JPS6027720B2 - Improved solid detergent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solid detergent with improved adhesion based on an N-long chain acyl acidic amino acid monoalkali salt.

Solid detergents based on N-long chain acyl acidic amino acid monoalkaline salts have excellent moldability and good cleaning power not only in soft water but also in hard water. Because it is acidic, it is less irritating to the skin, and it also has excellent features not found in conventional solid detergents, such as providing a moist feeling after use.

However, solid detergents based on N-long chain acyl acidic amino acid monoalkali salts have the disadvantage that if left in a soap box after use, they will stick firmly and become difficult to remove from the soap box when reusing. was strongly desired. It is an object of the present invention to provide a solid detergent with improved adhesion properties based on N-long chain acyl acidic amino acid monoalkali salts.

Conventionally, methods for improving the adhesion of solid detergents based on N-long chain acyl acidic amino acid salts include adding colloidal magnesium aluminum silicate (see Samurai Publication No. 49-5404) and N-long chain detergents. Although a method of adding an alkali metal salt of a chain acyl acidic amino acid (see JP-A-50-160304) has been disclosed, the improvement effect is insufficient and a satisfactory solid detergent cannot be obtained.

The improved solid detergent of the present invention is characterized by containing the following components 'B} and {C} as essential components.

(2) Monoalkali salts of N-long chain acyl acidic amino acids having an acyl group having 8 to 22 carbon atoms.

'B' At least one salt selected from the group consisting of water-soluble salts of inorganic acids, dicarboxylic acids, and oxyacids.

N-long chain acyl neutral amino acid and/or N-long chain acyl acidic amino acid having no 'C' carbon atoms and 22 acyl groups.

What is used as the base of the solid detergent of the present invention is an N-long chain acyl acidic amino acid monoalkaline salt, which is a bad ingredient.

This N-long chain acyl acidic amino acid has an acyl group having 8 to 22 carbon atoms, such as N-long chain acylaspartate, N-long chain acyl glutamate, N-long chain acyl cysteate, N-long chain acyl homocysstates and the like. Types of salt include alkali metal salts,
Mention may be made of ammonium salts, basic amino acid salts and water-soluble amine salts. Components {B} and {C}' are each modifiers.

The components used as modifiers in the solid detergent of the present invention (salts B-) are the components that release free N when added as an aqueous solution to the monoalkaline IJ salt of the base N-long chain acyl acidic amino acid.
- Water-soluble salts of acids having an acidity capable of producing long-chain acyl acidic amino acids, such as water-soluble salts of inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, and the following structural formulas (1), (0
) is at least one selected from the water-dropping salts of organic acids represented by: The base metal forming the water-soluble salt of component (1) is preferably an alkali metal such as sodium or potassium. Examples of water-soluble salts of inorganic acids include sodium chloride, sodium phosphate, potassium phosphate, and the like. In particular, water-soluble salts of phosphoric acid are known to have an effect of improving adhesion and at the same time prevent coloring of solid detergents, and are therefore one of the preferred adhesion agents. (1) HOOC-R, one COO day (
In the formula, R is a saturated or unsaturated alkyl group with 1 to 5 carbon atoms, which may be straight chain or branched.)
water dropable salt of dicarboxylic acid.

(0) R2R3(OH)COO[In the formula, R2 and R3 are each hydrogen, a short-chain alkyl group (a saturated or unsaturated alkyl group having 1 to 4 carbon atoms, and may be a straight or branched chain) ), one CQCOOH, or one CH(OH)COO].

Preferred compounds represented by formula (1) are water-soluble salts of malonic acid, succinic acid, and fumaric acid. Preferred compounds represented by formula (b) are water-soluble salts of lactic acid, phosphoric acid, and citric acid. Component (q is an N-long chain acyl neutral amino acid and/or an N-long chain acyl acidic amino acid having no 8 or 22 carbon atoms).

N-long chain acyl neutral amino acids include N-long chain acyl sarcosine and N-long chain acyl-N-methyl-3-alanine, and N-most chain acyl acidic amino acids include N-
Examples include longest chain acyl glutamic acid, N-long chain acylaspartic acid, N-long chain acyl cystic acid, and N-long chain acyl homocystic acid. The above-mentioned components {B) and {
C' contains both as essential components,
Their synergistic effect significantly improves adhesion.

When each of the components {B- and B} is used alone, the effect of improving adhesion is poor, or in some cases, there is a tendency to even increase the adhesion. Ingredients (B} and {C' used as modifiers in the solid detergent of the present invention have less amount that impairs other physical properties such as foaming properties of the solid detergent compared to the conventional modifiers mentioned above) , N-long chain acyl acidic amino acid monoalkaline salts can be freely incorporated into solid detergents.

