METHOD FOR SUSPENSION POLYMERIZATION OF VINYL CHLORIDE Russian patent published in 2006 - IPC C08F114/06 C08F4/38 

FIELD: chemistry and technology of polymers.

SUBSTANCE: invention relates to a method for suspension polymerization of vinyl chloride. The polymerization reaction of vinyl chloride in an aqueous suspension is carried out in the presence of a protective colloid and peroxide initiating agent used in the amount 0.03-0.1% of monomer mass. As a initiating agent method involves using multi-component system comprising the following components, wt.-%: mixture of symmetric and non-symmetric dialkyl peroxydicarbonates, 75-82; synthetic saturated (C₅-C₂₂)-alcohols, 1-2.5; alkyl chlorides, 7.5-10; dialkylcarbonates and diethylene glycol esters, 8-14. This composition of mixture provides the constant rate of polymerization of vinyl chloride, uniform heat evolving during all process and creates the possibility for the improved rational using equipment exploited in the polymerization process, significant decreasing auto-acceleration of polymerization in the field of deep conversions, to reduce the process time, to enhance the yield and quality of polymer. All said above results to improvement of thermal stability, granulometric composition, increasing porosity of polyvinyl chloride, its improved capacity for processing and physicochemical properties of synthesized polymeric materials.

EFFECT: improved method for polymerization.

2 cl, 5 tbl, 1 dwg, 21 ex