05.09.24
US Patent No. 11,975,087 B2 (Aixing Fan, Nadia Soliman, Thomas Boyd, Amira Khan, Hayoun Jung, Piscataway); Colgate-Palmolive Company patented a method for preventing lipid peroxidation of skin. The method comprises: contacting a personal care composition comprising a cosmetically acceptable carrier and a surfactant system comprising at least one amphoteric surfactant and at least one anionic surfactant with the skin.
The amphoteric surfactant is a betaine-based surfactant selected from the group consisting of cocodimethylcarboxymethyl betaine, cocamidopropyl betaine, lauryldimethylcarboxymethyl betaine, lauryldimethylcarboxyethyl betaine, cetyldimethylcarboxymethyl betaine, lauryl-bis-(2-hydroxyethyl)carboxymethyl betaine, oleyldimethylgammacarboxypropyl betaine, lauryl-bis-(2-hydroxypropyl)-carboxyethyl betaine, and combinations thereof.
The anionic surfactant comprises an alpha olefin sulfonate, and wherein the alpha olefin sulfonate comprises from about 8 to about 20 carbon atoms per molecule, or from about 14 to about 16 carbon atoms per molecule.
The carrier comprises a thickener, wherein the thickener comprises a polymer, wherein the polymer is poloxamer poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol) block copolymer (PEG-PPG-PEG).
The amphoteric surfactant is a betaine-based surfactant selected from the group consisting of cocodimethylcarboxymethyl betaine, cocamidopropyl betaine, lauryldimethylcarboxymethyl betaine, lauryldimethylcarboxyethyl betaine, cetyldimethylcarboxymethyl betaine, lauryl-bis-(2-hydroxyethyl)carboxymethyl betaine, oleyldimethylgammacarboxypropyl betaine, lauryl-bis-(2-hydroxypropyl)-carboxyethyl betaine, and combinations thereof.
The anionic surfactant comprises an alpha olefin sulfonate, and wherein the alpha olefin sulfonate comprises from about 8 to about 20 carbon atoms per molecule, or from about 14 to about 16 carbon atoms per molecule.
The carrier comprises a thickener, wherein the thickener comprises a polymer, wherein the polymer is poloxamer poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol) block copolymer (PEG-PPG-PEG).