FIELD: polymer chemistry.
SUBSTANCE: invention refers to the polypropylene composition, its manufacturing and use. Composition contains isotactic propylene homopolymer and statistic propylene-butene co-polymer containing 1-buten up to 8 % w/w or statistic propylene-ethylene copolymer (B') containing ethylene no more than 3.0% w/w (weight). The composition is at least by 50% crystallized in β-modification. Polypropylene composition demonstrates excellent performance characteristics during test for pressure while maintaining hardness, as well as impact resistance on high levels. Also the invention refers to tubes and cables with abovementioned properties.
EFFECT: increased quality and durability of tubes and cables.
18 cl, 6 tbl, 7 ex
