Water-dispersed insulating varnish composition, insulating coil using same, and method for producing hermetic electric compressor, insulating coil, and hermetic electric compressor

A technology of electric compressors and insulating varnishes, applied in the manufacture of motor generators, insulators, electric components, etc., can solve the problems of organic components volatilization, volatilization, air pollution, etc., and achieve the effect of less VOC generation

Active Publication Date: 2017-10-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, solvent-based varnishes need to volatilize organic solvents in the curing process after impregnation, and a large amount of organic components volatilize
That is, in solvent-based varnishes, in addition to safety and hygiene problems and odor problems caused by a large amount of volatile organic components, there are also air pollution caused by the volatile organic compounds (VOC: Volatile organic compounds) The problem

Method used

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  • Water-dispersed insulating varnish composition, insulating coil using same, and method for producing hermetic electric compressor, insulating coil, and hermetic electric compressor
  • Water-dispersed insulating varnish composition, insulating coil using same, and method for producing hermetic electric compressor, insulating coil, and hermetic electric compressor
  • Water-dispersed insulating varnish composition, insulating coil using same, and method for producing hermetic electric compressor, insulating coil, and hermetic electric compressor

Examples

Experimental program
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Effect test

Embodiment approach 1

[0021] The water-dispersible insulating varnish composition according to Embodiment 1 of the present invention is characterized in that a thermosetting resin having two or more (meth)acryloyl groups in one molecule has a low solubility in water and is within the above-mentioned The surface of a polyfunctional vinyl monomer having two or more (meth)acryloyl groups or allyl groups in one molecule dissolved in a thermosetting resin, an organic peroxide as a reaction initiator, and a dispersant Active agent, mixed with water, free of monofunctional vinyl monomers with one reactive group.

[0022] In the water-dispersed insulating varnish composition of the present invention, since the organic component with low solubility in water is uniformly dispersed in nanometer size in water, the emulsified particles do not settle even in a standing state, and the dispersion stability excellent. In addition, the cured product obtained by heat-treating the water-dispersed insulating varnish c...

Embodiment

[0071] Hereinafter, although an Example and a comparative example demonstrate the detail of this invention, this invention is not limited to these.

[0072]

[0073] The water-dispersible insulating varnish composition of Example 1 was prepared by phase inversion emulsification method. Specifically, 80 wt. parts, 20 parts by weight of trimethylolpropane trimethacrylate as polyfunctional vinyl monomer, 1 part by weight of dicumyl peroxide as organic peroxide, and as surfactant, H.L.B is 16 parts by weight of polyoxyethylene polycyclic phenyl ether were mixed and stirred uniformly to prepare an organic solution that became an oil phase. When 120 parts by weight of water were prepared, and the organic solution was dripped with stirring, it became a viscous suspension. This state is the phase inversion point where the continuous phase changes from the oil phase to the water phase. The dripping of water was stopped at this phase inversion point, and it stirred for 5 minutes. ...

Embodiment 2

[0100] The water-dispersible insulating varnish composition of Example 2 was prepared by a phase inversion emulsification method. Specifically, 75 wt. 10 parts by weight of trimethylolpropane triacrylate and 15 parts by weight of diethylene glycol dimethacrylate as polyfunctional vinyl monomer, 2.5 parts by weight of tert-butyl peroxybenzoate as organic peroxide 15 parts by weight of polyoxyethylene polycyclic phenyl ether as a surfactant, H.L.B is 19, and mixed uniformly to prepare an organic solution that becomes an oil phase. When 130 parts by weight of water were prepared, and the organic solution was dripped with stirring, it became a viscous suspension. This state is the phase inversion point where the continuous phase changes from the oil phase to the water phase. The dripping of water was stopped at this phase inversion point, and it stirred for 10 minutes. Then, the remaining water was slowly added while stirring, and after adding the entire amount of water, the mi...

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Abstract

The water-dispersed insulating varnish composition of the present invention is characterized in that a thermosetting resin having two or more (meth)acryloyl groups in one molecule, and a thermosetting resin having two or more (meth)acryloyl groups in one molecule are dissolved in the thermosetting resin. Two or more (meth)acryloyl or allyl polyfunctional vinyl monomers, organic peroxides as reaction initiators, surfactants as dispersants, and water are mixed, and do not contain Monofunctional vinyl monomer with one reactive group. The water-dispersed insulating varnish composition of the present invention significantly reduces the generation of VOC during the insulation treatment of coils, and can achieve coil winding, crack suppression, electrical insulation assurance, physical support, heat generation suppression and protection, and has long-term Available time.

Description

technical field [0001] The present invention relates to a water-dispersed insulating varnish composition, a method for producing an insulating coil using the same, and a hermetic electric compressor, and an insulating coil and a hermetic electric compressor obtained by these methods. Background technique [0002] Coils of rotating machines such as motors, generators, and compressors are impregnated with insulating varnish in order to maintain the insulation properties and mechanical strength of the formed enameled wires. Since insulating varnishes need to be impregnated between wires of coils, solvent-based varnishes in which low-viscosity resins such as epoxy resins and phenolic resins are dissolved in organic solvents have been widely used. [0003] However, solvent-based varnishes need to volatilize organic solvents in the curing treatment step after impregnation, and a large amount of organic components volatilize. That is, in solvent-based varnishes, in addition to saf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02C08F290/06C09D5/25C09D7/12C09D163/10F04B39/00H01B3/30H02K3/30
CPCC08F290/06C09D163/10H02K15/12H01B3/40H01B3/447C08G59/1466C09D4/06C08F222/1067C08F222/103C08F222/102C09D7/40
Inventor 保田直纪山本茂之柬理寿史白藤好范水野康太龟川展幸日高元雄
Owner MITSUBISHI ELECTRIC CORP
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