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专利名称：CAPILLARY COLLAPSE RESISTANT
MICROPOROUS MATERIAL AND METHOD
发明人：RADOVANOVIC, Philip D.,PEREZ, Mario
A.,THOMAS, Scott D.
申请号：EP00947536.9申请日：20000719公开号：EP1228142A1公开日：20020807
摘要：Microporous material comprising a polypropylene polymer having at least 20percent crystallinity; and a compatible, amorphous, glassy polymer, wherein said
polymers are miscible in a compound when heated above the melting temperature of thepolypropylene polymer and wherein a polypropylene polymer phase separates from thecompound when cooled below the crystallization temperature of the polypropylenepolymer. Microporous material is made by a thermally induced phase separation processusing a compound such as mineral oil to form one phase containing both polymers. Thepores of the microporous material resist collapse during processing. Membranes madeof this material are useful as battery separators having a good combination of strength,porosity, and ionic resistance when imbibed with an electrolyte.
申请人：3M Innovative Properties Company
地址：3M Center,P.O. Box 33427 Saint Paul, MN 55133-3427 US
国籍：US
代理机构：Meyers, Hans-Wilhelm, Dr.Dipl.-Chem.
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