A single or multi-layer microporous material of which at least one layer contains a compatible, melt-processible polymer mixture having a first polymer component with a melting point greater than 140 DEG C. and a second polymer component having a melting point lower than 120 DEG C. is described as well as a method of preparing the material. The first polymer component and the second polymer component are miscible in a compound or compatible liquid when heated above the melting temperature of the first polymer component or above the liquid-liquid phase separation temperature and phase separate from the compound or compatible liquid when cooled. The materials are particularly useful as battery separators.
申请公布号
US5993954(A)
申请公布日期
1999.11.30
申请号
US19970841041
申请日期
1997.04.29
申请人
3M INNOVATIVE PROPERTIES COMPANY
发明人
RADOVANOVIC, PHILIP D.;KROGSENG, GARI P.;WALLER, JR., CLINTON P.;MROZINSKI, JAMES S.;KRUEGER, DENNIS L.