A pigment dispersant contains (a) 5 to 30 wt % of aromatic and/or heterocyclic vinyl monomer units, (b) 10 to 30 wt % of monomer units having acid groups, (c) 40 to 80 wt % of (meth)acrylate ester monomer units, and (d) 5 to 30 wt % of monomer units having poly(C
2-6
-alkylene glycol) chains or mono(C
1-22
-alkyl)ether chains of said glycol, said poly(C
2-6
-alkylene glycol) chains or mono (C
1-22
-alkyl)ether chains having a number average molecular weight of from 150 to 1,500. A sum of the monomer units (a) to (d) amounts to 100 wt %. The pigment dispersant has an acid value of from 30 to 300 mgKOH/g, a number average molecular weight of from 5,000 to 30,000, and a content of organic compounds, boiling points of which are not higher than 250° C., of not higher than 0.2 wt %. Also disclosed are its production process, its aqueous solution and its dispersion.
一种
颜料分散剂包含(a)5至30重量%的芳香族和/或杂环
乙烯单体单元,(b)10至30重量%的具有酸基的单体单元,(c)40至80重量%的(甲基)
丙烯酸酯单体单元,以及(d)5至30重量%的具有聚(C2-6-烷基二醇)链或该二醇的单(C1-22-烷基)醚链的单体单元,所述聚(C2-6-烷基二醇)链或单(C1-22-烷基)醚链的数均分子量为150至1,500。单体单位(a)至(d)的总和为100重量%。该
颜料分散剂的酸值为30至300 mgKOH / g,数均分子量为5,000至30,000,并且有机化合物的含量,其沸点不高于250°C,不高于0.2重量%。还公开了其生产过程,其
水溶液和其分散液。