METHOD FOR SUSPENSION POLYMERISATION OF VINYL CHLORIDE Russian patent published in 2014 - IPC C08F2/18 C08F114/06 

FIELD: chemistry.

SUBSTANCE: disclosed is a method of producing polyvinyl chloride (PVC) by polymerisation of vinyl chloride in an aqueous suspension in the presence of an initiator, a protective colloid and a complex stabilising system which includes a calcium salt of stearic acid and glycidyl esters of monoatomic and/or polyatomic alcohols when added to a polymerisation mixture before adding the monomer. The complex stabilising system which consists of a calcium salt of stearic acid and glycidyl esters of monoatomic and/or polyatomic alcohols is used in amount of 0.0792-0.1275% of the weight of vinyl chloride. The calcium salt of stearic acid is added to the polymerisation mixture in amount of 0.072-0.123% of the weight of vinyl chloride. The glycidyl esters of monoatomic and/or polyatomic alcohols are added to the polymerisation mixture in amount of 0.0045-0.0072% of the weight of vinyl chloride.

EFFECT: polymerisation of vinyl chloride using the complex stabilising system produces PVC particles with high thermal stability, good porosity and relatively high packed density; treating compositions based on PVC obtained using the disclosed method using existing methods using plasticisers produces materials with improved dielectric and physical-mechanical properties; when treatment is carried out without plasticisers, the obtained articles demonstrate high resistance to mechanical loads, thermal action and low and high temperatures.

3 cl, 7 tbl, 10 ex