Process for preparing organic pigment compositions

Details Process for preparing organic pigment compositions Process for preparing organic pigment compositions

C - Chemistry, Metallurgy

09

B

C09B 48/00 (2006.01) C09B 3/14 (2006.01) C09B 47/04 (2006.01) C09B 57/04 (2006.01) C09B 67/18 (2006.01) C09B 67/22 (2006.01) C09D 7/12 (2006.01) C09D 11/00 (2006.01)

Patent

CA 2255158

This invention relates to a process for preparing pigment compositions by (a) treating an organic pigment with (1) a sterically hindered and/or bulky primary amine, and (2) a liquid in which the organic pigment is insoluble, and (b) blending the resultant surface-treated pigment composition from step (a) with a pigment derivative of formula (I) (see formula I) wherein Q represents an organic pigment moiety, X is O, S, NR1, -SO2-, -CO-, -Alk-, -Ar-, or combinations thereof, Y is -OR2, -NR3R4, or Het, Alk is C1-C5 alkylene, C2-C5 alkenylene, or C4-C5 alka-dienylene, or substituted derivatives thereof, Ar is arylene, R1, R2, R3, and R4 are independently hydrogen, C1-C6 alkyl, C5-C7 cycloalkyl, C7-C16 aralkyl, or C6-C10 aryl, Het is a heterocycle, and n is 1 to 4.

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