Supported water vapor transport membrane comprising polyethylene oxide copolymer
US10569230B2 · kind B2 · utility
1Cited by
10References
15Claims
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Key dates
| Filing date | May 30, 2016 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Nov 6, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An air-impermeable water vapor transport membrane comprises an active layer on a microporous polymeric substrate. The active layer comprises a polyethylene-oxide containing copolymer and a polar protic solvent in an amount of about 3% to about 100% of copolymer weight in the active layer. Molecules of the protic solvent are bonded to the copolymer. The polar protic solvent reduces temperature-dependent variability in the water-vapor permeability of the membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.