申请人:Ciba Specialty Chemicals Holding Inc.
公开号:EP0962499A2
公开(公告)日:1999-12-08
A process is disclosed for the direct preparation of pigmentary 1,4-diketopyrrolo-[3,4c]pyrroles of the formula (I)
wherein each of R1 and R2 independently of the other is an isocyclic or heterocyclic aromatic radical, which process comprises heating an appropriate molar ratio of a disuccinate with a nitrile of the formula (II)
R1-CN (II)
or of the formula (III)
R2-CN (III)
or with mixtures of said nitriles, in an organic solvent and in the presence of a strong base and an effective amount of a selected particle growth inhibitor of formula (IV)-(X), and then obtaining the compound of formula (I) from the reaction product by protolysis. The process yields pigmentary 1,4-diketopyrrolo-[3,4-c]pyrroles directly, i.e., without the need for additional particle-size reducing aftertreatments. Also disclosed is a composition comprising a pigmentary 1,4-diketopyrrolo-[3,4-c]pyrrole and the particle growth inhibitor. These pigment compositions are useful for pigmenting high molecular weight organic materials.
本发明公开了一种直接制备式(I)的颜料型 1,4-二酮吡咯并[3,4c]吡咯的工艺,其中 R1 和 R2 各自独立地为异环或杂环芳香基。
其中 R1 和 R2 各自独立地为异环或杂环芳香基,该工艺包括加热适当摩尔比的二丁二酸酯和式 (II) 的腈
R1-CN (II)
或式 (III)
R2-CN (III)
或上述腈类的混合物,在有机溶剂中,在强碱和有效量的所选的式 (IV)-(X) 颗粒生长抑制剂存在下,然后通过原分解从反应产物中获得式 (I) 化合物。该工艺可直接得到色素型 1,4-二酮吡咯并[3,4-c]吡咯,即无需额外的粒径减小后处理。此外,还公开了一种由颜料 1,4-二酮吡咯-[3,4-c]吡咯和颗粒生长抑制剂组成的组合物。这些颜料组合物可用于高分子量有机材料的颜料化。