JP3376691B2 - Detergent composition - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a detergent composition,
More specifically, it relates to a detergent composition having excellent detergency, less irritation to the skin and hair, and improved foamability, foam retention, foam quality and usability.

[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. However, the detergents containing these surfactants as the main components are excellent in detergency, but the squeaky feeling at the time of washing, the feeling of tightness after use, and the like are not sufficiently satisfactory, and further the skin and It has a problem of strong irritation to hair.

N-Long-chain acyl acidic amino acid salts and N-long-chain acyl neutral amino acid salts are known as surfactants which are less irritating to the skin and hair and have excellent detergency. A number of studies have been reported on the addition and blending of the above-mentioned detergent composition with the above-mentioned detergent composition (for example, "functional cosmetics" (published by CMC, page 275, 1990), Japanese Patent Laid-Open No. Hei 5).
No. 156281). In addition, Japanese Patent Publication Sho 39-2944
No. 4 discloses a mild detergent composition containing 1 to 50% by weight of an N-long-chain acyl threonine salt and an N-long-chain acylalanine salt with respect to a mineral oil type or alcohol-based synthetic detergent. However, there are problems in terms of usability such as foaming, squeaking during cleaning, and feeling after washing.

[0004]

DISCLOSURE OF THE INVENTION The object of the present invention is to have excellent detergency, less irritation to skin and hair, excellent foaming property, and improved foam retention, foam quality and feeling of use. -Providing a detergent composition containing a long-chain acyl neutral amino acid salt is intended to utilize an N-long-chain acyl neutral amino acid salt, which has hitherto been insufficient.

[0005]

As a result of intensive studies to achieve the above object, the present inventor has found that a specific N-long chain acyl neutral amino acid salt and an imidazoline-type amphoteric surfactant have a specific ratio. It was found that the above object can be achieved by the combined use of the above method and the present invention has been completed.

That is, in the present invention, the weight ratio (A) / (B) = 99.5 / 0.5 of the following components (A) and (B) is used.
It is related with the detergent composition characterized by containing in the ratio of -40/60. (A) N-long-chain acylalanine or a salt thereof or N
Long-chain acyl threonine or a salt thereof (B) an imidazoline-type amphoteric surfactant represented by the following general formula (I)

[Chemical 2] (In the formula, R ¹ is an alkyl group having 8 to 22 carbon atoms or — (CH ₂ ) _n NHCOR ² (wherein, R ² is an alkyl group having 7 to 21 carbon atoms, and n is 1 to 5). Represents the respective integers).

The present invention will be described in detail below. In the component (A) of the detergent composition of the present invention, the long-chain acyl group represents an acyl group derived from a saturated or unsaturated fatty acid having 8 to 22 carbon atoms, and examples thereof include lauric acid, myristic acid and palmitic acid. Acyl groups derived from fatty acids of a single composition such as stearic acid and oleic acid can be mentioned. In addition to these, coconut oil fatty acid, beef tallow fatty acid, hardened beef tallow fatty acid, castor oil fatty acid, olive oil fatty acid, palm oil fatty acid and the like can be obtained from nature. The acyl group may be a mixed fatty acid or a fatty acid (including a branched fatty acid) obtained by synthesis.
Preferred specific examples include N-lauroyl threonine,
N-myristoyl threonine, N-palmitoyl threonine, N-stearoyl threonine, N-oleoyl threonine, N-cocoyl threonine, N-lauroyl alanine, N-myristoyl alanine, N-palmitoyl alanine, N-stearoyl alanine, N-oleoyl Examples thereof include alanine and N-cocoyl alanine. These N-acyl amino acid salts may be either optically active compounds or racemic compounds. As salt, sodium,
Alkali metal salts such as potassium, alkaline earth metal salts such as magnesium and calcium, inorganic base salts such as ammonia, monoethanolamine, diethanolamine, triethanolamine, 2-amino-2-methyl-1-propanol, 2-amino. Examples thereof include 2-methyl-1,3-propanediol and the like, and organic base salts such as lysine, ornithine, and arginine. You may use these base components in combination of 2 or more types.

