Patent ID: 8293825

Claim:
A method of producing a coating material comprising blending a polymer dispersion (PD) comprising: i) at least one polymer (P) obtained by free-radical emulsion polymerization of at least one ethylenically unsaturated monomer (M1) and at least one monomer (M2) different from (M1) and selected from the group consisting of esters of phosphoric acid with unalkoxylated or alkoxylated hydroxyalkyl(meth)acrylates and esters of phosphoric acid with unalkoxylated or alkoxylated hydroxyalkyl(meth)acrylates; and ii) at least one emulsifier (E) selected from the group consisting of compounds of formula (I) R 1 —O-(AO) m —P(═O)(OR 2 )(OH) (I), wherein m is an integer from 0 to 20, AO is alkyleneoxy, R 1 is C 8 -C 30 alkyl, and R 2 is H or a group -(AO) m —R 2a , in which R 2a is as defined for R 1 , and AO and m are defined as above, and the salts of the compounds of formula (I), with a pigment paste or water, wherein (M1) comprises exclusively monomers selected from principal monomers (M1.a) and secondary monomers (M1.b), wherein (M1) comprises at least 50% by weight, based on a total weight of said monomers (M1) of principal monomers (M1.a) and less than 50% by weight based on the total weight of monomers (M1) of secondary monomers (M1.b)) wherein principal monomers (M1.a) are a mixture of n-butyl acrylate with methyl methacrylate, and secondary monomers (M1.b) are selected from acrylic acid, methacrylic acid, acrylamide, methacrylamide and a mixture thereof.