JPH0987663A - Detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cleansing agent composition having extremely excellent frothing property, giving low stimulation to the skin and hair and exhibiting good feeling in use and after cleaning. SOLUTION: This composition contains (A) a secondary amide-type N- acyltauric acid of the formula R<1> CONHCH2 CH2 SO3 M (R<1> CO is a 10-16C straight- chain acyl; M is sodium, potassium or an alkanolammonium), (B) 0.1-10wt.% of an amine oxide of the formula (R<2> is a 10-20C alkyl or an alkenyl; R<3> and R<4> are each a 1-3C alkyl) and, as necessary, (C) a higher fatty acid. The weight ratio of A/B is 100/1 to 2/1 (especially 50/1 to 5/1) and the total amount of the components A and B is preferably 5-50wt.% for a liquid, 15-70wt.% for a paste and 40-95wt.% for a solid composition. The weight ratio of C/(A+B) is preferably 1/20 to 1/2 (especially 1/10 to 1/3).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition, and more particularly to a detergent composition having excellent foamability, low irritation to skin and hair, and good feeling after washing. Regarding

[0002]

2. Description of the Related Art A personal cleansing composition generally contains an anionic surfactant as a main component and is used for cleansing the skin with soap,
That is, higher fatty acid salts are mainly used, and for hair, alkyl sulfates and sulfonates are mainly used.

Soaps used for cleaning the skin have the drawback of producing squeaks and tightness, and the alkylsulfates and sulfonates used for cleaning the hair are cleansed without the squeaks and tensions of soaps. It has excellent power, but it had a problem in terms of irritation. Therefore, it has been studied to use a specific N-acylated amino acid type surfactant as a main base of a detergent as a surfactant having excellent feeling of use and low irritation. I was not completely satisfied. Further, as a modification of these drawbacks, a method disclosed in Japanese Patent Application Laid-Open No. 5-156283
A detergent composition containing a primary amide type N-acyl amino acid salt and an amine oxide is disclosed. However, it was not yet satisfactory in terms of foaming and usability.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a detergent composition which is excellent in foaming, has low irritation, and has a good feeling in use.

[0005]

Under these circumstances, the inventors of the present invention have made earnest studies, and as a result, by combining a specific secondary amide type N-acyl taurine compound and amine oxide in combination, the above-mentioned object is obtained. The inventors have found that the above is achieved, and arrived at the present invention.

That is, the present invention provides the following components (A) and (B) (A) a secondary amide type N-acyl taurine salt represented by the following general formula (1).

Embedded image R ¹ CONHCH ₂ CH ₂ SO ₃ M (1) (In the formula, R ¹ CO represents a linear acyl group having 10 to 16 carbon atoms, and M represents sodium, potassium, or alkanol ammonium.) B) A detergent composition comprising an amine oxide.

The secondary amide type N-acyl taurine salt of the component (A) used in the present invention has the property of reacting with calcium contained in tap water to form highly lubricious plate crystals. It shows the effect of imparting a good feeling of use such as slippage after washing to a detergent composition containing the above. Here, the lubricity of the plate-like crystals formed by the reaction of the secondary amide type N-acyl taurine salt and calcium is, for example, the plate on a dried pig skin (Aroask, manufactured by Antibody Chemical Industries) regenerated with physiological saline. It is determined by measuring the coefficient of static friction of crystalline crystals, and those having a coefficient lower than that of the blank from the time of containing water to the time of drying are evaluated as good.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In the above secondary amide type N-acyl taurine salt, R1CO in the general formula (1) is used.
Is a linear acyl group having 10 to 16 carbon atoms, particularly 12 to
14 is desirable, and specifically, a caprinoyl group, a lauroyl group or a myristoyl group is preferable. When the carbon number is more than 16, it is not preferable because the lubricity of the plate-like crystals to be formed is lowered, and when the carbon number is less than 10, foaming is lowered, which is not preferable. In addition, it is very important that the secondary amide type N-acyl taurine salt has a secondary amide type structure in which the N-acyl group is composed of the linear acyl group. That is, when the acyl group forming the N-acyl group is branched or the amide structure is a tertiary amide type, the production of plate crystals is suppressed, and the physical properties of the produced crystals are poor in lubricity. However, since it is often sticky, it is difficult to obtain a favorable feeling.

Examples of the amine oxide as the component (B) used in the present invention include those represented by the following general formula (2).

[0010]

Embedded image

(In the formula, R ² represents an alkyl or alkenyl group having 10 to 20 carbon atoms, and R ³ and R ⁴ each represent an alkyl group having 1 to 3 carbon atoms.

Specific examples of such amine oxides include lauryldimethylamine oxide, myristyldimethylamine oxide, palmityldimethylamine oxide, stearyldimethylamine oxide and the like.

Further, as the amine oxide as the component (B), cocoamidopropylamine oxide represented by the following general formula (3) can also be used.

[0014]

Embedded image

(In the formula, R ⁵ CO represents an acyl group derived from coconut oil fatty acid) These amine oxides can be used alone or in combination of two or more kinds.

The blending amount of the component (B) in the detergent composition of the present invention varies depending on the dosage form, but is 0.1 to 10% by weight, particularly 1
~ 5% by weight is preferred.

Component (A) in the detergent composition of the present invention
A / B = 100/1 in terms of weight ratio with the component (B).
To 2/1, particularly preferably 50/1 to 5/1. Further, the total amount of the components (A) and (B) blended varies depending on the dosage form of the detergent composition, but in the case of a liquid detergent, it is 5 to 50 in the composition.
It is preferably 15% by weight to 50% by weight in the case of a paste-like detergent and 40 to 95% by weight in the case of a solid detergent.

