Patent ID: 8276764

Claim:
A method for the making of a microporous polymer membrane comprising the following steps: preparation of a casting solution with a first polymer, a water soluble and phase forming second polymer and/or oligomer and with a filling material including porous particles, wherein the second polymer and/or oligomer is a block-copolymer of propylene oxide and ethylene oxide, formation of at least one additional phase or microphase of the second polymer and/or oligomer in a temperature range between 0° C. and 40° C., wherein the second polymer and/or oligomer undergoes a thermal transition in the solution, taking place at a temperature which corresponds to a melting temperature or a glass transition temperature of the polymers and/or oligomers in the solution, casting a membrane by drawing of the solution in a temperature range between 5° C. and 12° C., drying and precipitation of the drawn solution, and washing out of the second polymer and/or oligomer from the polymer membrane; wherein the filling material is supplemented with at least one catalyst, particularly palladium and/or platinum.