Patent ID: 7816441
Filing Date: 2010-10-19
Classification: C08F

Abstract:
1. A method comprising conducting free-radically initiated aqueous emulsion polymerization or suspension polymerization in the presence of a dispersing assistant, wherein the dispersing assistant is an addition polymer A comprising in copolymerized form: 0.1% to 40% by weight of at least one C3 to C30 alkene (monomer A1), 40% to 99.9% by weight of at least one ethylenically unsaturated C3 to C6 monocarboxylic acid (monomer A2), 0% to 50% by weight of at least one ethylenically unsaturated C4 to C12 dicarboxylic acid and/or of the ethylenically unsaturated dicarboxylic monoalkyl esters or dicarboxylic anhydrides obtainable from said acid (monomer A3), and 0% to 30% by weight of at least one other ethylenically unsaturated compound which is copolymerizable with the monomers A1 to A3 (monomer A4), the amounts of monomers A1 to A4 adding up to 100% by weight.