Polymer compositions intended for the manufacture of pipes for conveying hydrocarbons and articles based on these compositions

US6770372B2 · kind B2 · utility

Assignee

• SOLVAY (Société Anonyme) · BE

Inventors

• Pierre Lasson · Brussels, BE
• Yves-Julien Lambert · Chaumont-Gistoux, BE
• Yves Vanderveken · Heverlee, BE
• Nestor Maquet · Waha, BE

Key dates

• Filing date: Jun 18, 2001
• Grant date: Aug 3, 2004
• Expiry date: Dec 24, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31544
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

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