DISPERSION STABILIZER FOR VINYL COMPOUND SUSPENSION POLYMERIZATION

摘要

A dispersion stabilizer for vinyl compound suspension polymerization with which due to excellence in dispersion stability at polymerization, there can be obtained vinyl chloride polymer particles with sharp particle size distribution and high bulk density, and with which there can be produced vinyl chloride polymer particles being less in wet foam ratio, being resistant to formation of foamy polymer or polymer scale attributed to dry foam, further being less in staining and excelling in heat resistance. There is provided a dispersion stabilizer comprised of a PVA resin of 65 to 87 mol% saponification degree having a 1,2-diol component in its side chain.