Patent ID: 7029502
Filing Date: 2006-04-18
Classification: C09B,Y10S

Abstract:
1. An azo dye of formula wherein D is 2-trifluoromethyl-4-nitrophenyl, 2-cyano-4-nitrophenyl, 2-trifluoromethylphenyl, 2-trifluoromethyl-4-chlorophenyl, 2-cyano-4-nitro-6-chlorophenyl, 2-trifluoromethyl-4-nitro-6-bromophenyl, 2-phenoxysulfonylphenyl, 2-cyano-4-nitro-1-naphthyl, 2-nitro-4-phenylaminocarbonylphenyl, 2-(N-phenyl-N-ethylaminosulfonyl)phenyl, 2-nitro-4-phenoxysulfonylphenyl, 2-chloro-4-methylsulfonylphenyl, 2-phenylsulfonylphenyl, 2-nitro-4-methylsulfonylphenyl or 3,5-dicyano-4-methyl-2-thienyl and R