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:
Dec. 14, 2010
Filed:
Jan. 20, 2006
Mitsuyasu Sakuma, Fukushima-Ken, JP;
Tamito Igarashi, Fukushima-Ken, JP;
Aisaku Nagai, Tokyo, JP;
Nobuo Ahiko, Fukushima-Ken, JP;
Mayumi Sugahara, Fukushima-Ken, JP;
Mitsuyasu Sakuma, Fukushima-Ken, JP;
Tamito Igarashi, Fukushima-Ken, JP;
Aisaku Nagai, Tokyo, JP;
Nobuo Ahiko, Fukushima-Ken, JP;
Mayumi Sugahara, Fukushima-Ken, JP;
Kureha Corporation, Tokyo, JP;
Abstract
A core/shell polymer (A), comprising: a rubbery core comprising a crosslinked vinylidene fluoride copolymer (a) having a vinylidene fluoride content of 30-90 wt. % and a shell comprising a vinylidene fluoride polymer (b) having a vinylidene fluoride content which is larger than in the crosslinked vinylidene fluoride copolymer (a) and at least 80 wt. %, in a weight ratio (a)/(b) of 30/70-90/10. The vinylidene fluoride-based core/shell polymer (A) is excellent in mechanical properties including flexibility and resistance to nonaqueous electrolytic solutions, is capable of forming a composite electrode layer showing excellent flexibility and adhesion to an electroconductive substrate in combination with a powder active substance and is therefore suitable for use as a binder for nonaqueous electrochemical devices.