FIELD: polymeric materials. SUBSTANCE: composition has the following components, wt.-%: polyphenylene oxide, polystyrene or their mixture 20-60; polypropylene 5-66; grafted copolymer of styrene and polypropylene (styrene content is 30-45 wt.-%), and block-copolymer of vinylaromatic monomer and coupled diene 4-10. Composition is used as plastics exhibiting high heat-stability and stretching strength at increased temperatures. EFFECT: enhanced quality of composition. 5 cl, 6 tbl
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