By adding a higher fatty acid salt (C) to the detergent composition of the present invention, in addition to the above characteristics,
Further, a cleaning agent having a good foaming property and a good feeling of foam can be obtained. Here, the higher fatty acid salt (C) has, for example, 8 to 2 carbon atoms.
The base salt of the fatty acid of 2 is mentioned. Specifically, in addition to single fatty acids such as lauric acid, myristic acid, palmitic acid, isostearic acid, and oleic acid, coconut oil fatty acid,
Mention may be made of basic salts of mixed fatty acids such as beef tallow fatty acid. Here, as the salt, inorganic basic salts such as sodium and potassium, ammonium salts, monoethanolamine salts,
Examples thereof include alkanolamine salts such as diethanolamine salt and triethanolamine salt (hereinafter abbreviated as TEA), basic amino acids such as lysine and arginine. These higher fatty acid salts (C) do not necessarily need to be compounded as fatty acid salts, and fatty acids and bases may be independently compounded to form fatty acid salts in a formulation. These higher fatty acid salts may be used alone or in admixture of two or more. The blending amount of the higher fatty acid salt (C) in the detergent composition of the present invention varies depending on the blending amounts of the component (A) and the component (B), and the weight ratio is (C) / (A) +.
(B) = 1/20 to 1/2, particularly preferably 1/10 to 1/3.

The detergent composition of the present invention includes other surfactants such as alkyl sulfates, alkyl sulfonates, polyoxyethylene alkyl sulfates, alkylbenzene sulfonates, N-acyl amino acid salts and N-acyl. Anionic surfactant such as -N-methyl taurine salt, alpha olefin sulfonate, alkyl ether acetate, polyoxyethylene alkyl ether acetate, fatty acid amide, polyoxyethylene alkyl ether, sugar ester type, sugar ether type, sugar An amide-based nonionic surfactant, an imidazoline-based amphoteric surfactant, a betaine-based amphoteric surfactant, etc. may be optionally used in combination within a range that does not impair the effects of the present invention.

Further, as other additives, components usually used in detergents can be optionally used in combination within a range not impairing the effects of the present invention. For example, humectants such as propylene glycol, sorbitol, glycerin,
Addition of viscosity modifiers such as carboxyvinyl polymer, methyl cellulose, ethanol, polyoxyethylene glycol distearate, pearling agents, fragrances, pigments, UV absorbers, antioxidants, bactericides, anti-inflammatory agents, preservatives, etc. be able to.

The detergent composition of the present invention is manufactured by a conventional method and can be made into a paste form, a gel form, a liquid form, a solid form, etc., and is used as a detergent for the body such as skin or hair. It is suitable, and is particularly preferably used for skin cleansing.

[0022]

EXAMPLES Next, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

Examples 1 to 10 and Comparative Examples 1 to 5 A cleaning composition having the composition shown in Table 1 below was prepared, and the foaming amount and feeling of use of these cleaning compositions were measured by the following method. And evaluated based on the criteria. Table 1 shows the results.

(Evaluation of foaming amount) A 20-fold diluted aqueous solution was prepared for each detergent composition, and 100 ml of this solution was prepared.
(Liquid temperature 40 ° C) is injected into the graduated cylinder. Next, a stirring blade is installed in the above solution, and stirring is started for 30
The volume (ml) of the foam generated after 2 seconds was measured and used as the foaming amount. The rotation speed of the stirring blade was 1000 rpm, and it was reversed every 5 seconds.・ Evaluation criteria ◎; foaming amount of 250 ml or more ○; foaming amount of 200 ml to less than 250 ml △; foaming amount of less than 200 ml

(Evaluation of Feel of Use) With respect to each detergent composition, 10 panelists each of male and female were asked to wash their bodies for one week, and sensory evaluation was performed. For the evaluation, an average value was calculated based on the following criteria. When the average value was 4.5 or more, it was very good (⊚), when 3.5 to 4.4, it was good (∘), and 2.5 to 3. The case of 4 was judged to be normal (Δ), and the case of 2.4 or less was judged to be defective (x). Defoaming during rinsing 5; Good defoaming 4; Good defoaming 3; Normal 2; Poor defoaming 1; Poor defoaming Sliding during rinsing, sliding after rinsing and sliding after drying 5; Good sliding 4; Slightly sliding 3; Normal 2; Sliding is slightly bad 1; Sliding is bad

[0026]

[Table 1]

Example 11 (Compounding composition) (% by weight) N-Lauroyltaurine TEA 27 Lauryldimethylamine oxide 3 TEA laurate 4 TEA myristate 2 Dibutylhydroxytoluene 0.2 Perfume 0.5 Ethanol 3 Purified water balance The above composition According to the composition, the above-mentioned components were dissolved in heated water, and after cooling, the above-mentioned components were added to prepare a liquid detergent composition. When the skin was washed with the obtained detergent composition, the foaming was very good, the foam was broken and the sliding from the time of rinsing to the time of drying was good, and the feeling of use was excellent.

[0028]

EFFECT OF THE INVENTION The cleaning composition of the present invention has excellent foaming properties, low irritation, good foam breakage, and high lubricity on the surface of the object to be cleaned from the time of rinsing to the time of drying, and is used. There is no squeaky or tight feeling afterwards,
It has excellent usability and is particularly suitable for cleaning the skin.

Claims (2)

[Claims] 1. The following components (A) and (B) (A) A secondary amide type N-acyl taurine salt represented by the following general formula (1): embedded image R ¹ CONHCH ₂ CH ₂ SO ₃ M (1) (In the formula, R ¹ CO represents a linear acyl group having 10 to 16 carbon atoms, and M represents sodium, potassium or alkanol ammonium.) (B) Amine oxide is contained. Cleaning composition. 2. The cleaning composition according to claim 1, further comprising (C) a higher fatty acid salt.