Patent ID: 6562327
Filing Date: 2003-05-13
Classification: A45D,A61K,A61Q

Abstract:
A method for lanthionizing keratin fibers to achieve relaxation of said keratin fibers, said method comprising:generating hydroxide ions in an ionizing solvent by adding, to at least one multivalent metal hydroxide, an activating composition, wherein said activating composition comprises at least one complexing agent chosen from at least one sequestering agent, at least one chelating agent, and at least one complexing agent effective for dissociating said at least one multivalent metal hydroxide in sufficient quantity to effect lanthionization of said keratin fibers, wherein said dissociation of said at least one multivalent metal hydroxide in sufficient quantity to effect lanthionization is not driven by the production of a precipitate; forming a composition containing said generated hydroxide ions; applying said composition to keratin fibers for a period of time to lanthionize said keratin fibers; and terminating said lanthionization when the desired level of relaxation of said keratin fibers has been reached; and wherein said at least one complexing agent is not only guanidine tartrate or only guanidine phosphate or only a mixture of guanidine tartrate and guanidine phosphate.