JP2002053455A - Skin cleansing preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a skin cleansing preparation having high stability and good usability. SOLUTION: This skin cleansing preparation is characterized by comprising a higher fatty acid salt, an amphoteric polymer and a fatty acid diethanolamide, specifically by comprising the ingredients in (A) a higher fatty acid salt, (B) a copolymer of acrylic acid and a dialkyl diallylammonium salt, or a copolymer of acrylic acid, acrylamide and a dialkyl diallylammonium salt and (C) a fatty acid diethanolamide; wherein especially preferably, the amounts of the ingredients (B) and (C) to be formulated are 0.01-1 wt.% and 0.1-10 wt.%, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a skin cleanser containing a fatty acid soap, an amphoteric polymer and a fatty acid diethanolamide.
More specifically, the present invention relates to a skin cleanser having high stability and usability.

[0002]

2. Description of the Related Art In order to keep skin beautiful, it is necessary to remove excess sebum, waste products, dirt and the like and to clean the skin. In particular, sebum generates lipid peroxide by exposure to light, and may cause inflammation and the like on the skin,
Cleaning the skin is very important.

[0003] The most widely used skin cleansing agent is a solid soap, but a creamy cleansing agent is generally used for cleaning the face. The main component of this creamy detergent is generally fatty acid soap.
By combining fatty acid soaps having 12 to 22 carbon atoms, a highly usable creamy dosage form can be obtained. In addition, for the purpose of improving the detergency or reducing skin irritation, these fatty acid soaps include taurine-based activators such as coconut oil fatty acid methyltaurine salts, alkyl sarcosinate-based activators such as lauroyl sarcosine salts, Anionic surfactants such as acylamino acid surfactants such as N-coconut fatty acid-L-glutamate and amphoteric surfactants such as betaine surfactants such as betaine lauryl dimethylaminoacetate are often blended. . In addition, for improvement of moisture retention and reduction of skin irritation,
It is also common to incorporate a polyhydric alcohol such as glycerin.

[0004]

However, the above-mentioned thing is,
Foaming was good, but there were drawbacks such as creaking during washing and a feeling of tightness in washing up, which is peculiar to fatty acid soap. In order to improve the drawback, the addition of a humectant is known as the most common method, but in reality, conventional humectants do not provide a sufficient improvement effect.

[0005] In addition, those containing a phosphoric acid ester-based or amino acid-based surfactant as a main component have reduced squeaky feeling and firmness compared to fatty acid soaps. It was not satisfactory in terms of refreshing feeling and the like.

[0006]

Means for Solving the Problems The present inventors blended an amphoteric polymer and a fatty acid diethanolamide into a creamy detergent mainly composed of a fatty acid soap to provide excellent foaming and creamy feeling of the foam, as well as a squeaky feeling during washing. ,
A skin cleanser without a feeling of firmness after washing was obtained, and the present invention was completed.

Hereinafter, the present invention will be described in detail. The fatty acid soap which is an essential component of the present invention is not particularly limited. For example, it is a lauric acid soap having 12 carbon atoms to a behenic acid soap having 22 carbon atoms. include. As a specific example,
Lauric acid soap, myristic acid soap, stearic acid soap and the like.

In the present invention, the fatty acid soaps may be used alone or in combination of two or more. The amount is not particularly limited, but is preferably 30 to 50%.

[0009] The second essential component is a copolymer of acrylic acid and a dialkyldiallylammonium salt or a copolymer of acrylic acid, acrylamide and a dialkyldiallylammonium salt. These copolymers are amphoteric polymers, and the amount thereof is not particularly limited, but is preferably 0.01 to 1%, more preferably 0.01% by weight of the composition.
5 to 1%. If the amount is too small, the effect cannot be sufficiently exhibited, and the rinsing feeling and the finish after drying are deteriorated. If the amount is too large, there is no particular problem.

The fatty acid diethanolamide used as the third essential component is not particularly limited, but is preferably a fatty acid diethanolamide having a total carbon number of 9 to 24, and more preferably a fatty acid diethanolamide having a total carbon number of 12 to 20. It is preferable from the viewpoint of feeling. Specific examples include lauric acid diethanolamide, myristic acid diethanolamide, and coconut oil fatty acid diethanolamide.

The fatty acid diethanolamides of the present invention may be used alone or in combination of two or more. The amount of the fatty acid diethanolamides is not particularly limited, but is preferably 0.1 to 10%, more preferably 0.1 to 10% in the composition. 0.5 to 5%. If the compounding amount is too small, the effect cannot be sufficiently exhibited, and the foam quality is too high and the feel is deteriorated. If the amount is too large, there is no particular problem.

The cleaning composition of the present invention may contain, in addition to the above-mentioned essential components, generally-used optional components. For example, anionic surfactants other than fatty acid soap, such as taurine-based activators such as coconut oil fatty acid methyltaurine salt, alkyl sarcosinate-based activators such as lauroyl sarcosine salt, and N-coco oil fatty acid-L-glutamic acid Suitable anionic surfactants such as acylamino acid surfactants such as salts, amphoteric surfactants such as alkyl betaine, amidopropyl betaine, imidazolinium betaine, sucrose fatty acid ester, maltitol fatty acid ester, alkyl glucoside, methyl Examples include nonionic surfactants such as glucoside fatty acid esters, polyhydric alcohols such as glycerin, anti-inflammatory agents such as dipotassium glycyrrhizinate, pigments, fragrances, and various water-soluble and oil-soluble additives depending on purposes.

[0013]

As described above, the skin cleansing agent of the present invention is excellent in foaming and foamy creaminess,
It has no squeaks when washing off and no tightness after washing. Hereinafter, the present invention will be described specifically with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.

