Heat-resistant solvent-free immersion paint and preparation method thereof

A solvent-free impregnating paint, high temperature resistance technology, applied in coatings, epoxy resin coatings, etc., can solve the problems of poor craftsmanship, undisclosed key raw materials, high viscosity of paint liquid, etc., and achieves broad application prospects, excellent resistance to Thermal, low-cost effect

Inactive Publication Date: 2012-08-08
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of its key raw materials have not been disclosed yet, and the viscosity of the paint liquid is relatively high, and the manufacturability is not good, so further improvement research is needed in practical applications

Method used

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  • Heat-resistant solvent-free immersion paint and preparation method thereof
  • Heat-resistant solvent-free immersion paint and preparation method thereof
  • Heat-resistant solvent-free immersion paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Put 47.0 g (0.1 mole) of α, ω-diaminopropyl polymethylsiloxane organosilicon diamine into the reaction kettle, heat to 60°C, and add 157.0 g of E-51 bisphenol A type while stirring Epoxy resin (epoxy value 0.51), after stirring and reacting for 0.5 hours, heat up to 100°C, continue stirring and reacting for 0.5 hours to obtain a viscous organosilicon multifunctional epoxy resin, add 1000.0 grams of diglycidyl phthalate Ester and 326.0 grams of 3,4-epoxycyclohexylcarboxylic acid-3′,4′-epoxycyclohexyl methyl ester reactive diluent, 306.0 grams of N,N,N′,N′-tetraglycidyl-4 , 4'-diaminodiphenylmethane silicon-free polyfunctional epoxy resin was added to the reaction kettle, after reacting at 100°C for 0.5 hours, cooling, adding 54.0 grams of 3,3',4,4'-tetracarboxylic acid benzophenone Dianhydride and 150.0 grams of dicyandiamide curing agent powder were stirred evenly at room temperature to obtain a viscous liquid, which was a high-temperature-resistant solvent-free dipping...

Embodiment 2

[0045] Put 47.0 g (0.1 mole) of α, ω-diaminopropyl polymethylsiloxane organosilicon diamine into the reaction kettle, heat to 60°C, and add 227.0 g of E-44 bisphenol A type while stirring Epoxy resin (epoxy value 0.44), after stirring and reacting for 0.5 hours, be warming up to 100 ℃, continue stirring and reacting for 0.5 hours, obtain viscous organosilicon multifunctional epoxy resin, add 322.6 grams of diglycidyl isophthalate Ether, 200.0 grams diglycidyl hydrogenated bisphenol A and 300.0 grams 3',4'-epoxycyclohexylmethyl 3,4-epoxycyclohexylcarboxylate reactive diluent, 339.8 grams N,N,O - Triglycidyl-4-aminophenol and 300.0 g of N,N,N',N'-tetraglycidyl-3,3'-dimethyl-4,4'-diaminodiphenylmethane silicone-free poly Put the functional epoxy resin into the reaction kettle, react at 100°C for 0.5 hours, cool, add 30.0 grams of 4,4'-diaminodiphenyl sulfone and 61.4 grams of dicyandiamide curing agent powder, and stir evenly at room temperature to obtain a viscous The thick liq...

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Abstract

The invention relates to a heat-resistant solvent-free immersion paint which comprises the following components in percentage by weight: 10%-15% of organosilicon polyfunctional epoxy resin, 15%-35% of silicon-free polyfunctional epoxy resin, 5%-10% of curing agent and 45%-65% of reactive diluent. The preparation method thereof comprises the following steps: adding the organosilicon polyfunctionalepoxy resin, the reactive diluent and the silicon-free polyfunctional epoxy resin into a kettle, reacting for 0.5h at the temperature of 100 DEG C, cooling, adding the curing agent, and evenly stirring at room temperature, thus obtaining sticky liquid, i.e. the heat-resistant solvent-free immersion paint. The preparation process is simple, the cost is low, and the industrialized production can beeasily realized; the room-temperature longitudinal shear strength of the heat-resistant solvent-free immersion paint is high; and the heat-resistant solvent-free immersion paint has excellent heat resistance, strong hydrophobic property and wide application prospects in the fields of high-power traction electric machines, high-power generators, drilling motors, mining motors and the like.

Description

technical field [0001] The invention belongs to the field of preparation of organic polymers and electrical insulating materials, and in particular relates to a high-temperature-resistant solvent-free dipping varnish and a preparation method thereof. Background technique [0002] Insulating impregnating varnish is a liquid resin system, through the impregnation process, penetrates and fills into the gaps and pores of coils, wire slots or other insulating materials, and after curing, the coil wires are bonded into an insulating whole, and a continuous surface is formed on the surface. Insulating layer with properties such as dielectric, mechanical and environmental resistance. With the miniaturization and weight reduction of electrical equipment, high temperature resistance requirements are put forward for impregnating varnishes; in addition, most of the commercially available insulating impregnating varnishes are solvent-based, and most of the solvents are poisonous to the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/00
Inventor 虞鑫海陈梅芳
Owner DONGHUA UNIV
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