Pigment dispersants, their production process, and their use

Details Pigment dispersants, their production process, and their use Pigment dispersants, their production process, and their use

C - Chemistry, Metallurgy

09

B

C09B 67/40 (2006.01) B01F 17/52 (2006.01) C08J 3/03 (2006.01) C08F 265/02 (2006.01)

Patent

CA 2634451

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(C2-6-alkylene glycol) chains or mono(C1-22-alkyl) ether chains of said glycol, said poly(C2-6-alkylene glycol) chains or mono(C1-22-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.

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