Anti-cracking rare earth permanent magnet organic composite coating and preparation method thereof

Abstract

The invention belongs to the technical field of rare earth permanent magnet coatings and relates to an anti-cracking rare earth permanent magnet organic composite coating and a preparation method thereof. The anti-cracking rare earth permanent magnet organic composite coating is prepared from the following raw materials in parts by weight: 25 to 35 parts of epoxy resin, 4 to 6 parts of 2, 2-bisphenol hexafluoropropane diglycidyl ether, 4 to 6 parts of polyglycol ether, 10 to 16 parts of modified carbon fiber, 4 to 6 parts of 1, 6-hexanediol diglycidyl ether and 10 to 15 parts of isobutyl hydroquinone ether benzophenone. The preparation method comprises the following steps of: (1) preparing a coating base material; (2) preparing a component A of the anti-cracking rare earth permanent magnet organic composite coating; (3) preparing a preparation solution of the anti-cracking rare earth permanent magnet organic composite coating; and (4) preparing the anti-cracking rare earth permanent magnet organic composite coating. The anti-cracking rare earth permanent magnet organic composite coating can be used in a low-temperature environment, and has the advantage of reduce possibility of cracking.

Description

technical field [0001] This application relates to the technical field of rare earth permanent magnet coatings, more specifically, it relates to an anti-cracking organic composite coating for rare earth permanent magnets and a preparation method thereof. Background technique [0002] Rare earth permanent magnet is an alloy composed of mixed rare earth metals such as samarium and neodymium and transition metals (such as cobalt, iron, etc.), and is pressed and sintered by powder metallurgy, and then magnetized by a magnetic field. It is used in important fields such as electronic communication and aerospace. In order to reduce the corrosion on the surface of the rare earth permanent magnet, at present, the surface of the rare earth permanent magnet is usually coated with a coating, thereby prolonging the service life of the rare earth permanent magnet. [0003] In the related technology, such as the patent document whose authorized announcement number is CN102031052B disclose...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that due to the lack of low temperature resistance of the above-mentioned adhesive, when the surface coating of the above-mentioned NdFeB rare earth permanent magnet is stored in a low-temperature environment for a long time, the presence of the above-mentioned NdFeB Defects of easy cracking of rare earth permanent magnet surface coating

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