| 摘要 |
<p>The process comprises using a solution comprising a metal alkoxide or an oligomer thereof, a vinyl carboxylate polymer, and an organic solvent to simultaneously conduct the polycondensation reaction of the alkoxide or oligomer and the saponification reaction of the polymer in the same reaction system while removing the low-boiling ingredients including the organic solvent. In the process, the alkoxide or oligomer is used in such an amount that the amount of the metal atoms contained in the alkoxide or oligomer is 0.01 to 100 mol per 100 mol of the acyl groups of the vinyl carboxylate units contained in the vinyl carboxylate polymer. Thus, a vinyl alcohol polymer composition containing a metal oxide can be produced which can retain excellent gas-barrier properties even in a high-temperature high-humidity atmosphere or after having undergone bending and is free from unevenness of performance. Therefore, a material useful as a food packaging material, etc. is industrially advantageously produced.</p> |
