Chemical protective covering

A - Human Necessities – 62 – D

Patent

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A62D 5/00 (2006.01)

Patent

CA 2393745

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 pK a less than 6.4.

L'invention concerne un revêtement de protection sélectivement perméable permettant le passage de grandes quantités de vapeur d'eau et empêchant sensiblement le passage de produits chimiques toxiques ou nocifs, même dans des conditions de grande humidification. La matière utilisée dans la présente invention offre une base permettant de créer des vêtements et des accessoires de protection destinés à être utilisés dans de nombreuses conditions pouvant être rencontrées dans des situations pratiques réelles. Globalement, ce revêtement de protection perméable à la vapeur d'eau est composé d'une couche de polymère polyamine dans laquelle au moins 10 % des amines du polymère polyamine sont des fragments d'amino acide dans lesquels les espèces acides desdits fragments d'amino acide ont un pKa inférieur à 6,4.

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