KR19980051476A - Mild liquid cleanser composition - Google Patents

Abstract

The present invention relates to a liquid face wash composition comprising N-acyl glutamate of formula (I), cocamidopropylbetaine of formula (II), and a fatty acid soap of formula (III) will be.

Wherein M ₁ represents an alkali metal cation, alkaline earth metal cation, ammonium or the like which is a cosmetically acceptable counter ion, COR ₁ represents C ₆ -C ₃₄ acyl, and R ₂ is alkyl having 8 to 20 carbon atoms And fatty acids derived from animal oils such as tallow and lard, and vegetable oils such as palm oil and palm oil, and M ₂ represents sodium and / or potassium.

Description

Mild liquid cleanser composition

In general, the main function of the face wash is a cleaning function. Facial cleansers require not only skin removal but also makeup removal. In addition to the cleansing function, the face wash requires various functions such as sufficient foaming power, excellent feeling of use, moisturizing and nourishing the skin. Among these various functions, the cleaning function is the most important function, and in particular, it should play a role of removing cosmetics from the skin. The application of cosmetics on human skin (particularly the face) is used by women as a means to enhance aesthetics and to protect the skin from external stimuli (sunshine, wind, boiling). Cosmetics applied to the skin should be removed after a certain amount of time disappears. Cosmetics, in particular, cosmetics such as lip stacks and mascara, which are mainly composed of waxes, are strongly adhered to the skin and may not be completely removed by normal washing or may irritate and damage sensitive skin due to strong cleaning power. Therefore, the cleanser applied to the skin, especially the face, is a product that requires proper cleansing power and hypoallergenic skin.

The cleaning ingredient used in the face wash may be a general fatty acid soap using an alkali salt of a higher fatty acid as a base, a synthetic surfactant soap using a synthetic surfactant as a base, or a general fatty acid soap and a synthetic surfactant. Or it can be summarized as three kinds of complex soaps used as a mixture of auxiliary bases, fatty acid soaps, sodium or potassium salt of 8 to 20 carbon atoms, fatty acids are palm oil, palm oil, soybean oil, castor oil, olive oil, palm It is obtained from vegetable oils such as nuclear oil and animal fats such as tallow, pork and fish oil, and can be used alone. In the case of the synthetic surfactant soap, any surfactant commonly used in soaps such as sodium lauryl sulfonate, sodium salt of alkylbenzenesulfonate, sodium cocoyl isethionate and the like can be used. In addition, in the case of a complex soap, the raw materials used in the general fatty acid soap and synthetic surfactant soap can be mixed and used as a periodic agent or auxiliary base.

In the case of the present invention, by using a mixture of a general fatty acid soap and a synthetic surfactant, it was intended to satisfy the appropriate cleaning power, sufficient foaming power, excellent feeling and skin hypo-irritability.

Typically, soaps have been used as skin cleaners. Most soaps contain a mixture of soaps derived from coconut fat and tallow. Other soluble soaps derived from lauryl acid soaps and coconut wishes contribute to the foaming properties of the overall composition, while longer chain soaps obtained from tallow provide a structure. Soap as a detergent has the advantages of good foaming power, clean feeling and low price, but has the disadvantage of giving skin irritation and picking feeling. Therefore, in order to make use of the advantages of these soaps and to compensate for the disadvantages, a mixture of surfactants was used.

Sulfates are currently used as surfactants. These compounds have been used as main surfactants in almost all detergents because of their excellent detergency, abundant foaming power, and low cost. However, recently, human toxicity, environmental safety and the like tend to be a problem. Also widely used surfactants are phosphates. Despite the excellent cleaning power and low human dynamics, the disadvantages are the environmental safety issues of eutrophication. With increasing interest in human safety, the development of surfactants that satisfies the desired properties (cleaning power, foaming power, etc.) while reducing the toxicity of the surfactants has been actively progressed in recent years, and the use thereof is rapidly increasing. to be.

