Stoel Rives LLP
High porosity silica-containing microporous sheets
A flexible microporous polymer sheet having first and second opposite major surfaces comprises a polymer matrix binding a filler component that exhibits high oil absorption capacity in its initial state before the start of material processing. The polymer matrix includes a polyolefin component and has three-dimensional interconnecting and interpenetrating pore and polymer networks through which the bound filler component is distributed from the first major surface to the second major surface. The polyolefin and filler components are included in amounts that result in a microporous polymer sheet having between about 75% and about 90% porosity and containing less than about 10 wt. % polyolefin component. Preferred polyolefin and filler components include ultrahigh molecular weight polyethylene and high oil absorption precipitated silica, respectively.
AMTEK RESEARCH INTERNATIONAL LLC
Y H H
Y02E H01M H01M
additional inventional additional
Jungseung Richard W. Jeff Robert R.
Kim Pekala Frenzel Waterhouse