Pigment composition of a modified diketopyrrolopyrrole and an aminoalkyl acrylate resin

A pigment composition comprising:

• A) a 1,4-diketopyrrolo›3,4-c!pyrrole pigment of formula ##STR10## wherein A and B are each independently of the other a group of formula ##STR11## wherein R.sub.1 and R.sub.2 are each independently of the other hydrogen, halogen, C.sub.1 -C.sub.18 alkyl or CN,
• on the particle surface of which pigment there is adsorbed
• i) 0.1-10% by weight, based on the diketopyrrolopyrrole of formula I, of a partially hydrolysed organic compound selected from the group consisting of chelates of formula ##STR12## wherein R.sub.3 is methyl or ethyl, R.sub.4 is methyl, ethyl, methoxy or ethoxy, X is halogen or C.sub.1 -C.sub.4 alkoxy, and Y is Ti or Sn, or of esters of formula
• Q(OR.sub.5).sub.4 (IV),
• wherein Q is a metal selected from the group consisting of Sn, Si, Pb, Ge, Ti or Zr, and R.sub.5 is C.sub.1 -C.sub.4 alkyl, or
• ii) 0.1-10% by weight, based on the diketopyrrolopyrrole of formula I, of a diketopyrrolopyrrole of formula ##STR13## wherein R.sub.6 is hydrogen, halogen, C.sub.1 -C.sub.4 alkyl or phenyl, and L is hydrogen, a group of formula ##EQU3## wherein M is a metal selected from the group consisting of Na, K, Mg, Ca, Sr, Ba and Al, and n is 1, 2 or 3, or L is a group N.sup.+ H(R.sub.7)(R.sub.8)(R.sub.9), wherein R.sub.7, R.sub.8 and R.sub.9 are each independently of one another hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.5 -C.sub.6 cycloalkyl, unsubstituted or C.sub.1 -C.sub.4 alkyl-substituted phenyl or benzyl, or
• iii) 0.1-10% by weight, based on the diketopyrrolopyrrole of formula I, of a diketopyrrolopyrrole of formula ##STR14## wherein R.sub.10, R.sub.11, R.sub.12 and R.sub.13 are each independently of one mother hydrogen, Cl, Br, CH.sub.3, OCH.sub.3, CN or phenyl, and at least one of R.sub.10, R.sub.11, R.sub.12 and R.sub.13 is a group
• --O(CH.sub.2).sub.m --Z or --O(CH.sub.2 CH.sub.2 O).sub.p CH.sub.2 CH.sub.2 Z
• wherein
• m is and integer from 2 to 6, and
• p is 1 or 2, and
• Z is a heterocyclic radical selected from the group consisting of imidazolyl, pyrazolyl, morpholinyl, piperidinyl, pyrrolidinyl and triazolyl,
• or is a group --NR.sub.14 R.sub.15, wherein R.sub.14 and R.sub.15 are each independently of the other hydrogen, methyl or ethyl, and
• B) 0.1-20% by weight, based on the diketopyrrolopyrrole of formula I, of an acrylic resin obtained by solution homopolymerisation of a monomer of formula ##STR15## wherein R.sub.16 is hydrogen or methyl and R.sub.17 and R.sub.18 are each independently of the other hydrogen, methyl or ethyl, and q is an integer from 1 to 6, or by solution copolymerisation of the same monomer with a monomer which is copolymerisable with said same monomer.