The amount of these modifiers added depends on the adhesion improvement effect, detergency,
Considering the balance with the physical properties required for a solid detergent, such as foaming properties, the following results. That is, the solid detergent of the present invention contains 0.3 to 10% by weight, preferably 0.
．． It is added at a level of 5 to 5% by weight, and the component [C}'ma2~
It is added at a level of 4% by weight, preferably 5-20% by weight.

Depending on the purpose of use, the solid detergent of the present invention may appropriately contain foaming enhancers, binders, heat insulating agents, fragrances, pigments, dyes, and other adjuvants commonly used in solid detergents. .

The method for producing the solid detergent of the present invention includes using the N-long chain acyl acidic amino acid monoalkali salt of the component as a base, adding component {B) thereto together with an appropriate amount of water, and then adding component {C
}, add auxiliary agents if necessary, thicken, and then mold by molding, as described above, add the component [B - and an appropriate amount of water and auxiliary agents, kneading and molding, and adding an acid having an acidity capable of producing a free N-most chain acyl acidic amino acid to the base of the component leg as an aqueous solution or fine powder. By adding an adjuvant and an appropriate amount of water to the mixture and kneading it, a predetermined amount of component {C}, N-
There is a method in which the last chain acyl acidic amino acid and the salt of component [B} are formed all at once, and then molded.

In the case of the third method, some of the added components may remain as free acids, but the presence of these free acids does not impede the improvement of adhesion. The present invention will be explained in more detail with reference to Examples below.

Example 1 N-mixed fatty acid acyl-L-glutamic acid monosodium salt (trade name “Amisoft GS-11 manufactured by Ichimi-no-moto ■)” 6
To a mixture of 4 parts (indicates parts by weight, the same applies hereinafter) and an aqueous solution of 3 parts of sodium chloride dissolved in 13 parts of water,
N-most chain acyl having the same fatty acid composition as GS-11
After adding and mixing 2 parts of L-glutamic acid (hereinafter referred to as GA) melted, the mixture was thoroughly kneaded using a small roll.

The lacrimal paste was extruded using a small soap extruder with a nozzle temperature maintained at about 40 qo, and the resulting bar-shaped detergent was stamped using a foot-type stamping machine. Comparative Examples 1 to 3 Solid detergents were molded in the same manner as in Example 1, except that GA and/or sodium chloride were not blended.

The adhesion strength of the solid detergents of the above Examples and Comparative Examples was measured.

The adhesion strength was determined by attaching a circular polyethylene test piece with a diameter of 5 ribs to a solid detergent whose surface had been wetted with water, leaving it indoors for 2 hours, and using a spring scale with a maximum weight of 4k9.
The force required to pull up and peel off at a rate of 10 k9 is expressed in k9. The smaller the adhesion strength value, the weaker the adhesion of the solid detergent to the soap box. Table 1 The numerical values of composition ratios in Table 1 indicate weight %.

(hereinafter the same machine) Comparative Example 1 is a case where no modifier is included, Comparative Example 2 is a case where only component legs are included, and Comparative Example 3 is a case where only component legs are included.
is a case where only } is included in the component. In Example 1, compared to Comparative Example, foaming was hardly impaired in the hand washing test. Example 2, Comparative Example 4 Water containing 2.5 parts of GS-118 and 1.5 parts of phosphoric acid 10.
After adding 7 parts of melted cetanol to the mixture, GA and sodium phosphate were formed by mixing thoroughly with a small roll, and this was molded according to Example 1 to form a solid detergent. Obtained.

It is estimated that this solid detergent contains about 7% GA and about 19% sodium salt of phosphoric acid on an anhydride basis.
As Comparative Example 4, a solid detergent of Example 2 except for the phosphoric acid was obtained in the same manner. The adhesion strength of the solid detergent of Example 2 was 1.
1k9, and the adhesion strength of the solid detergent of Comparative Example 4 was 2.5k9.
Met.

No difference was observed between the two regarding foaming. Example 3, Comparative Example 5N-Chassis oil fatty acid acyl-L-glutamic acid monosodium salt (trade name "Amisoft CS-1")
1J (manufactured by Ajinomoto Co., Inc.), add fine powder of sodium malate, mix well, add water, and then add the molten N-
Lauroylsarcosine and Setanol L were added.

This mixture was kneaded and molded according to Example 1. As a comparative example, a solid detergent was obtained in the same manner as described above except that N-lauroylsarcosine and sodium malate were removed. The results of the adhesion strength of the solid detergents of Example 3 and Comparative Example 5 are shown in Table 2.

