Patent ID: 6503975
Filing Date: 2003-01-07
Classification: C08F,C09D

Abstract:
An emulsion useful for forming coating compositions comprising:a) an aqueous carrier; and b) a polymer mixture comprising: (1) 40-99.5% by weight of a copolymer comprising polymer compositions not encompassed by the hereinafter defined stabilizing copolymer of part (2), with a weight average molecular weight of at least 3000; and (2) 0.5-60% by weight of a stabilizing copolymer dispersed in water, said stabilizing copolymer comprising a hydrophobic portion and a hydrophilic portion, wherein said stabilizing polymer is selected from the group consisting of: (i) polymers comprising 5-95% by weight of a hydrophilic macromonomer having at least 10% by weight of an acid functional monomer and 5-90% by weight of at least one hydrophobic monomer polymerized in the presence of the macromonomer; and (ii) polymers comprising 5-95% by weight of a hydrophobic macromonomer and 5-95% by weight of a hydrophilic copolymer comprising at least 10% by weight of an acid functional monomer polymerized in the presence of the macromonomer, wherein the macromonomer comprises at least 50% by weight of monomers selected from the group consisting of methacrylate, methacrylonitrile, methacrylamide and derivatives and mixtures thereof with a weight average molecular weight of 500 to 10000 and is prepared by cobalt catalytic chain transfer polymerization.