| abstract |
PROBLEM TO BE SOLVED: To provide a vinyl alcohol polymer and composition excellent in stability, water resistance, gas barrier property, water vapor barrier property, low-temperature storage stability of an aqueous solution and biodegradability. SOLUTION: The content of an ethylene unit is 2 to 19 mol%, A vinyl alcohol polymer having a degree of polymerization of 200 to 2000, a degree of saponification of 80 to 99.99 mol%, and a total content of carboxyl groups and lactone rings of 0.02 to 0.4 mol%. |