Membranes of polyurethane based materials including...

Details Membranes of polyurethane based materials including... Membranes of polyurethane based materials including...

C - Chemistry, Metallurgy

08

J

C08J 5/18 (2006.01) C08G 18/42 (2006.01) C08L 75/06 (2006.01) A43B 13/20 (2006.01) F15B 1/08 (2006.01)

Patent

CA 2614641

The invention provides membranes which can be employed in various applications as either monolayers or multi-layered laminates. The membrane includes a polyurethane including a polyester polyol and has a durability of at least 200,000 cycles under a KIM analysis. The membrane is in the form of a closed container having an average wall thickness of 18 mils and is inflated with nitrogen gas to 20.0 psig.

La présente invention a pour objet des membranes pouvant être utilisées pour diverses applications soit comme stratifiés monocouches soit comme stratifiés multicouches. La membrane comprend un polyuréthane comportant un polyester de polyol et a une durabilité d'au moins 200 000 cycles lors d'une analyse KIM. La membrane a la forme d'un contenant clos ayant une épaisseur de paroi moyenne de 18 mils et est gonflée avec de l'azote gazeux à 20,0 livres par pouce carré de pression manométrique.

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