Resin emulsion paint special for epoxy pnenolic aldehyde stalloy and preparation thereof

Abstract

The invention discloses resin paint special for epoxy phenol-formaldehyde silicon steel sheet and the preparation method thereof. The resin paint comprises, by weight, polymer 609 epoxy resin 98 to 102 parts, 214 phenol-formaldehyde resin 18 parts, Z-11 epoxy toughener 5 parts, L-12 leveling agent 7.8 parts, and diluting agent 2 to 5 parts. The diluting agent is toluene or ethanol or ethyl acetate. The resin paint has the advantage of excellent performance in resisting heat, moisture, oil, and chemical corrosion, and can be applied at normal temperature and dried rapidly. The resin has good uniformity and arbitrarily adjustable viscosity, and can be uniformly mixed with inorganic filler to achieve good manufacturability. The resin paint has good adhesion with the surface coating of silicon steel sheet, and the coating has good mechanical strength, high heat resistant grade and high insulation resistance coefficient, and can be used for F-grade (155 DEG C) electric products to achieve long storage life.

Description

Technical field: [0001] The invention relates to an insulating resin varnish, in particular to an impregnated insulating resin varnish for silicon steel sheets in motors and generators. Background technique: [0002] At present, the silicon steel sheet paints used in electrical products such as motors and generators mainly include B-grade 1611 phenolic silicon steel sheet paint, 5364 alkyd silicon steel sheet paint, H-grade 947S silicon organic paint and polyester silicon steel sheet paint. The disadvantages are as follows: [0003] ①1611 phenolic silicon steel sheet paint belongs to Class B insulation (130°C), the temperature for punching and painting is as high as 550°C, which consumes a lot of energy, and the edge of the laminate is thickened, the insulation resistivity is low, and the adhesion to the silicon steel sheet coating is poor. Especially noticeable in hot and humid conditions. [0004] ②Although 5364 alkyd silicon steel sheet paint has low painting temperatur...

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Problems solved by technology

[0004] ②Although 5364 alkyd silicon steel sheet paint has low painting temperature and low energy consumption, it also has other disadvantages of phenolic silicon steel sheet paint, that is, the edge of the laminate is thickened, the insulation resistivity is low, and it adheres to the silicon steel sheet coating. Poor focus

[0005] ③Although 947S silicon organic paint belongs to H-level insulation (180°C), the temperature for punching and painting is high, and the adhesion to the silicon steel paint coating is extremely poor.

[0007] The electrical properties, heat resistance, adhesion to silicon steel sheet coating, moisture resistance, oil resistance, chemical corrosion resistance, mechanical properties and good workmanship of these paints are difficult to meet the requirements of B and F class large and medium-sized AC and DC paints. Technical requirements for silicon steel sheets and punching coatings of motors, large turbogenerators, hydrogenerators, transformers and special motors. The iron core of the generator is easy to short circuit, and the loss of the iron core is large, that is, the eddy current loss.

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