Polyester imine aluminium wire wire coating enamel modifier

Abstract

The invention provides a polyester imide aluminum wire coating enamel modifying agent, comprising the following compositions in weight portion: 10 to 30 portions of a phenolic resin, 10 to 20 portions of an epoxide resin, 1 to 10 portions of a poly-hydroxyl acrylic acid resin, 1 to 5 portions of a fluorocarbon surface active reagent and 30 to 60 portions of cresol m / p mixture. According to the formula, the phenolic resin, the epoxide resin, a cementing compound and the fluorocarbon surface active reagent are mixed and dissolved in a cresol m / p mixture solution and are stirred evenly at a temperature of between 40 and 60 DEG C so that the stable transparent fluid oil matter is produced. The polyester imide aluminum wire coating enamel modifying agent has the advantages that the modifying agent designed by the polyester imide copper wire coating enamel is added in the production, after the treatment of the preparation technique, the adhesive attraction of the polyesterimide wire enamel on the aluminum product is improved evidently, various performance indexes of the aluminum enamelled wire coated by the EIW insulated paint modified by the composite material meet the international electrician IEC standard requirement, and the heat-resisting index can be improved up to 220 grade.

Description

technical field [0001] The invention relates to a polyesterimide aluminum wire enameled wire varnish modifier and a preparation process thereof. The modifier is used to manufacture 220 grade polyesterimide aluminum wire enameled wire insulating varnish. Background technique [0002] Since 2005, due to the sharp rise in copper prices, some enameled wire manufacturers and motor manufacturers have begun to use aluminum wires instead of copper wires to produce and use aluminum enameled wires in order to reduce production costs and material costs. Although the price of aluminum wire is low and the specific gravity is small, the resistivity is higher than that of copper, and the temperature increases when the motor with the same power is running. Therefore, the heat resistance level of aluminum enameled wire is required to be increased under the same use, that is, 200-grade copper enameled wire should be replaced by 220 grade. Aluminum enameled wire can be replaced. [0003] In a...

AI Technical Summary

Problems solved by technology

[0003] In addition, because the thermal expansion coefficient of the aluminum wire is larger than that of the copper wire, the 200-grade polyesterimide enameled wire enamel originally used to coat the copper wire is directly used to coat the aluminum wire, and the adhesion is generally deteriorated due to the change of the thermal stress. The defect of thermal shock performance decline, not to mention the thermal class requirements of 220, limits the use and promotion of enameled aluminum wires to a certain extent.

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