Composite semipermeable membrane created by precipitation of emulsion polymers onto base film microporous surfaces
US5075011A · kind A · utility
10Cited by
1References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1991 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Feb 19, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D69/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A composite semipermeable membrane having improved chlorine tolerance, produced by employing the development of a thin film polymer layer by precipitation of the polymer at the interface of an aqueous (or organic) liquid layer; and an aqueous emulsion polymer layer at or near the surface of a semiporous support or substrate. No chemical reaction is involved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.