Method of imparting antistatic properties to a substrate by coating the substrate with a novel polythiophene
AssigneeBayer Aktiengesellschaft
InventorsFriedrich Jonas, Gerhard Heywang, Werner Schmidtberg, Jurgen Heinze, Michael Dietrich
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Abstract
The invention relates to new polythiophenes containing structural units of the formula ##STR1## in which A denotes an optionally substituted C.sub.1 -C.sub.4 -alkylene radical, their preparation by oxidative polymerization of the corresponding thiophenes and the use of the polythiophenes for imparting antistatic properties on substrates which only conduct electrical current poorly or not at all, in particular on plastic mouldings, and as electrode material for rechargeable batteries.
Claims3
In a process for imparting antistatic properties on a substrate which only conducts electrical current poorly or not at all wherein a coating of an electroconductive organic polymer is applied onto the surface of the substrate, the improvement which comprises producing on the surface of the substrate a coating of a polythiophene which consists of structural units of the formula ##STR7## in which A is an C.sub.1 -C.sub.4 -alkylene radical or a substituted C.sub.1 -C.sub.4 -alkylene radical,
- by oxydative polymerization of a 3,4-disubstituted thiophene of the formula ##STR8## in which A has the meaning indicated under formula (I).
Dependencies are inferred from the claim text.