METHOD FOR POLYVINYL CHLORIDE PRODUCTION Russian patent published in 2006 - IPC C08F114/06 C08F16/06 

FIELD: chemical industry, high-molecular chemistry.

SUBSTANCE: polyvinyl chloride is obtained by vinyl chloride suspension polymerization in presence of oil soluble initiator and stabilizing system containing 0.1 % (based on polyvinyl chloride mass) of 2,6-di-tert-buthyl-4-methylphenol and 0.003-0.006 % mixture of oxyethylated C₇-C₁₀-alkylphenols and optionally 0.07-0.35 % of calcium stearate, wherein 2,6-di-tert-buthyl-4-methylphenol is supplied into reaction mixture before vinyl chloride feeding, and mixture of oxyethylated C₇-C₁₀-alkylphenols and optionally calcium stearate are added in form of homogenous suspension obtained by blending with water after pressure drop by 0.05-0,1 MPa.

EFFECT: polyvinyl chloride of improver thermal stability and increased environmental and sanitary safety.

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