Abstract: A crosslinkable vinyl chloride resin composition, comprising; a vinyl chloride copolymer containing hydroxyl groups or a substituent convertible to hydroxyl groups in the copolymer, a polyisocyanate compound as a crosslinking agent and a heat stabilizer composed principally of a salt of a metal of Group IIa in the Periodic Table.

Abstract: An expanded polyvinyl chloride foam is prepared by a process characterized by admixing a polyvinyl chloride resin, which is prepared by emulsion copolymerization of a comonomer having an hydroxyl group, or a group capable of producing an hydroxyl group in the molecule under the processing conditions, with a plasticizer, a cross-linking agent, and a chemical blowing agent, introducing the admixture into a mold at a temperature lower than the melting temperature of said resin, and thereafter heating the resulting molded product to a temperature higher than the melting temperature of said resin to effect foam expansion.