Patent ID: 9617447
Date: 2017-04-11
CPC Classifications: B05D,C04B,C08F,C09D,E04D,Y10T

Claim:
1. A method of coating a metal sheet, comprising: coating the surface of the metal sheet with an aqueous multistage polymer dispersion obtained by free-radically initiated aqueous emulsion polymerization, wherein the aqueous multistage polymer dispersion comprises a soft phase, a hard phase and a hard-to-soft stage ratio of 25% to 95% by weight to 75% to 5% by weight, wherein the soft phase, as a first stage has a glass transition temperature (Tg) of −30 to 0° C., wherein the hard phase, as a second stage, has a glass transition temperature of 20 to 60° C., and wherein the aqueous multistage polymer dispersion comprises at least one monomer of the general formula I: in which: n=0 to 2, R1, R2, R3=independently of one another hydrogen or methyl group, X═O or NH, and Y═H, alkali metal, NH