POLYMERIC COMPOSITION Russian patent published in 1997 - IPC

FIELD: composition of fireproof polyvinyl chloride based polymeric composition. SUBSTANCE: polymeric composition comprises (wt parts): 100 suspension polyvinyl chloride; 55-65 ester plasticizer; 4-8 lead stabilizer; 80-130 antipyrene smoke suppressor comprising 15-34 wt parts of aluminium oxide trihydrate or magnesium oxide hydrate or mixture thereof comprising (wt%): 20-50 magnesium oxide hydrate; 56.85 calcium carbonate; 7-8 arsenic trioxide; 1.5-2 zinc oxide; 0.5-1 boric acid, and additionally 0.1-1 polypropylene glycol diether or 0.5-1.5 oligomer of alphaolefines of 140-240 C. Evolution of HCl during combustion is 6.9-8% oxygen index is 32-33% smoke formation coefficient during combustion is 310-330 m²•kg⁼¹. EFFECT: improved properties. 1 tbl