CROSSLINKED RIGID VINYL CHLORIDE RESIN FOAM AND PROCESS FOR PRODUCING THE SAME

摘要

A process for producing a crosslinked rigid vinyl chloride resin foam excellent in thermal stability, mechanical strength, solvent resistance, and heat insulation and having a finely cellular structure, using not a stabilizer such as a lead compound or cadmium compound but a safer stabilizer. It is characterized by incorporating a hydrotalcite compound into a foamable composition comprising a vinyl chloride resin, an acid anhydride, an isocyanate, a blowing agent, etc. and foaming the mixture.