JPH0820793A - Detergent composition - Google Patents

Abstract

PURPOSE:To obtain a detergent composition excellent in lather properties, moist skin feel after drying, etc., by mixing a specific polyoxyethylene fatty acid amide ether sulfate with a specific water-soluble silk peptide in a specific weight proportion. CONSTITUTION:A polyoxyethylene fatty acid amide ether sulfate (A) represented by formula I (wherein R<1> is a 7-21C alkyl or alkenyl; M is an alkali metal, an alkaline earth metal, ammonium, or a cationic residue of a basic amino acid or an alkanolamine; and (m) is 2-20) (e.g., sodium polyoxyethylene lauramide ether sulfate) is mixed with a water-soluble silk peptide (B) represented by formula II (wherein R<2> is an amino-acid side chain derived from silk and contained in fibroin peptide; and (n) is 2-50) in a weight ratio of (99:1) to (70:30). Optional ingredients, e.g. a thickener and a humectant, may be incorporated. Thus, a detergent composition is obtained which is reduced in skin or hair irritation and in slimy feel during rinsing.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a cleaning agent which is less irritating to the skin and hair, has a strong foam when used, has less slimy feel when rinsed, and gives a dry feel to the skin and hair. It relates to a composition.

[0002]

2. Description of the Related Art Conventionally, fatty acid soap has been used as a cleaning agent for the body for many years. Generally, fatty acid soap leaves a refreshing feel on the skin after washing, but since it itself is alkaline, it may cause alkali damage, and is not suitable for people with weak skin or infants. Therefore, recently, a polyoxyethylene fatty acid amide ether sulfate type surfactant has been widely used as a surfactant having no alkali damage and less skin irritation. However, although these polyoxyethylene fatty acid amide ether sulfate type surfactants have less skin irritation, they have poor foam quality during use, have a slimy feel during rinsing, and have a less dry skin feel. Therefore, it was not always satisfactory as a personal cleansing agent.

In recent years, various attempts have been made to add various peptides to give various added values to detergents and cosmetics. For example, the following techniques have been disclosed. .

(A) A cosmetic composition in which a water-soluble silk peptide is combined with an anionic surfactant and an amphoteric surfactant has been disclosed, and attempts are made to reduce irritation and improve foam stability (Japanese Patent Laid-Open No. Hei 3). -261706).

(B) Anionic surfactant A shampoo composition containing a surfactant and a chelating agent and a peptide having an average molecular weight of 400 to 1000 is disclosed, and it is shown that the shampoo composition has a rinse effect and a calcium re-deposition preventing effect. (Japanese Patent Laid-Open No. 63-150212).

However, in both the prior arts (a) and (b),
No discussion has been made on the elimination of the slimy feeling when rinsing the detergent and the improvement of the dry feeling of the skin.

[0007]

The problems to be solved and used by the present invention include less irritation to the skin and hair, strong foaminess during use, less slimy feeling during rinsing, and further dry skin and hair. The present invention provides a detergent composition which gives a firm feel to the skin.

[0008]

Means for Solving the Problems The present inventor has found that the skin and hair are less irritating, the foam is strong during use, the sliminess is less during rinsing, and the skin and hair after drying have a firm feeling. As a result of intensive studies to obtain a detergent composition to be given, it was found that the above problems can be easily solved by combining a polyoxyethylene fatty acid amide ether sulfate type surfactant and a water-soluble silk peptide, and the present invention Was completed. That is, the present invention provides a polyoxyethylene fatty acid amide ether sulfate compound represented by the following general formula (1) and a water-soluble silk peptide represented by the following general formula (2) in a weight ratio of 99: 1 to 70:30. The present invention relates to a detergent composition, characterized in that

[Polyoxyethylene fatty acid amide ether sulfate compound]

[0010]

Embedded image

(Wherein R ¹ represents an alkyl group or alkenyl group having 7 to 21 carbon atoms, M represents an alkali metal, alkaline earth metal, ammonium group, basic amino acid or cation residue of alkanolamine, m is 2 to 2
Represents an integer of 0) [Water-soluble silk peptide]

[0012]

[Chemical 4]

(In the formula, R ² represents an amino acid side chain constituting a fibroin peptide derived from silk, and n represents an integer of 2 to 50) In the detergent composition of the present invention, the above-mentioned general formula (1 ) The polyoxyethylene fatty acid amide ether sulfate compound represented by the formula (4) and the water-soluble silk peptide represented by the general formula (2) have a weight ratio of 99: 1 to 70:30, preferably 95: 5 to 85:15. Is. Further, the total content of the polyoxyethylene fatty acid amide ether sulfate compound and the water-soluble silk peptide in the detergent composition of the present invention is preferably 15 to 100%. When the weight ratio of the polyoxyethylene fatty acid amide ether sulfate compound and the water-soluble silk peptide in the cleaning composition of the present invention and the total content of both components are out of the above ranges, there is no irritation to the skin and hair. The fact that there is no slimy feeling at the time of rinsing and the good feeling of dryness after drying are not all satisfied. Moreover, the original detergency and the effect of improving the foam quality are also insufficient.

