SUSPENSION POLYVINYL CHLORIDE COMPOSITION Russian patent published in 1995 - IPC

FIELD: preparation of filled polymeric compositions based on plasticized polyvinyl chloride having reduced evolution of hydrogen chloride and smoke formation during combustion. SUBSTANCE: said compositions are intended for manufacturing insulation and envelops for wires and cables. The invention makes it possible to increase elongation by 25 % when the film breaks after thermal ageing reduce hydrogen chloride evolution by 10-20 % and smoke formation by 1.6 times due to the fact that the composition comprises (wt parts): 4-12 antimony trioxide; 60-120 calcium carbonate; 60-120 aluminium oxide, the composition also comprises 60-100 an ester plasticizer; 6-8 a thermal stabilizer containing lead salts; 2-4 a calcium stearate lubricant; 2-10 zinc oxide; and 0.1-1.0 boric acid. EFFECT: improved properties of the composition. 1 tbl