VINYL RESIN PRODUCTION METHOD

摘要

Provided is a vinyl resin production method in which a dispersion stabilizer comprises: an aqueous emulsion (a) that is obtained by dispersing a polymer (A) that comprises an ethylenically unsaturated monomer unit in an aqueous medium; a PVA (B) that has a saponification degree of 65 mol% or more but less than 82 mol% and a viscosity-average degree of polymerization of 250 or more but less than 1,500; and a PVA (C) that has a saponification degree of 82 mol% or more but less than 98 mol% and a viscosity-average degree of polymerization of 1,500 or more but less than 4,000. The dispersion stabilizer comprises 7-51 mass% of the polymer (A), 40-84 mass% of the PVA (B), and 9-53 mass% of the PVA (C) with respect to the total amount of the polymer (A), the PVA (B), and the PVA (C). The use of this dispersion agent makes it possible to obtain a vinyl resin that meets the performance requirements thereof.