Preparation of arylene-bis-maleimides
US4226776A · kind A · utility
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Key dates
| Filing date | Nov 19, 1979 |
| Grant date | Oct 7, 1980 |
| Priority date | — |
| Expiry date | Nov 19, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D207/452
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing arylene-bis-maleimides by the reaction of an arylenediamine with maleic anhydride followed by treatment of the intermediate compound with acetic anhydride wherein the process is carried out in acetic acid and in the presence of a tertiary amine and the acetic acid to acetic anhydride mole ratio does not exceed 1.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.