Ammonia corrosion resistant solvent-free insulated impregnating resin as well as preparation method and application thereof

An insulating impregnating, solvent-free technology, applied in the field of insulating impregnating resin, can solve the problems of workshop operators' health damage, insufficient ammonia corrosion resistance, waste of resources and environment, etc., and achieve excellent ammonia corrosion resistance, good electrical performance, and VOC emissions. low effect

Active Publication Date: 2013-09-04
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ammonia has strong water absorption, and after absorbing water, it forms an alkaline ammonia solution, which has a strong corrosive effect on insulating materials.
[0003] At present, there are very few dipping paints with good ammonia corrosion resistance in the market, and they are mainly epoxy solvent paints, with a content of about 30% to 40% solvent. During the curing process, all solvents are volatilized and discharged into the atmosphere. , while causing serious waste of resources, it also brings environmental pollution, which is harmful to the health of workshop operators
General freon-resistant impregnated resins have insufficient ammonia corrosion resistance, and the market lacks environmentally friendly ammonia-resistant insulating resins with good electrical properties, large amount of paint hanging, and strong adhesion, which are urgently needed by large-scale industrial refrigeration motor manufacturers.

Method used

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  • Ammonia corrosion resistant solvent-free insulated impregnating resin as well as preparation method and application thereof
  • Ammonia corrosion resistant solvent-free insulated impregnating resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 100g epoxidized polybutadiene resin (weight average molecular weight 2000, the molar ratio of epoxy group to double bond is about 1:1, purchased from Tianjin Institute of Synthetic Materials Industry), 100g bisphenol F epoxy resin , heated to 80°C, stirred and added 12g curing agent 594, stirred and reacted for 40min, added 60g vinyl cyclohexene dioxide, 40g vinyl toluene, then added 1.0g tert-butyl peroxybenzoate, 0.01g p-hydroxyanisole , fully stirred evenly to obtain ammonia corrosion-resistant solvent-free impregnating resin. The prepared impregnation resin was cured by baking at 150°C for 5 hours, and the performance was tested. See Table 1 for the results.

Embodiment 2

[0032] Weigh 100g of epoxidized polybutadiene resin (weight average molecular weight 1500, the molar ratio of epoxy group to double bond is about 1.5:1), 80g of bisphenol F epoxy resin, heat to 60°C, stir and add 8g to solidify Agent bc120 stirred and reacted for 50min, added 45g dimethyl-substituted vinyl dioxide cyclohexene, 35g vinyltoluene, then added 1.2g tert-butyl peroxybenzoate, 0.006g p-hydroxyanisole, fully stirred evenly, and obtained Ammonia resistant solvent-free impregnation resin. The prepared impregnation resin was cured by baking at 130°C for 8 hours, and its performance was tested. See Table 1 for the results.

Embodiment 3

[0034] Weigh 150g of epoxidized polybutadiene resin (weight average molecular weight 800, the molar ratio of epoxy group to double bond is about 0.5:1), 135g of novolac epoxy resin, heat to 100°C, stir and add 16g of curing agent 594 Stir the reaction for 30 minutes, add 55g of dimethyl-substituted vinyl dioxide cyclohexene, 50g of vinyltoluene, then add 1.35g of tert-butyl peroxybenzoate, 0.27g of p-hydroxyanisole, and stir well to obtain ammonia-resistant Corrosive solvent-free impregnation resin. The prepared impregnation resin was cured by baking at 160°C for 2 hours, and the performance was tested. See Table 1 for the results.

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Abstract

The invention relates to an ammonia corrosion resistant solvent-free insulated impregnating resin as well as a preparation method and application thereof. The insulated impregnating resin comprises the following raw materials in parts by weight: 100 parts of polybutadiene epoxy resin, 60-100 parts of epoxy resin, 30-100 parts of low-viscosity epoxy compounds, 15-60 parts of vinyl toluene, 5-15 parts of epoxy curing agent, 0.05-3.0 parts of initiator and 0.005-0.05 part of inhibitor, wherein the mole ratio of epoxy groups to double bonds in the polybutadiene epoxy resin is (0.2-1.5):1; and the low-viscosity epoxy compounds are 4-vinylcyclohexene dioxide or dimethyl substituted 4-vinylcyclohexene dioxide or a mixture of the 4-vinylcyclohexene dioxide and the dimethyl substituted 4-vinylcyclohexene dioxide. The impregnating resin provided by the invention is a low-carbon environment-friendly product which not only has excellent ammonia corrosion resistance, electrical performance and heat resistance, but also is low in curing temperature, good in storage stability and suitable for stator insulation treatment of an ammonia refrigeration motor, an ammonia pipe motor and the like.

Description

technical field [0001] The invention belongs to the technical field of insulating impregnating resin, and in particular relates to an ammonia corrosion-resistant solvent-free insulating impregnating resin, a preparation method and application thereof. Background technique [0002] Ammonia is a natural refrigerant with zero OPD and GWP. It has no effect on the ozone layer and greenhouse effect. It is an environmentally friendly refrigerant with low price. In Europe, more than 75% of large-scale central refrigeration systems use ammonia refrigerant so far. In the European food industry and other industrial applications, ammonia refrigerant has always maintained a mainstream position. Especially after chlorofluorocarbons were found to have the ability to destroy the ozone layer, many experts and scholars believe that ammonia is one of the refrigerants most likely to replace R-22. Some major food industry companies in Europe clearly stated that ammonia refrigerant is the only c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/10C08G59/40C08G59/24H02K15/12
Inventor 徐伟红何少波袁世臻夏宇王文
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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