Strongly acidic microporous membranes for cation exchange
US5021160A · kind A · utility
30Cited by
13References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1990 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Jan 9, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2309/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Microporous filtration membranes are provided which are useful for absorbing or adsorbing cationic atoms, molecules or particles from liquids or gases. The invention also concerns novel strongly acidic copolymer solutions capable of crosslinking, and a process for preparing such solutions and making strongly acidic or anionic charge modified microporous filtration membranes therefrom. The copolymer of the solutions is synthesized from 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and either N-(isobutoxymethyl)acrylamide (IBMA) or 2-hydroxyethyl methacrylate (HEMA).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.