JPH0441716B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a novel cleaning composition, and more particularly to a cleaning composition containing N-acylglutamate as a main base. [Prior Art] Conventionally, various surfactants have been used as the main base of various detergents, but among them, N-acylglutamate is less irritating and gentler on the skin and hair. It has been widely used because its liquid properties are slightly acidic, which is the same as the pH of the skin. An example of a cleaning agent containing such an N-acylglutamate is JP-A-56-106999,
This document discloses a cream facial cleanser. [Problems to be solved by the invention] N-acylglutamate contains sodium,
Alkali metals such as potassium, organic amine salts such as triethanolamine (hereinafter abbreviated as TEA), 2-amino-2-methylpropanol, 2-amino-2-methylpropanediol, or lysine,
There are basic amino acid salts such as arginine, and among these, alkali metal salts, especially sodium (hereinafter abbreviated as Na) salts, are particularly frequently used because they have excellent foaming properties and creamy foam quality. Because of its high kraft point, it had the drawbacks of being prone to crystallization at low temperatures, as well as having a strong slimy feel when used and being difficult to rinse. Therefore, its use is limited to solid or pasty formulations, and even then, when made into a paste-like detergent, it becomes hard at low temperatures, or when used as a body wash, it has a strong slimy feel. shortcomings were pointed out. [Means for Solving the Problems] Therefore, the present inventors conducted extensive research in order to take advantage of the properties of alkali metal salts of N-acylglutamic acid and to improve the above-mentioned drawbacks. The present inventors have discovered that the object can be achieved by using a salt and an organic amine salt or basic amine salt of N-acylglutamic acid in a specific ratio, and have completed the present invention. That is, the present invention provides a cleaning composition containing N-acylglutamic acid as a main base, which comprises an alkali metal salt of N-acylglutamic acid and an organic amine salt and/or basic amino acid salt of N-acylglutamic acid. and the weight ratio of the alkali metal salt of N-acylglutamic acid to the organic amine salt and/or basic amino acid salt of N-acylglutamic acid is within the range of 9/1 to 5/5. The present invention provides a cleaning composition characterized by:
It is a particularly pasty or liquid cleaning composition that has excellent stability and foaming properties, has creamy foam quality, and is easy to rinse. JP-A-56-106999 mentions sodium, potassium, ethanolammonium salts, etc. as salts of N-acylglutamate, and describes that two or more of them are used in combination. As such, there is no description of specific combinations, nor is there any description that suggests them. In the examples there is only a combination of potassium and sodium salts. Of course, this combination cannot achieve the object of the present invention. Hereinafter, the configuration of the present invention will be explained in detail. The present invention takes advantage of the foaming and foam properties of alkali metal salts of N-acylglutamic acid, while eliminating the drawbacks of stability (solubility, hardness) and ease of rinsing by using organic amine salts or basic amino acid salts. The aim is to provide synergistic coverage by using them together. The blending ratio of the alkali metal salt and the organic amine salt and/or amino acid salt is in the range of 9/1 to 5/5, and if the alkali metal salt exceeds this range, the stability (solubility, hardness) and ease of scratching will deteriorate. No effect is seen in terms of strength, and if the amount is less than this, the properties of the alkali metal salt will be lost. As the alkali metal salt of N-acylglutamic acid, the conventionally used salts mentioned above, ie, sodium salt, potassium salt, etc., are used, and among these, sodium salt is particularly preferred. As organic amine salts and basic amino acid salts, the conventionally used salts mentioned above, namely TEA, 2-amino-2-methylpropanol, 2-amino-2
- Salts such as methylpropanediol are used, and among these, TEA salts are particularly preferred. In the present invention, the effects of the present invention are most pronounced when the above-mentioned sodium salt and TEA salt are combined and blended. The total amount of alkali metal salts, organic amine salts and/or basic amino acid salts varies depending on the formulation of the intended detergent, but is generally 3 to 30% of the composition for liquid detergents. % by weight, 15-70% by weight for pasty cleaning agents. The acyl group of the N-acylglutamate used in the present invention includes fatty acid residues having 8 to 22 carbon atoms, such as single fatty acid acyl groups such as lauroyl, myristoyl, stearoyl, and oleoyl, as well as coconut oil fatty acid acyl groups. , mixed fatty acid acyl such as hardened beef tallow fatty acid acyl is used. The cleaning composition of the present invention may contain other surfactants, such as polyoxyethylene (hereinafter referred to as POE).
) alkyl sulfate ester salt, N-acyl sarcosine salt, N-acyl-N-methyltaurine salt, phosphate ester salt, sulfosuccinate, α-
Can contain anionic surfactants such as olefin sulfonates, higher fatty acid ester sulfonates, fatty acid soaps, nonionic surfactants such as alkanolamides and POE alkyl ethers, and amphoteric surfactants such as imidazoline and betaine series. . Furthermore, other additives include pullulan, carboxymethylcellulose, carboxyvinyl polymer, polyethylene glycol, cationic polymer, water-soluble polymers such as aluminum magnesium silicate, polyhydric alcohol, pyrrolidone carboxylic acid, and pyrrolidone carboxylic acid sodium salt. (PCA-Na), hyaluronic acid, moisturizing agents such as POE alkyl glycoside ether, lecithin, saponin, natural extracts such as aloe, quince, NaCl,
Electrolytes such as KCl, citric acid, malic acid, fragrances, coloring agents, etc. can be included. [Effects of the Invention] The effects of the present invention will be specifically explained below using test examples. Test Example 1 Liquid detergent composition N-cocoylglutamic acid monosodium salt N-cocoylglutamic acid mono-TEA salt N-cocoylglutamic acid monopotassium salt Total 15% by weight Ion-exchanged water Residual N-cocoylglutamic acid monosodium with the above composition
By changing the blending ratio of Na salt, N-cocoylglutamic acid monoTEA salt, and N-cocoylglutamic acid monopotassium salt, low-temperature solubility, foaming property, foam quality,
Ease of rinsing was observed. (Low-temperature solubility) Transparency was observed when the sample was stored in a 0°C constant temperature bath for one week. (Foam quality, etc.) 10 panelists conducted a hand-washing test with warm water at approximately 35°C, and compared with sample No. 1, the foaming properties, creaminess of the foam quality, and ease of rinsing were the same. , 0, +1 if better, -1 if worse. Judgments were made as follows based on the total score of the 10 evaluations. −10〜−6……× −5〜0……△ 1〜10……○

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[Table] Raw material name 1 2 3 4 5 6

Claims (1)

[Scope of Claims] 1. A cleaning composition containing N-acylglutamic acid as a main base, comprising an alkali metal salt of N-acylglutamic acid, an organic amine salt of N-acylglutamic acid and/or a basic amino acid. salt, and the weight ratio of the alkali metal salt of N-acylglutamic acid and the organic amine salt and/or basic amino acid salt of N-acylglutamic acid is 9/1.
A cleaning composition characterized in that it is within the range of ~5/5. 2. The cleaning composition according to claim 1, wherein the alkali metal salt of N-acylglutamic acid is a sodium salt, and the organic amine salt of N-acylglutamic acid is a triethanolamine salt.