Phenylated polyimides prepared from 3,6-diarylpyromellitic dianhydride and aromatic diamines
US5175242A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 1989 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Feb 24, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1082
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A new class of soluble phenylated polyimides made from 3,6-diarypyromellitic dianhydride and process for the manufacture of the 3,6-diarypyromellitic dianhydride starting material. The polyimides obtained with said dianhydride are readily soluble in appropriate organic solvents and are distinguished by excellent thermal, electrical and/or mechanical properties making the polyimides ideally suited as coating materials for microelectronic apparatii, as membranes for selective molecular separation or permeation or selective gas separation or permeation, or as reinforcing fibers in molecular composites, or as high modulus, high tensile strength fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.