In the component (B) of the detergent composition of the present invention, a preferred specific example of the imidazoline type amphoteric surfactant represented by the general formula (I) is 2-lauryl-N.
-Carboxymethyl-N-hydroxyethyl imidazolium betaine, 2-myristyl-N-carboxymethyl-N-hydroxyethyl imidazolium betaine, 2-
Palmityl-N-carboxymethyl-N-hydroxyethyl imidazolium betaine, 2-stearyl-N-carboxymethyl-N-hydroxyethyl imidazolium betaine, 2-coconut oil alkyl-N-carboxymethyl-N-hydroxyethyl imidazolium betaine Etc. can be mentioned.

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
And the component (B) are mixed in a weight ratio of 99.5 / 0.
It is 5-40 / 60, preferably 90 / 10-80 / 20. When the content ratio of the component (B) is less than 0.5, the irritation to hair and skin and the detergency are excellent, but the squeaky feeling at the time of washing is remarkable, and the smoothness is lost, and the like I also feel bad. On the other hand, when it exceeds 60, sliminess is generated during and after washing, the usability is deteriorated, and there is a problem in irritation to hair and skin.

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 90% by weight.

By incorporating a higher fatty acid salt as the component (C) into the detergent composition of the present invention, the detergent composition is further excellent in foaming property and has good foam retention, foam quality and feeling of use. A composition is obtained. Here, the higher fatty acid of the higher fatty acid salt (C) is a linear or branched saturated or unsaturated one having 8 to 22 carbon atoms, and preferred specific examples thereof include lauric acid, myristic acid, and palmitic acid. , Stearic acid, coconut oil fatty acid, hardened beef tallow fatty acid, oleic acid and the like. Examples of the salt include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as magnesium and calcium, inorganic base salts such as ammonia, monoethanolamine and diethanolamine,
Triethanolamine, 2-amino-2-methyl-1-
Examples thereof include propanol, 2-amino-2-methyl-1,3-propanediol and the like, and organic base salts such as lysine, ornithine and arginine. You may use these salts in combination of 2 or more types. These may be blended as a fatty acid salt, or a fatty acid and a base may be blended separately to form a fatty acid salt in the composition. The content of the component (C) in the detergent composition of the present invention is (A) / (C) = 9 by weight ratio.
9.5 / 0.5 to 0.5 / 99.5, especially 99/1 to 5
0/50 is preferable.

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. Also,
The detergent composition of the present invention is suitable as a detergent for skin and hair, and can be used as a hair shampoo, a hair conditioner, a rinse, a hair mousse, a face cleansing foam, a body shampoo, a soap and the like.

The detergent composition of the present invention includes, for example, one or more mineral oil type or higher alcohol synthetic surfactants such as alkylbenzene sulfonate, alkyl sulfonate, alkyl sulfate, polyoxyethylene alkyl ether sulfate and the like. It is also possible to further reduce the irritation and improve the feeling of use by blending the component (A) in an amount equal to or less than the component (A).

Further, a surfactant other than the above may be added to the detergent composition of the present invention within a range that does not impair the effects of the present invention. As surfactants other than the above, N-acyl glutamate, N-acyl-N-methyl taurine salt, N-acyl isethionate, N-acyl glycine salt, ether carboxylate, polyoxyethylene alkyl ether sulfate, Anion interface of polyoxyethylene alkyl ether acetate, alkyl sulfate ester salt, α-sulfo fatty acid ester salt, alkyl sulfonate, sulfosuccinate, alkylbenzene sulfonate, α-olefin sulfonate, monoalkyl phosphate, etc. Cationic surfactants such as activators, imidazolinium salts, monoalkyl quaternary ammonium salts, dialkyl quaternary ammonium salts, alkyl esters of N-long chain acyl basic amino acids or salts thereof, polyoxyethylene alkyl ethers, Alkyl dimethylamine oxy And nonionic surfactants such as fatty acid alkanolamides and alkyl glycosides, and amphoteric surfactants such as carbobetaine, amidobetaine and sulfobetaine.

Further, other commonly used ingredients in the detergent composition can be added to the detergent composition of the present invention within a range that does not impair the effects of the present invention. Other commonly used ingredients in detergent compositions include moisturizers such as ethylene glycol, propylene glycol, 1,3-butylene glycol, glycerin, sorbitol, glyceryl monostearate, sorbitan monopalmitate, polyoxyethylene cetyl ether, poly. Emulsifiers such as oxyethylene stearate, polyoxyethylene sorbitan monolaurate, diglycerin monostearate, liquid paraffin, petrolatum, solid paraffin, squalane, hydrocarbons such as olefin oligomers, higher alcohols such as stearyl alcohol, isopropyl milli State, isopropyl palmitate, stearyl stearate, octyldodecyl myristate, octyldodecyl oleate, triglycerate 2-ethylhexanoate Ester such as deodorant, texture improver, superfatting agent, drug such as crude drug, cellulose derivative such as methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, cationized cellulose, natural polymer, polyoxyethylene glycol distearate ester, ethanol, carboxy Viscosity modifiers such as vinyl polymers, antiseptic and antifungal agents such as paraben derivatives, pearlizing agents, anti-inflammatory agents, ultraviolet absorbers, p
Examples include H regulators, fragrances, and dyes.

