Colloidal stable vinyl halide polymerizations with mercaptan...

Details Colloidal stable vinyl halide polymerizations with mercaptan... Colloidal stable vinyl halide polymerizations with mercaptan...

C - Chemistry, Metallurgy

08

F

400/109, 400/205

C08F 114/00 (2006.01) C08F 14/06 (2006.01)

Patent

CA 1287436

ABSTRACT OF THE DISCLOSURE Polymers of vinyl halides having low molecular weights, good particle characteristics, and improved melt flow are made by aqueous polymerization utilizing an effective amount of a mercaptan as a chain transfer agent, wherein the mercaptan chain transfer agent is mixed with at least one material which is non-polymerizable with vinyl chloride and wherein said non-polymerizable material is substantially insoluble in water and is miscible with said mercaptan to form a chain transfer composition, and said chain transfer composition is added before the start of the polymerization while maintaining colloidal stability.

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