Patent ID: 6782895
Filing Date: 2004-08-31
Classification: A61K,A61Q

Abstract:
A method for lanthionizing keratin fibers comprising(a) generating hydroxide ions in a composition, said step of generating comprising combining: (i) at least one hydroxide composition comprising at least one hydroxide compound; and (ii) at least one activating composition comprising at least one complexing agent effective for dissociating said at least one hydroxide compound in sufficient quantity to effect lanthionization of said keratin fibers; (b) applying said composition comprising said generated hydroxide ions to keratin fibers for a sufficient period of time to lanthionize said keratin fibers; and (c) terminating said lanthionization, wherein said at least one complexing agent comprises at least one group chosen from groups of formula (I) and salts thereof: wherein: R1 is chosen from a carbonyl group and a thiocarbonyl group; R2 is chosen from CR groups wherein R is chosen from a direct bond to a neighboring atom, H, optionally substituted linear hydrocarbon groups, optionally substituted branched hydrocarbon groups, optionally substituted cyclic hydrocarbon groups, optionally substituted amino groups, optionally substituted thio groups, optionally substituted hydroxy groups, and halogen atoms; X1 is chosen from hydroxyl groups and thiol groups; and X2 is chosen from hydroxyl groups, amino groups, and thiol groups, provided that said at least one complexing agent is not chosen from &agr;-thio carboxylic acids.