MODIFIED VINYL ALCOHOL-BASED POLYMER, DISPERSION STABILIZER FOR SUSPENSION POLYMERIZATION, AND METHOD FOR POLYMERIZING VINYL-BASED COMPOUND
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United States of America Patent
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Jun 8, 2023
app pub date -
Apr 7, 2021
filing date -
Apr 7, 2020
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Provided is a dispersion stabilizer for suspension polymerization, the dispersion stabilizer making it possible to obtain, through suspension polymerization of a vinyl compound such as vinyl chloride, resin particles having uniform particle diameters and few large particles, and also having a high porosity and a large plasticizer absorption. A modified vinyl alcohol polymer has a hydrodynamic radius (Rh) (unit: nm) that satisfies equation (1) where x is the viscosity average polymerization degree. (1): 0.186x0.542×1.30≥Rh≥0.186x0.542×1.06
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