Nitto-denko Corporation

Hideyuki Emori

Kazushige Yamamoto

Yoshihiro Uetani

Shunsuke Noumi

Yutaka Yamamura

Shigeru Fujita

Takahiro Fukuoka

Masao Abe

Hiroyuki Nishii

Shusaku Shibata

Junichi Nagase

Tatsuki Nagatsuka

Yutaka Kishii

Yoshiharu Hatakeyama

Kinkou Sho

Mutsuko Yamaguchi

Saori Fukuzaki

Ion conductive organic-inorganic composite particles are particles that have an organic group on the surface of inorganic particles and have at least a configuration that does not allow the inorganic particles to contact with each other by steric hindrance of the organic group, the organic group containing an ion conductive group.

Ion conductive organic-inorganic composite particles, particle-containing resin composition and ion conductive molded article

Disclosed is an electrolyte membrane which enables a fuel cell to have a high maximum output when used therein since it has high proton conductivity and high hydrogen gas impermeability. Also disclosed are a method for producing such an electrolyte membrane, and a solid polymer fuel cell using such an electrolyte membrane. A method for producing an electrolyte membrane including a step for impregnating a porous base with a solution containing a sulfonic acid group-containing vinyl monomer and then polymerizing the monomer is characterized in that 80% by mole or more of vinyl sulfonic acid having purity of 90% or more, and/or a salt thereof is contained as the sulfonic acid group-containing vinyl monomer, and the concentration of the vinyl sulfonic acid and/or a salt thereof in the solution is set at 35% by weight or more.

Production method of electrolyte membrane, electrolyte membrane and solid polymer fuel cell using same

There are provided a porous film comprising a polymer composition comprising (a) a polymer having C&boxH;C double bond and an aliphatic ring having 5 to 10 carbon atoms in a main chain thereof; and (b) another resin; a porous film, wherein all or a part of C&boxH;C double bond in the (a) polymer is disappeared; and a porous film, wherein the (a) polymer and the (b) resin are cross-linked therebetween. The porous film has appropriate porosity, air permeability and puncture strength, and is especially excellent in latent heat resistance or heat resistance. Further, there are provided a process for producing the porous film; a separator for a battery comprising the porous film; and a battery comprising the separator.

Porous films and processes for the production thereof

A microporous film which is excellent in permeability and mechanical strength and has breakage resistance at high temperatures; a separator for a nonaqueous-electrolyte battery which comprises the microporous film; and a nonaqueous-electrolyte battery employing the separator. The microporous film has a gel content of from 20 to 90% as determined through 3-hour immersion in boiling xylene.

Microporous film

To provide a microporous film having excellent permeability and mechanical strength as well as excellent SD function at low temperatures and film-breaking resistance at high temperatures. A microporous film made of a resin composition at least comprising 1 to 50% by weight of a ring-opening polymer of an unsaturated condensed alicyclic compound, and 1 to 50% by weight of one or more resin components selected from the group consisting of polyolefins having a weight-average molecular weight of 500000 or less, thermoplastic elastomers and graft copolymers.

Growing community of inventors

Ibaraki, Japan

Hideyuki Emori