JP2000073090A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a detergent composition capable of preventing reduction in water holding function, averting chapped skin, retaining fine texture, moist and damp skin and decreasing the amount of a surfactant used by making the composition include sericin so as to supply amino acids to skin keratin deficient in the amino acids. SOLUTION: This detergent composition contains preferably 0.001-30 wt.%, more preferably 0.01-15 wt.% sericin such as natural sericin extracted from cocoon or raw silk. The detergent composition is useful for a detergent for kitchen, face washing agent, hand soap, body soap, shampoo for pet, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition which has a remarkably low level of irritation to the skin and imparts a mild water holding power and a moisturizing effect to the skin.

[0002]

2. Description of the Related Art Conventionally, surfactants used in detergents include anionic surfactants having a sulfonic acid group or a sulfuric acid group, such as olefin sulfonate, alkyl sulfate, Alkyl ether sulfates and the like have been used. Actions such as direct irritation of the skin, defatting of the skin, keratolysis, and protein denaturation by these surfactants are the main causes of skin roughness. The cleaning agent often has direct contact with the hand skin at the time of use, and since it is used every day, low irritation to the skin is desired. In order to improve this, many oils, fats and moisturizers, etc., which alleviate the irritation of the surfactant, have been developed. However, considering the oils and fats used in the detergent, and the composition of plant extracts and protein components used as humectants, products that must be recognized as inappropriate for obtaining the expected effects There are many.

[0003]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to compensate for the lack of amino acids in the cuticle keratin and prevent the water retention function from being lowered. An extremely practical cleaning agent that can prevent rough skin, maintain a fine, moist and moist skin, and reduce the amount of surfactants that cause rough skin. It provides a composition.

[0004]

The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention is a detergent composition containing sericin. Sericin used in the present invention is a natural protein,
After sericin contained in the silk fiber is partially hydrolyzed and eluted by a water fork or a chemical scouring method or an enzymatic scouring method, it can be obtained by a precipitation method using a drug or other methods.

[0005] The amino acid composition of sericin, which is a natural protein, is very similar to the natural moisturizing factor (NMF) involved in controlling the water content of the stratum corneum of the skin, and particularly contains a large amount of serine which is rich in hydrophilicity. . As shown in Table 1, the ratio of serine is very high compared to natural proteins such as fibroin and collagen which are generally used as moisturizers, and the moisturizing effect on the skin is particularly remarkable. Become. Furthermore, sericin has a similar amino acid composition to NMF in the stratum corneum of the skin and has an affinity for the skin. Therefore, sericin is adsorbed to proteins in the skin and biochemically binds. Thus, a protective film is formed on the skin surface, and irritation to the skin by the surfactant can be suppressed.

[0006]

[Table 1]

[0007] Sericin itself has a surfactant activity, and a detergent composition containing sericin requires a smaller amount of surfactant than that usually used in detergents and has sufficient air bubbles as a detergent. Power, detergency can be shown.

[0008] In other words, sericin forms a protective coating on the skin surface to suppress direct irritation to the skin, retains moisture in the stratum corneum of the skin with abundant serine, and supplements amino acids in the stratum corneum which is lacking. It shows the effect of reducing the amount of surfactant, which is the main cause of skin roughness, while maintaining sufficient detergency, and provides excellent skin roughness prevention and moisturizing effects that were not seen before. is there.

The content of sericin is 0.001 to 30% by weight, preferably 0.01 to 15% by weight. 0.0
When the content is less than 01% by weight, the effect of sericin is not exerted.
Exceeding the weight percent is not preferred because the viscosity becomes too high and becomes difficult to handle.

The detergent composition of the present invention may optionally contain components generally used in detergents. For example, surfactants, oils, higher alcohols, silicone oils, thickeners, conditioning agents, builders, sequestering agents, solvents, abrasives, pH adjusters, ultraviolet absorbers, bactericides, preservatives, dyes, fragrances, etc. Can be contained.

Examples of the surfactant include anionic surfactants such as olefin sulfonates, alkyl sulfates and alkyl ether sulfates, cationic surfactants such as amine salts and quaternary ammonium salts, phosphate esters, sulfones and the like. An amphoteric surfactant such as an acid type and a carboxylic acid type, and a nonionic surfactant such as an ether type, an ether ester type and an ester type can be used, and are not particularly limited.

