CN-122005345-A - Composition for cleaning skin and application thereof

Abstract

The invention discloses a composition for cleaning skin and application thereof, and belongs to the field of daily chemicals. The composition comprises glycolipid and laureth carboxylic acid surfactant in a specific weight ratio. Wherein the glycolipid is preferably sophorolipid, and the laureth carboxylic acid surfactant is preferably laureth-5 carboxylic acid. The composition of the invention remarkably improves the cleaning efficiency of unsaturated fatty acids (such as oleic acid and squalene) on the surface of skin on the premise of not excessively adding an effective anionic surfactant or sacrificing the mildness of the product. Meanwhile, the composition can effectively reduce the denaturation damage to skin keratin, has good skin mildness and safety, and is suitable for washing-off type personal care products such as face cleaning, hair washing, bathing and the like.

Inventors

• ZENG CHUAN
• BAI XIAO
• YE TONG
• LUAN WENWEN
• SUN XIN
• LIU YIYANG

Assignees

• 苏州不凡生物科技有限公司

Dates

Publication Date

20260512

Application Date

20260323

Claims (9)

1. 1. A composition for skin cleansing comprising glycolipid and laureth carboxylic acid surfactant, the mass ratio of the glycolipid to the laureth carboxylic acid surfactant is 3:1 to 1:3.
2. 2. The composition of claim 1, wherein the glycolipid is a sophorolipid.
3. 3. The composition of claim 1, wherein the laureth carboxylic acid surfactant is laureth-5 carboxylic acid.
4. 4. The composition of claim 1, wherein the composition further comprises an anionic surfactant.
5. 5. The composition of claim 4, wherein the anionic surfactant is selected from one or more of sodium laureth sulfate, sodium laurylsulfate, and sodium cocoyl methyl taurate.
6. 6. The composition of claim 1, wherein the composition further comprises a zwitterionic surfactant.
7. 7. The composition of claim 6, wherein the composition comprises, the amphoteric surfactant is selected from one or more of cocamidopropyl betaine, sodium lauroyl amphoacetate and disodium cocooyl amphodiacetate.
8. 8. Use of a composition according to any one of claims 1 to 7 for the preparation of a rinse-off personal care product for cleansing skin unsaturated fatty acids, characterized in that the unsaturated fatty acids are oleic acid and/or squalene.
9. 9. Use of a composition according to any one of claims 1 to 7 in the manufacture of a rinse-off personal care product having reduced skin irritation, wherein the care product is in the form of a facial cleanser, shampoo, body wash or hand wash.

Description

Composition for cleaning skin and application thereof Technical Field The invention relates to the technical field of daily chemicals, in particular to a composition for cleaning skin and application thereof. Background Sebum secreted by the skin contains a large amount of unsaturated fatty acids, such as squalene and oleic acid, which are critical to maintaining the skin barrier function. However, unsaturated fatty acids have unsaturated bonds due to their chemical structures, and are very easily oxidized by air to form oxidation products and free radicals, which cause skin inflammation and oxidative stress damage, leading to or exacerbating skin problems such as dandruff, acne, and the like. Therefore, an ideal rinse-off personal care product should not only remove dust and dirt, but should also possess the ability to effectively clean unsaturated fatty acids. The cleaning products currently on the market generally rely on surfactant systems. Conventional anionic surfactants (e.g., sodium laureth sulfate, SLES) have better cleansing power on unsaturated fatty acids, but are more irritating and can damage skin barrier after long term use. To reduce irritation and improve system viscosity, mild zwitterionic surfactants (e.g., cocamidopropyl betaine, CAPB) are often formulated. However, zwitterionic surfactants are generally less effective at cleaning unsaturated fatty acids, and their large addition can significantly impair the cleaning effect of the overall formulation on the target lipid. To solve the above contradiction, the prior art has attempted several methods, namely, firstly, to reduce or avoid the use of nonionic surfactants, which would sacrifice thickening and mildness of the system, resulting in poor formulation stability, and secondly, to add specific emulsifiers (such as polyglycerol-10 myristate) to enhance emulsified cleansing of lipids, but this method tends to inhibit product foaming and may excessively clean structural lipids between skin cells, which is also detrimental to skin health. Therefore, a new technical scheme is needed to be developed in the field, and the cleaning capability of unsaturated fatty acid on the surface of skin can be effectively improved on the premise of keeping good foam, mildness and formula stability of the product. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a novel skin cleaning composition. The composition can remarkably improve the cleaning efficiency of unsaturated fatty acids (particularly oleic acid and squalene) while ensuring the mildness and good use feeling of the product through the synergistic effect of specific components. In order to achieve the above purpose, the invention adopts the following technical scheme: In one aspect, the present invention provides a composition for skin cleansing comprising a glycolipid and a laureth carboxylic acid surfactant in a mass ratio of 3:1 to 1:3, in which ratio the two exhibit optimal synergy. Further, the glycolipid is preferably sophorolipid (Sophorolipid). Sophorolipids are biosurfactants of natural origin, with excellent surface activity and biocompatibility. Further, the laureth carboxylic acid surfactant refers to carboxylic acid or carboxylate surfactant obtained by ethoxylation and carboxymethylation of laurinol and ethylene oxide. More preferably, the laureth carboxylic acid surfactant is laureth-5 carboxylic acid. Laureth carboxylic acid combines the cleaning ability of anionic surfactant and the mildness brought by polyether chain, and is a mild anionic/zwitterionic modified surfactant. The compositions of the present invention may further comprise anionic surfactants conventional in the art to provide basic cleaning power and rich lather. Exemplary anionic surfactants include, but are not limited to, sodium laureth sulfate (SLES), sodium Laurylsulfate (SLS), sodium cocoyl methyl taurate, and the like. The compositions of the present invention may also further comprise zwitterionic surfactants to further enhance the mildness and viscosity of the system. Exemplary zwitterionic surfactants include, but are not limited to, cocamidopropyl betaine (CAPB), sodium lauroyl amphoacetate (Sodium Lauroamphoacetate), disodium cocooyl amphodiacetate (Disodium Cocoamphodiacetate), and the like. The compositions of the present invention are typically formulated as aqueous systems and can be formulated into a variety of rinse-off personal care products such as facial cleansers, shampoos, body washes, hand washes, and the like. In another aspect, the present invention provides the use of the above composition in the manufacture of a rinse-off personal care product for cleansing skin unsaturated fatty acids. The unsaturated fatty acid is preferably oleic acid and/or squalene. In yet another aspect, the present invention provides the use of the above composition in the preparation of a rinse-off personal care product having reduced skin irritation. The invention h