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Formula for solvent-free impregnating varnish

A solvent-free impregnating paint and formula technology, applied in polyester coatings, coatings, etc., can solve the problems of easy agglomeration and scrapping, increase in viscosity of paint liquid, etc., and achieve high adhesion, excellent electrical performance, and good moisture resistance. Effect

Inactive Publication Date: 2012-01-18
CHINA XIDIAN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the higher requirements for storage stability of solvent-free paint liquid, the viscosity of paint liquid increases continuously during storage and use, and it is easy to condense and be scrapped. The main problem is the selection of materials such as resin type and initiator.

Method used

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  • Formula for solvent-free impregnating varnish

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Embodiment 1

[0014] The solvent-free dipping varnish formulation of the present embodiment comprises the following components according to mass percentage:

[0015] 308 heat-resistant unsaturated polyester resin 55%; F44 epoxy resin 12%; accelerator 0.04%; hydroquinone 0.01%; initiator 0.95%; styrene 32%.

[0016] Above-mentioned accelerator is p-toluenesulfonic acid; Above-mentioned initiator is dicumyl peroxide.

Embodiment 2

[0018] The solvent-free dipping varnish formulation of the present embodiment comprises the following components according to mass percentage:

[0019] 308 heat-resistant unsaturated polyester resin 57%; F44 epoxy resin 10%; accelerator 0.06%; hydroquinone 0.01%; initiator 0.93%; styrene 32%.

[0020] Above-mentioned accelerator is p-toluenesulfonic acid; Above-mentioned initiator is dicumyl peroxide.

Embodiment 3

[0022] The solvent-free dipping varnish formulation of the present embodiment comprises the following components according to mass percentage:

[0023] 308 heat-resistant unsaturated polyester resin 60%; F44 epoxy resin 8%; accelerator 0.05%; hydroquinone 0.01%; initiator 0.1%; styrene 31.84%.

[0024] Above-mentioned accelerator is p-toluenesulfonic acid; Above-mentioned initiator is dicumyl peroxide.

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Abstract

The present invention discloses a formula for a solvent-free impregnating varnish. The formula comprises the following components, by mass, 55-60% of 308 heat resistant unsaturated polyester resin, 8-12% of epoxy resin, 0.04-0.08% of an accelerating agent, 0.01-0.015% of hydroquinone, 0.5-1.5% of an initiator and 30-35% of styrene. According to the present invention, the formula for the solvent-free impregnating varnish for the motor insulation impregnating is mainly designed; the hydroquinone is selected to improve the storage property of the product; the 308 heat resistant unsaturated polyester resin is selected to improve the heat resistance; the F44 epoxy resin is selected to increase the hardness of the varnish film; with the formula provided by the present invention, the heat resistant grade can reach the class H; the solvent-free impregnating varnish with characteristics of excellent electrical property, high mechanical strength, good moisture resistance, low curing temperature, high adhesion, and good storage stability can be prepared.

Description

technical field [0001] The invention belongs to the field of insulating materials, and relates to a dipping varnish, in particular to a formula of a solvent-free dipping varnish. Background technique [0002] To implement the national policy on energy conservation, emission reduction, environmental protection and low carbon, more and more impregnated insulation of motors and electrical windings is gradually transformed from solvent-less impregnated varnish to solvent-free impregnated varnish. Solvent-free impregnated varnish has its own paint film Fast drying, less dipping times, strong moisture resistance, low viscosity, heat resistance index up to H grade (above 180°C), good mechanical properties: good drying and fast curing, less volatile matter, and the cured product is smooth and foam-free , After a long period of storage, the performance is still stable and reliable, and other significant advantages are widely used. [0003] However, due to the higher requirements for...

Claims

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Application Information

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IPC IPC(8): C09D167/06C09D7/12C09D5/25
Inventor 刘洪斌杜超云
Owner CHINA XIDIAN GRP CO LTD
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