Process for producing polyvinyl chloride

Details Process for producing polyvinyl chloride Process for producing polyvinyl chloride

C - Chemistry, Metallurgy

08

F

402/395, 402/546

C08F 2/18 (2006.01) C08F 14/06 (2006.01)

Patent

CA 1110397

ABSTRACT OF THE DISCLOSURE: The invention is concerned with a process for the production of polyvinyl chloride by suspension polymerization of vinyl chloride monomer, alone or in mixture with other copolymerizable monomers, in a medium consisting essentially of water and containing a water-soluble suspending agent. The process of the invention is characterized in that the polymeriza- tion is conducted in the presence of polyvinyl acetate having an average molecular weight between 10,000 and 30,000, and being partially hydrolyzed so that its saponification number is between 300 and 600. The invention enable one to produce a product having high porosity and high uniformity in the ganulo- metric distribution of the particles, which permits almost complete removal of residual monomer in the final stripping stage.

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