Membranes comprising microporous structure
US4595707A · kind A · utility
9Cited by
2References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1985 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Feb 11, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/0233
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Membrane compositions useful in filtration and distillation applications are prepared by providing a glassy polymer composition (e.g., polystyrene) optionally having an amount of crosslinking and crazing the polymer composition in the presence of a monomer (e.g., methyl methacrylate) which can graft to said polymer composition. The membrane compositions so prepared comprise a microporous structure wherein the micropores can contain polymeric material. Alternatively, the surface region of the membrane composition and/or the surface region of the micropores has a polymeric material grafted thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.