Patent · US Expired

Multilayer plastic pipe

US5404915A · kind A · utility

33Cited by

16References

25Claims

0Family size

Assignee

Huels Aktiengesellschaft · DE

Inventors

Joachim Mugge · Haltern, DE
Stefan Rober · Hamburg, DE
Hans-Dieter Herrmann · Marl, DE
Hans Ries · Marl, DE

Key dates

Filing date	Nov 10, 1992
Grant date	Apr 11, 1995
Priority date	—
Expiry date	Nov 10, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S138/07
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A multilayer plastic pipe having improved barrier action against diffusion of the substance being transported, particularly methanol-containing fuels, dimensional stability, resistance to mechanical stress, and particularly improved adhesion between layers is provided comprising: PA1 (A) an inner layer and an outer layer, each of which comprise a polyamide-based molding composition, wherein the inner layer and outer layer may be the same or different, and (B) at least one intermediate layer comprising PA2 a) 95 to 60% by weight of a linear, crystalline polyester and PA2 b) 5 to 40% by weight of a polymer containing reactive groups other than epoxide groups, wherein the reactive groups are contained in a concentration of from 4 to 95 mmol/kg based on the total amount of component (B); and wherein the layers are intimately bonded to one another.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.