Self-lubricating polyamidoimide enamelled wire paint and preparation method thereof

Abstract

The invention relates to a self-lubricating polyamidoimide enamelled wire paint preparation method, which comprises the following steps: 1)preparation method of polyamidoimide resin: employing dimethyl acetamide, 4,4'-diaminodiphenyl ether, dissolving and then adding pyromellitic dianhydride by eight batches, stirring and reacting until the color is transparent; 2)preparation method of wax slurry: adding xylene and wax under stirring, gradually heating from room temperature to 100-120 DEG C in 3-5 hours, insulating for 2-3 hours, cooling to room temperature; and 3)preparation method of the enamelled wire paint: taking polyamidoimide resin and wax slurry, stirring and uniformly mixing, heating to 160-180 DEG C, insulating for 10-20 hours, and cooling to room temperature to obtain the self-lubricating polyamidoimide enamelled wire. According to the invention, wax slurry with good lubricity is introduced in the polyamidoimide enamelled wire, maximum static friction coefficient of the enamelled wire is reduced, and the maximum static friction coefficient of the enamelled wire is about 0.060.

Description

technical field [0001] The invention relates to the preparation of wire enamel, in particular to a self-lubricating polyamide-imide wire enamel and a preparation method thereof. Background technique [0002] Enameled wire enamel is an indispensable electrical insulation coating applied to electrical equipment, and is one of the key raw materials for controlling the economic and technical indicators and operating life of electrical equipment. With the development of the times and the economy, higher requirements have been put forward for the temperature resistance level of enameled wire in the fields of military and people's livelihood. [0003] Polyamide-imide varnish is the main raw material for general-purpose high-performance composite coating enamelled round and flat wires. It is a C-class high-temperature-resistant enameled wire varnish with excellent comprehensive performance. It is widely used in traction motors and sealed motors, especially for freezing resistance M...

AI Technical Summary

Problems solved by technology

However, due to the friction and impact of the enameled wire during winding, the insulation layer of the enameled wire is easily damaged by mechanical damage, resulting in a decrease in the insulation performance of the enameled wire. Therefore, higher requirements are put forward for the lubricity and smoothness of the surface of the enameled wire. Good winding performance and winding performance

At present, the maximum static friction coefficient of the enameled wire coated with ordinary polyamide-imide enameled wire enamel is above 0.120. The higher the friction coefficient, the easier it is to cause the performance of the enameled wire to decline. sex

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