Toyo Boseki Kabushiki Kaisha

Toyobo Co., Ltd.

Kousuke Sasai

Yoshimitsu Sakaguchi

Masahiro Yamashita

Kota Kitamura

Hiroki Yamaguchi

Naoki Watanabe

Shiro Hamamoto

Satoshi Takase

Hiroyuki Wakui

Shigenori Nagahara

Harumi Yonemushi

Junko Nakao

Kouta Kitamura

The purpose is to provide a laminate useful as a temporary support for producing a large-area, high-definition flexible electronic device, the laminate having stably low adhesive strength between a colorless and highly transparent polyimide film and an inorganic substrate even in the case of a large surface area and having few blister defects. The laminate that attains the purpose is obtained by initially wetting either one of an inorganic substrate coated with the silane coupling agent and a colorless polyimide film with an aqueous medium, and then laminating while pressing out the aqueous medium.

Laminate, method for manufacturing laminate, and method for manufacturing flexible electronic device

The present invention relates to a sulfonic acid group-containing polymer excellent in ion conductivity and durability, a method for producing the same, a resin composition containing the sulfonic acid group-containing polymer, a polymer electrolyte membrane, a polymer electrolyte membrane/electrode assembly, and a fuel cell. The sulfonic acid group-containing polymer of the present invention, in a first embodiment, includes a constituent represented by the following chemical formula 1: wherein X represents hydrogen or a monovalent cation species; Y represents a sulfone group or a ketone group; and n represents an arbitrary integer not less than 2.

Sulfonic acid group-containing polymer, method for producing the same, resin composition containing such sulfonic acid group-containing polymer, polymer electrolyte membrane, polymer electrolyte membrane/electrode assembly, and fuel cell

The invention provides a method for producing a polymer electrolyte membrane including (A) a membrane formation step of forming a membrane-form product of an ionic group-containing polymer electrolyte on a support, (B) an acid treatment step of exchanging the ionic group into an acid type by bringing the membrane into contact with an inorganic acid-containing acidic liquid, (C) an acid removal step of removing a free acid in the acid-treated membrane, and (D) a drying step of drying the acid-removed membrane, wherein the steps (B) to (D) are carried out without separating the membrane from the support.

Method for producing a polymer electrolyte membrane

The present invention provides a composite ion exchange membrane which has high mechanical strength and is suitable for use as a solid polymer electrolyte membrane excellent in ionic conductivity and a method for its production. The invention is achieved by a composite ion exchange membrane including a composite layer comprising a support membrane with continuous voids formed of polybenzazole polymer, the support membrane being impregnated with ion exchange resin, and surface layers formed of ion exchange resin free of support membranes, the surface layers being formed on both surfaces of the composite layer so as to sandwich the composite layer therebetween.

Composite ion exchange membrane and electrolyte membrane electrode assembly

Growing community of inventors

Otsu, Japan

Kousuke Sasai