VINYL CHLORIDE POLYMERIZATION INITIATOR PREPARATION METHOD Russian patent published in 2006 - IPC C08F4/38 C08F114/06 

FIELD: organic synthesis and polymerization processes.

SUBSTANCE: invention relates to preparation of peroxide vinyl chloride polymerization initiators and comprises initial reaction of mixture of substituted and non-substituted alcohols with phosgene followed by treatment of phosgenation products with sodium peroxide and subsequent isolation of final product, which may be accomplished by adding a solvent such as hexane. Non-substituted alcohols are selected from various fractions of synthetic fatty alcohols and substituted alcohols are selected from ethylene glycol monoethers, synthetic fatty alcohols/ethylene glycol monoethers molar ratio being 1:(.25-4) and molar ratio of phosgene to mixture of alcohols and ethylene glycol monoethers (0.75-1.1):1. Reaction of above mixture with phosgene is conducted at temperature from -10 to 8°C for 2-6 h followed by gradual temperature rise to 40-55°C. Treatment of phosgenation products with sodium peroxide is conducted at temperature from -10 to 5°C and weight ratio of phosgenation products to sodium peroxide (3.5-10):1. Resulting multicomponent initiating modifying system contains initiators and additives providing uniform and high rate of suspension vinyl chloride polymerization to produce polymer with high temperature resistance, high homogeneity of particles regarding granulometric composition, density, and structure, and improved workability.

EFFECT: accelerated suspension polymerization of vinyl chloride and improved characteristics or resulting polymer.

1 dwg, 6 ex