Company News, Patents

Hair Dye Patented by Kao

Patent No. US 6,533,823 B2: Kao Corp., Tokyo, patented a hair dye composition comprising a hydrolyzate of a lower alkyl vinyl ether/maleic anhydride copolymer partially crosslinked with a terminally unsaturated diene compound, or a monoalkyl ester of the hydrolyzate; acidic dye and solvent.

Add us as a preferred source on Google

Get the latest Happi news, insights and analysis in your Google Search and AI experiences.

Keep Up With Our Content. Subscribe To Happi Newsletters