POLYMER COMPOSITION, METHOD FOR ITS PRODUCTION AND COMPOSITE MATERIAL Russian patent published in 1997 - IPC

FIELD: chemistry of high molecular weight compounds. SUBSTANCE: polypropylene compositions in form of spheroidal particles having average diameter 500-7000 mcm is proposed. Compositions comprise: 10-60 mass parts of polypropylene homopolymer having index of stereoregularity is higher 90 or crystalline propylene copolymer with ethylene and/or alpha-olefin (e.g. butene-1, pentene-1 or 4-methyl-1-pentene) which comprises more than 85 mass % of propylene and has index of stereoregularity higher 85; 10-40 mass parts of polymer fraction comprising ethylene being insoluble in xylene at room temperature; 30-60 mass parts of amorphous fraction of ethylene-propylene copolymer which optionally comprises small amounts of diene being insoluble in xylene at room temperature and which comprises 4-70 mass % of ethylene. Desired compositions have high plasto-elastic properties. EFFECT: improved quality of product, improved efficiency of method. 5 cl, 2 tbl