Patent · US Expired

Process for the preparation of polyimide esters of trimellitic acid

US4631333A · kind A · utility

3Cited by

5References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hans R. Kricheldorf · Hamburg, DE
Ralf Pakull · Krefeld, DE
Hans-Rudolf Dicke · Bestwig, DE

Key dates

Filing date	Jul 30, 1985
Grant date	Dec 23, 1986
Priority date	—
Expiry date	Jul 30, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G73/16
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

This invention relates to a process for the preparation of polyimide esters starting from trimellitic acid anhydride and aminophenols or aminohydroxy biphenyls.

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