Preparation of mixed crystals and solid solutions of...

Details Preparation of mixed crystals and solid solutions of... Preparation of mixed crystals and solid solutions of...

C - Chemistry, Metallurgy

09

B

C09B 57/00 (2006.01) C08K 5/3415 (2006.01) C09B 67/22 (2006.01)

Patent

CA 2185875

A process for the preparation of mixed crystals of 1,4-diketopyrrolo[3,4-c]pyrroles, consisting of 1 mol each of two different compounds of formula Image (I), by heating a corresponding mixture in solid form to the temperature range from 220 to 380°C. A and B are, for example, each a group of formula Image or Image , wherein R1 and R2 are each independently hydrogen, chloro, bromo, C1-C4alkyl, C1- C6alkoxy, C1-C6alkylamino, phenyl or -CN, G is -O-, -NR7-, -N=N- or -SO2-, R3 and R4 are hydrogen, and R7 is hydrogen, methyl or ethyl. The mixed crystals and solid solutions obtained are excellently suited for pigmenting high molecular weight material.

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