Composite material used for shell of automotive relay and preparation method thereof

Abstract

The invention discloses a composite material used for a shell of an automotive relay. The composite material is composed of, by weight, 100-130 parts of epoxy resin E40, 2-3 parts of polytetrahydrofuran ether glycol, 10-12 parts of calcium powder, 0.7-1 part of ethoxylated alkylphenol ammonia sulfate, 0.1-0.2 parts of hexamethyl cyclotrisiloxane, 6-9 parts of maleic anhydride, 0.1-0.5 parts of dicumyl peroxide, 17-20 parts of 3-(trifluoromethyl)diphenylketone, 2-3 parts of hydroquinone, 0.1-0.4 parts of 2-thiolbenzimidazole, 1-1.5 parts of nano silicon dioxide, 1-2 parts of sodium tripolyphosphate, 1-1.3 parts of aluminum dihydrogen phosphate, 0.02-0.1 parts of magnesium oxide, 1-2 parts of zinc stearate, 0.5-0.7 parts of meso-benzene polyester, and 0.1-0.3 parts of erucyl amide. The resin material has good toughness and anti-impact property, is high in surface strength, is waterproofing and is good in anti-corrosion performance, has strong protective performance on a relay and is stable in insulation stability. Through anhydride grafting reaction, dispersibility of the fillers in the resin is effectively improved, thereby improving comprehensive performances of the finish product material.

Description

technical field [0001] The invention relates to the technical field of resin materials, in particular to a composite material used for automobile relay casings and a preparation method thereof. Background technique [0002] After curing, the thermosetting resin forms a network structure due to intermolecular crosslinking, so it has high rigidity, high hardness, high temperature resistance, non-flammability, and good dimensional stability of the product, but it is brittle. Therefore, before molding most thermosetting resins into products, various reinforcing materials, such as wood powder, mineral powder, fibers or textiles, are added to strengthen them to make reinforced plastics. In the thermosetting resin, adding reinforcing materials and other additives, such as curing agent, colorant, lubricant, etc., can be made into thermosetting plastics, some are powdery, granular, and some are made into lumps and flakes, collectively referred to as molding compounds. . Commonly us...

AI Technical Summary

Problems solved by technology

Such as electromagnets, contactor coils, transformers, dry-type transformers and other high-voltage and low-voltage electrical appliances, the manufacture of integrally sealed insulating packages has developed rapidly in the electrical industry. However, epoxy materials traditionally used for electrical insulation, Poor corrosion resistance and low impact strength, so in order to continuously improve the protection of electronic appliances, it is necessary to study higher performance epoxy materials