Electrical Insulation Enamels Composed of Modified Polymers and Electrical Conductors Produced Therefrom and Having Improved Sliding Capacity
AssigneeSchwering & Hasse Elektrodraht GmbH
InventorsWolfgang Bremser, Jorg Ressel, Johann Reicher
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Abstract
The present invention relates to electrical insulation enamels which contain a polymer comprising a base polymer and modifying units which are incompatible with the base polymer after the polymer has cured and lead to the formation of separate phases at the surface, and to processes for the production thereof. The electrical insulation enamels have a low coefficient of friction and frictional resistance and are preferably suitable for the coating of wires.
Claims24
-31. (canceled)
An electrical insulation enamel comprising a polymer comprising a base polymer and modifying units which are incompatible with the base polymer after the polymer has cured, wherein the base polymer is selected from the group consisting of polyamide-imides, polyester-imides, polyamides, polyurethanes, polyimides, polyester-amide-imides, polyepoxides, and mixtures or combinations thereof, wherein the modifying units are polydialkylsiloxanes which comprise 40 to 500 Si units.
A process for producing a coated wire, comprising:
- polymerizing a first modified block, for example a monomer or a prepolymer, with at least one modifying unit comprising at least a second monomer, so as to obtain a polymer comprising modifying units;
- formulating the polymer comprising modifying units with a solvent and optionally additives so as to form an electrical insulation enamel;
- applying the electrical insulation enamel to a wire;
- and,
- subjecting the wire with the applied electrical insulation enamel to a firing process, there being separate regions on the surface of the cured electrical insulation enamel.
An electrical insulation enamel, comprising a polymer and polydialkylsiloxane gel particles, wherein the polymer is selected from the group consisting of polyamide-imides, polyester-imides, polyurethanes, polyesters, polyamides, polyimides, polyester-amide-imides, and mixtures or combinations thereof.
Dependencies are inferred from the claim text.