Membranes formed from rigid aromatic polyamides
US5034027A · kind A · utility
10Cited by
10References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1990 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Mar 30, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is a class of polymeric membranes formed from aromatic polyamides derived from dicarboxylic acid chlorides and cardo diamines having alkyl substituents on all portions ortho to the amine functions. These polyamide membranes exhibit high gas permselectivities and are useful in various gas separation applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.