JP2001114653A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a detergent composition low irritant to skin, having good foaming without causing squeaking during rinsing. SOLUTION: This detergent composition comprises (A) an N-acylamino acid or its salt and (B) a glyceryl ether having a 4-12C alkyl group or a 4-12C alkenyl group.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition which is mild to the skin, has good lather, and does not irritate during rinsing.

[0002]

2. Description of the Related Art Detergent compositions which come into direct contact with the skin, such as shampoos and whole body cleansing agents, are required to have low irritation to the skin in addition to detergency, foam performance and feeling of use. Sulfate surfactants, which are widely used as cleaning ingredients, have high foaming performance, but may be noticeable during shampooing, and if used for a long period of time, people with sensitive skin may easily roughen their hands and skin. In addition, if the detergency is high, the shampoo has a problem that the hair is squeezed at the time of rinsing and the usability is deteriorated. When a conditioning component such as a cationic polymer or a silicone compound is added to improve the rinsing property, the foaming property is reduced. Further, in order to suppress irritation, detergent compositions containing ether-type acetic acid-based surfactants, phosphate-based surfactants, acylated amino acid-based surfactants, etc. as main components have been developed. And foaming properties were not satisfactory.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a detergent composition which is less irritating to the skin, has good foaming, and does not irritate during rinsing.

[0004]

Means for Solving the Problems The present inventors have found that when an acylated amino acid-based surfactant is used in combination with a specific glyceryl ether, the skin is less irritating, has good lathering, and has a good rinsing property. It has been found that a detergent composition that does not squeak can be obtained.

The present invention provides a detergent composition comprising (A) an N-acyl amino acid or a salt thereof, and (B) a glyceryl ether having an alkyl or alkenyl group having 4 to 12 carbon atoms. .

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The N-component of component (A) used in the present invention
Examples of the amino acid residue in the acyl amino acid include glutamic acid, aspartic acid, alanine, glycine and the like. As the acyl group, those having 8 to 18 carbon atoms are preferable. For example, a caprinoyl group, a lauroyl group,
And a myristoyl group and a palmitoyl group. Further, the amide nitrogen of the N-acylamino acid may be substituted with a lower alkyl group. The lower alkyl group preferably has 1 to 3 carbon atoms, and examples thereof include a methyl group, an ethyl group, an n-propyl group, and an isopropyl group.
Furthermore, examples of these salts include alkyl metal salts such as sodium and potassium; alkanolamine salts such as triethanolamine; and basic amino acid salts such as arginine.

Preferred examples of the component (A) include N
N-cocoylglycine, N-
Acyl-N-carboxyethylglycine, N-lauroylglutamic acid, N-myristoylglutamic acid, N-
Cocoylglutamic acid, N-lauroyl-β-alanine, N-lauroyl-N-isopropylglycine, N-
Lauroyl sarcosine, N-myristoyl sarcosine,
N-palmitoyl sarcosine, N-lauroyl-N-methyl-β-alanine and the like, and further, alkali metal salts, alkanolamine salts, and basic amino acid salts thereof.

One or more types of component (A) can be used, and 2 to 70% by weight, especially 5 to 50% by weight,
Further, it is preferable to mix 10 to 30% by weight from the viewpoint of foamability.

The glyceryl ether of the component (B) has a linear or branched alkyl or alkenyl group having 4 to 12 carbon atoms, and is, for example, n-butyl, isobutyl, tert-butyl, n-butyl. A carbon number of 4-1 such as a pentyl group, isopentyl group, n-hexyl group, isohexyl group, n-heptyl group, n-octyl group, 2-ethylhexyl group, n-nonyl group, n-decyl group, n-lauryl group;
Those having 2 alkyl groups are preferred, and especially those having 4 carbon atoms
It is preferable to have one or two, particularly one alkyl group having from 11 to 11, more preferably from 6 to 10 carbon atoms, especially 8 carbon atoms.

One or more glyceryl ethers of the component (B) can be used, and 0.1 to 30% by weight, particularly 0.5 to 15% by weight, and more preferably 1 to 5% by weight in the whole composition. Is preferred in terms of foaming properties.

