Richard H Demarco

US Patent:

53444639, Sep 6, 1994

Filed:

May 17, 1993

Appl. No.:

8/061517

Inventors:

Alexander Chan - Mineola NY
Yuh-Guo Pan - Stamford CT
Richard Demarco - Danbury CT

Assignee:

Clairol, Inc. - New York NY

International Classification:

A61K 713

US Classification:

8408

Abstract:

2-substituted-1-naphthols when coupled with an oxidation dye precursor in an oxidative dye system produce a long lasting intense color to hair. Use of such couplers makes available to the colorist novel oxidation hair dyes which surprisingly show a color shift to the red. Dyestuffs prepared through use of the 2-substituted-1-naphthol couplers are substantially more acid-fast compared to like dyestuffs using a 1-naphthol coupler. Compositions and a method of dyeing hair are also disclosed.