| abstract |
PURPOSE: To obtain a specified mollar weight of copolymer being effective to the dispersion of a pigment to an organic solvent, which consists of a copolymer provided with an acryl acid ether kind block and plural pendant ion parts and an acryl acid esther block copolymer. n CONSTITUTION: The target dispersant is obtained by mixing (A) 0.1-50 wt.% block copolymer which is provided with nearily 200-10000 average molelar weight, is provided with at least two pendant ion parts prepared from more than one kind monomer consisting of (meth)acryl acid ester which is expressed by a formula [(R is 1-20C alkyl or alkylether) and the formula II, is expressed by the formula III (A is N, P or S; R is 1-20C alkyl, alkylether or phenyl, etc.; m is 2 and 3) and adopting an ethylenically unsaturated unit as a backbone with (B) 99.9-50 wt.% block copolymer which is provided with nearly 500-100000 average molar weight and is prepared from a compound, etc., expressed by the formulas I and II. n COPYRIGHT: (C)1989,JPO |