JPS5914515B2 - transparent solid detergent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION 15 The present invention relates to a novel transparent solid detergent based on an N-long chain acyl acidic amino acid salt.

Conventionally, fatty acid soaps have been used as the main ingredient in transparent solid detergents, but fatty acid soaps are formulated with low-grade fatty acids to improve solubility, foaming, and detergency. Free alkalis in fatty acid soaps and pH increases due to hydrolysis during use may irritate the skin. As a method for improving these drawbacks, a method of adding a superfatting agent to alleviate the irritation caused by alkali has been proposed95. One method for this is to mix N-long chain acyl glutamate with fatty acid soap, but since fatty acid soap and N-long chain acyl glutamate have poor compatibility, it is easy to make a transparent solid soap. Therefore, it was necessary to add a binder to increase the compatibility between the two. (Unexamined Japanese Patent Publication No. 51-24606) In order to eliminate the drawbacks of conventional transparent soaps based on fatty acid soaps, the present inventors used a surfactant other than fatty acid soaps as a base for transparent solid detergents. As a result of intensive efforts focusing on 35 points, it was discovered that a specific N-long chain acyl acidic amino acid salt could be used as a base, and the present invention was completed.

Al--that is, the present invention is a transparent solid consisting of the following components (A) and (B), and characterized in that the weight ratio of components (4) and (B) is 9:1 to 4:6. It concerns detergents.

(A) N long-chain acyl acidic amino acid salt having an acyl group having 10 to 20 carbon atoms and having a degree of neutralization of 1.5 equivalents or more.

13) At least one compound selected from polyhydric alcohols having 2 to 6 carbon atoms, carbohydrates having 6 or 12 carbon atoms, thiourea, urea, and maltitol.

Components (4) used as a base for the transparent solid detergent of the present invention
) is selected from N long chain acyl glutamate, N long chain acyl aspartate, N long chain acyl cysteate, and N long chain acyl homocysteinate. At least one type.

Examples of salts of N long-chain acyl acidic amino acids include sodium salt, monoethanolamine salt, diethanolamine salt, triethanolamine salt, 2-amino-2-
Examples include alkali salts such as methyl-1-propanol salt and 2-amino-2-methyl-1,3-propanediol salt.

The N long-chain acyl acidic amino acid salt of the present invention can be easily obtained by neutralizing the N long-chain acyl acidic amino acid with an alkali, but the degree of neutralization at this time affects the transparency of the solid detergent. Oyobasu. That is, in order to obtain a good transparent solid detergent, the degree of neutralization of the alkali against the N long-chain acyl acidic amino acid must be greater than sesqui (1.5 equivalent) neutralization. An N long-chain acyl acidic amino acid salt having a degree of neutralization of less than 1.5 equivalents cannot be used as a transparent solid detergent in any composition ratio with the above-mentioned component (B). Note that the N long-chain acyl acidic amino acid monoalkali salt and the N long-chain acyl acidic amino acid dialkali salt may be mixed so that the degree of neutralization of the mixture is 1.5 equivalents or more.
The compound of component (B) is used to make the base component (4) transparent and solid.

The compound of component (B) has 2 to 6 carbon atoms as described above.
at least one selected from polyhydric alcohols, carbohydrates having 6 or 12 carbon atoms, thiourea, urea, and maltitol. Examples of polyhydric alcohols include:
Examples include ethylene glycol, propylene glycol, glycerin, diglycerin, and Solpit. Carbohydrates include, for example, glucose, fructose, and sucrose. Maltitol is a type of disaccharide alcohol, and is obtained by reducing maltose.
It is a common name for 0-α-glucopyranosyl sorbitol. Component B) in the present invention is an essential component for clarifying and solidifying the transparent solid detergent of the present invention, and the ratio of components (4) and (B) is 9:1 to 4:1 by weight. 6, preferably 8:2 to 5:5.

