Organo-soluble polyimides from substituted dianhydrides
US5395918A · kind A · utility
9Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1994 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Apr 21, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1082
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention describes new biphenyl dianhydrides, and new polyimides and copolyimides made from the dianhydrides. The synthesized polyimides exhibit significantly enhanced solubility when the biphenyl dianhydrides are substituted, particularly at the 2 and 2' positions on the phenyl rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.