Jsr Corporation

Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Mayumi Kakuta

Kohei Goto

Igor Rozhanskii

Nagayuki Kanaoka

Yoshitaka Yamakawa

Yasutake Inoue

Naoki Mitsuta

Kinji Yamada

Masaru Iguchi

Michinori Nishikawa

Yoichi Asano

Masaaki Nanaumi

Ryoichiro Takahashi

Hiroshi Soma

Toshihiro Otsuki

Minoru Matsubara

Kentarou Tamaki

Fusazumi Masaka

Kiyonori Kita

Masahiko Ebisawa

Satoko Hakamatsuka

The present invention provides a proton conductive membrane having capabilities of self-generating water and maintaining water, excellent ion conductivity and excellent effect of inhibiting crossover and usable for solid polymer electrolyte type fuel cells and also provides a proton conductive composition used for preparing the proton conductive membrane. The proton conductive composition comprises 100 parts by weight of a polyarylene having a sulfonic group and 0.01 to 80 parts by weight of at least one metal catalyst selected from the group consisting of platinum, gold, palladium, rhodium, iridium and ruthenium, or comprises 100 parts by weight of a polyarylene having a sulfonic group, 0.01 to 80 parts by weight of the metal catalyst, and 0.01 to 50 parts by weight of metal oxide fine particles and/or fibers in total.

Proton conductive composition and proton conductive membrane

The invention provides a proton conductive membrane excellent in heat resistance, which has sulfonic acid as ion exchange groups. The proton conductive membrane comprises a nitrogen-containing compound that can be mixed with water in arbitrary proportions and has a boiling point of not lower than 100. degree. C. and a proton conductive resin which has sulfonic acid ion-exchange groups, wherein the nitrogen-containing compound is contained in an amount of 0.5 to 10 parts by weight based on 100 parts by weight of the proton conductive resin.

Proton conductive membrane having improved thermal stability

A polyarylene copolymer which comprises (A) aromatic compound units having a main chain containing one or more electron-withdrawing groups therein and (B) aromatic compound units having a main chain containing no electron-withdrawing groups therein, and a proton-conductive membrane comprising the polyarylene copolymer having sulfonic acid groups.

Polyarylene copolymers and proton-conductive membrane

A polyarylene copolymer which comprises (A) from 60 to 3 mol % aromatic compound units having a main chain containing one or more electron-withdrawing groups therein and (B) from 40 to 97 mol % aromatic compound units having a main chain containing no electron-withdrawing groups therein (provided that (A)&plus;(B)&equals;100 mol %), and a proton-conductive membrane comprising the polyarylene copolymer having sulfonic acid groups.

Composition for film formation and material for insulating film formation

Electronic parts and a process for manufacturing the electronic parts are provided. The electronic parts comprise an electric insulating material exhibiting a high heat resistance and low dielectric constant as a structural component. The electric insulating material is formed of a polyimide containing a recurring unit represented by the following general formula (1). ##STR1##

Electronic part and process for manufacturing the same

Growing community of inventors

Tokyo, Japan

Mayumi Kakuta