JP2002129187A - N-long chain acylamino acid and detergent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the powder-standing property (scatterability) of a detergent comprising an N-long chain acylamino acid and/or its salt and improve its dispersibility and solubility and to improve the powder-standing property, dispersibility and solubility of a detergent composition using its salt as its raw material. SOLUTION: An N-long chain acylamino acid and/or its salt containing a water content of 3.5-10 wt.%, especially the sodium or potassium salt of N- lauroylgultamic acid, is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an N-long chain acylamino acid and / or a salt thereof, and a detergent comprising the same.

[0002]

2. Description of the Related Art N-long-chain acylamino acids and salts thereof are
"Amisoft" as an amino acid-based anionic surfactant
Some products are marketed under the trademark (Registered Trademark)
The N-long chain acyl group in these compounds includes an acyl group derived from coconut oil fatty acid, lauric acid, myristic acid, stearic acid, a mixed fatty acid of hydrogenated tallow and coconut oil, and the like. -Including glutamic acid,
Salts include alkali metal salts such as sodium and potassium, organic amine salts such as monoethanolamine salt,
And basic amino acid salts. In addition, "Amisoft", whose amino acid is an acidic amino acid, has the same weak acidity as the skin and is highly safe against the skin with extremely low irritation, and is used in cosmetics such as soaps and shampoos, as well as industrial products such as silk and wool fabric. It is already known that it is used in detergents.

[0003] Incidentally, N-long chain acyl amino acids and / or
Or powders of the salts thereof, particularly sodium and potassium salts of N-lauroylglutamic acid, are produced, for example, by spray-drying the solution, and are often used as raw materials such as face washing powders and powder detergents such as bath salts. However, these salts have large dust (Konadachi) when preparing powder detergents, and also have large dust and dispersibility in water when these powder detergents are actually used. And the solubility in water is not always good.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an N-long-chain acylamino acid and / or a salt thereof having reduced dusting property and improved dispersibility and solubility.

[0005]

Means for Solving the Problems The present inventors have conducted intensive studies in order to solve the above-mentioned problems, and as a result, found that N-long-chain acylamino acids and / or salts thereof have poor dustability, poor dispersibility and poor solubility. Is attributed to excessive drying. Therefore, if the water content of N-long-chain acylamino acids and / or salts thereof is adjusted, the above-mentioned preparation and use of the powder detergent containing such powder as a main component can be performed. The present inventors have found that the problems at the time are solved, and completed the present invention based on such knowledge.

That is, the present invention provides a water content of 3.5 to 3.5.
10% by weight of N-long-chain acylamino acids and / or their salts, especially the sodium and potassium salts of N-lauroylglutamic acid. The present invention also relates to a detergent comprising the N-long-chain acylamino acid and / or a salt thereof.

Hereinafter, the present invention will be described sequentially.

[0008] Excessive drying has resulted in an excessively low water content, a high dustability and poor dispersibility and solubility. For example, the water content of a commercially available powder of sodium salt of N-lauroyl-L-glutamic acid is as follows: Usually it is just over 1% by weight,
There is no particular difficulty in adjusting the water content to 3.5 to 10% by weight (humidity control step). For example, the purpose is achieved only by spreading the powder to be humidified flat and exposing it to high humidity outside air. For more efficient operation, forced humidification using a humidifier or the like can be used. As the water content increases, the state of the powder becomes smooth and the friability decreases, but when the water content exceeds about 10% by weight, N
Powders of the sodium salt of lauroylglutamic acid lose powder properties and are not preferred.

Powdering properties of powders of N-long-chain acylamino acids and / or salts thereof, especially powders of sodium and potassium salts of N-lauroylglutamic acid, during the production of powder detergent compositions containing these as raw materials sex)
Can be determined by visual inspection, for example, but it can be measured more accurately by, for example, a scattering test using a powder tester.

The powderiness of the powder detergent composition during actual use can of course be determined by visual observation.
For example, a sensory test using a trained panel can be performed.

