Polythiophene dispersions, their production and their use

• US 5,300,575 A
• Filed: 12/10/1992
• Issued: 04/05/1994
• Est. Priority Date: 02/08/1990
• Status: Expired due to Term

• Current Assignee: Heraeus Clevios GmbH (Heraeus Holding GMBH)
• Original Assignee: Bayer AG
• Inventors: Jonas, Friedrich, Krafft, Werner
• Primary Examiner(s): Bleutge, John C.
• Assistant Examiner(s): PEZZUTO, HELEN LEE
• Application Number:
  US07/989,731
• Time in Patent Office: 481 Days
• Field of Search: 525/186, 525/206
• US Class Current: 525/186
• CPC Class Codes: C08G 61/126 with a five-membered ring containing one sulfur atom in the ring
• CPC Class Codes: G03C 1/89 Macromolecular substances therefor
• CPC Class Codes: H01B 1/127 comprising five-membered aromatic rings in the main chain, e.g. polypyrroles, polythiophenes
• CPC Class Codes: H01G 11/48 Conductive polymers
• CPC Class Codes: H01G 11/56 Solid electrolytes, e.g. gels; Additives therein
• CPC Class Codes: H01G 9/028 Organic semiconducting electrolytes, e.g. TCNQ
• CPC Class Codes: H10K 85/1135 Polyethylene dioxythiophene [PEDOT]; Derivatives thereof
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

The invention relates to dispersions of polythiophenes made up of structural units corresponding to the following formula ##STR1## in which R₁ and R₂ independently of one another represent hydrogen or a C_1-4 alkyl group or, together, form an optionally substituted C_1-4 alkylene group,

in the presence of polyanions, to the production of these dispersions and to their use for the antistatic treatment of plastic mouldings.

Claims

1. A solution of a polythiophene comprising water or a mixture of water with a water-miscible organic solvent as the dispersing medium, a polythiophene made up of structural units of the formula ##STR17## in which R₁ and R₂ each independently is hydrogen or a C_1-4 alkyl group or, together, form an optionally substituted C_1-4 alkylene group, and a polyanion derived from polystyrene sulfonic acid having a molecular weight in the range from 2,000 to 500,000, the polythiophene having been polymerized in the presence of a polyanion of polystyrene sulfonic acid having a molecular weight in the range from 2,000 to 500,000 by oxidative chemical polymerization.

2. A solution of a polythiophene according to claim 1, wherein the dispersing medium comprises water.

3. A solution of polythiophene according to claim 1, wherein

R₁ and R₂ together form an optionally alkyl-substituted methylene group, an optionally C₁ -C₁₂ -alkyl or phenyl-substituted 1,2-ethylene group, a 1,3-propylene group or a 1,2-cyclohexylene group.