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:
Apr. 25, 2006
Filed:
Dec. 05, 2003
Woon-phil Baik, Gyeonggi-do, KR;
Young-sam Kim, Gyeonggi-do, KR;
Jae-han Park, Seoul, KR;
Sang-gook Jung, Gyeonggi-do, KR;
Woon-Phil Baik, Gyeonggi-do, KR;
Young-Sam Kim, Gyeonggi-do, KR;
Jae-Han Park, Seoul, KR;
Sang-Gook Jung, Gyeonggi-do, KR;
Myongji University, Seoul, KR;
Other;
Abstract
The present invention relates to a process for preparing polythiophenes comprised of unit structures of the general formula 1:where Rand Rindependently represent hydrogen or a C˜Calkyl group, or together represent an optionally substituted C˜Calkylene group, preferably an optionally alkyl-substituted methylene group, an optionally C˜Calkyl- or phenyl-substituted 1,2-ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group. More specifically, the process according to the present invention is characterized by the fact that it is performed by cationic polymerization from 2,5-dihalothiophene in the presence of an acid catalyst, such as Lewis acid, protic acid, oxygen acid, or polymeric acid. The conductivity of the resulting polythiophene is 255 S/cm under optimal conditions.