Polytrialkylgermylpropyne polymers and membranes
US4759776A · kind A · utility
13Cited by
3References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Dec 8, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/44
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is a group of new polymers and treated, semi-permeable, polymeric membranes made from the new polymers, having improved selectivity for separating components of a gas mixture. The membrane is provided by fluorinating a polymer cast into membrane form, having the general structural formula: ##STR1## wherein R.sub.1 is H or a C.sub.1 -C.sub.2 alkyl group; R.sub.2 and R.sub.3 are independently linear or branched C.sub.1 -C.sub.6 alkyl groups; R.sub.4 is a linear or branched C.sub.1 -C.sub.12 alkyl or aryl group; X is a C.sub.1 -C.sub.3 alkyl group or phenyl; m is at least 100; and n is 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.