Membranes based on polyurethane and / or separators for electrochemical cells

摘要

A membrane comprising (a) a thermoplastic polyurethane composition of poly (dialkylene ester) made by reacting (i) at least one intermediate of poly (dialkylene ester) polyol with (ii) at least one diisocyanate and (iii) at least a chain extender; wherein (i), the polyester polyol intermediate, comprises an intermediate derived from at least one dialkylene glycol and at least one dicarboxylic acid, or an ester or anhydride thereof, and wherein the thermoplastic polyurethane composition further comprises a charge selected from the group consisting of nanoloads and nanofibers.