WATERPROOFING COATING COMPOSITIONS

摘要

A coating composition comprises an emulsion copolymer of a monomer mixture comprising at least one vinyl ester, ethylene, and a stabilizing system. The stabilizing system comprises at least one polyvinyl alcohol. The monomer mixture comprises from 60 to 82 wt % of the at least one vinyl ester and from 18 to 40 wt % of the ethylene based on the total weight of monomers in the mixture. The stabilizing system comprises from 1 to 5 wt % of at least one medium molecular weight polyvinyl alcohol and at least one low molecular weight polyvinyl alcohol. The emulsion copolymer has a solids content from 50% to 60% and a viscosity ranges from 500 to 6,000 mPa·s. and a formaldehyde content of less than 10 ppm as determined by HPLC.

主权项

1. A coating composition comprising:
an emulsion 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 and at least one low molecular weight polyvinyl alcohol, 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 emulsion copolymer has a solids content from 50% to 60% and a viscosity range from 500 to 6,000 mPa·s.; and(d) the emulsion copolymer has a formaldehyde content of less than 10 ppm as determined by HPLC.