USE OF AMORPHOUS POLETHERSULFONES IN THE EXTRUSION-PROCESS MANUFACTURE OF INSULATED COPPER WINDING WIRES

摘要

1. Use of amorphous polyether sulfones of the general formula see diagramm : EP0017062,P7,F3 in which Ar represents a divalent phenylene, diphenylene or naphthylene residue or a divalent residue of formula II [Ar' - A]m - Ar' - in which Ar' stands for a divalent phenylene residue, A stands for a divalent residue from the group -SO2 -, -CO-, -NH-CO-, -CO-NH- and in which m represents 1 or 2 and n an integer from 50 to 150, for the production of insulated winding wires from copper by extrusion, without stretching the coating so that the total thickness of the insulation meets with the requirements of the German Industrial Standard DIN 46435.