JP7471160B2 - Cleansing agent - Google Patents

Description

The present invention relates to a cleaning agent.

Traditionally, various cleansing products have been developed, and those based on higher fatty acid salts are used in face washes and body cleansers because they have excellent cleansing power, good foaming, and a refreshing feel. However, their strong cleansing power can also remove sebum and other substances necessary for the skin, causing problems such as dryness and tightness of the skin after cleansing.

In order to improve the dryness and tightness of the skin after cleansing, there are examples in which it is used in combination with a polyoxypropylene adduct of diglycerin (Patent Document 1) and in which it is used in combination with a plant extract (Patent Document 2), but both of these methods are insufficient in effect and have not yet solved the problems.
Furthermore, Patent Document 3 discloses a skin cleanser containing a higher fatty acid salt, tamarind gum, di-fatty acid acyl glutamic acid lysine, and glucopyranosylglycerol, but there is room for improvement in terms of foaming and moisturizing effect.

Japanese Patent Application Laid-Open No. 6-116135 Japanese Patent Application Laid-Open No. 10-88193 JP 2018-002609 A

Therefore, the objective of the present invention is to provide a cleanser that solves the above problems, has good foaming and foam quality, and has excellent moisturizing effects.

That is, the present invention provides a cleansing agent containing the following (A) to (C):
(A) Higher fatty acid salt (B) Quince seed extract (C) Diacyl glutamic acid lysine

The cleansing agent of the present invention has excellent foaming properties, foam quality, and moisturizing properties.

The component (A) higher fatty acid salt used in the present invention is not particularly limited, but a pre-neutralized higher fatty acid salt may be blended, or a higher fatty acid salt may be formed by neutralizing a higher fatty acid with a base and blended. As the higher fatty acid, any of saturated, unsaturated, straight-chain, and branched fatty acids may be used, and those having 8 to 24 carbon atoms are preferable. Specific examples include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, undecylenic acid, 2-palmitoleic acid, oleic acid, ricinoleic acid, linoleic acid, linolenic acid, arachidonic acid, coconut oil fatty acid, palm kernel oil fatty acid, etc. Examples of bases for generating higher fatty acid salts include inorganic bases such as sodium, potassium, and magnesium, alkanolamines such as ammonium, monoethanolamine, diethanolamine, triethanolamine, and 2-amino-2-methylpropanol, and basic amino acids such as lysine and arginine. Among these, it is preferable to use one or more acids selected from lauric acid, palmitic acid, myristic acid, and stearic acid neutralized with potassium hydroxide.

Component (A) may be used alone or in combination of two or more types, and is preferably used in an amount of 25 to 40% by mass based on the total amount of the cleansing agent of the present invention. If the amount is less than 25% by mass or more than 40% by mass, it may affect stability.

Component (B) quince seed extract used in the present invention is an extract obtained from the seeds of the quince tree, and commercially available products can be used. It is preferable to use water as the extraction solvent when obtaining quince seed extract.

The amount of quince seed extract in the cleanser of the present invention is preferably 0.005 to 0.1% by mass, and more preferably 0.005 to 0.05% by mass, based on the total amount of the cleanser, in terms of pure extract content. If the amount is less than 0.005% by mass based on the total amount of the cleanser, the foam quality and moisturizing effect may not be fully achieved. If the amount is more than 0.1% by mass, a film characteristic of polymers may be formed on the skin, impairing the feel when used, which may be undesirable.

Commercially available products of component (B) include Quince Seed 2S, Quince Seed 2SP, and Quince Seed G (all manufactured by Dai-Nippon Kasei Co., Ltd.), Quince BG, Quince BG/EPH, Quince E, Quince S, and Quince S/PHE (all manufactured by Koei Kogyo Co., Ltd.), etc.

The component (C) di-fatty acid acyl glutamic acid lysine used in the present invention can be synthesized by reacting lysine hydrochloride with fatty acid acyl glutamic acid, and can be incorporated in the form of a free form or a salt. The salt can be used without any particular limitation, and examples thereof include alkali metal salts such as sodium salts and potassium salts, alkaline earth metal salts such as calcium salts and magnesium salts, and organic amine salts such as ammonium salts, triethanolamine salts, and monoethanolamine salts. As the fatty acid of the acyl group, any of saturated, unsaturated, straight-chain, and branched fatty acids can be used, and specific examples thereof include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, isostearic acid, undecylenic acid, petroselinic acid, oleic acid, ricinoleic acid, linoleic acid, linolenic acid, arachidonic acid, coconut oil fatty acid, and palm kernel oil fatty acid. Among these, it is preferable to use di-lauroyl glutamic acid lysine and/or its salts.

Component (C) may be used alone or in combination of two or more types, and is preferably blended in an amount of 0.02 to 0.5% by mass based on the total amount of the cleansing agent of the present invention. If the blending amount is less than 0.02%, it may affect the foam quality and moisturizing effect, and if it exceeds 0.5% by mass, it may affect stability. Commercially available products include Pellicer L-30 and Pellicer LB-10 (both manufactured by Asahi Kasei Chemicals Corporation).

In addition to the above-mentioned components, the cleansing agent of the present invention may contain any optional components commonly used in cosmetics, etc., to the extent that they do not impair the effects of the present invention. Specific examples include purified water, oils, surfactants, thickeners, preservatives, fragrances, UV absorbers, moisturizers, antioxidants, anti-inflammatory agents, antibacterial agents, etc.

The cleansing agent of the present invention is produced by a conventional method and can be in the form of a solid, liquid, emulsion, cream, paste, gel, ointment, etc. The cleansing agent of the present invention can be used as a face wash, whole body cleanser, hand soap, shampoo, etc., and is preferably used as a face wash.

The present invention will be specifically explained below using examples, but the scope of the present invention is not limited thereto. The blending amounts are in mass % unless otherwise specified.

The cleansing agents of the Examples and Comparative Examples in Table 1 were produced by a standard method. The Examples and Comparative Examples were evaluated for foaming, foam quality, and moisturizing effect by the following methods. The results are shown in Table 1.
a) Foaming, foam quality, and moisturizing effect A facial use test was conducted by three expert panelists, who made an absolute evaluation of the foaming, foam quality, and moisturizing effect of the cleansing agents listed in Table 1 in accordance with the evaluation criteria below, and judged them by consensus in accordance with the following criteria.
<Evaluation criteria>
Very good ◎
Good 〇Slightly bad △
Bad ×

As is clear from the results shown in Table 1, the cleansers of each Example were superior in all aspects of foaming, foam quality, and moisturizing effect compared to the cleansers of the Comparative Examples.

Claims (1)

A skin cleansing agent containing the following (A) to ( D ).
(A) 25 to 40% by mass of a salt of a higher fatty acid having 8 to 24 carbon atoms
(B) Quince seed extract 0.005 to 0.1% by mass
(C) 0.02 to 0.5% by mass of sodium dilauroyl glutamate lysine
(D) Glycerin