| abstract |
To provide a polyvinyl alcohol resin for melt molding having high thermal stability during melt molding and excellent long-run moldability. A copolymer of a vinyl ester monomer and a compound represented by the general formula (1) is saponified. [Chemical 1] [R 1 , R 2 and R 3 each independently represent a hydrogen atom or an alkyl group; R 4 represents a C 1-3 alkylene group which may have a single bond or an alkyl group; 5 , R 6 each independently represents hydrogen or R 7 —CO— (wherein R 7 is an alkyl group)] [Selection figure] None |