropylene cetyl ether / polyoxyethylene polyoxypropylene lauryl ether / polyoxyethylene polyoxypropylene decyl tetradecyl ether / polyoxyethylene polyoxypropylene butyl ether Polyoxyethylene polyoxypropylene alkylene glycol, polyoxyethylene Polypropylene glycol, polyoxyethylene polyoxypropylene random copolymer type polymer,
Polyoxyethylene polyoxypropylene glyceryl ether, polyoxypropylene glyceryl ether, polyoxypropylene glyceryl ether phosphoric acid, polyoxyethylene polyoxypropylene ethylenediamine ether, water-soluble ones having an HLB value of 10 or more are 1 or 2 Used in combination of two or more species.

The silicic acid anhydride and the water-soluble polyalkylene glycol are blended in specific amounts and specific ratios. That is, the content of silicic anhydride is 1 to 15% by weight, and the content of silicic acid and hydrophilic polyalkylene glycol is 100: 1 to 1: 1 (weight ratio).
Is. Within this range, the creamy skin cleanser retains a good creamy form at high temperature and at low temperature, has a comfortable feeling in use, and has good stability.

The gel strength of the silicic acid anhydride and the water-soluble polyalkylene glycol increases in proportion to the blending amount of silicic acid anhydride. Even if the water-soluble polyalkylene glycol is excessively blended, it hardly affects the gel strength.

In the present invention, in addition to the above components, a fragrance, a dye such as a dye / pigment, a preservative, a bactericide, an antiphlogistic, a chelating agent, a viscosity modifier, a foaming agent, a foam stabilizer, a wetting agent, A superfat agent, a pearl agent, various drugs and the like can be added. The creamy skin cleansing agent of the present invention can be applied to face wash, hair wash, body wash and the like.

EXAMPLES Next, the present invention will be further described with reference to examples. These do not limit the invention in any way.

Example [1] (Formulation) (% by weight) (1) N-acyl-L-glutamic acid triethanolamine aqueous solution (30%) 50.0 (2) Polyethylene glycol monostearate (5
5) 5.0 (3) Coconut oil fatty acid diethanolamide 5.0 (4) Polyoxyethylene polyoxypropylene random copolymer (molecular weight 500) 2.5 (5) Propylene glycol 10.0 (6) Preservative 0.1 (7) Dye proper amount (8) ) Fragrance 0.2 (9) Silica anhydrous 8.0 (10) Purified water Remaining amount (Production method) A (1) to (6) and (10) are heated and uniformly mixed and dissolved.

After cooling B A, (7) to (9) are added and mixed uniformly.

Defoam CB and fill container.

The cream-type face wash obtained as described above has a beautiful translucent appearance, pH of 6.2, good compatibility with water, a refreshing feeling of use, and a stable appearance. The sex was also good for a long time.

Example [2] (Formulation) (wt%) (1) N-lauroyl-L-glutamate monosodium 5.0 (2) Polyethylene glycol monostearate (5
5) 3.0 (3) Lauric acid diethanolamide 7.0 (4) Coconut oil fatty acid methyl tauride sodium 10.0 (5) Ethylene glycol monostearate 0.5 (6) Polyoxyethylene polyoxypropylene cetyl ether (HLB12.5) 1.5 (7) ) Dipropylene glycol 7.0 (8) Propylene glycol 4.0 (9) Preservative 0.1 (10) Mica titanium 0.1 (11) Perfume 0.2 (12) Dye Appropriate amount (13) Silicic anhydride 7.0 (14) Purified water Remaining amount (production method) A (1) to (9) and (14) are heated to uniformly mix and dissolve.

After cooling BA, (10) to (13) are added and uniformly mixed.

Defoam CB and fill container.

The cream-type face wash obtained as described above has a beautiful appearance that is semi-transparent and has a pearly luster, has a pH of 6.5, has a moisturizing feel, and has a high temperature and a low temperature. There was little change in consistency and stability was good for a long time.

Example [3] (Formulation) (wt%) (1) Potassium laurate 5.0 (2) Polyoxyethylene (2) Sodium lauryl ether sulfate 10.0 (3) Polyoxyethylene (5) Coconut oil fatty acid monoethanolamide 1.0 ( 4) Ethylene glycol distearate 3.0 (5) Polyoxyethylene polyoxypropylene glyceryl ether (HLB16) 2.5 (6) Glycerin 10.0 (7) Propylene glycol 5.0 (8) Preservative 0.1 (9) Perfume 0.2 (10) Dye suitable amount ( 11) Silica anhydrous 10.0 (12) Remaining amount of purified water (manufacturing method) A (1) to (8) and (12) are heated and uniformly mixed and dissolved.

After cooling BA, (9) to (11) are added and mixed uniformly.

Defoam CB and fill container.

The cream-like face wash obtained as described above has a beautiful appearance having a pearly luster, has a pH of 9.5, has good foaming and has a good cleaning effect and an appropriate degreasing effect, and The stability was also good for a long time.

[Effects of the Invention] In order to confirm the stability of the creamy skin cleansing agent of the present invention, Example [1] and Comparative Examples [1] to
According to [3], the gel strength was measured and the stability test with time was performed.

Comparative Examples [1] to [3] (Prescription) (wt%) (Production Method) A (1) to (6) and (10) are heated to uniformly mix and dissolve them.

After cooling B A, (7) to (9) are added and mixed uniformly.

Defoam CB and fill container.

Comparative Example [1] has a smaller amount of silicic acid than Example [1]. Comparative Example [2] is a composition in which the compounding amount of the polyoxyethylene polyoxypropylene random copolymer (molecular weight 500) is reduced from that of Example [1], and the ratio of silicic anhydride and water-soluble polyalkylene glycol is Is 160: 1. Comparative Example [3] excludes the polyoxyethylene polyoxypropylene random copolymer type polymer (molecular weight 500) of Example [1].

The gel strength is measured by Rheometer manufactured by Fudo Kogyo Co., Ltd.
It was carried out by determining the stress peak using NRM-2002J. Samples are those of Example [1] and Comparative Example [1]-
The one stored at 20 ° C. for 1 day after the production of [3] was used.

In addition, in the temporal stability test, Example [1] and Comparative Examples [1] to [3] were used, and the state after 1 month was observed under each storage condition of 5 ° C, 20 ° C, and 40 ° C. It was done by doing.

Table 1 shows the results of the gel strength measurement and the stability test with time.

As is clear from the results in Table 1, the creamy skin cleansing agent of the present invention had good gel strength and was extremely excellent in stability over time.

Claims (3)

[Claims] 1. An ionic surfactant, silicic acid anhydride (a component), and a water-soluble polyalkylene glycol (b component), and the a component is 1 to 15% by weight. (B) A creamy skin cleansing agent characterized in that the ratio of the components is 100: 1 to 1: 1 (weight ratio). 2. The creamy skin cleansing agent according to claim 1, wherein the ionic surfactant is an anionic surfactant and an amphoteric surfactant. 3. A water-soluble polyalkylene glycol is polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxypropylene random copolymer, polyoxyethylene polyoxypropylene glyceryl ether, The creamy skin cleansing agent according to claim 1, which is polyoxypropylene glyceryl ether, polyoxypropylene glyceryl ether phosphoric acid, or polyoxyethylene polyoxypropylene diamine ether.