The detergent composition of the present invention is preferably in the form of an aqueous liquid using water as a medium. Further, components used in ordinary detergent compositions such as propylene glycol, glycerin, diethylene glycol monoethyl ether, sorbitol, Humectants such as panthenol; conditioning components such as cationic polymers, silicone compounds and derivatives thereof; pearling agents such as ethylene glycol distearate; nonionic surfactants such as polyoxyethylene alkyl ether and alkyl polyglucoside; amides Amphoteric surfactants such as propyl betaine; anionic surfactants other than component (A); cationic surfactants such as cetyltrimethylammonium salt; coloring agents such as dyes and pigments; methylcellulose, polyethylene glycol, ethanol and the like Viscosity adjusters; pH adjusters such as citric acid and potassium hydroxide; salts such as sodium chloride, plant extracts, preservatives, bactericides, chelating agents, vitamins, anti-inflammatory agents, anti-dandruff agents, flavors, pigments, An ultraviolet absorber, an antioxidant, water and the like can be appropriately compounded.

The detergent composition of the present invention can be produced according to a conventional method, and can be used as a body detergent such as a shampoo, a whole body cleanser, a face wash, and a hand detergent. The detergent composition of the present invention is preferably weakly acidic because of less irritation, and is preferably pH 5 to 10, particularly preferably pH 5.5 to 7.

[0013]

The cleaning composition of the present invention has low irritation to the skin, has good lather, and does not irritate during rinsing.

[0014]

EXAMPLES Example 1 A cleaning composition having the composition shown in Table 1 was produced by a conventional method, and evaluated for foaming power, irritation and squeaky feeling upon rinsing. The results are shown in Table 1.

(Evaluation method) (1) Foaming power: A 20-fold diluted aqueous solution of the detergent composition is prepared, and 100 mL of this solution (liquid temperature of 40 ° C.) is poured into a 1000 mL measuring cylinder. Next, four stirring blades having a diameter of 5 cm were installed in the solution, and the stirring blade was operated at 1000 r / min for 30 minutes.
After stirring for 2 seconds, the volume (mL) of the foam generated was measured to determine the foaming amount, and evaluated based on the following criteria. The stirring blade is 5
Inverted every second. A: Foaming amount 200 mL or more. ；: Foaming amount of 150 mL or more and less than 200 mL. Δ: Foaming amount less than 150 mL.

(2) Irritation: A 5-fold diluted aqueous solution of each detergent composition was prepared, and 10 mL of this aqueous solution was placed in a 3.5 cm-diameter glass cup placed on the forearm of 10 specialized panelists, and 30 days a day. Minute contact with skin. After performing this for three consecutive days, the condition of the skin was evaluated according to the following criteria. ○: Dropping is recognized by 5 or less. Δ: Dropping is observed in 6 or more persons, but erythema is not observed. ×: Dropping and erythema are observed in 6 or more persons.

(3) Feeling of squeaking during rinsing: When the upper arm is washed with the palm of a hand using 2 g of each detergent composition and an appropriate amount of tap water by 10 expert panelists, and rinsed with tap water for 1 minute. The feeling of creaking was sensory evaluated according to the following criteria. The average point was determined, and an average of 1.5 or more was indicated by ○, a value of 0.5 or more and less than 1.5 was indicated by Δ, and a value of less than 0.5 was indicated by ×. 2; 1: There is a slight squeaky feeling. 0: The texture is strong and unpleasant.

[0018]

[Table 1]

Example 2 A shampoo having the following composition was produced by a conventional method. The resulting shampoo was less irritating to the skin, had good foaming, and did not irritate during rinsing.

(Table 2) (Components) (% by weight) Sodium N-lauroylglutamate 18 n-Octylglyceryl ether 5 Ethanol 1 Sodium benzoate 0.3 Fragrance 0.5 Citric acid aqueous solution (adjusted to pH 6.5) Appropriate amount Purified water Balance

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tetsuya Miyajima 1334 Minato 1334, Wakayama-shi, Wakayama Prefecture Kao Corporation Research Institute (72) Inventor Kenichi Kasuga 2-1-3 Bunka, Sumida-ku, Tokyo Kao Corporation Research Institute F term (reference) 4C083 AB052 AC102 AC172 AC302 AC312 AC661 AC662 CC23 CC38 DD27 EE06 EE07 EE10

Claims (1)

[Claims] (A) an N-acyl amino acid or a salt thereof,
And (B) a detergent composition containing a glyceryl ether having an alkyl group or an alkenyl group having 4 to 12 carbon atoms.