PROCESS FOR PREPARING GRAFTED COPOLYMER OF VINYL CHLORIDE WITH ETHYLENE-VINYL ACETATE COPOLYMER

摘要

FIELD: preparation of grafted vinyl chloride copolymers with ethylene-vinyl acetate copolymer for manufacturing film materials and for medicinal materials. SUBSTANCE: suspension copolymerization of VC with EVA at weight ratio thereof from 10-75 to 90-25, respectively, in the presence of initiator solution of di-2-ethylhexyl- or di-2-butoxyethylperoxy bicarbonate. Peroxydicarbonate is prepared directly in polymerization zone by reacting chloformate in amount of 0.14 wt part per 100 weight parts of VC with peroxide in aqueous alkaline medium at chloroformate to alkali molar ratio of 1:2. EFFECT: more efficient, preparation process. 1 tbl