High performance semipermeable composite membrane and process for producing the same
US4559139A · kind A · utility
30Cited by
3References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1982 |
| Grant date | Dec 17, 1985 |
| Priority date | — |
| Expiry date | Apr 14, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A high performance semipermeable composite membrane containing a microporous substrate having a semipermeable membrane on the surface thereof. A composite ultrathin solute rejection barrier is formed on an intermediate transport layer which in turn is formed on a substrate. A mixture of a water soluble organic polymer having reactive amino groups in terminal and/or side chains, together with a monomer or monomeric polyamine is reacted with an agent having a polyfunctional group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.