Self-lubricating polyamide acid imide enamelled wire insulated paint

Abstract

The invention relates to self-lubricating polyamide imide enameled wire insulating paint, which comprises the following compositions according to the portions by weight: 20 to 35 portions of polyamide imide resin, 10 to 30 portions of isocyanate, 1 to 10 portions of a lubricant, 1 to 5 portions of an organosilicon surfactant, and 30 to 60 portions of N-methyl pyrrolidine, wherein the lubricant consists of polyphenyl thioether and melamine cyanurate. According to a formulation, the polyamide imide resin, the isocyanate, the lubricant and the organosilicone surfactant are mixed and dissolved in the N-methyl pyrrolidine to prepare a stable transparent liquid oily substance after even agitation at a temperature of between 40 and 60 DEG C. The insulating paint has the advantages of remarkably improving the lubricating performance and friction coefficient of polyamide imide enameled wire paint film while not reducing performance indexes at the same time through directly adding a mixture of the lubricant and the organosilicon surfactant with the performance indexes meeting IEC standards, greatly reducing the friction coefficient and meeting the requirements of high-speed winding.

Description

technical field [0001] The invention relates to a self-lubricating polyamide-imide enameled wire insulating varnish, which is used for preparing enameled wires with good lubricating performance and small friction coefficient and suitable for high-speed winding machines. Background technique [0002] With the rapid development of the electrical and electrical industry, the winding coils of motors and electrical appliances are wound by high-speed winding machines. The destruction of the enamelled insulating film results in a decrease in insulation performance. [0003] In order to reduce the surface friction coefficient of the enameled wire during high-speed winding, liquid paraffin or solid paraffin is usually applied to the surface of the enameled wire, but the coil wound by this method has poor compatibility with the impregnated varnish during the varnish treatment, which is prone to poor adhesion And other problems, and in the new refrigerant-resistant medium (R-134a) of ...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the electrical and electrical industry, the winding coils of motors and electrical appliances are wound by high-speed winding machines. Destruction of the enamelled insulating film, resulting in a decrease in insulation performance

[0003] In order to reduce the surface friction coefficient of the enameled wire during high-speed winding, liquid paraffin or solid paraffin is usually applied to the surface of the enameled wire, but the coil wound by this method has poor compatibility with the impregnated varnish during the varnish treatment, which is prone to poor adhesion And other problems, and in the new refrigerant-resistant medium (R-134a) of the refrigerator compressor, lubricants such as paraffin will precipitate, causing the capillary tube of the refrigeration system to be blocked, reducing the refrigeration capacity, and damaging the operation of the compressor