FIELD: chemical industry, particularly preparation of cross- linked foamed polymers. SUBSTANCE: claimed method comprises preparing cross-linked foamed vinyl chloride- based copolymer prepared by polymerization vinyl chloride and glycedyl (epoxy) containing 0.05-30% monomer and, optionally, other monomer by mixing said monomers with foaming and cross-linking agent during heating operation. Decomposition products are chemically active to epoxy groups of copolymer. EFFECT: more efficient preparation method. 9 cl, 9 tbl
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