Patent · US Expired

Recrystallizable polyimides

US5374740A · kind A · utility

3Cited by

2References

6Claims

0Family size

Assignee

BASF SE

Inventors

Karin Elbl-Weiser · Schriesheim, DE
Juergen Koch · Schifferstadt, DE

Key dates

Filing date	Aug 30, 1993
Grant date	Dec 20, 1994
Priority date	—
Expiry date	Aug 30, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2379/08
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyimides can be obtained by reacting a dianhydride component comprising 3,4,3',4'-bisphenyltetracarboxylic dianhydride, oxydiphthalic dianhydride and in addition further aromatic dianhydrides, and a diamine component comprising diamines of the formula ##STR1## and in addition further aromatic diamines.

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