Melt processable PMR-type polyimides
US6642348B2 · kind B2 · utility
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11References
8Claims
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Assignee
Inventors
Key dates
| Filing date | Mar 2, 2001 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Jun 12, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/101
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides PMR-type polyimides that exhibit lower melt viscosities than PMR-type polyimides of the prior art. These PMR-type polyimides are created by incorporating flexible linkages, such as kinked structures and twisted or non-coplanar moietes into the backbone structure of the PMR. Specifically, the present invention provides for the production of PMR-type polyimides having 2,2′-disubstituted biaryls in the polymer backbone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.