If component (B) is less than 9:1, the resulting transparent solid detergent will not have sufficient hardness and will have poor transparency;
The above will weaken the solid detergent and increase the hygroscopicity of the product, resulting in the surface of the solid detergent becoming sticky, and in some cases, crystals may form on the surface of the solid detergent, reducing the product value. descend. The degree of neutralization of the N long-chain acyl acidic amino acid salt of the present invention and the component (BP blending ratio) are significantly related with respect to transparent solidification. Therefore, a good transparent solid detergent can be obtained with a small amount of component (8).The transparent solid detergent of the present invention contains the following general anionic surfactants for the purpose of adjusting the detergency. It is possible to add a surfactant, an amphoteric surfactant, and a nonionic surfactant within a range that does not inhibit transparent solidification.These are mixed in an amount of O to 25% by weight per solid detergent.(a) Fatty acid soap
(b) Higher alcohol sulfate ester salt (c) Polyoxyethylene higher alcohol sulfate ester salt (d) Higher alcohol phosphate ester and its salt (c) Polyoxyethylene higher alcohol phosphate ester and its salt (f) Polyoxyethylene Higher fatty acid phosphate ester and its salt (g) Sulfonated higher fatty acid salt and alcohol ester salt of sulfonated higher fatty acid (h) Sulfosuccinate ester salt of higher alcohol (1) Isethionic acid higher fatty acid ester salt (j) Acyl taurine salt (k) α-Sulfohyper alcohol acetate salt
(1) Lauric acid diethanolamide, stearic acid diethanolamide, lauric acid monoethanolamide,
Condensates of higher fatty acids such as stearic acid monoethanolamide and alkylolamines and their ethylene oxide adducts (e) Polyoxyethylene higher fatty acid monoethanolamide phosphate ester salts (n) N-long chain acyl sarcosine salts, N- N long chain acyl amino acid salts such as long chain acyl-N-alkyl-β-alanine salts and N-acyl peptides (0) 2-alkyl-N-
Carboxymethyl-N-hydroxyethylimidazolinium betaine (p) Higher alkylaminopropionate such as lauryl aminopropionate (q) Higher alkyliminodiacetate such as lauryl iminodiacetate (r) Higher alkyl dimethyl betaine , higher alkyl dihydroxyethyl betaine (s) N-alkyloyl-N'-(2-hydroxyethyl)-N'-carboxymethylethylenediamine salt, N-alkyloyl-N(
Amine amide compounds such as 2-hydroxyethyl)-N/-N/-biscarboxymethylethylenediamine salt.

Furthermore, depending on the purpose of use, fragrances, pigments, dyes, and other auxiliary agents commonly used in transparent bar soaps can be added as appropriate.

The transparent solid detergent of the present invention is easily manufactured by the frame line method.

That is, a mixture of component (B) and other surfactants and additives as necessary, with appropriate amounts of water and ethanol is heated to 80-85°C, uniformly dissolved, and then poured into a mold. Cool and solidify. The transparent solid detergent according to the method of the present invention is
It has the following performance and advantages: (1) Since the pH during use is slightly acidic or slightly alkaline, it is advantageous for people who have a constitution that prevents them from using soap because it is too alkaline.

(2) After hand washing, the product feels refreshing and does not leave a slimy residual feeling like soap. (3) When used to wash the face, the product leaves a moisturized feel without the sticky feeling characteristic of soaps. (4) Transparent soap made using the conventional frame line method requires a drying period of 2 to 3 months to become transparent and solid, whereas the transparent solid detergent of the present invention becomes transparent immediately after cooling and solidifying, and the drying period is short. About 20 to 30 days is sufficient.

Next, the present invention will be explained using examples.

Example 1 The above four ingredients were heated to 80-85°C in a four-piece flask, stirred, and uniformly dissolved, then taken out, poured into a mold, and left at room temperature.

This product became transparent and solidified immediately after cooling and was usable, but it took about 1 month to fully dry. Comparative Example 1 A transparent solid detergent was obtained in the same manner as in Example 1.

Example 2 A transparent solid detergent was obtained according to Example 1.

Example 3 A transparent solid detergent was obtained according to Example 1.

Example 4 A transparent solid detergent was obtained in the same manner as in Example 1.

Example 5 A transparent solid detergent was obtained in the same manner as in Example 1.

Comparative Example 2 Produced according to Example 1.

The solid detergents obtained in Examples 1 to 5 and Comparative Examples 1 and 2 were dried for about one month and then tested for transparency and hardness.

The results are shown in the schedule. Example 6 Example 7 A transparent solid detergent was obtained according to Example 1.

The transparent solid detergents of Examples 1 to 9 were all transparent immediately after cooling, did not irritate the skin during use, and could be easily taken out for reuse even if left in a soap box after use.

Claims (1)

[Claims] 1. A transparent solid comprising the following components (A) and (B), and characterized in that the weight ratio of the components (A) and (B) is from 9:1 to 4:6. detergent. (A) N-long chain acyl acidic amino acid salt having an acyl group having 10 to 20 carbon atoms and having a degree of neutralization of 1.5 equivalents or more. (B) At least one compound selected from polyhydric alcohols having 2 to 6 carbon atoms, carbohydrates having 6 or 12 carbon atoms, thiourea, urea, and maltitol. 2 The N-long chain acyl acidic amino acid salt of component (A) is
- long chain acyl glutamate, N- long chain acylaspartate, N- long chain acyl cysteate, and N-
The transparent solid detergent according to claim 1, which is at least one selected from long-chain acyl homocysteinates. 3 The salt of the N-long chain acyl acidic amino acid salt of component (A) is a sodium salt, a monoethanolamine salt, a diethanolamine salt, a triethanolamine salt, a 2-amino-2
-methyl-1-propanol salt, and 2-amino-2
-Methyl-1,3-propanediol salt.The transparent solid detergent according to claim 1. 4. The transparent solid detergent according to claim 1, wherein the polyhydric alcohol of component (B) is at least one selected from ethylene glycol, propylene glycol, glycerin, diglycerin, and sorbitol. 5. The transparent solid detergent according to claim 1, wherein the carbohydrate of component (B) is at least one selected from glucose, fructose, and sucrose.