FIELD: organic chemistry. SUBSTANCE: powdery suspension or weight polyvinyl chloride are stirred and sodium alkylmonosulfonate is added to form free-state mixture layer of 230-300 C for 3-20 minutes, to give foamed polyvinyl chloride material with apparent density of 0,20-2,0 g/cm3, eross linking degree of 5-85%. EFFECT: more efficient preparation process. 2 cl, 1 tbl
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