VINYL ACETATE/ETHYLENE COPOLYMER EMULSIONS EXHIBITING BOTH PARTIALLY- AND FULLY-HYDROLYZED POLYVINYL ALCOHOL COMPATIBILITY

摘要

A vinyl acetate/ethylene copolymer emulsion exhibiting both partially-and fully-hydrolyzed polyvinyl alcohol compatibility which comprises an aqueous colloidal dispersion of a copolymer prepared by the emulsion polymerization of vinyl acetate and ethylene in the presence of a polyvinyl alcohol stabilizing system having an 8 to 10 mole% residual vinyl acetate content, especially comprising a mixture of a polyvinyl alcohol having a 3 to 6 mole% vinyl acetate content and a polyvinyl alcohol having a 10 to 14 mole% vinyl acetate content in a ratio that yields an average residual vinyl acetate content of 8 to 10 mole%. When blended with a partially-or fully-hydrolyzed polyvinyl alcohol to provided an adhesive composition, such compositions demonstrate an enhanced placicizer thickening.