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:
Jun. 12, 1990
Filed:
Jan. 25, 1988
Bernd Tieke, Marly, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
The present invention relates to electrically conductive polymers obtainable by anodic oxidation of starting polymers consisting of 5-100 mol % of recurring structural units of the formula I and 95-0 mol % of recurring structural units of the formula II ##STR1## in which R.sup.1 and R.sup.4 independently of one another are C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, phenyl or phenoxy, R.sup.2 and R.sup.3 independently of one another are C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen, cyano or nitro, R.sup.5 is C.sub.1 -C.sub.18 alkyl, which is unsubstituted or can be substituted by one or two hydroxyl groups, or is phenyl or hydroxyl, m is an integer from 3-11, and n and p independently of one another are integers from 0 to 2. The electrically conductive polymers are colored in the visible region, whereas the electrically insulating starting polymers are not colored in this region. The products are suitable especially as electrochromic display elements, as a positive electrode material or as electrically conductive films.