| 摘要 |
In a vinyl acetate-ethylene copolymer emulsion prepared by the aqueous emulsion copolymerization of vinyl acetate and ethylene in the presence of a polyvinyl alcohol stabilizing system, the improvement which comprises a vinyl acetate-ethylene copolymer emulsion prepared in the presence of a stabilizing system consisting essentially of: (a) 0.2 to 1.5 wt% low molecular weight, partially hydrolyzed polyvinyl alcohol, (b) 0.5 to 2.5 wt% medium molecular weight, partially hydrolyzed polyvinyl alcohol, and (c) 1 to 4 wt% medium molecular weight and/or high molecular weight, fully hydrolyzed polyvinyl alcohol, the weight percentages based on vinyl acetate monomer. |