Table 2 Example 4 Water containing 55 parts of monosodium N-lauroyl-DL-glutamate and 20 parts of monopotassium N-myristyl-L-aspartate and 3.0 parts of citric acid monohydrate 1
After adding 8.0 parts of melted myristyl alcohol to the mixture, the mixture was thoroughly kneaded with a small roll to form sodium citrate, potassium citrate, N-
Lauroyl DL-glutamic acid, N-myristyl-
L-aspartic acid was produced and molded according to Example 1 to obtain a solid detergent.

Example 5 A solid detergent having the following composition was molded according to Example 1.

GS-11 75% by weight N-
lauroyl-N-methyl-8-alanine
7 Sodium succinate hexahydrate 3 Stearyl alcohol 5 Water 10 After using the solid detergents of Examples 1 to 5 and the solid detergents of the respective compositions excluding the modifier several times for actual hand washing, the soap After putting the detergents in a box and leaving them indoors for a day and night, we compared how easy it was to take them out of the soap box. In both cases, it was much easier to take out the solid detergent containing the modifier of the example from the soap box. .

As is clear from each of the Examples and the measurement results of adhesion strength, the solid detergent of the present invention has adhesion properties that hardly impair foaming due to the N-long chain acyl acidic amino acid monoalkali salt base. It was recognized that this is an improved solid detergent.

Claims (1)

[Scope of Claims] 1. A base consisting of the following component (A), containing as essential components 0.3 to 10% by weight of component (B) and 2 to 40% by weight of component (C) per solid detergent. A solid detergent with improved adhesion properties. (A) N-long chain acyl acidic amino acid monoalkaline salt having an acyl group having 8 to 22 carbon atoms. (B) At least one salt selected from the group consisting of water-soluble salts of inorganic acids, dicarboxylic acids, and oxyacids. (C) N-long chain acyl neutral amino acid and/or N-long chain acyl acidic amino acid having an acyl group having 8 to 22 carbon atoms. 2 The N-long chain acyl acidic amino acids of the N-long chain acyl acidic amino acid monoalkaline salt of component (A) are N-long chain acyl glutamic acid, N-long chain acylaspartic acid, N-long chain acyl cysteic acid, and N-long chain acyl acidic amino acid. - The solid detergent according to claim 1, which is at least one selected from the group consisting of long-chain acyl homocysteic acids. 3. The monoalkali salt of the N-long chain acyl acidic amino acid monoalkali salt of component (A) is at least one selected from the group consisting of alkali metal salts, ammonium salts, basic amino acid salts, and water-soluble amine salts. A solid detergent according to claim 1. 4. The solid detergent according to claim 3, wherein the alkali metal salt is a sodium salt. 5. The solid detergent according to claim 1, wherein the inorganic acid is selected from the group consisting of hydrochloric acid, sulfuric acid, nitric acid, and phosphoric acid. 6. The solid detergent according to claim 1, wherein the dicarboxylic acid is represented by structural formula (I). (I) HOOC-R_1-COOH (In the formula, R_1 is a saturated or unsaturated alkylene group having 1 to 5 carbon atoms, and may be a straight chain or branched chain) 7 Oxyacid is represented by structural formula (II) A solid detergent according to claim 1. (II) R_2R_3C(OH)COOH [wherein R_2 and R_3 are each hydrogen, a short chain alkyl group (a saturated or unsaturated alkyl group having 1 to 4 carbon atoms, which may be either straight chain or branched chain), -C
H_2COOH, or -CH(OH)COOH]8 Claims in which the dicarboxylic acid represented by structural formula (I) is at least one selected from the group consisting of malonic acid, succinic acid, and fumaric acid. Solid detergent according to item 6. 9. The solid detergent according to claim 7, wherein the oxyacid represented by structural formula (II) is at least one selected from the group consisting of lactic acid, malic acid, and citric acid. 10. The solid detergent according to claim 1, wherein the water-soluble salt of component (B) is an alkali metal salt. 11. The solid detergent according to claim 10, wherein the alkali metal salt is a sodium salt. 12 The N-long chain acyl neutral amino acid of component (C) is N-
Long chain acyl sarcosine and/or N-long chain acyl-
The solid detergent according to claim 1, which is N-methyl-β-alanine. 13 Component (C) N-long chain acyl acidic amino acid is N-
Claim 1 which is at least one selected from the group consisting of long chain acyl glutamic acid, N-long chain acylaspartic acid, N-long chain acyl cysteic acid, and N-long chain acyl homocysteic acid. solid detergent.