Chromium-free insulating coating, electrical sheet material and preparation method thereof

A technology for insulating coatings and electrical steel, applied in the direction of epoxy resin coatings, coatings, and devices for coating liquid on the surface, etc., can solve problems such as poor performance, achieve excellent heat resistance, reduce curing temperature, and optimize process flow Effect

CN102477235AInactive Publication Date: 2012-05-30PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: PANGANG GROUP VANADIUM TITANIUM & RESOURCES
Publication Date: 2012-05-30
Estimated Expiration: Not applicable · inactive patent

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Abstract

The invention provides a chromium-free insulating coating which has better performance after being cured at a lower temperature, an electrical sheet material containing a coating obtained by curing the chromium-free insulating coating and a preparation method thereof. The chromium-free insulating coating is obtained by uniformly mixing a raw material mixture and is characterized in that the raw material mixture comprises a film forming material, dihydric phosphate, an inorganic filler and a solvent. The preparation method of the electrical sheet material comprises the following steps of: adhering the chromium-free insulating coating to an electrical sheet substrate and then curing the chromium-free insulating coating, wherein the curing temperature is not higher than 250 DEG C. The chromium-free insulating coating provided by the invention can be cured at a temperature of 200-250 DEG C, so that the chromium-free insulating coating can be cured by simpler curing equipment, thus the equipment investment is greatly saved, the process flow is easy to further plan and optimize, the equipment utilization rate and the production efficiency of a whole production line are improved, and the energy consumption is greatly reduced.

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Description

technical field

[0001] The invention relates to a chromium-free insulating paint, an electrical steel material and a preparation method of the electrical steel material. Background technique

[0002] Electrical steel is mainly used as core material for electric motors and transformers. In order to reduce eddy current loss, it is necessary to attach an insulating coating to the surface of the steel plate.

[0003] At present, most of the electrical steel coatings at home and abroad are insulating coatings containing chromium. Chromium is an element harmful to the human body and the environment. As the world pays more and more attention to environmental protection, its use is strictly restricted.

[0004] In order to meet the requirements of environmental protection, especially to meet the requirements of the RoHS directive that must be met by the home appliance manufacturing industry, environmental protection insulating coatings for electrical steel are also being developed ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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