PROCESS FOR PRODUCING VINYL ALCOHOL POLYMER COMPOSITION

摘要

A process for producing vinyl alcohol polymer composition comprises subjecting a solution containing a metal alkoxide or its oligomer, a vinyl carboxylate polymer, and an organic solvent to polycondensation and saponification reactions while removing low-boiling point ingredients including organic solvents. The polycondensation reaction of the alkoxide or its oligomer and the saponification of the vinyl carboxylate polymer are simultaneously conducted in the same reaction system. The amount of the alkoxide or oligomer used in the process is controlled to be 0.01 - 100 mol based on the total amount of the metallic atoms contained in the alkoxides or oligomers per 100 mol of the acyl groups originating from the vinyl carboxylate.