Bis-m-benzotrifluoride compounds
US5498691A · kind A · utility
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7References
14Claims
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Key dates
| Filing date | Oct 9, 1990 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Oct 9, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C323/09
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed are bis-meta-benzotrifluoride compounds having the general formula ##STR1## where each A is independently selected from the group consisting of NO.sub.2, NH.sub.2, and NH.sub.3.sup.+ Z.sup.-, Z.sup.- is an anion and B is selected from the group consisting of O, CO, S, SO, and SO.sub.2. The diamine compounds are useful as monomers in making polyimides, polyamide-imides, and polyamides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.