FIELD: chemistry.
SUBSTANCE: composition contains propylene polymer 60 to 85 % with wide chain-length distribution of polydispersity index 5 to 15 and melt flow rate speed 40 to 75 g/10 min, specified according to ASTM-D 1238, provision L, at 230°C under load 2.16 kg and partially xylene-soluble polyolefin rubber 15 to 40 % containing ethylene propylene copolymer containing at least ethylene 65 wt % and xylene-insoluble components approximately 25-40 wt % specified at 25°C. Polyolefin composition is characterised with good balance of mechanical properties, particularly improved balance of bending elastic modulus and impact strength even at low temperatures, e.g., at -30°C, and also low heat settings.
EFFECT: specified property ensures high dimensional stability to the products made of polyolefin composition according to the present invention.
5 cl, 2 tbl, 2 ex
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RU2532182C2 |
