| 摘要 |
1,4-Diketopyrrolo[3,4-c]pyrroles of formula (see formula I) wherein R1, R2, R3 and R4 are each independently of one another hydrogen, Cl , Br, CH3, OCH3, CN or phenyl; and at least one of the substituents R1, R2, R3 and R4 i s a group -O-(CH2)n X of -O(CH2CH2O)p CH2CH2X wherein n is an integer from 2 to 12, and p is an integer from 1 to 3, X is a heterocyclic radical selected from the group consisting of imidazolyl , pyrazolyl, triazolyl, piperazinyl, pyridinyl, pyrrolyl, thiazolyl, oxazolyl, benzoxazolyl, indolyl, benzthiazolyl, benzimidazolyl, benzotriazolyl, morpholinyl, piperidinyl and pyrrolidinyl, which radical is unsubstituted or substituted by one or two methyl groups, o r is a group -NR5R6 or -N[(CH2)n-NR5R6]2, wherein R5 and R6 are each independently of the other hydrogen, C1-C6alkyl or C5- C6cycloalkyl. Pigment compositions comprising a minor amount of said compounds and diketopyrrolopyrrole pigments have excellent rheological and colouristic properties, especially in paint systems and in printing inks.
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