METHOD OF PREPARING POLYVINYL CHLORIDE Russian patent published in 1997 - IPC

FIELD: chemistry of high molecular weight compounds. SUBSTANCE: polyvinyl chloride by suspension polymerization of vinyl chloride in the presence of oil soluble initiator and thermostabilizing system. the thermostabilizing system is combination of epoxied soya oil and triethylene glycol-bis-3-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate in amount of 0.15-0.25 % and 0.02-0.06 %, respectively based on weight of polyvinyl chloride. In order to increase thermostabilization effect, prior to addition of monomer, barium stearate is added to reaction mixture. EFFECT: more efficient preparation method. 2 cl, 1 tbl