| abstract |
1,4-diketopyrrolopyrroles of the formula <IMAGE> (I) in which R1 and R2 independently of one another are hydrogen, C12-C24alkyl, C6-C24alkyl which is interrupted one or more times by O or S, or are a group of the formula <IMAGE> in which R5 is C4-C18alkyl or C5-C10cycloalkyl, R3 is a polymerizable reactive group, R4, if R1 and R2 are hydrogen, is C6-C24alkyl which is attached directly or by way of O or S to the benzene ring and is uninterrupted or is interrupted one or more times by O or S, and R4, if R1 and/or R2 are C12-C24alkyl, is C6-C24alkyl which is interrupted one or more times by O or S or is a group <IMAGE> hydrogen, halogen, methyl, methoxy, CN or phenyl, or is the same as R3. |