[0014]

EXPERIMENTAL EXAMPLE 1 A detergent composition having the composition shown in Example 1 was prepared and subjected to sensory evaluation on foaming, foam quality and feeling during use during face washing.
Furthermore, the base state after storage at 40 ° C. for one month was evaluated by visual observation. The results are shown in Table 1 as a comparative example. In addition, the compounding quantity of each component in prescription is set to weight%.

Example 1 Face Wash Cream (A) Lauric acid 15.0 Myristic acid 5.0 Palmitic acid 10.0 Stearic acid 10.0 Ethylene glycol monostearate 2.0 Palm oil fatty acid diethanolamide 3.0 Glycerin 15. 0 Sodium polyphosphate 0.1 Fragrance trace amount (B) Purified water 28.9 Potassium hydroxide 8.0 (C) Acrylic acid / acrylamide / dialkyl diallyl ammonium chloride copolymer solution (10%) 3.0 Production method: (A) Is heated to 70 to 75 ° C., and while stirring, (B) is added little by little to (A) to saponify, and then (C) is added and cooled to 30 ° C.

Comparative Example A In Comparative Example A, the acrylic acid / acrylamide / dialkyldiallylammonium chloride copolymer solution in the portion (C) was replaced with purified water. (Purified water was adjusted in part (B).)

Comparative Example B In Comparative Example B, the coconut oil fatty acid diethanolamide in the part (A) was replaced with purified water. (Purified water was adjusted in part (B).)

[0018]

[Table 1]

(Evaluation method) Base state after one month ◎: extremely good ：: good ：: pearl disappeared ×: separation foaming 極 め て: extremely good △: good ：: normal ×: poor foam quality ：: very good Fine ○: Fine △: Normal squealing during face washing ◎: Not squeezed at all ○: Not squeezed △: Slight squeal ×: Squeezed Smooth after washing ◎: Not stiff 全 く: Not stiff △: Smooth stiff

From Table 1, it can be seen that the cleaning agent of Example 1 was excellent in use feeling and good in stability over time. From Comparative Example A,
When the amphoteric polymer was lacking, there was a squeaky sensation during face washing and a sense of tightness after face washing, which is unique to fatty acid soap. From the results of Example 1 and Comparative Example B, it is found that the addition of the fatty acid diethanolamide improves the tendency of the amphoteric polymer to lose pearls and the squeaky feeling during face washing.

[0021]

Experimental Example 2 Table 2 shows the results when the amount of the amphoteric polymer acrylic acid / acrylamide / dialkyldiallylammonium chloride copolymer solution was changed in the formulation of Example 1. The experimental method and the evaluation method are the same as in Experimental Example 1. The excess or deficiency of the formulation was corrected with purified water.

[0022]

[Table 2]

[0023]

Experimental Example 3 Table 3 shows the results when the amount of fatty acid diethanolamide was changed in the formulation of Example 1. The experimental method and the evaluation method are the same as in Experimental Example 1. The excess or deficiency of the formulation was corrected with purified water.

[0024]

[Table 3]

The skin cleansers of Examples 2 to 4 were prepared and evaluated. Both are excellent in foaming and foamy creamy feeling,
It gave the skin a smooth feeling after washing.

Example 2 Face Wash Cream (A) Lauric acid 5.0 Myristic acid 20.0 Palmitic acid 10.0 Ethylene glycol monostearate 2.0 Coconut oil fatty acid diethanolamide 2.0 Sodium lauroylmethyl-β-alanine 10 0.0 Glycerin 15.0 Sodium polyphosphate 0.1 Fragrance trace (B) Purified water 24.9 Potassium hydroxide 8.0 (C) Acrylic acid / acrylamide / dialkyl diallyl ammonium chloride copolymer solution (10%) 5.0 Manufacturing method: (A) is heated to 70 to 75 ° C, (B) is added little by little to (A) with stirring, and then saponified, (C) is added, and the mixture is cooled to 30 ° C.

Example 3 Facial Wash Cream (A) Myristic acid 30.0 Palmitic acid 10.0 Ethylene glycol distearate 2.0 Lauric acid diethanolamide 5.0 Coconut oil fatty acid methyltaurine sodium 10.0 Glycerin 15.0 Polyline Sodium acid salt 0.1 Perfume trace amount (B) Purified water 18.9 Potassium hydroxide 8.0 (C) Acrylic acid / acrylamide / dialkyl diallyl ammonium chloride copolymer liquid (10%) 1.0 Production method: 70% of (A) Heat to 加 75 ° C., add (B) to (A) little by little while stirring, saponify, then add (C) and cool to 30 ° C.

Example 4 Facial Wash Cream (A) Lauric Acid 5.0 Myristic Acid 20.0 Palmitic Acid 10.0 Ethylene Glycol Monostearate 1.0 Coconut Fatty Acid Diethanolamide 1.0 N-Polycarbonate Fatty Acid Acylglycine Fatty Acid Liquid 10.0 Glycerin 15.0 Sodium polyphosphate 0.1 Fragrance trace (B) Purified water 25.8 Potassium hydroxide 8.0 (C) Acrylic acid / dialkyl diallyl ammonium chloride copolymer liquid (40%) 2.0 Dipotassium glycyrrhizinate 0.1 Production method: (A) is heated to 70 to 75 ° C, saponified by adding (B) to (A) little by little with stirring, then (C) is added and cooled to 30 ° C I do.

Claims (2)

[Claims] 1. A skin cleanser comprising the following components A to C: A: Higher fatty acid salt B: Copolymer of acrylic acid and dialkyldiallylammonium salt or copolymer of acrylic acid, acrylamide and dialkyldiallylammonium salt C: Fatty acid diethanolamide 2. The skin cleanser according to claim 1, wherein the amount of component B is 0.01 to 1%, and the amount of component C is 0.1 to 10%.