METHOD FOR PRODUCING POLYVINYL ALCOHOL-BASED RESIN HAVING 1,2-DIOL STRUCTURE IN SIDE CHAIN

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a polyvinyl alcohol resin which is small in a polymerization degree distribution and a modification degree distribution and contains a 1,2-diol structure in a side chain. SOLUTION: Vinyl ester monomers and monomers expressed by general formula (1) are copolymerized in the presence of a polymerization catalyst in a solvent, wherein the monomers are continuously or intermittently added to the polymerization system and then the obtained copolymer is saponified. COPYRIGHT: (C)2009,JPO&INPIT