JP2018090518A - Foam-discharge type skin cleanser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hypoallergenic foam-discharge type skin cleanser which has good detergency.SOLUTION: The foam discharge-type skin cleanser contains a total of 2.5 to 12.5 mass% of (A) 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine and (B) an acylglutamate type anionic surfactant.EFFECT: The skin cleanser is particularly useful in baby cleansers because it is hypoallergenic, does not require lathering, and can be quickly washed.SELECTED DRAWING: None

Description

  The present invention relates to a foam discharge type skin cleanser.

Foam discharge type cosmetics filled with cosmetics in a pump former container can obtain foamy cosmetics without using a propellant such as an aerosol. It is applied in various fields such as cosmetics for cosmetics (Patent Document 2), hair styling materials (Patent Document 3), oral compositions (Patent Document 4), hair dyes (Patent Document 5).
In particular, there are many products on the market for baby washing products because they do not need to be foamed and can be washed quickly. However, baby cleaning materials are required to have low irritation and appropriate cleaning power. So far, no cleaning material having both cleaning power and low irritation has been obtained.

Japanese Patent Laid-Open No. 7-252131 Japanese Patent Laid-Open No. 10-18281 JP-T-2001-522869 JP-A-10-87456 JP 2001-37750 A

  An object of the present invention is to provide a foam discharge type skin cleanser which is hypoallergenic and has a good cleaning power.

The present invention
(A) 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine;
(B) an acyl glutamate type anionic surfactant,
A foam discharge type skin cleanser containing 2.5 to 12.5% by mass in total is provided.

  The foam discharge-type water-based skin cleanser of the present invention exhibits the effect of being low in irritation and having good cleaning power.

  Hereinafter, modes for carrying out the present invention will be described.

  The (A) 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine used in the present invention is mainly composed of 1-hydroxyethylimidazoline having an n-alkyl group having 8 to 20 carbon atoms at the 2-position. It is an amphoteric surfactant obtained by converting. As such a surfactant, a commercially available surfactant can be used. For example, MIR Anon GLM-R (manufactured by NOF Corporation), Anholex 35N (manufactured by Miyoshi Oil & Fats Co., Ltd.), Anholex 50 (manufactured by Miyoshi Oil & Fats Co., Ltd.), Anholex K-80 (manufactured by Miyoshi Oil & Fats Co., Ltd.), Enajol CNS (Lion Corporation) Product), ovazoline 552 (manufactured by Toho Chemical Industry Co., Ltd.), Swanol AM-101 (manufactured by Nippon Surfactant Kogyo Co., Ltd.), softazoline CH (manufactured by Kawaken Fine Chemical Co., Ltd.), softazoline CL (manufactured by Kawaken Fine Chemical Co., Ltd.), and the like.

  Specific examples of (B) acyl glutamate used in the present invention include coconut oil fatty acid acyl glutamate potassium, coconut oil fatty acid acyl glutamate sodium, coconut oil fatty acid acyl glutamate triethanolamine, lauroyl glutamate potassium, lauroyl glutamate sodium, lauroyl glutamate triacetate. Examples include ethanolamine, potassium myristoyl glutamate, sodium myristoyl glutamate, potassium stearoyl glutamate, sodium stearoyl glutamate, disodium stearoyl glutamate, sodium beef tallow fatty acid acyl glutamate, coconut oil fatty acid / hardened tallow fatty acid sodium acyl glutamate and the like. These components may be used alone or in combination of two or more.

  The detergent of the present invention is characterized in that the surfactant content is 2.5 to 12.5% by mass, preferably 2.5 to 5.5% by mass. When the amount is less than 2.5% by mass, the cleaning power is insufficient. If it exceeds 12.5% by mass, it may cause a problem in safety.

  The cleaning material of the present invention preferably has a pH of 4.5 to 6.5 by adding a pH adjuster. The pH adjuster is not particularly limited, but preferably exemplified is lactic acid, citric acid, phosphoric acid, malic acid, butyric acid, and salts thereof. The pH adjusters may be used alone or in combination of two or more.

