| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: present invention pertains to the chemical industry and can be used for making articles from a polyolefin composition, obtained through extrusion, moulding and a combination of both. The composition contains (wt %) (1) 65-95% crystalline propylene polymer, insoluble in xylene at ambient temperature in quantity of over 85% and with heterogeneity index ranging from 4.5 to 13 and viscosity index of over 2.2 dl/g; and (2) 5-35% elastomer olefin polymer of ethylene and propylene, with ethylene content ranging from 15% to 85% and viscosity index of not less than 1.4 dl/g. The ratio of the viscosity index of component (1) to the viscosity index of component (2) ranges from 0.45 to 1.6. Single and/or multilayered pipes, films or sheets, made from the given composition can be used at relatively low pressure, have the best resistance to stretching and shock resistance at low temperature without reduction in rigidity. ^ EFFECT: obtaining materials with the best resistance to stretching and shock resistance at low temperature without reduction in rigidity. ^ 13 cl, 4 tbl
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