Patent ID: 9044716
Filing Date: 2015-06-02
Classification: B01D,H01M,Y02E

Abstract:
1. A membrane comprising (a) a first layer, the first layer comprising 40.0 wt. % to 85.0 wt. % of an isotactic polypropylene based on the weight of the first layer, the isotactic polypropylene having an Mw≧6.0×10 5 ; (b) a second layer comprising polyolefin; and (c) a third layer comprising 40.0 wt. % to 85.0 wt. % of an isotactic polypropylene based on the weight of the third layer, the isotactic polypropylene having an Mw≧6.0×10 5 ; wherein the membrane is microporous; and wherein the second layer is located between the first and third layers.