Sunstar Giken Kabushiki Kaisha

Sanyo Electric Co., Ltd.

Sumitomo Rubber Industries Limited

Nitto-denko Corporation

Shinji Bessyo

Satoshi Nishikawa

Shin Fujitani

Takayuki Hattori

Seiji Yoshimura

Naoki Imachi

Yoshihiro Uetani

Satoshi Tanaka

Kenichi Uesaka

Tomoaki Ichikawa

Keisuke Kii

Masaharu Takada

Shinji Okuda

Jun Nishibayashi

Jun Ochi

Shigeru Fujita

Yasuo Takano

A polymer for bonding the positive electrode and negative electrode of a lithium secondary battery, which includes a positive electrode, a negative electrode and an electrolyte solution, with a separator arranged between the positive electrode and the negative electrode. The polymer contains a cationically polymerizable monomer unit (A), a monomer unit (B) providing affinity to the electrolyte solution, a monomer unit (C) providing poor solubility to the electrolyte solution, and a monomer unit (D) containing an anionic or nonionic hydrophilic group. This polymer can be obtained through radical polymerization such as emulsion polymerization or suspension polymerization, and is characterized by having a dissolution rate into a mixed solvent of ethylene carbonate (EC) and diethyl carbonate (DEC) [EC:DEC=5:5 (weight ratio)] of not more than 10% by weight.

Polymer for lithium ion secondary battery and lithium ion secondary battery using same

Provided is a reactive polymer-supporting porous film for use as a battery separator which comprises a porous substrate film and a partially crosslinked reactive polymer supported on the porous substrate film, the partially crosslinked reactive polymer being obtained by the reaction of a crosslinkable polymer having at least one reactive group selected from the group consisting of 3-oxetanyl group and epoxy group in the molecule with a monocarboxylic acid. Further, provided is a method of manufacturing a battery which comprises layering electrodes on the reactive polymer-supporting porous film.

Reactive polymer-supporting porous film for battery separator and use thereof

An electroconductive roller including an electroconductive cellular material layer, comprised of a polyurethane composition, which has an average foamed cell diameter not more than 100 &#x3bc;m and a variation &#x394;D of the foamed cell diameter not more than 50 &#x3bc;m. The electroconductive roller has a hardness variation &#x394;Hs not more than 8 degrees and a circumferential non-uniformity index R/Rin an electric resistance thereof not more than 1.3. The electroconductive cellular material layer is made of a thermosetting one-part polyurethane composition. And the polyurethane composition is cured instantly at a temperature not less than a thermosetting critical temperature for curing thereof, after it is foamed by a mechanical foaming method.

Electroconductive roller

Growing community of inventors

Osaka, Japan

Shinji Bessyo