Preparation of aromatic polyimides from CO, primary diamine and bis (halo aromatic carboxylic acid ester)
US5216118A · kind A · utility
1Cited by
9References
20Claims
0Family size
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Key dates
| Filing date | Feb 25, 1992 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Feb 25, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1021
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing polyimides comprising reacting carbon monoxide, a primary diamine and a reactant selected from the group consisting of bis(o-iodoaromatic ester)s and bis(o-bromoaromatic ester)s, in the presence of solvent and catalyst, said catalyst being a compound of a metal seIected from the group consisting of platinum, palladium and nickel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.