FIELD: chemistry.
SUBSTANCE: invention relates to a propylene copolymer-based composition, a moulded article containing the composition and use of the propylene copolymer-based composition to obtain moulded articles, preferably tubes. The propylene copolymer contains 94-99 wt % propylene and 2-4.5 wt % comonomer selected from α-olefins with 4-8 carbon atoms. The propylene copolymer is partially crystallised in a β-modification. The invention also describes a moulded article and use of the composition to obtain moulded articles.
EFFECT: preparation of a propylene-based polymer composition, which enables to obtain moulded articles with excellent long-term stability.
22 cl, 2 dwg, 1 tbl
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