In the detergent composition of the present invention, the polyoxyethylene fatty acid amide ether sulfate compound represented by the above general formula (1) uses, for example, a fatty acid having 8 to 22 carbon atoms as a starting material, and uses it as a lower alcohol. It can be produced by esterification, amidation with monoethanolamine, subsequent reaction with ethylene oxide to oxyethylenate, sulfation, and neutralization with a basic compound.

The acyl group (R ¹ CO
-) Is a fatty acid residue of a straight chain or branched chain saturated fatty acid having 8 to 22 carbon atoms or a saturated fatty acid, and examples thereof include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, and olein. Examples thereof include acids or fatty acid residues of mixed fatty acids such as coconut oil fatty acid, palm kernel oil fatty acid, and hardened beef tallow fatty acid.

The number of moles of ethylene oxide added represented by m in the general formula (1) is 2 to 20, preferably 3
~ 6. When m is less than 2, foaming properties and solubility of the resulting detergent composition are insufficient, and when m exceeds 20, a composition having a mild degreasing power cannot be obtained.

Alkali metals such as sodium and potassium,
It represents a cation residue of an alkaline earth metal such as calcium or magnesium, an ammonium group, an alkanolamine such as triethanolamine, or a basic amino acid such as lysine or arginine. The water-soluble silk peptide of the general formula (2) used in the present invention is a method in which silk fibers are chemically decomposed by treatment with an acid or an alkali, or a method in which an enzyme such as a protease is used for enzymatic decomposition. Any solubilized water-soluble silk peptide having an average molecular weight of about 200 to 5,000 or a dried product thereof is particularly preferable, as long as it is solubilized by such as. If the average molecular weight is less than 200, the peptide content is small, and if it exceeds 5,000, the solubility decreases, which is not preferable.

In the detergent composition of the present invention, if necessary, a thickener such as fatty acid di- or monoethanolamide, glycols such as glycerin and 1,3-butylene glycol, an emollient agent such as ester oil, Hyaluronic acid, collagen, chitin, moisturizers such as chitosan, aloe extract, cell activating agent such as placenta extract, allantoin, anti-inflammatory agents such as glycylate, zinc pyrithione, antidandruff agents such as piroctone olamine, fragrance, Dye etc. can be added.

The detergent composition of the present invention may have any dosage form, and may be any dosage form such as liquid, paste, gel, powder and solid. The use is optional, but typical examples thereof include kitchen detergents, hard surface cleaners, facial cleansers, cleansing foams, body shampoos, hair shampoos and the like.

[0020]

The present invention will be described in more detail with reference to the following examples. Each test method in the examples was performed as follows.

<Test Method> 1) Sliminess test 20 panelists 20 to 40 years old were made to wash their hands and forearms three times with warm water of about 40 ° C. using 5 ml of a sample taken in a bath sponge. The slickness after rinsing was evaluated according to the following criteria, and the average value of the scores was obtained. There is no slimy feeling ........ 4 points. There is almost no slimy feeling ..... 3 points. Clearly ... 1 point.

2) Sit sensation test After the washing and rinsing, the skin sensation after natural drying was evaluated according to the following criteria, and the average value of the evaluation points was calculated. There is no slimy feeling and it is tight ... 4 points There is almost no slimy feeling and it is tight ... 3 points There is a slight slimy feeling, a tight feeling is thin ...・ ・ ・ 2 points The slimy feeling remains clearly and does not sit ・ ・ ・ ・ ・ ・ 1 point.

3) Detergency test In the tests 1) and 2), the detergency as compared with commercially available solid soap was evaluated by the following evaluation. Better than soap ・ ・ ・ ・ ◎ Equivalent to soap ・ ・ ・ ○ Inferior ・ ・ ・ ・ ・ ・ △ Inferior to soap ・ ・ ・ ×

4) Foam sensation test In the tests 1) and 2), a foam sensation test compared with a commercially available solid soap was evaluated by the following evaluations. Better than soap ・ ・ ・ ・ ◎ Equivalent to soap ・ ・ ・ ○ Inferior ・ ・ ・ ・ ・ ・ △ Inferior to soap ・ ・ ・ ×

5) Protein denaturation test (evaluation of stimulant alleviation effect) Using the aqueous high performance liquid chromatography, the ovalbumin denaturation rate when the sample was added to the ovalbumin pH7 buffer solution so that the sample concentration was 1%, , 220 nm absorption peak, and calculated from the following formula.

