Thin film composite membranes from vinyl and related nomomers
US5118424A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 30, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Nov 30, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/401
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Novel thin film composite membranes are disclosed. They are prepared from vinyl and related monomers by phase transfer catalysis at the interface between one phase containing a polymerizable vinyl or related monomer and a second phase containing an entity necessary to initiate polymerization of the monomer. The two phases are substantially insoluble in each other. At least one of the phases is a fluid. One of the phases is integral with a porous support or substrate or a precursor of such support or substrate such as a porous organic or inorganic diaphragm made by thermal phase inversion from which the soluble phase has not been extracted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.