Chemical protective covering
US6395383B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1999 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Dec 13, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/8305
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
This invention provides a selectively permeable protective covering capable of transmitting high quantities of water vapor while also being capable of significantly restricting the passage of noxious or harmful chemicals even under conditions of high humidification. The material of this invention provides the basis for creating protective garments and accessories suitable for application in the broad range of conditions likely to be encountered in realistic use scenarios. In its broadest aspect, the protective and water vapor permeable covering of this invention comprises a sheet of a polyamine polymer wherein at least 10% of the polyamine polymer amines are amine-acid moieties wherein the acidic species of said amine-acid moieties have a pKa less than 6.4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.