Patent ID: 9663678
Date: 2017-05-30
CPC Classifications: C08L,C09D

Claim:
1. A coating composition comprising: an aqueous dispersion of a copolymer of a monomer mixture comprising at least one vinyl ester, ethylene, and a stabilizing system comprising at least one polyvinyl alcohol, wherein: (a) the monomer mixture comprises from 60 to 82 wt % of at least one vinyl ester and from 18 to 40 wt % of ethylene based on the total weight of monomers in the mixture; (b) the stabilizing system comprises at least one medium molecular weight polyvinyl alcohol having a Hoppler viscosity of from 20 to 36 mPa·s at 25° C. and at least one low molecular weight polyvinyl alcohol having a Hoppler viscosity of from 3.0 to 5.4 mPa·s at 25° C., wherein the medium molecular weight polyvinyl alcohol is present in an amount from 1 to 5 wt % based on the total weight of monomers in the mixture; (c) the dispersion has a polymeric solids content from 50% to 60% and a Brookfield viscosity range from 500 to 6,000 mPa·s at 25° C.; (d) the dispersion has a formaldehyde content of less than 10 ppm as determined by HPLC, and (e) the dispersion further comprises a filler composition comprising cement.