IMPROVED SUSPENSION POLYMERIZATION PROCESS FOR VINYL CHLORIDE POLYMERS.

摘要

I CLAIM: 1. In an aqueous suspension process for polymerizing vinyl chloride, wherein a mixture of water, vinyl chloride, a suspending agent and a vinyl chloride-soluble polymerization catalyst are subject polymerizing conditions, the improvement which comprises ###ding less than about 1000 parts per million, based on the monomers and co-monomers of magnesium hydroxide in the mixture being normally added before the catalysis whereby polymer build-up on polymerization reactor walls is substantially reduced.