Chemical protective covering

摘要: This invention provides a selectively permeable protective covering capable of transmitting high quantities water vapor while also being significantly restricting the passage noxious or harmful chemicals even under conditions humidification. The material this basis for creating garments and accessories suitable application in broad range likely to be encountered realistic use scenarios. In its broadest aspect, comprises sheet polyamine polymer wherein at least 10 % amines are amine-acid moieties acidic species said have pKa less than 6.4.