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

Claim 2:
3. The process according to claim 2, wherein the polymeric dispersant (PD) has at least one structural unit of general formulae (Ia), (Ib), (Ic) or (Id):, in which
R1 is H or an unbranched or branched C1-C4-alkyl group, CH2COOH or CH2CO—X—R3;
X is NH—(CnH2n) or O—(CnH2n) with n=1, 2, 3 or 4 or is a chemical bond, wherein the nitrogen atom or the oxygen atom is bonded to the CO group;
R2 is OM, PO3M2 or O—PO3M2; with the proviso that X is a chemical bond when R2 is OM;
R3 is PO3M2 or O—PO3M2;, in which
R3 is H or an unbranched or branched C1-C4-alkyl group;
n is 0, 1, 2, 3 or 4;
R4 is PO3M2 or O—PO3M2;, in which
R5 is H or an unbranched or branched C1-C4-alkyl group;
Z is O or NR7; and
R7 is H, (CnH2n)—OH, (CnH2n)—PO3M2, (CnH2n)—OPO3M2, (C6H4)—PO3m2 or (C6H4)OPO3M2,
n is 1, 2, 3 or 4;, in which
R6 is H or an unbranched or branched C1-C4-alkyl group;
Q is NR7 or O;
R7 is H, (CnH2n)—OH, (CnH2n)—PO3M2, (C2H2n)—OPO3M2, (C6H4)—PO3M2 or (C6H4)—OPO3M2,
n is 1, 2, 3 or 4; and
where each M is independently H or one cation equivalent.