[0026]

[Equation 1]

However, Ho: the height of the 220 nm absorption peak of ovalbumin Hs: 22 when the sample was added to the ovalbumin buffer solution
The standard for evaluating the height of the absorption peak at 0 nm was set as follows. ⊚: Ovalbumin denaturation rate of less than 10% ◯: Ovalbumin denaturation rate of 10 to 29% Δ: Ovalbumin denaturation rate of 30 to 49% ×: Ovalbumin denaturation rate of 50% or more.

Examples 1 to 3 and Comparative Examples 1 to 4 Body shampoo compositions having the compositions shown in Table 1 in Examples 1 to 3 and Comparative Examples 1 to 4 were prepared and subjected to the above test. Table 1 shows the results. The water-soluble silk peptide is obtained by dissolving silk in a concentrated salt solution, dialyzing it, and then enzymatically decomposing it. In the general formula (2), n≈10, average molecular weight 1000, and R ² is derived from silk. The peptide which is an amino acid side chain constituting the fibroin peptide is used.

[0029]

[Table 1]

As is clear from the results shown in Table 1, the detergent compositions of the present invention of Examples 1 to 3 containing the polyoxyethylene fatty acid amide ether sulfate compound and the water-soluble silk peptide in specific proportions were , Sit feeling, protein denaturation test, detergency test, and foam feel are all excellent in the test items, while comparative example 1 of polyoxyethylene fatty acid amide ether sulfate compound alone and comparative example of water-soluble silk peptide alone 2 and the detergents in which the polyoxyethylene fatty acid amide ether sulfate compound and the water-soluble silk peptide were outside the scope of the present invention, were inferior in any of the evaluation items.

Example 4 A face cleanser having the following composition was prepared and used in the above test.

[0032] Ingredient% by weight Polyoxyethylene (3) lauric acid amide ether sulfate (26%) 75 lauric acid monoethanolamide 5 soluble silk peptide (15%) ^* 15 soluble collagen (1%) 1 Methylparaben 0 .1 Citric acid Adjusted to pH = 6.5 Water balance *: n≈, water-soluble silk peptide having an average molecular weight of 1000 was used.

Example 5 A conditioning shampoo having the following composition was prepared,
This was subjected to the above test.

[0034] Ingredient% by weight Polyoxyethylene (6) lauric acid amide ether triethanolamine sulfate (25%) 80 lauric acid diethanolamide 2 water-soluble silk peptide (powder) ^* 3 cationized guar gum 0.3 carboxymethylchitosan 0.2 Methyl paraben 0.1 Glycerin 3 EDTA 0.1 Citric acid Adjusted to pH = 6.5 Water balance *: n≅30, water-soluble silk peptide having an average molecular weight of 3000 was used.

[0035]

[Table 2]

As is clear from the results shown in Table 2, the detergent composition of the present invention was excellent in all items of the slimy feel, the tight feel, the protein denaturation test and the foam feel test.

[0037]

EFFECT OF THE INVENTION The detergent composition of the present invention has good foam quality during use, little slimy feeling after rinsing after washing, excellent dry feeling after drying, and practically less skin irritation. It is extremely useful.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification number Internal reference number FI technical display location C11D 1:32) (72) Inventor Yoshiyuki Kimizuka 2835 Imafuku, Kawagoe City, Saitama Kawaken Fine Chemicals Co., Ltd. Saitama Office

Claims (2)

[Claims] 1. A polyoxyethylene fatty acid amide ether sulfate compound represented by the following general formula (1) and a water-soluble silk peptide represented by the following general formula (2) in a weight ratio of 99: 1 to 70:30. A cleaning composition comprising: [Polyoxyethylene fatty acid amide ether sulfate compound] (In the formula, R ¹ represents an alkyl group or an alkenyl group having 7 to 21 carbon atoms, M represents an alkali metal, an alkaline earth metal, an ammonium group, a basic amino acid or a cation residue of an alkanolamine, and m is 2 Represents an integer of 20) [water-soluble silk peptide] (In the formula, R ² represents an amino acid side chain constituting a fibroin peptide derived from silk, and n represents an integer of 2 to 50) 2. The cleaning agent according to claim 1, wherein the water-soluble silk peptide of the general formula (2) has an average molecular weight of about 200 to 5,000.