IMPROVED PROCESS FOR MANUFACTURE OF POLYVINYL CHLORIDE

摘要

IN THE PROCESS ACCORDING TO THE INVENTION FOR THE AQUEOUS SUSPENSION POLYMERIZATION OF VINYL CHLORIDE, ALONE OR AS A MIXTURE WITH ANOTHER VINYL MONOMER, THE POLYMERIZATION INITIATOR COMPRISES AT LEAST ONE COMPOUND CHOSEN FROM DIALKYL PEROXYDICARBONATES, PEROXY-TERT-ALKANOATES AND DIACYL PEROXIDES AND USE IS MADE, AS AGENT FOR HALTING THE POLYMERIZATION, OF A MONO- OR DISUBSTITUTED HYDROXYLAMINE. THE RESINS THUS OBTAINED EXHIBIT IMPROVED COLOR AND HEAT STABILITY.