Process for producing polyvinyl ester having a high degree of polymerization and process for producing polyvinyl alcohol having a high degree of polymerization

摘要

Process for producing polyvinyl ester having a high degree of polymerization and an intrinsic viscosity of from 15 dl g-1 to 3.2 dl g-1, and a polyvinyl ester obtained thereby. The process comprises subjecting a vinyl ester monomer to emulsion polymerization using nonionic emulsifiers nonionic-anionic emulsifiers, or anionic emulsifiers and a redox initiator at a temperature of -60 DEG to 15 DEG C.