Patent ID: 6099636
Filing Date: 2000-08-08
Classification: C09B,C09D

Abstract:
A coated pigment comprising N,N'-dimethylperylene-3,4,9,10-tetracarboxylic diimide obtained by either (1A) coating the diimide, suspended in an aqueous medium, with a carboxyl-carrying resin in the presence of 3,4-dicarboximidoperylene-9-sulfonic acid or salts thereof and with a C.sub.8 -C.sub.18 -alkyl- or -alkenylamine, to form a coated diimide, or (1B) said coating is coupled with the synthesis of the diimide, to form a coated diimide, followed by (2) isolating and drying the coated diimide and (3) then subjecting the isolated and dried coated diimide to dry milling.