Diazo compounds as photosensitive pigments

摘要

Cpds. have formula:- (where R is phenylene or lower alkylene, and X and Y are phenyl, naphthyl, alkylphenyl, or alkylnaphthyl or together form 4,4'-biphenylylene or alkylenebis-p-phenylene gps.). The dyes are used in electrophoretic copying processes.