Kao's latest patents on hair care

Novel Hair Dye Method  US Patent No. 8,821,591 B2; Kao Corp., Tokyo, has patented  hair dying or bleaching method that uses an applicator. It is comprised of: composition A, which is comprised an alkali agent; composition B, which is comprised of an oxidizing agent; and composition C, which is comprised of a powdery oxidation assistant; and a hair cosmetic applicator.

The applicator has a container in which a cosmetic material is produced by mixing three compositions. The tool also has application part by which the hair cosmetic material is applied to a hair; and an extension part having a liquid-leading passage that connects the container part to the application part. The application part also has a discharge port and a comb. The comb includes a plurality of teeth that are disposed substantially annularly so as to surround the discharge port.

The method entails mixing the compositions A, B and C in the container part to produce the hair cosmetic material, supplying the hair cosmetic material to the application part through the liquid-leading passage in the extension part to the applicator part and applying the hair cosmetic material supplied to the application part to hair.

Hair Coloring Composition  US Patent No. 8,795,391 B2l; Kao Germany has patented an aqueous composition for coloring human hair, comprising at least one oxidative dye precursor; optionally at least one coupling agent and/or at least one direct dye in a cosmetically acceptable medium; at least one anionic surfactant selected from sulphate, sulphonate, carboxylate and aminocarboxylate surfactants; at least one branched fatty acid; and at least one quaternary ammonium surfactant.