[0017]

EXAMPLES The present invention will now be described in more detail with reference to examples, but the present invention is not limited to these examples. In this example, the blending amount was expressed in% by weight.

Production Example N-lauroyl threonine was prepared according to, for example, JP-B-51-38.
No. 681, etc., the known Schotten-Baumann method was used for synthesis, and recrystallization was performed to obtain high-purity N-lauroyl threonine, which was neutralized with potassium hydroxide to obtain N-lauroyl threonine potassium salt. It was In the same manner, various N-long chain acyl neutral amino acid salts were obtained.

Examples 1 to 8 and Comparative Examples 1 to 6 N-long-chain acyl neutral amino acid salt, imidazoline-type amphoteric surfactant, and higher fatty acid salt were mixed at various ratios shown in Table 3 to prepare a surfactant. The total concentration was adjusted to 0.5% by weight. For each aqueous solution, 50 g thereof was stirred with a mixer, and the volume of the foam after 1 minute and 10 minutes was measured to evaluate the foam amount, the foaming speed, and the foam retention. Table 1 shows the evaluation criteria of each evaluation item.

[0020]

[Table 1]

Further, as a hair and body cleansing agent, the feel of the foam, the smoothness and the slimy feeling were evaluated by the sensory evaluation of 10 panelists each of men and women. Table 2 shows the evaluation criteria of each evaluation item. In the sensory evaluation, N-long-chain acyl neutral amino acid salt, imidazoline-type amphoteric surfactant, and higher fatty acid salt were mixed in various ratios shown in Table 3 so that the total concentration of the surfactant would be 15% by weight. Adjusted to.

[0022]

[Table 2]

The evaluation results are shown in Table 3. As a result, this product is mild to the skin and has a good feeling of foam,
The feeling after washing was also sufficiently satisfactory.

[0024]

[Table 3]

Example 9 Shampoo (1) 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, retention of foam, and feeling of foam, and the feeling of washing up was also sufficiently satisfactory.

[0026]

[Table 4]

Example 10 Shampoo (2) 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, retention of foam, and feeling of foam, and the feeling of washing up was also sufficiently satisfactory.

[0028]

[Table 5]

[0029]

The cleaning composition of the present invention is less irritating to the skin and hair during cleaning, has excellent retention of bubbles, does not feel slimy during rinsing, has a smooth feel, and is easy to use. It is excellent. Further, it has become possible to use an N-long chain acyl neutral amino acid salt that has not been sufficiently used as a surfactant.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI C11D 1/90 C11D 1/90 (56) References JP-A-5-156282 (JP, A) JP-A-60-132912 (JP , A) JP-A-4-211607 (JP, A) JP-A-1-294799 (JP, A) JP-A-59-230099 (JP, A) JP-A-5-17342 (JP, A) JP-A-5-29342 (JP, A) 55-90594 (JP, A) JP-A-56-115400 (JP, A) JP-A 1-144496 (JP, A) JP-B 39-29444 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) C11D 1/00-17/08 A61K 7/075 A61K 7/50

Claims (2)

(57) [Claims] 1. A cleaning composition comprising the following components (A) and (B) in a weight ratio (A) / (B) = 99.5 / 0.5 to 40/60. object. (A) N-long-chain acylalanine or a salt thereof or N
Long-chain acyl threonine or a salt thereof (B) an imidazoline-type amphoteric surfactant represented by the following general formula (I): (In the formula, R ¹ is an alkyl group having 8 to 22 carbon atoms or — (CH ₂ ) _n NHCOR ² (wherein, R ² is an alkyl group having 7 to 21 carbon atoms, and n is 1 to 5). Represents the respective integers). 2. In addition to the component (A) and the component (B),
The cleaning composition according to claim 1, which comprises (C) a higher fatty acid salt having 8 to 22 carbon atoms.