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:
Oct. 12, 1999
Filed:
Aug. 13, 1997
Koji Sakata, Toyama, JP;
Toshihiko Nishiyama, Toyama, JP;
Yuuji Aoki, Toyama, JP;
Satoshi Arai, Toyama, JP;
Kenji Araki, Toyama, JP;
NEC Corporation, Tokyo, JP;
Abstract
An electrically-conductive polymer having an improved heat resistance is provided. This polymer contains an electrically-conductive polymer matrix, a multivalent proton acid, and an aromatic compound. The cleavage reaction of the main chain of the electrically-conductive polymer matrix is suppressed. As the polymer matrix, a polymer of pyrrole, thiophene, or aniline, or one of derivatives of pyrrole, thiophene, or aniline is preferably used. As the multivalent proton acid, a proton acid having two or more hydrogen atoms such as sulfuric acid, citric acid, salicylic acid, oxalic acid, and phthalic acid in each molecule is preferably used. As the aromatic compound, a sulfonic acid having at least one sulfonic group in each molecule such as p-toluensulfonic acid, p-ethylbenzenesulfonic acid, p-pentylbenzenesulfonic acid, p-octylbenzenesulfonic acid, p-decylbenzenesulfonic acid, p-dodecylbenzenesulfonic acid, 1-naphthalenesulfonic acid, 2-naphthalenesulfonic acid, and butyl naphthalenesulfonic acid is preferably used.