Patent · US Expired

Aromatic copolyamides, production thereof, formed structures and production thereof

US5571891A · kind A · utility

31Cited by

1References

43Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Holger Jung · Aldenhoven, DE
Richard Neuert · Kelheim, DE
Peter Klein · Burns Lake, CA

Key dates

Filing date	Apr 5, 1995
Grant date	Nov 5, 1996
Priority date	—
Expiry date	Apr 5, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31725
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Aromatic copolyamides, production thereof, formed structures and production thereof Described are aromatic copolyamides comprising the structural repeat units of the formulae I, II and III ##STR1## where Ar.sup.1, Ar.sup.2, Ar.sup.3 and Ar.sup.4 are independently of one another bivalent aromatic radicals whose valence bonds are disposed para or comparably coaxial or parallel to each other,

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