Patent ID: 6143068
Filing Date: 2000-11-07
Classification: C07D,C09B

Abstract:
A process for preparing a perylene pigment composition comprising reacting(a) a perylene tetracarboxylic compound having the formula ##STR10## wherein E.sup.1 and E.sup.3 are independently OR or NR'R"" and E.sup.2 and E.sup.4 are independently OR, or E.sup.1 and E.sup.2 together are O or NA.sup.1 and E.sup.3 and E.sup.4 together are O or NA.sup.2,each R is independently hydrogen, a metal or ammonium cation, C.sub.1 -C.sub.6 alkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl,each R' and R"" is independently hydrogen, C.sub.1 -C.sub.6 alkyl, or C.sub.7 -C.sub.16 aralkyl,A.sup.1 and A.sup.2 are independently hydrogen, a metal, C.sub.1 -C.sub.6 alkyl or substituted C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.8 cycloalkyl or substituted C.sub.5 -C.sub.8 cycloalkyl, C.sub.7 -C.sub.16 aralkyl or substituted C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl or substituted C.sub.6 -C.sub.10 aryl,B is C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, a sulfonyl group, amino, ammonium, hydroxy, nitro, or halogen, andp is zero or an integer of from 1 to 8;(b) about 0.01 to about 20% by weight, relative to the perylene tetracarboxylic compound, of a non-pigmentary cyclic anhydride having the formula ##STR11## W is O, and any two adjacent R.sup.4, R.sup.5, R.sup.6, and R.sup.7 groups taken together form a fused-on ring and/or a group represented by the formula ##STR12## and the remaining R.sup.4, R.sup.5, R.sup.6, and/or R.sup.7 groups are independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, a sulfonyl group, amino, ammonium, hydroxy, nitro, or halogen;(c) ammonia or a primary amine having the formula R.sup.A --NH.sub.2 wherein R.sup.A is C.sub.1 -C.sub.6 alkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl;(d) optionally, a solvent; and(e) optionally, one or more additives.