Kureha Corporation

Mayumi Sugahara

Kazuyuki Suzuki

Yoshikichi Teramoto

Aisaku Nagai

Tamito Igarashi

Mitsuyasu Sakuma

Hideki Kitamura

Junya Yamamoto

Nobuo Ahiko

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.

Vinylidene fluoride based core-shell type polymer and use thereof in nonaqueous electrochemical device

Growing community of inventors

Fukushima-ken, Japan

Mayumi Sugahara