Multilayer plastic pipe comprising an outer polyamide layer and a layer of a molding formed from a mixture of thermoplastic polyester and a compound having at least two isocyanate groups

US5313987A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Stefan Rober · Hamburg, DE
• Joachim Mugge · Haltern, DE
• Roland Feinauer
• Hans Jadamus · Marl, DE
• Hans-Dieter Herrmann · Marl, DE
• Hans Ries · Marl, DE

Key dates

• Filing date: Apr 16, 1993
• Grant date: May 24, 1994
• Expiry date: Apr 16, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S138/07
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A plastic pipe having improved resistance to methanol-containing fuels and improved mechanical properties is provided. This is achieved by a multilayer plastic pipe consisting of at least one outer layer based on polyamide and at least one layer of a linear, crystalline polyester modified with isocyanates. With the aid of the invention it is possible to obtain plastic pipes having improved barrier properties against methanol-containing fuels and dimensional stability and mechanical load-bearing capacity.