Addition products of di-acetylene-terminated polyimide derivatives with a polyimide having terminal non-conjugated acetylene groups
US4402878A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1982 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Mar 2, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D491/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel, unsaturated diacteylene-terminated polyimides and processes for their preparation are disclosed herein. These new polyimides are derivatives of anhydride-terminated aromatic polyimides from which they can be prepared by amidation to provide new unsaturated amide groups having a terminal group containing the structure --C.tbd.C--C.tbd.C--, hereinafter sometimes referred to as "conjugated diynes". These new compositions are more tractable than the original anhydride-terminated polyimides and can be converted at appropriate lower temperatures to crosslinked, insoluble, infusible polymers without by-product formation, thereby extending greatly the applications for which the aromatic polyimides can be employed. Moreover, these new polyimides can undergo the Diels-Alder type of addition with a large number of dienophiles. Certain monomeric materials are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.