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

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...

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.

Images