Process for the polymerization tri-substituted silylalkynes
US4902763A · kind A · utility
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2References
8Claims
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Key dates
| Filing date | May 27, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | May 27, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Polymeric trisubstituted silylalkynes useful for forming gas separation membranes are prepared at accelerated polymerization rates and with improved yields in the presence of a Group VV or VIB Metal halide catalyst such as TaCl.sub.5, by employing about 0.1 to 5 mole %, based upon total alkyne concentration, of a trialkylgermylalkyne compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.