VINYL ESTER/ETHYLENE COPOLYMER DISPERSIONS FOR USE IN ADHESIVE FORMULATIONS

摘要

An aqueous dispersion of a vinyl ester/ethylene copolymer is prepared by emulsion copolymerization of a monomer mixture comprising a vinyl ester, ethylene and a polyvinyl alcohol stabilizing system consisting essentially of (a) 0.5 to 3 wt % based on the total monomer weight of a first polyvinyl alcohol having a degree of hydrolysis of at least 98 mole% and (b) 1 to 4 wt % based on the total monomer weight of a second polyvinyl alcohol having a degree of hydrolysis of 85 to 90 mole % and a weight average molecular weight of at least 85,000 g/mol.