Polymerzusammensetzungen für die Herstellung von Rohren zum Transport von Kohlenwasserstoffen, sowie Gegenstände auf der Basis dieser Zusammensetzungen

摘要

Polymer compositions based on vinylidene fluoride resins, particularly those suitable for the manufacture of pipes for transporting hot hydrocarbons under pressure, comprising, by weight: (A) from 60 to 80% of at least one PVDF homopolymer; (B) from 20 to 40% by weight of at least one thermoplastic copolymer of vinylidene fluoride (VF2) and of at least one other fluorine-containing monomer (for example hexafluoropropylene, chlorotrifluoroethylene or trifluoroethylene), containing approximately from 5 to 25% of this other monomer; and (C) a plasticiser, in an amount from 5 to 20% [with respect to the total weight of the polymers (A) and (B)], preferably dibutyl sebacate or a polyester having a molecular mass of between 1500 and 5000.