Process for producing bistrimellitic imide
US5182392A · kind A · utility
5Cited by
1References
2Claims
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Key dates
| Filing date | Nov 14, 1991 |
| Grant date | Jan 26, 1993 |
| Priority date | — |
| Expiry date | Nov 14, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1032
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing a bistrimellitic imide of the formula (2) ##STR1## wherein X is an aliphatic group having at least 2 carbon atoms, an alicyclic group or an aromatic group, which comprises reacting a trimellitic anhydride with a diamine of the formula (1) EQU H.sub.2 N--X--NH.sub.2 (1) PA1 wherein X is as defined above, in the presence of a solvent mixture containing an aprotic polar solvent and an aromatic hydrocarbon solvent which can be distilled azeotropically with water, the amount of the aromatic hydrocarbon solvent being 10 to 90% by weight based on the total weight of these two solvents.
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