Vinyl acetate ethylene copolymer emulsions stabilized with poly(ethylene glycol)/poly(vinyl alcohol)blend

摘要

The present invention provides for the production of stable aqueous dispersions of vinyl acetate-ethylene copolymers, preferably at high solids, i.e., greater than 65 wt%, preferably 70% which are useful as adhesives. The vinyl acetate-ethylene copolymer is comprised of polymerized units of vinyl acetate and ethylene in approximately 60-95 wt% and 5-40 wt% respectively. The copolymers are prepared by the emulsion copolymerization of vinyl acetate and ethylene monomers in the presence of a stabilizing system consisting essentially of (1) a poly(vinyl alcohol) which is 75-99+ mole% hydrolyzed and has an average degree of polymerization ranging from 100-2200 and (2) a polyethylene glycol having a number average molecular weight of from 200 to 20,000.