Process for the preparation of highly chromatic perylene...

Details Process for the preparation of highly chromatic perylene... Process for the preparation of highly chromatic perylene...

C - Chemistry, Metallurgy

09

B

C09B 57/08 (2006.01) C09B 67/22 (2006.01)

Patent

CA 2291511

This invention relates to a process for preparing perylene pigment compositions by reaction of (a) a perylene tetracarboxylic compound; (b) about 0.01 to about 20% by weight, relative to the perylene tetra-carboxylic compound, of a non-pigmentary cyclic anhydride or imide of formula (I) (see formula I) wherein W is O or NR1 (where R1 is hydrogen, a metal, or optionally substituted alkyl, cycloalkyl, aralkyl, or aryl), R2, R3, and R4 are various combinations of substituents and/or fused-on rings, and the dotted line is an optional double bond representing R2-C=C-R3; (c) ammonia or a primary alkyl, aralkyl, or aryl amine; optionally in the presence of (d) a solvent and/or (e) one or more dispersants.

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