Novel Conductive Polymers

POLYISOTHIANAPHTENE, A NEW CONDUCTING POLYMER

UC Case No. 1984-044-2

U.S. Patent 4,640,748

Patent Abstract: A polymer having an isothianaphthene structure represented by the formula (Ia) and/or Ib): wherein R.sup.1 and R.sup.2 each represents a hydrogen atom or a hydrocarbon residue having 1 to 5 carbon atoms such as methyl, methoxy and thiomethyl, with the proviso that R.sup.1 and R.sup.2 may link together to form, along with the benzene ring, a fused ring which is naphthalene; X is sulfur, selenium or tellurium; Y.sup.- represents an anion of an electrolyte; z represents a number from 0.01 to 1 showing a ratio of the anion per mol of a monomer; and n represents a number of from 5 to 500 showing a degree of polymerization. An electrochromic display wherein a high molecular weight conductive membrane formed on a conductive transparent base is used as a display base and an opposing electrode is arranged thereunder via a liquid electrolyte, which is characterized in that said high molecular weight conductive membrane is a polymer having an isothianaphthene structure and capable of being reversibly oxidized or reduced.

POLYMER HAVING ISOTHIANAPHTHENE STRUCTURE AND ELECTROCHROMIC DISPLAY

UC Case No. 1984-044-3

U.S. Patent 4,772,940

Patent Abstract: An electrochromic display device is provided in which a high molecular weight conductive membrane is formed on a conductive, transparent base, and an opposing electrode is arranged thereunder via a liquid electrolyte. The conductive, electrochromic membrane is a polyisothianaphthene, a chemically and physically stable material which gives the device superior electrochromic switching characteristics, including a fast response time and a high contrast color change upon oxidation and reduction. Other applications which rely on the electrochromic properties of the polyisothianaphthene are disclosed as well.

CONDUCTING SUBSTITUTED POLYISOTHIANAPHTHENES

UC Case No.1984-044-4

U.S. Patent 4,795,242

Patent Abstract: Polyisothianaphthene substituted in the 5 and/or 6 positions so as to have an oxygen atom adjacent to C.sub.5 or C.sub.6. Substituents include alkoxys, hydroxys and dioxyalkylenes. The polymers are conducting and useful in electrochromic displays and as electrode materials.

REFERENCE: 1984-044

Patents:
US 4,640,748   [MORE INFO]
US 4,772,940   [MORE INFO]
US 4,795,242   [MORE INFO]

Type of Offer: Licensing



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