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Solvent-free impregnation resin for low and medium voltage motors and its curing method

A resin-impregnated, solvent-free technology, applied in solvent-free impregnated resin and curing of medium-voltage motors, low-voltage field, can solve the problem of low heat resistance, achieve good flame retardancy, low curing volatiles, and low dielectric loss Effect

Active Publication Date: 2016-04-13
浙江博菲电气股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But still can't solve the technical problem that the heat resistance of the epoxy solvent-free impregnating resin is not high at present

Method used

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  • Solvent-free impregnation resin for low and medium voltage motors and its curing method
  • Solvent-free impregnation resin for low and medium voltage motors and its curing method
  • Solvent-free impregnation resin for low and medium voltage motors and its curing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] According to the formula of solvent-free impregnating resin for low and medium voltage motors of the present embodiment:

[0040] Heat-resistant unsaturated polyester 60g, benzoxazine imine resin 10g, bisphenol A epoxy resin (E44) 5g, novolak epoxy resin (F44) 5g, initiator is dicumyl peroxide (DCP) 1.0 gram, reactive diluent is phthalic acid diacrylate (DAP) 10 grams, curing agent is tung oil anhydride 10 grams, accelerator cobalt naphthenate 0.2g.

[0041] After the above-mentioned components are uniformly mixed according to the formula, the solvent-free impregnating resin for low and medium voltage motors is obtained. When the impregnating resin is used, it should be cured and reacted at about 145°C for 5 hours, and then it can be cured and formed into a film.

Embodiment 2

[0043] According to the formula of solvent-free impregnating resin for low and medium voltage motors of the present embodiment:

[0044]Heat-resistant unsaturated polyester 50g, benzoxazine imine resin 10g, novolak epoxy resin 15g, initiator is benzoyl peroxide (BPO) 2.0g, reactive diluent is styrene (ST) 15g, curing agent 7.0 g of phenylimidazole and 0.4 g of accelerator aluminum acetylacetonate.

[0045] After the above-mentioned components are uniformly mixed according to the formula, the solvent-free impregnating resin for low and medium voltage motors is obtained. When the impregnating resin is used, it should be cured and reacted at about 145°C for 5 hours, and then it can be cured and formed into a film.

Embodiment 3

[0047] According to the formula of solvent-free impregnating resin for low and medium voltage motors of the present embodiment:

[0048] Heat-resistant unsaturated polyester 45g, benzoxazine imine resin 7g, bisphenol A epoxy resin 10g, novolak epoxy resin 5g, initiator is 1.0 grams of dicumyl peroxide (DCP), reactive diluent is 10 grams of vinyl toluene, 20 grams of tung oil anhydride as a curing agent, and 0.4 g of an accelerator aluminum acetylacetonate.

[0049] After the above-mentioned components are uniformly mixed according to the formula, the solvent-free impregnating resin for low, medium and piezoelectric motors is obtained. When the impregnating resin is used, it should be cured and reacted at about 145°C for 5 hours, and then it can be cured and formed into a film.

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Abstract

The invention discloses a solvent-free impregnating resin for a low voltage motor and a medium voltage motor. The solvent-free impregnating resin is composed of, by weight, 40-60% of heat-resisting unsaturated polyester resin, 5-10% of benzoxazine imine resin, 10-15% of epoxy resin, 0.5-2.0% of initiator, 7.0-15% of reactive diluent, 7.0-20% of curing agent and 0.1-1.0% of curing accelerator Due to the fact that benzoxazine imine modified unsaturated solvent-free impregnating resin is synthesized by the benzoxazine imine resin, heat resistance of the impregnating resin is improved, and heat resistance of epoxy unsaturated resin is enabled to increase to the heat-resisting level of polyester imide. Besides, compounded with the high-performance curing agent, the fact that defects of short storage life, bad thermal state surface dryness, large shrinking percentage, low hanging paint amount and low cohesive force in general solvent-free resin are overcome is guaranteed. Further, the solvent-free impregnating resin is excellent in combination property, especially, the cohesive force is as high as 241N, and similar impregnating resin can not achieve the cohesive force easily.

Description

technical field [0001] The invention relates to an impregnating resin, in particular to a solvent-free impregnating resin for low and medium voltage motors and a curing method. Background technique [0002] The impregnation of electrical coils is a standard operation in the production of electrical machinery. The cured impregnating resin functions to mechanically secure the coil, protect against chemical attack and environmental impact, remove generated heat, and provide electrical insulation. [0003] The heat-resistant solvent-free impregnating resin used for H-class electrical coils is an indispensable and important insulating material in the current electrical and electrical manufacturing. This type of impregnating resin in foreign countries is generally polyester-imide type. Use diphenyl ether series. The F-class solvent-free impregnation resin is mostly epoxy polyester type in China. Polyesterimide-type impregnating resins have better performance, but the cost is hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F283/01C08F283/10C08L63/02C08L63/04C08L79/04C08G59/58C08G59/40
Inventor 许坤陆云峰
Owner 浙江博菲电气股份有限公司
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