Abstract
The change of properties of heat-treated P. V. C. by the addition of different agents, of which isophorone improved heat stability of P. V. C. has been studied by adding isophorone, it was found;
1) Amount of generated HCI from heat-treated P. V. C. was decreased,
2) Heat decomposition of the P. V. C. was suppressed.
Viscosity of the heat-treated P. V. C. by the addition of isophorone was found same to the original heat-treated P. V. C. whereas the one at nitrobenzene was very much changed. Furthermore no decomposed matter and no crosslinked P. V. C. was produced in case of isophorone.
