| http://www.w3.org/ns/prov#value | - The membrane according to claim 29, wherein the polyurethane including the polyester polyol formed from a carboxylic acid and a diol wherein the reaction product has more than eight carbon atoms is selected from the group consisting of ethylene glycol isophthalate, 1,4 butanediol isophalate and 1,6 hexanediol isophthalate.
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