Surfactants known to be mild today include amino acid surfactants, polypeptide surfactants, amine oxide surfactants, betaine surfactants, sulfosuccinate surfactants, imidazoline surfactants, and phosphate surfactants. And alkyl saccharide surfactants, alkyl taurate surfactants, alkyl polyglycoside surfactants, and polyoxyethylene sorbitan fatty acid ester surfactants.

The present inventors used the cytotoxicity test method to evaluate the human stability of these surfactants, and carried out acute fish toxicity test as a means to evaluate the environmental safety, and measured the cleaning power test and bubble generation as part of the evaluation of the feeling. . From these experiments, it was found that it is preferable to use N-acyl glutamate as a main component of a mild liquid cleanser.

Attempts have been made to combine N-acyl glutamate with various surfactants to expect beneficial properties.

Japanese Patent Application No. 73119550 (AJINOMOTO) discloses that a detergent mainly composed of monosodium N-oleyl-L-glutamate and lecithin is superior in cleaning power to that containing no lecithin.

Japanese Patent Application No. 7141608 (KAO SOAP) describes a cleaning composition composed mainly of N-lauryl-L-glutamic acid monosodium salt and chimethyldodecylamine oxide.

Japanese Patent Application No. 77117670 (KANEBO) describes a cleaning composition composed mainly of N-acyl glutamate, organic carboxylic acid and phosphoric acid, and has excellent foaming power, cleansing power, and hypoallergenic skin.

European Patent Application No. 324575 (KAO) describes a cleaning composition composed mainly of nonionic surfactants, phosphate-based surfactants, N-acyl gfutamate, isethionate and sulfosuccinate. It is characterized by polarity.

As described above, many attempts have been made to produce a mild detergent that is hypoallergenic to the human body using N-acyl glutamate, but it is appropriate to use a mild surfactant N-acyl glutamate, an amphoteric surfactant, cocamidopropyl betaine and fatty acid soap. There has been no prior art for a gentle liquid cleansing composition that is excellent in cleansing, foaming, and usability in combination with safety for humans and the environment.

The present inventors have comparatively tested various physical properties such as cytotoxicity, fish toxicity, detergency, and foaming power against many surfactants known to be mild, and they contain N-acyl glutamate as a main component and cocamido as an amphoteric surfactant. The liquid face cleanser composition prepared by properly combining propyl betaine and fatty acid soap has excellent cleaning power and foaming ability, and is practically safe for human body, safe for the environment, and can be safely applied to people with sensitive skin. The present invention has been completed.

The present invention contains at least one N-acyl glutamate of formula (I), at least one cocamidopropyl betaine of formula (II), and at least one fatty acid soap of formula (III) It relates to a liquid face wash composition characterized in that.

_{One One 6 34 8 18 10 14 2 2}

The present invention relates to a face wash composition. In particular, the present invention relates to a liquid face wash composition comprising N-acyl glutamate as a main component and containing 8 to 20 carbon-based fatty acid soaps and cocamidopropyl betaine. Liquid face wash composition of the present invention is safe for human body and environment.

Claims (5)

N-acyl glutamate of the following general formula (I), cocamidopropylbetaine of the following general formula (II), and at least one fatty acid soap of the following general formula (III) Liquid facial cleanser composition. M ₁ represents an alkali metal cation, alkaline earth metal cation, ammonium, or the like which is a cosmetically acceptable counter ion, COR ₁ represents C ₆ -C ₃₄ acyl, R ₂ is alkyl having 8 to 20 carbon atoms, Fatty acids derived from animal oils such as pork and vegetable oils such as palm oil and palm oil, and M ₂ represents sodium and / or potassium. The face wash composition according to claim 1, wherein M ₁ is triethanolamine. The face wash composition according to claim 1, which contains 5 to 40% by weight of N-acyl glutamate of formula (I). The facial cleanser composition according to claim 1, which contains 1 to 30% by weight of cocamidopropyl betaine of the general formula (II). The facial cleanser composition according to claim 1, which contains 1 to 15% by weight of a fatty acid soap of Formula (III).