When the powder detergent composition is actually used for face washing or the like, the powder detergent composition is dissolved in water (cold water or hot water) in advance. You can easily test by taking water on your palm and adding a powder of detergent to it.
More accurate measurement can be made by measuring the dissolution rate in water (dissolution time). By the way, N-
Excessively dry powders of sodium and potassium lauroylglutamic acids, when added to water to dissolve them in water, form so-called lumps and have poor dispersibility in water, and as a result Poor.

[0012] The composition of the powder detergent composition is such that an N-long-chain acylamino acid and / or a salt thereof having a predetermined water content, especially
-There is no particular limitation except that lauroylglutamic acid sodium salt and / or potassium salt is used as a raw material. Raw materials such as face wash powder and shampoo which are usually used as a powder detergent, and raw materials for bathing agents such as bitter water etc. are used. Needless to say, it can be used as desired.

[0013]

The present invention will be further described below with reference to examples.

Example 1 (Water content and handling physical properties) Four kinds of commercially available sodium and potassium N-lauroyl-L-glutamate samples were collected, the water content of these samples was adjusted, and the water content and dustability ( (Dispersibility), dispersibility and solubility were examined. Table 1 shows the results
(A) to (d).

[0015]

[Table 1]

In this test, the water content was measured by the Karl Fischer method, the dustability (scattering property) was measured by a scattering test using a powder tester, and the solubility in water was determined by the dissolution time in water (1 0.5 g /
(100 ml water), and the dispersibility in water was observed by taking a powder (about 1 g) on a palm and adding a small amount of water.

The dissolution rate can be evaluated as good within a dissolution time of 300 seconds or less, the dispersibility can be evaluated as good at 70 or more, and the dispersibility can be evaluated with a palm. A small amount of lumps can be evaluated as acceptable (△), and a large amount of lumps can be evaluated as poor (×).

Example 2 (detergent composition) The ingredients shown in the following Tables 2 to 5 were kneaded well with a powder mixer to prepare facial cleansing powder, powder toothpaste, kitchen cleanser and bath detergent. Prepared. In each table, the composition ratios are shown in parts by weight.

[0019]

[Table 2]

[0020]

[Table 3]

[0021]

[Table 4]

[0022]

[Table 5]

These products were excellent in physical properties at the time of manufacture (at the time of preparation) and at the time of use.

[0024]

According to the present invention, an N-long-chain acylamino acid and / or a salt thereof, particularly a sodium N-lauroylglutamate, having excellent handling properties (dustability (dispersibility), dispersibility and solubility) according to the present invention. Salt and potassium salt can be easily provided,
As a result, a detergent composition using sodium and potassium N-lauroylglutamate having such excellent properties as a raw material can be easily provided.

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Claims (7)

[Claims] 1. N having a water content of 3.5 to 10% by weight
-Long-chain acylamino acids and / or salts thereof. 2. An acyl group of an N-long-chain acylamino acid,
Palm oil fatty acid, lauric acid, myristic acid, stearic acid, and an acyl group derived from at least one selected from the group consisting of mixed fatty acids of hardened tallow and coconut oil,
The N-long-chain acylamino acid according to claim 1 and / or a salt thereof. 3. The N-long-chain acyl amino acid and / or a salt thereof according to claim 1, wherein the amino acid of the N-long-chain acyl amino acid is an acidic amino acid. 4. The N-long-chain acylamino acid and / or salt thereof according to claim 1, wherein the N-long-chain acylamino acid is N-lauroylglutamic acid. 5. The N according to claim 1, which is in the form of a powder.
-Long-chain acylamino acids and / or salts thereof. 6. The N-long-chain acylamino acid and / or a salt thereof according to claim 1, wherein the salt is a sodium salt and / or a potassium salt. 7. A detergent comprising the N-long-chain acylamino acid according to claim 1 and / or a salt thereof.