The detergent composition may be produced by a general method. Applications include, but are not limited to, kitchen cleaners, facial cleansers, hand soaps, body soaps, pet shampoos, and the like.
In addition, the shape of the present cleaning composition is also arbitrary, such as liquid, solid,
It can be appropriately selected according to the application such as powder.

[0013]

EXAMPLES The present invention will be described in detail with reference to examples, but the present invention is not limited to these examples.

<Evaluation Method> (1) Bubble Force Test The detergent composition was diluted with distilled water so that the pure content of the detergent composition was 0.1%, and the bubble force was measured according to the method described in JIS K3362 (Rosmiles method). (Mm) was measured.

(2) Detergency test 0.1% of Sudan III (red pigment) was added to beef tallow as an indicator, and 5% of this was added to a porcelain dish (diameter 25 cm).
10% by weight as a pure detergent composition
Using a sponge impregnated with 30 g of the prepared solution, the solution was scrubbed at 20 ° C., and the number of dishes that had been washed until the tallow applied to the dishes could no longer be removed was used as the detergency.

(3) Hand Roughness Test 20 female panelists were given a detergent concentration of 5 on one of the left and right hands.
%, The other hand was immersed in warm water at 40 ° C. three times a day for three consecutive days, and the left and right hand roughened state was visually observed. The criteria were set as follows. A: Hand roughness was observed on the sample side of 0 to 2 persons out of 20 persons. ：: Hand roughness was observed on the sample side of 3 to 6 out of 20 persons. Δ: Hand roughness was observed on the sample side of 7 to 14 out of 20 persons. D: Hand roughness was observed on the sample side of 15 to 20 out of 20 persons.

(4) Primary skin irritation test Twenty female panelists were asked to give 0.2% aqueous solution containing 1% detergent.
Then, a patch test bandage impregnated with the mixture was closed and adhered to the inner side of the upper arm for 24 hours, and after removal, the irritation was visually determined. The criteria were set as follows. ◎: 0 to 2 persons among 20 persons showed clear erythema. ：: 3 to 6 out of 20 persons showed clear erythema. Δ: 7 to 14 people among 20 showed clear erythema. X: 15 to 20 persons among 20 persons showed clear erythema.

(5) Usability test Twenty female panelists evaluated the moist feeling and moisturizing property after use by a 5-point method, and the total score was used. The criteria were set as follows. ◎: Total point 80 points or more ○: Total point 60 points to less than 80 points △: Total point 40 points to less than 60 points ×: Total point less than 40 points

[0019]

EXAMPLE 1 Sodium higher alkyl alcohol sulfate (synthetic surfactant) -20% by weight, sericin-1
0% by weight and distilled water-residue were blended to obtain a sericin-containing detergent composition of the present invention. This cleaning composition was evaluated according to the evaluation methods (1) and (2). Table 2 shows the results.

[0020]

EXAMPLE 2 Sodium higher alkyl alcohol sulfate (synthetic surfactant) -15% by weight, sericin-1
The sericin-containing detergent composition of the present invention was obtained by blending 5% by weight and distilled water-residue. This cleaning composition was evaluated according to the evaluation methods (1) and (2). Table 2 shows the results.

[0021]

Comparative Example 1 A detergent composition was prepared by blending -30% by weight of sodium higher alkyl alcohol sulfate (synthetic surfactant) and distilled water-residue. This cleaning composition was evaluated according to the evaluation methods (1) and (2). Table 2 shows the results
Shown in

[0022]

Comparative Example 2 A detergent composition was obtained by blending -15% by weight of sodium higher alkyl alcohol sulfate (synthetic surfactant) and distilled water-residue. This cleaning composition was evaluated according to the evaluation methods (1) and (2). Table 2 shows the results
Shown in

[0023]

[Table 2]

From the evaluation results, the detergent composition of the present invention to which the amount of the synthetic surfactant was reduced and sericin was added showed the same value in both the bubble power and the detergency as compared with the conventional one. In addition, it can be seen that both the bubble power and the cleaning power are clearly superior to those of a cleaning agent in which the synthetic surfactant is simply reduced. Therefore, the detergent composition containing sericin of the present invention can exhibit the same detergency as a conventional detergent composition even when the amount of synthetic surfactant that causes skin roughness is reduced.

