METHOD FOR SUSPENSION POLYMERISATION OF VINYL CHLORIDE Russian patent published in 2011 - IPC C08F2/18 C08F14/06 C08F114/06 

FIELD: chemistry.

SUBSTANCE: method for suspension polymerisation of vinyl chloride is realised in the presence of an initiator, a complex dispersing system and additive agents to obtain polymer particles with relatively high packed density and porosity, improved thermal stability and processability. The polymerisation process takes place in the presence of a complex dispersing system consisting of a protective colloid - a combination of polyvinyl alcohols - partially hydrolysed polyvinyl acetate derivatives having degree of hydrolysis of 69.0-73.5% and 78-82%, in ratio of (1-3):(5-1) and a modifying additive - calcium salt of stearic acid, while adding the complex dispersing system to the polymerisation mixture before adding vinyl chloride.

EFFECT: obtaining vinyl chloride particles with relatively high packed density, good porosity, improved thermal stability and processability into articles using existing methods without using liquid plasticisers.

3 cl, 9 ex, 2 tbl