| abstract |
PURPOSE: Quinophthalone pigment of formula I (A is benzene ring which may be substituted by an non-ionizable group, B is benzene ring which may be substituted by halogen atom; X is H or halogen atom; R is aryl residue, such as phenyl, naphthyl or biphenyl, which may be substituted by non-ionizable group; R' is devalent group, such as - O -, - S -, - CH 2 -, - CO -, - SO 2 -, - NHCO-, - NHCONH-, - NHCOC 6 H 4 CONH-, or - NHCO 2 -, which may be substituted by non-ionizable group.). n COPYRIGHT: (C)1977,JPO&Japio |