FIELD: production of polymers. SUBSTANCE: oligomer dihydric phenol being preliminary benzoylated is used as reagent 1. 3,4-dibromo-4-methyltetrahydro pyran is used as reagent 2. Reagent 2 and 4-methyl-5,6-dihydro-2H-pyran (said oligomer phenyloxy derivative being prepared during condensation) are treated by aqueous-alcohol solution of sodium hydroxide and affected by rearrangement at 170-190 C. Desired stabilizing agent improves thermal stability of chlorpolyethylene and chlorsulfopolyethylene. EFFECT: improves efficiency of method. 2 tbl
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