Double-component imine modified epoxy solvent-free impregnated resin and preparation and use methods

Abstract

The invention discloses double-component imine modified epoxy solvent-free impregnated resin and preparation and use methods. The double-component imine modified epoxy solvent-free impregnated resin is formed by mixing 100 parts by weight of component A and 40-80 parts by weight of component B, wherein the component A comprises the following materials in parts by weight: 100 parts of epoxy resin,10-60 parts of Cardo type bismaleimide and 0-20 parts of diluting agent; the component B comprises the following materials in parts by weight: 80-100 parts of liquid acid anhydride, 0.3-2.0 parts of initiator and 0.5-2.0 parts of microcapsule accelerator; the impregnated resin is applied to a vacuum pressure impregnation (VPI) process of a traction motor; the temperature of the impregnated resin is 40-60 DEG C; the curing and baking temperature is 140-200 DEG C; and the time is 10-20 hours. The impregnated resin has the advantages of simplicity in synthesis, cheap raw materials, low cost and superior toughness of a curing system; the synthesized resin is convenient to transport and store and has longer working life during use; the production of toxic and harmful gases is reduced during production; and the impregnated resin belongs to an environmentally-friendly product.

Description

technical field [0001] The invention relates to a high-temperature-resistant epoxy solvent-free impregnating resin suitable for traction motors of high-speed EMUs, subways and urban light rail trains and its preparation method and application, in particular to a Cardo-type imine-modified epoxy solvent-free high-temperature resistant Impregnating resin and methods of making and using same Background technique [0002] 200-grade imine-modified epoxy solvent-free impregnating resin is generally used in the insulation structure of traction motors for EMUs with a speed of more than 200 kilometers per hour, urban subways and light rail trains. In terms of performance indicators, not only the heat resistance index of the cured resin is required to be greater than 200, the instantaneous power frequency breakdown field strength (normal) is greater than 30MVm, the adhesive force (normal) is greater than 100N, and the water absorption rate is less than 0.1%, and the impregnated resin i...

AI Technical Summary

Problems solved by technology

In order to avoid the crystallization of imide resin in the mixture and affect the heat resistance of the impregnated coil, they used a special soluble polymaleimide, whose synthesis is very complicated and the process conditions are harsh, and there are only a few in Japan on the market. A company can produce, and the price is expensive

[0005] Diphenylmethane bismaleimide, as the most common maleimide resin, has been used on a large scale in industrial fields such as electric power, aerospace and construction, but it is difficult to dissolve in epoxy resin, so it is used in environmental protection. Oxygen impregnated resins must be modified, which will lead to a decrease in heat resistance and storage stability of the resin while improving solubility

In addition, after diphenylmethane bismaleimide modified epoxy resin, the brittleness of epoxy resin will be further increased

[0006] At present, the epoxy impregnating resin technology for traction motors of high-speed EMUs, subways and light rails is mainly mastered by a few companies such as Toshiba, Hitachi and Mitsubishi in Japan, and there is no market-oriented product in China, resulting in high prices

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