Polymer separation membrane
US6656252B2 · kind B2 · utility
10Cited by
18References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2002 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Aug 22, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A separation membrane comprising a polyether polymer having a weight-average molecular weight of 104 to 107 and obtained by polymerizing an oxirane compound of the formula (a): wherein R is a hydrogen atom;an alkyl group, an alkyl group having a halogen atom, or—CH2O(CH2CH2O)k—R′ (R′ is a group selected from an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group and an aralkyl group; k is from 0 to 12); oran ethylenically unsaturated group, a reactive silicon-containing group or a methylepoxy-containing group, is excellent in mechanical strength and flexibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.