Preparation of polyimide compositions with cyclic peroxyketal catalyst
US4338430A · kind A · utility
9Cited by
7References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Apr 18, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31725
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides an improvement in a process for preparing polyimide compositions from a mixture of monomers by the application of heat in two stages. The improvement comprises incorporating a cyclic peroxyketal catalyst, such as 3,6,6,9,9,-pentamethyl-3-(ethylacetate)-1,2,4,5-tetraoxycyclononane, into the monomer mixture prior to reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.