Fluorinated aromatic diamine
US4203922A · kind A · utility
44Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1977 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Oct 11, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a novel aromatic diamine and more particularly to the use of said diamine for the preparation of thermally stable high-molecular weight polymers including, for example, polyamides, polyamideimides, polyimides, and the like. This diamine is obtained by reacting a stoichometric amount of a disodium salt of 2,2-bis(4-hydroxyphenyl) hexafluoropropane with 4-chloronitrobenzene to obtain an intermediate, 2,2-bis[4-(4-nitrophenoxy)phenyl] hexafluoropropane, which is reduced to the corresponding 2,2-bis[4-(4-aminophenoxy)phenyl] hexafluoropropane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.