Halogen-free flame retardant heat conduction insulation warmish and preparation method thereof

Abstract

The invention belongs to the technical field of insulation warmish. The halogen-free flame retardant heat conduction insulation warmish is characterized by using a high-conduction insulation filler and a flame retardant agent with high flame retardance as modifying agents, the modifying agent is filled in heat resistant unsaturated polyester resin, a reactive diluent, a peroxide initiator and an additive are added, and are uniformly mixed to obtain the flame retardant heat conduction insulation warmish which is cured at a temperature of 100-180 DEG C. The flame retardant heat conduction insulation warmish is applied to motor insulation, and has the advantages of high heat conduction property, good flame retardance, excellent salt mist property, good insulation property, long storage period, high curing speed and the like. The flame retardant heat conduction insulation warmish comprises the components in percent by weight of 30-50 percent of heat-resistant unsaturated polyester resin, 10-30 percent of diluting agent, 15-30 percent of heat conduction filler, 15-20 percent of fire retardant, 1-2 percent of initiator and 0.2-1 percent of additive. The halogen-free flame retardant heat conduction insulation warmish formed after curing has a heat conduction coefficient of exceeding of 0.03540W / Mk and fire resistance of reaching ULV (Ultra Low Voltage)-0 level.

Description

technical field [0001] The invention belongs to the technical field of insulating materials, in particular to a flame-retardant and heat-conducting insulating impregnating varnish. Background technique [0002] At present, unsaturated polyester insulating varnish is widely used. It is polymerized from glycol, saturated dibasic acid and unsaturated dibasic acid, and then diluted with styrene, diallyl phthalate or acrylate. made. Unsaturated polyester insulating varnish has low viscosity and good penetration performance. Add peroxide initiators such as tert-butyl peroxybenzoate and dicumyl peroxide to the insulating varnish, and the curing temperature is low, and can be cured at 100-150°C. The unsaturated polyester insulating varnish has a long storage period at room temperature, slow viscosity growth, and less solvent volatilization during the curing process, which plays a role in saving energy, reducing consumption, and reducing environmental pollution. [0003] Unsaturat...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of flame-retardant heat-conducting insulating varnish, which overcomes the problems of fast loss at high temperature, poor thermal conductivity and halogen-free flame retardant compared with common insulating varnishes.

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