METHOD OF PRODUCING GRANULAR PLASTICISED POLYVINYL CHLORIDE COMPOSITION Russian patent published in 2009 - IPC C08L27/06 C08F14/06 

FIELD: chemistry.

SUBSTANCE: proposed is a method of producing polymers and materials based on polyvinyl chloride, used in different industries, where there is need for materials with low flammability and smoke emission, good chemical resistance, frost resistance and heat resistance. Granular plasticised polyvinyl chloride composition is produced through mixture with plasticisers, stabilisers, fillers and possibly other special additives of polyvinyl chloride with Fikentscher constant C_f=58÷76, obtained using suspension polymerisation method with 0.7÷0.9 monomer conversion, which is a white powder, consisting of porous opaque particles and characterised by specific surface area of S_s=1÷2 m²/g, and value of plasticiser mass absorption α=C_f-(38+46) g/100 PVC. The composition can also contain polyvinyl chloride suspension with Fikentscher constant C_f=35÷46.

EFFECT: obtaining granular plasticised composition with improved processing characteristics, increased harness and homogeneity.

2 cl, 3 tbl, 6 ex