Polyamic acid to polyimide conversion by microwave heating
US5453161A · kind A · utility
1Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1993 |
| Grant date | Sep 26, 1995 |
| Priority date | — |
| Expiry date | Nov 12, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An intermolecular and/or intramolecular non-foamed polyimide is prepared by heating an aromatic tetracarboxylic acid or dianhydride thereof and an aromatic diamine thereby preparing a polyamic acid, and then subjecting the polyamic acid in the solid phase in the absence of solvent to focused microwave radiation, thereby preparing the polyimide product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.