Mixed crystals and solid solutions of 1,4-diketopyrrolopyrroles

Details Mixed crystals and solid solutions of 1,4-diketopyrrolopyrroles Mixed crystals and solid solutions of 1,4-diketopyrrolopyrroles

C - Chemistry, Metallurgy

09

B

C09B 57/00 (2006.01) C07D 487/04 (2006.01) C09B 67/00 (2006.01) C09B 67/22 (2006.01)

Patent

CA 2159171

The invention relates to mixed crystals of 1,4-diketopyrrolo[3,4-c]pyrroles, consisting of 1 mol each of two different compounds of formulae Image and Image (I) (II) as well as single-phase solid solutions of two different compounds of formulae I and II, wherein the diketopyrrolopyrrole having the smaller geometrical constitution is present in an amount of 53 to 70 mol%. A and B are typically each a group of formula Image , Image , Image , Image or Image , wherein R1 and R2 are each independently of the other hydrogen, chloro, bromo, C1-C4alkyl, C1-C6alkoxy, C1-C6alkylamino or CN, G is -O-, -NR7-, -N=N- or -SO2-, R3 and R4 are hydrogen, and R7 is hydrogen, methyl or ethyl. Surprisingly, the novel mixed crystals are isomorphous with the corresponding asymmetrical diketopyrrolopyrroles of the Image type. The novel mixed crystals as well as the novel solid solutions are admirably suited for pigmenting organic material of high molecular weight.

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