Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2006-07-27
2011-11-15
Nutter, Nathan M (Department: 1765)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S240000, C524S515000, C521S064000, C521S142000, C521S143000, C429S247000
Reexamination Certificate
active
08058348
ABSTRACT:
A polyolefin microporous film comprising polyethylene and polypropylene having a viscosity average molecular weight of 100,000 or higher, the polypropylene being contained in an amount of 4 wt % or more and the terminal vinyl group concentration per 10,000 carbon atoms in the polyolefin constituting the microporous film being 2 or more as measured by infrared spectroscopy. The microporous film has both of a good film breaking resistance and a low thermal shrinkage, is excellent in fuse property, and has a uniform film thickness. Particularly, the microporous film can retain safety in the oven safety test at 150° C. for a battery which is required for use as a lithium ion battery separator.
REFERENCES:
patent: 6054498 (2000-04-01), Hasegawa et al.
patent: 2003/0168764 (2003-09-01), Nishida et al.
patent: 9-12756 (1997-01-01), None
patent: 10-298324 (1998-11-01), None
patent: 2004-196870 (2004-07-01), None
patent: 2004-196871 (2004-07-01), None
patent: 2005-200578 (2005-07-01), None
patent: 3699561 (2005-07-01), None
patent: 2003-24707 (2003-03-01), None
patent: WO 97/23554 (1997-07-01), None
patent: WO 02/092677 (2002-11-01), None
Molecular Weight, Polymer Science Learning Center, Department of Polymer Science, The University of Southern Mississippi http//:pslc.ws/mactest/weight.htm.
Inagaki Daisuke
Takeda Hisashi
Asahi Kasei Chemicals Corporation
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Nutter Nathan M
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