Patent ID: 11926715
Assignee: BASF SE
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  Y | IPC C

Claim 4:
5. The process according to claim 2, wherein the polymeric dispersant (PD) comprises at least one polymer which is a polycondensation product comprising structural units (III) and (IV):, in which
T is a substituted or unsubstituted phenyl radical, a substituted or unsubstituted naphthyl radical or a substituted or unsubstituted heteroaromatic radical having 5 to 10 ring atoms, of which 1 or 2 atoms are heteroatoms selected from N, O and S;
n is 1 or 2;
B is N, NH or O with the proviso that n is 2 when B is N and the proviso that n is 1 when B is NH or O;
A is CxH2x with x=2, 3, 4 or 5 or CH2CH(C6H5);
a is an integer from 1 to 300;
R25 is H, a branched or unbranched C1- to C10-alkyl radical, C5- to C8-cycloalkyl radical, aryl radical or heteroaryl radical having 5 to 10 ring atoms, of which 1 or 2 atoms are heteroatoms selected from N, O and S;
where the structural unit (IV) is selected from the structural units (IVa) and (IVb):, in which
D is a substituted or unsubstituted phenyl radical, a substituted or unsubstituted naphthyl radical or a substituted or unsubstituted heteroaromatic radical having 5 to 10 ring atoms, of which 1 or 2 atoms are heteroatoms selected from N, O and S;
E is N, NH or O with the proviso that m is 2 when E is N and the proviso that m is 1 when E is NH or O;
A is CxH2x with x=2, 3, 4 or 5 or CH2CH(C6H5);
b is an integer from 1 to 300;
M is independently H or one cation equivalent;, in which
V is a substituted or unsubstituted phenyl radical or a substituted or unsubstituted naphthyl radical;
R7 is COOM, OCH2COOM, SO3M or OPO3M2;
M is H or one cation equivalent;
where the phenyl, naphthyl or heteroaromatic radicals mentioned are optionally substituted by 1 or two radicals selected from R8, OH, OR8, (CO)R8, COOM, COOR8, SO3R8 and NO2; and
R8 is C1-C4-alkyl, phenyl, naphthyl, phenyl-C1-C4-alkyl or C1-C4-alkylphenyl.