PROCESS FOR PREPARING HEAT-RESISTANT CROSS-LINKED POLYVINYL CHLORIDE, COMPOSITION BASED ON HEAT-RESISTANT CROSS-LINKED POLYVINYL CHLORIDE

摘要

FIELD: chemistry of polymers. SUBSTANCE: claimed invention describes process for manufacturing heat resistant cross linked PVC copolymer which comprises cross linking of polymer in humid medium after polymer has been treated. The claimed process uses vinyl chloride copolymer and 0.05-10 wt% vinyl-containing alkoxysilane compound. The comonomer is preferably methacrytoxypropyl trimethoxysilane or methacryloxypropyl triethoxysilane. Cross-linking can be effected iserespective of the type of stabilizer. To prevent too early cross linking, condensation catalyst and inhibitor can also be used. EFFECT: improved properties of the heat-resistant cross-linked PVC copolymer.