  The pH adjuster is blended in an amount of 0.01 to 1% by mass with respect to the amount necessary for maintaining the pH of the cleansing agent at a moderate weakly acidic pH of about 4.5 to 6.5, that is, the total amount of the skin cleansing agent. .

  The skin cleansing material of the present invention preferably contains glycerin for the purpose of imparting a moist feeling after washing. The blending amount of glycerin is 1 to 15% by mass, preferably 1 to 5% by mass with respect to the total amount of the cleaning material. If the blending is less than 1% by mass, sufficient moist feeling may not be obtained. If it exceeds 15% by mass, the stability over time may not be maintained.

  The skin cleansing agent of the present invention preferably contains a C3-8 glycol for the purpose of reducing the amount of the antibacterial agent. Among such glycols, it is preferable to blend 1,3-butylene glycol. The blending amount of glycols is 1 to 10% by mass, preferably 5 to 10% by mass, based on the total amount of the cleaning material. When the amount is less than 1% by mass, the antibacterial effect may not be recognized.

  The foam discharge type skin cleansing material of the present invention is obtained by filling the above-mentioned skin cleansing material into a container equipped with a foam discharge mechanism. A container equipped with a foam discharge mechanism means a non-aerosol (also referred to as non-gas) type other than an aerosol-type foam discharge container using a propellant, and a skin cleansing agent filled in the discharge container and air Are mixed and allowed to pass through a porous membrane, and can be discharged in the form of foam. Specifically, a pump former, a squeeze former, etc. can be illustrated.

Further, one or a plurality of porous membranes inside the discharge container are provided, and the number of pores in the membrane is not particularly limited, but 100 to 400 mesh is preferable from the viewpoint of fine foam quality, and 150 to
It is more preferable to use 300 mesh.

  In addition to the above components, the foam discharge-type skin cleanser of the present invention further includes components used in normal cleansers, such as moisturizers, oily components, bactericides, anti-inflammatory agents, antiseptics, chelating agents, thickeners. Agents, salts, fragrances, cooling agents, pigments, ultraviolet absorbers, antioxidants, plant extracts, and the like.

  The foam discharge type skin cleansing material of the present invention can be applied as, for example, a facial cleanser, a cleansing material, a body soap, a hand soap, a shampoo or the like.

The present invention will be described below with reference to examples, but the technical scope of the present invention is not limited thereto.

  The evaluation methods of Examples and Comparative Examples of the present invention are as follows.

[Detergency evaluation method]
Apply an appropriate amount of artificial sebum to the inner part of the forearm. Then, rub 10 times to draw a circle with a certain amount of examples or comparative examples. After washing with tap water, whether or not artificial sebum was removed was visually evaluated. The case where the sebum was removed was designated as “◯”, and the case where the sebum remained was designated as “x”.

[Skin irritation evaluation method]
The results of the 24-hour occlusion patch test and the ease of oozing with the sensory evaluation were relatively evaluated, and the evaluation was comprehensively performed in the following three stages.
Very low skin irritation: ◎
Low skin irritation: ○
There is skin irritation: ×

  Tables 1 to 3 show skin cleansing formulations according to examples and comparative examples of the present invention. The cleaning material was prepared according to a conventional method, filled in a pump-type foam discharge container, and used for evaluation.

  As shown in Table 1, the comparative example using the acylmethyl taurine salt was high in skin irritation, but the example using the acyl glutamate of the present invention was a combination of detergency and low irritation. It was a cleaning fee.

  As shown in Table 2, skin irritation was observed in Comparative Example 3 in which the total concentration of surfactants was 14.2% by mass, but the total concentration of surfactants was 3.6 to 12.48 mass% Examples 2-4 had a low skin irritation.

  As shown in Table 3, Comparative Example 4 in which the total pure component concentration of the surfactant was 0.92% by mass was inferior in detergency.

Claims (1)

(A) 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine;
(B) an acyl glutamate type anionic surfactant,
A foam discharge type skin cleanser containing 2.5 to 12.5 mass% in total.