Oxirane polyimide copolymers
US4277583A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1979 |
| Grant date | Jul 7, 1981 |
| Priority date | — |
| Expiry date | Dec 3, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L79/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The copolymers disclosed herein comprise the reaction products of polyoxirane or polyepoxide compounds with amine-terminated aromatic polyimides. The reaction of the oxirane group with the amine group produces hydroxylamine groups which connect the polyimide portion with the polyepoxide precursor portion of the resultant copolymer without by-product formation. These copolymers are more tractable than the original unreacted amine-terminated polyimides and can be converted at appropriate lower temperatures to insoluble, infusible polymers. Thus they can be fabricated economically at lower temperatures and pressures and extend greatly the number of applications for which the aromatic polyimides can be employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.