Pigment preparation with perylene derivatives as dispersants

Pigment preparations comprising

• (a) at least one organic pigment;
• (b) at least one perylene derivative of the general formula I ##STR5## where A is a bivalent radical --O--, --CH.sub.2 -- or --NR.sup.1 -- wherein R.sup.1 is:
• hydrogen;
• C.sub.1 -C.sub.22 -alkyl;
• C.sub.5 --C.sub.8 -cycloalkyl;
• aryl which may be monosubstituted or poly-substituted by halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy and/or phenylazo;
• B.sup.1 and B.sup.2 are independently of each other a chemical bond or a bivalent radical --O--, --CH.sub.2 --, --NR.sup.2 --, --S--, --CO--, --SO.sub.2 -- or --SO.sub.2 --NH-- wherein R.sup.2 is hydrogen or C.sub.1 -C.sub.6 -alkyl;
• L.sup.1 and L.sup.2 are independently of each other a chemical bond, phenylene or C.sub.1 -C.sub.8 -alkylene;
• X is --SO.sub.3.sup..crclbar. Ka.sup..sym. wherein Ka.sup..sym. is:
• H.sup..sym. or the equivalent of a metal cation;
• an ammonium cation .sup..sym. N(R.sup.3).sub.4 wherein the radicals R.sup.3, which can be identical or different, have the following meanings:
• hydrogen;
• C.sub.1 -C.sub.30 -alkyl or C.sub.3 -C.sub.30 -alkenyl wherein the carbon chain may in each case be interrupted by one or more groups --O--, --S--or --NR.sup.2 -- and which may each be substituted by C.sub.1 -C.sub.6 -alkoxy, amino, hydroxyl and/or carboxyl, and wherein two of the alkyl or alkenyl radicals R.sup.3 may also be joined together to form a 5- to 7-membered ring which contains the nitrogen atom with or without further hereto atoms;
• C.sub.5 -C.sub.8 -cycloalkyl or phenyl which may each be substituted by C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, amino, halogen, hydroxyl and/or carboxyl, and wherein the carbon skeleton of the cycloalkyl radicals R.sup.3 may also be interrupted by one or more groups --O--, --S--or --NR.sup.2 --;
• Y is --CO.sub.2 Ka.sup..sym. ;
• Z is chlorine or bromine;
• m is from 0 to 4, the m>1 radicals --B.sup.1 L.sup.1 X being identical or different;
• n is 0 or 1, the sum (m+n) being from 1 to 4;
• and
• p is from 0 to 4, the p>1 radicals Z being identical or different;
• as dispersant;
• and
• (c) optionally, one or more additives to improve pigment wetting or dispersion or as a plasticizer or as a film former.