JPH06330083A - Detergent composition - Google Patents

Abstract

PURPOSE:To obtain a detergent composition, containing an N-acyloxyamino acid salt and improved in retention of foams and foam quality. CONSTITUTION:The composition contains (A) an N-acylserine salt or an N- acylthreonine salt having an acyl group which is an 8-22C fatty acid residue and (B) an 8-22C higher fatty acid salt at (99.5/0.5) to (70/30) weight ratio of the components (A)/(B).

Description

Detailed Description of the Invention

[0001]

The present invention relates to an N-acyl serine salt,
The present invention relates to a detergent composition comprising a combination of an N-acyl threonine salt and a higher fatty acid salt, and more particularly to a detergent composition having improved foam retention and foam quality.

[0002]

2. Description of the Related Art Conventionally, detergent compositions mainly containing anionic surfactants such as shampoos, face soaps and kitchen detergents include higher fatty acid salts, polyoxyethylene alkyl ether sulfates and alkylbenzene sulfonates. It is used. Further, as a mild surfactant, N-
Acyl acidic amino acid salts, N-acyl neutral amino acid salts and the like are known, but N-acylated oxyamino acids such as serine and threonine have hardly been studied as surfactants.

JP-A-55-90594 discloses a detergent composition containing a mixture of N-acyl amino acid salts, and it is described that the N-acyloxy amino acid salt has a protective effect on the skin and hair. Has been done. Also,
JP-A-56-115400 discloses a detergent composition containing an N-long chain acyl mixed amino acid salt containing an N-acyloxy amino acid salt as a foam enhancer. However, although the cleaning agents described in these publications are excellent in foaming, squeaky feeling during rinsing, and smoothness after use, they are not sufficient in retaining foam, and N-
When the acyloxy amino acid salt was used alone, there was a problem that the foam quality was also rough.

[0004]

DISCLOSURE OF THE INVENTION It is an object of the present invention to provide a detergent composition containing N-acyloxyamino acid salt having improved foam retention and foam quality, which has hitherto been insufficient. The purpose is to utilize a surfactant.

[0005]

[Means for Solving the Problems] As a result of intensive studies in view of such circumstances, the present inventors have found that the N-acyloxyamino acid salt and the higher fatty acid salt are used in combination at a specific ratio.
The inventors have found that the above objects can be achieved and completed the present invention.

That is, the present invention provides (A) an N-acyl serine salt or N-acyl threonine salt in which an acyl group is a fatty acid residue having 8 to 22 carbon atoms, and (B) a higher alkyl group having 8 to 22 carbon atoms. Fatty acid salt (A) / (B) = 99.5
/0.5-70/30 by weight ratio, It is a detergent composition characterized by the above-mentioned.

The present invention will be described in detail below. Examples of the component (A) of the present invention include N-lauroylserine, N-cocoylserine, N-myristoylserine, N-palmitoylserine, N-stearoylserine, N-oleoylserine, N-lauroylthreonine, N-cocoylthreonine. , N-myristoyl threonine, N-palmitoyl threonine, N-stearoyl threonine, N-oleoyl threonine and the like can be exemplified, and these N-acyl amino acids may be optically active or racemic. As the base component, alkali metals such as sodium and potassium, monoethanolamine, diethanolamine, triethanolamine, 2-amino-2-
Examples thereof include organic amines such as methyl-1-propanol and 2-amino-2-methyl-1,3-propanediol, and basic amino acids such as lysine, ornithine and arginine. You may use these base components in combination of 2 or more types.

The higher fatty acid of the higher fatty acid salt as the component (B) is a straight or branched chain saturated or unsaturated one having 8 to 22 carbon atoms, such as lauric acid, myristic acid, palmitic acid, Stearic acid, coconut oil fatty acid,
Examples include hardened tallow fatty acid and oleic acid. The base component can be selected from the group of base components of the above component (A).

Any one of the above components (A) and (B) may be used alone, or two or more of them may be used in combination.

Component (A) in the detergent composition of the present invention
The mixing ratio of the component (B) and the component (B) was 99.5 / 0.
5 to 70/30, preferably 99/1 to 80/2
It is 0. When the content ratio of the component (B) is less than 0.5,
The amount of foam is sufficient, but the retention of foam is poor and the quality of the foam is rough. On the other hand, when it exceeds 30, although the retention of bubbles is improved,
A squeaky sensation occurs, hard water resistance deteriorates, and irritation to the skin and mucous membranes increases.

Component (A) in the detergent composition of the present invention
And the total content of the component (B) is 5% by weight or more, preferably 10 to 80% by weight.

The dosage form of the cleaning composition of the present invention as a cleaning agent is not particularly limited, and may be any dosage form such as liquid, paste, gel, solid and powder.

The detergent composition of the present invention contains one or more mineral oil-based or higher alcohol-based synthetic surfactants such as alkylbenzene sulfonate, alkyl sulfonate, alkyl sulfate, and polyoxyethylene alkyl ether sulfate. By blending it, it is possible to further reduce irritation and improve usability.

Further, anionic surfactants, cationic surfactants, amphoteric surfactants, and nonionic surfactants other than those mentioned above can be added within a range that does not impair the effects of the present invention. If necessary, agents such as a texture-improving agent, a superfatting agent, a crude drug, a viscosity adjusting agent, a pH adjusting agent, a fragrance, and a dye can be used.

[0015]

EXAMPLES Next, the present invention will be described in more detail by way of examples.

Example 1 Evaluation of retention of foam N-lauroyl threonine was synthesized by a known Schotten-Baumann method, recrystallized to obtain high-purity N-lauroyl threonine, and N-lauroyl threonine was neutralized with potassium hydroxide.
-Lauroyl threonine potassium salt was obtained.

The N-lauroyl threonine potassium salt and the laurate potassium salt were used in various proportions so that the total concentration of both was 0.5% by weight. About 50 g of each aqueous solution was taken and stirred with a mixer to measure the foam retention rate. Here, retention rate = (10
(Foam amount after minute (ml)) / (foam amount after 1 minute (ml)) × 100. The results are shown in Table 1.

[0018]

[Table 1]

Example 2 Body shampoos having the formulations shown in Table 2 were prepared, and a sensory evaluation was conducted for each. The sensory evaluation was carried out by comparison with a standard prescription by panelists of 5 males and 5 females. Scores were given by the evaluation points in 5 grades (+2 to -2) with the standard prescription as 0, and the average points were shown.

[0020]

[Table 2]

Example 3 Solid soap After thoroughly kneading the following composition, it was extruded with a small soap prototype device with the die kept at 40 to 50 ° C., and the obtained bar-like detergent was molded to obtain a solid detergent. The product was mild to the skin, exhibited excellent foaming and retention, and was not taut after washing.

[0022]

[Table 3]

Example 4 Shampoo The following formulation was dissolved by heating at 70 to 80 ° C. and then cooled to room temperature to obtain a shampoo. This product had good foaming, foam retention and foam feel.

[0024]

[Table 4]

[0025]

The cleaning composition of the present invention has excellent foam retention during cleaning, has a creamy foam quality, does not feel slimy during rinsing, has no squeaky feeling, and is excellent in usability. is there. In addition, it has become possible to use N-acyloxyamino acid salts, which have not been used sufficiently as surfactants.

Claims (1)

[Claims] 1. An N-acyl serine salt or N-acyl threonine salt in which (A) an acyl group is a fatty acid residue having 8 to 22 carbon atoms, and (B) a higher fatty acid salt having 8 to 22 carbon atoms ( A) / (B) = 99.5 / 0.5 to 70/3
A cleaning composition comprising 0 in a weight ratio.