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:
Mar. 18, 2008
Filed:
Apr. 09, 2004
Junichi Ishikawa, Sodegaura, JP;
Takashi Kuroki, Sodegaura, JP;
Satoko Fujiyama, Sodegaura, JP;
Takehiko Omi, Sodegaura, JP;
Tomoyuki Nakata, Sodegaura, JP;
Yuichi Okawa, Sodegaura, JP;
Kazuhisa Miyazaki, Sodegaura, JP;
Shigeharu Fujii, Sodegaura, JP;
Shoji Tamai, Sodegaura, JP;
Junichi Ishikawa, Sodegaura, JP;
Takashi Kuroki, Sodegaura, JP;
Satoko Fujiyama, Sodegaura, JP;
Takehiko Omi, Sodegaura, JP;
Tomoyuki Nakata, Sodegaura, JP;
Yuichi Okawa, Sodegaura, JP;
Kazuhisa Miyazaki, Sodegaura, JP;
Shigeharu Fujii, Sodegaura, JP;
Shoji Tamai, Sodegaura, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
The invention provides a crosslinkable aromatic resin having a protonic acid group and a crosslinkable group, suitable for electrolytic membranes and binders used in fuel cells, etc., and electrolytic polymer membranes, binders and fuel cells using the resin. The crosslinkable aromatic resin has a crosslinkable group, which is not derived from the protonic acid group and can form a polymer network without any elimination component. This resin exhibits excellent ion conductivity, heat resistance, water resistance, adhesion property and low methanol permeability. Preferably, the crosslinkable group is composed of a Cto Calkyl group directly bonded to the aromatic ring and/or an alkylene group having 1 to 3 carbon atoms in the main chain in which at least one carbon atom directly bonded to the aromatic ring bonds to hydrogen, and a carbonyl group, or a carbon-carbon double bond or triple bond. The aromatic resins such as aromatic polyethers, aromatic polyamides, aromatic polyimides, aromatic polyamideimides, aromatic polyazoles, etc., which contain such a crosslinkable group, are preferred as the crosslinkable aromatic resins having a protonic acid group and a crosslinkable group.