Methods of preparing polyimides and artifacts composed thereof
US4361453A · kind A · utility
40Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 11, 1981 |
| Grant date | Nov 30, 1982 |
| Priority date | — |
| Expiry date | May 11, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Methods of converting essentially unpolymerized precursors into polyimides in which the precursors are exposed to microwave radiation. Preheating, thermal post-curing, and other techniques may be employed to promote the development of optimum properties; and reinforcements can be employed to impart strength and rigidity to the final product. Also disclosed are processes for making various composite artifacts in which non-polymeric precursors are converted to polyimides by using the techniques described above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.