Patent ID: 6716934
Filing Date: 2004-04-06
Classification: B32B,C08F,C08J

Abstract:
A method for producing an ethylene-vinyl acetate copolymer containing from 5 mol % to 60 mol % ethylene, said method comprising adding a vinyl acetate-containing material, ethylene, a polymerization initiator, a polymerization solvent comprising an aliphatic alcohol having not more than four carbon atoms and a saturated acetic ester to a polymerization vessel and copolymerizing said vinyl acetate and said ethylene at a temperature of from 30Â°C. to 150Â° C., wherein the concentration of acetaldehyde added to the polymerization vessel is not more than 200 ppm with respect to the vinyl acetate and the concentration of said saturated acetic ester added to the polymerization vessel is from 10 ppm to 1500 ppm with respect to the vinyl acetate.