The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2012
Filed:
Jul. 20, 2005
Tomoaki Ichikawa, Ibaraki, JP;
Kazushige Yamamoto, Ibaraki, JP;
Yoshihiro Uetani, Ibaraki, JP;
Keisuke Kii, Ibaraki, JP;
Tomoaki Ichikawa, Ibaraki, JP;
Kazushige Yamamoto, Ibaraki, JP;
Yoshihiro Uetani, Ibaraki, JP;
Keisuke Kii, Ibaraki, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
A reactive polymer-supported porous film for a battery separator containing a substrate porous film of a porous film and a reactive polymer supported on the substrate porous film. The porous film has a temperature of 200° C. or more, at which a thickness of the porous film is reduced to ½ of a thickness when a probe is placed on the porous film. The reactive polymer is obtainable by partially crosslinking a crosslinkable polymer and a polyfunctional isocyanate. The crosslinkable polymer is obtainable by copolymerizing a crosslinkable monomer having in a molecule at least one reactive group selected from a 3-oxetanyl group and an epoxy group and a crosslinkable monomer having a reactive group capable of reacting with an isocyanate group.