Ca-Fe Composite Oxide for Capturing Hydrogenchloride Evolved by PVC Combustion and Its Thermal Stability Function in PVC

Tomoyuki Imai*, Toshiki Matsui*, Yasuhiko Fujii* and Tasuku Nakai*
* Toda Kogyo Corporation
+ Correspondence should be addressed to Tomoyuki Imai:
(1-4 Meijisinkai, Otake-city, Hiroshima 739-0652 Japan)

Abstract
PVC powder added CaCO3 or Ca-Fe composite oxide were burnt and the capturing rates of hydrogenchloride by those additives were measured. The capturing rate of hydrogenchloride by CaCO3 increased with the increasing specific surface area, and the dependency of the capturing rate on a specific surface area by Ca-Fe composite oxide was also observed and those capturing rates increased to 1.5-2.1 times of the values by CaCO3. Furthermore, the capturing rate of hydrogenchloride at combustion and the thermal stability of PVC sheets in which each additive was kneaded were measured. As a result, it was confirmed that both performances of the PVC sheet added composites were very superior.

Key words: PVC combustion, calcium carbonate, Ca-Fe composite oxide, hydrogenchloride capturing, thermal stability