[0025]

EXAMPLE 3 Sodium linear alkyl benzene sulfonate (synthetic surfactant) -30% by weight, sericin -3% by weight, distilled water-residue were blended to obtain a sericin-containing detergent composition of the present invention. . This cleaning composition was evaluated according to the evaluation methods (3) to (5). Table 3 shows the results.

[0026]

EXAMPLE 4 Sericin-containing detergent composition of the present invention was obtained by blending -30% by weight of sodium higher alkyl ether sulfate (synthetic surfactant), 3% by weight of sericin, and distilled water-residue. . This cleaning composition was evaluated according to the evaluation methods (3) to (5). Table 3 shows the results.

[0027]

Example 5 Sericin-containing detergent composition of the present invention was obtained by blending -30% by weight of sodium higher alkyl sulfate (synthetic surfactant), 3% by weight of sericin, and distilled water-residue. Evaluation method (3) of this detergent composition
Evaluation was performed according to (5). Table 3 shows the results.

[0028]

Comparative Example 3 A detergent composition was obtained by mixing -30% by weight of sodium linear alkylbenzene sulfonate (synthetic surfactant), 3% by weight of collagen, and distilled water-residue. This cleaning composition was evaluated according to the evaluation methods (3) to (5). Table 3 shows the results.

[0029]

Comparative Example 4 Sodium higher alkyl ether sulfate (synthetic surfactant) -30% by weight, collagen-3
% By weight, distilled water-residue ratio was added to obtain a detergent composition. This cleaning composition was evaluated according to the evaluation methods (3) to (5). Table 3 shows the results.

[0030]

Comparative Example 5 Sodium higher alkyl sulfate (synthetic surfactant) -30% by weight, collagen -3% by weight,
Distilled water and the remainder were blended to obtain a detergent composition. This cleaning composition was evaluated according to the evaluation methods (3) to (5). Table 3 shows the results.

[0031]

Comparative Example 6 Sodium linear alkylbenzene sulfonate (synthetic surfactant) -30% by weight, fibroin-3
% By weight, distilled water-residue ratio was added to obtain a detergent composition. This cleaning composition was evaluated according to the evaluation methods (3) to (5). Table 3 shows the results.

[0032]

Comparative Example 7 Sodium higher alkyl ether sulfate (synthetic surfactant) -30% by weight, fibroin
3% by weight and distilled water-residue were blended to obtain a detergent composition. This cleaning composition was evaluated according to the evaluation methods (3) to (5). Table 3 shows the results.

[0033]

Comparative Example 8 A detergent composition was obtained by mixing -30% by weight of sodium higher alkyl sulfate (synthetic surfactant), 3% by weight of fibroin, and distilled water-residue. This cleaning composition was evaluated according to the evaluation methods (3) to (5). Table 3 shows the results.

[0034]

[Table 3]

From the evaluation results, the detergent of the present invention containing sericin showed rough hands, less irritation to the skin and sufficient moisture retention as compared with the comparative example.

[0036]

EFFECTS OF THE INVENTION The detergent composition of the present invention contains sericin having an amino acid composition similar to the natural moisturizing factor (NMF) involved in regulating the water content of the stratum corneum, and therefore, the amino acid lacking in the stratum corneum It works to compensate for the decrease in moisturizing function. In addition, it has made it possible to reduce the amount of a surfactant that causes skin roughness. By these effects, the skin is prevented from drying, it is possible to maintain a fine, moist and moist skin, and to suppress rough skin.

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[Procedure amendment]

[Submission Date] November 30, 1998 (1998.11.
30)

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

[Table 1]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

[0023]

[Table 2]

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction contents]

[0034]

[Table 3]

Claims (3)

[Claims] 1. A detergent composition comprising sericin. 2. The cleaning composition according to claim 1, wherein the sericin is natural sericin extracted from cocoons or raw silk. 3. The cleaning composition according to claim 1, wherein the content of sericin is 0.001 to 30% by weight.