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. 15, 2013
Filed:
Mar. 10, 2006
Yasuo Takano, Nishinamiya, JP;
Naoki Imachi, Kobe, JP;
Seiji Yoshimura, Hirakata, JP;
Shin Fujitani, Kobe, JP;
Satoshi Nishikawa, Otsu, JP;
Shinji Bessyo, Takatsuki, JP;
Yasuo Takano, Nishinamiya, JP;
Naoki Imachi, Kobe, JP;
Seiji Yoshimura, Hirakata, JP;
Shin Fujitani, Kobe, JP;
Satoshi Nishikawa, Otsu, JP;
Shinji Bessyo, Takatsuki, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Sunstar Giken Kabushiki Kaisha, Takatsuki, JP;
Abstract
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.