JPH06293628A - Cleaning agent - Google Patents

Abstract

PURPOSE:To obtain a cleaning agent composition having only a slight skin irritation, making skin wet and smooth, providing skin with moisture and luster. CONSTITUTION:This cleaning agent composition comprises an anionic surfactant and a fatty acid polyoxyethylene glycerol, has only a slight skin irritation and is useful for human skin and hair.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleansing agent for human skin or hair which may come into contact with human skin when used.

[0002]

2. Description of the Related Art Conventionally, soap or face cleansing cream containing soap is often used as a cleanser for human skin. Sodium alkyl sulphate, sodium alkyl ether sulphate and the like have been used as the main cleaning agents for hair cleaners, ie shampoos. These are described in the latest Cosmetic Science, July 10, 1992, pages 192 to 193, Yakuji Nippo.

In the case of soap, it is generally said that it has a skin irritating effect, and especially in the case of soap having a fatty acid of 12 carbons, it is said that skin irritant is strong, and coconut oil having a high content is used as a raw material. In this case, while this is the case, it is difficult to exclude it from the raw materials because soap of fatty acid having 12 carbon atoms has excellent water solubility and foaming property.
Alkyl sulphates and alkyl ether sulphates also have skin irritation, and the carbon number 12 of alkyl is the most irritating, but the foaming properties of detergents are also high, making it difficult to exclude them from the raw materials. .

As a countermeasure, anionic surfactants other than those mentioned above, for example, sodium monoalkylphosphate, amino acid derivatives such as monoalkylglutanate, and other surfactants having relatively low skin irritation are used. Although it has been proposed, these are expensive and general-purpose is difficult.

As the detergent that may come into contact with the skin, in addition to the above-mentioned surfactants, sodium alkylbenzene sulfonate and the like are also used, but these also belong to the category of the one having a large skin irritation.

[0006]

Means for Solving the Problems Soap, alkyl sulfate, alkyl ether sulfate, alkyl sulfonate,
By mixing with anionic surfactants such as alkylbenzene sulfonate, which are irritating to human skin,
As a result of diligently examining various additives that reduce the irritation and improve the cleaning properties, foaming properties, water solubility, etc., without interfering with them, fatty acid polyoxyethylene glycerin is suitable for the purpose. And completed the present invention.

The anionic surfactant used in the present invention contains at least soap, alkyl sulfate, alkyl ether sulfate, olefin sulfonate and alkylbenzene sulfonate.

Soken is a higher fatty acid salt and is represented by the general formula R ₁ COOM ... (1). Here, R ₁ is alkyl having 9 to 12 carbon atoms,
Such as alkenyl. R ₁ COOH may be a saturated fatty acid such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, or an unsaturated fatty acid such as palmitooleic acid, oleic acid, linoleic acid, It may also be a mixture of the above fatty acids. M is
It represents a cation of soap and may be any of sodium, potassium, ammonia, ethanolamine, diethanolamine, triethanolamine and the like, and may be a mixture. Soap is generally produced by removing glycerin from a mixture of natural fat and oil and sodium hydroxide that has been hydrolyzed and heated.The natural fat and oil also has a relatively large molecular weight of fatty acids, for example, beef tallow and molecular weight Since a relatively small amount, for example, coconut oil is often used as a mixture,
Fatty acids are often mixed in various ways.

The alkyl sulfate of the present invention has 10 to 10 carbon atoms.
22 is the sulfated salt of the alcohol. This is shown by the general formula _{R 2 -OSO 3 M ···· (2} ), R 2 is R ₁
—CH ₂ —, M are the same as in the case of Soken, for example,
Examples thereof include sodium, potassium, triethanolamine, diethanolamine and the like.

[0010] alkyl ether sulfates are represented by the general formula _{R 2 O (CH 2 -CH 2} O) n SO 3 M ···· (3), wherein R ₂ and R ₂ of formula (2) Same as above, M is the same as M in formula (1). n is an integer of 1 to 20.
For example, polyoxyethylene lauryl ether ammonium sulfate (2EO), polyoxyethylene myristyl ether sodium sulfate, polyoxyethylene oleyl ether ammonium sulfate and the like can be used.

The alkyl benzene sulfonate has the general formula:

[Chemical 1] R ₃ is an alkyl group having 6 to 18 carbon atoms, and M is
It is the same as M in the formula (1). For example, sodium laurylbenzene sulfonate belongs to this category.

The anionic surfactants of this patent are soaps, alkyl sulfates, alkyl ether sulfates, alkylbenzene sulfonates, or mixtures thereof, as described above, to varying degrees. Has skin irritation.
Although examples of these anionic surfactants are given above, the present patent is not limited to these examples.

The fatty acid of the fatty acid polyoxyethylene glycerin of this patent is a fatty acid having 6 to 18 carbon atoms, and the number of added moles of polyoxyethylene is about 2 to 20. For example, coconut oil fatty acid monoglyceride addition-polymerized with 7 mol of ethylene oxide can be preferably used.
And the addition amount is 5 to the amount of the anionic surfactant.
It may be about 100%.

In the present invention, when an aqueous solution of an anionic surfactant is used for a person having healthy skin for a normal use, that is, for about 5 minutes, it is immediately rinsed off with a large amount of water or lukewarm water. However, there is almost no skin irritation that is visible to the naked eye. However, in the case of contact for a long time or in a person with sensitive skin, skin irritation is recognized even in a short time. In the case of the present application, a 10% aqueous solution of an anionic surfactant is used on the inside of the upper arm of a person with normal skin to
The degree of skin irritation was confirmed by performing a closed patch test for 4 hours and then visually observing the skin.

[0015]

[Example] Cleaning agent No. 1 shown in Table 1 I made 1-10.

[Table 1] Of these, No. 2, 4, 6, and 8 are examples of the present invention, and others are reference examples. Table 2 shows the properties, cleaning properties, foaming properties, and patch test results of these liquids. The patch test was performed on the inside of the upper arms of five panelists (male and adult) under the condition of a closed patch test for 24 hours. Coconut oil fatty acid polyoxyethylene glyceryl (7E used here
O) is the product name Glycerox HE of Croda Japan
Is.

[Table 2] The sign of the patch test in this table is as follows:-: No change +: Slightly red ++: Slightly red, with deep red part +++: Shows deep red. From this table, addition of coconut oil fatty acid polyoxyethylene glyceryl does not adversely affect the solubility, detergency and foamability. The patch test is No. 1 and N
o. 2, No. 3 and No. 4, No. 5 and No. 6, N
o. 7 and No. Comparing 8 with each other, it can be seen that addition of coconut oil fatty acid polyoxyethylene glyceryl 7EO reduces skin irritation. Especially, the effect is remarkable in the case of stone ken.

[0016]

As described above, by additionally adding the fatty acid polyoxyethylene glycerin to the anionic surfactant, a detergent with less skin irritation can be obtained,
Further, even if added additionally, the action of the surfactant can be almost maintained. that's all

Claims (1)

[Claims] 1. A cleansing agent containing a nonionic surfactant and a fatty acid polyoxyethylene glycerin, which causes less skin irritation.