Fluid barrier membranes
US6391405B1 · kind B1 · utility
57Cited by
74References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 1998 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Dec 14, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31551
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention provides amembrane that includes as a gas-barrier component a polyester polyol-modified polyurethane, the polyester polyol portion having repeating units in which the total number of carbon atoms is about eight or less. The membrane has a gas transmission rate of 15.0 or less for nitrogen gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.