Patent ID: 7193008
Filing Date: 2007-03-20
Classification: C08F,C09D

Abstract:
1. Liquid concentrate of colorless mineral fillers which can be used to manufacture paints, said concentrate containing an aqueous or organic solvent, mineral filler particles and a grafted copolymer containing at least three sequences of different chemical nature, comprising at least one anchoring sequence for anchoring onto the solid mineral filler particles, onto which at least one anchoring sequence are grafted at least one sequence of a hydrophobic nature and at least one sequence of a hydrophilic nature, said concentrate comprising a dry extract of said mineral fillers of 65% or more by weight of said liquid concentrate, and said copolymer comprising: 1) 5 to 40 weight % of said anchoring sequence consisting of a linear copolymer formed from at least two separate monomer units containing: a) said first monomer units comprising basic nitrogenous groups formed from one or more compounds selected from the group consisting of vinylpyridine and aminoalkyl(meth)acrylate having following formula (1):  in which R b) said second monomer units of the anchoring sequence containing a monomer having following formula (II):  in which: –R the weight content of said first monomer units relative to said second monomer units being 40 to 60%.