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Insulation coating and electrical steel material, and preparation method thereof

A technology for insulating coatings and electrical steels, applied in polyester coatings, epoxy resin coatings, coatings, etc., can solve the problems of heat resistance, insulation adhesion, corrosion resistance and poor punching properties of insulating coatings. Achieve excellent heat resistance, improve equipment utilization, and save equipment investment.

Active Publication Date: 2015-06-03
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of poor heat resistance, insulation, adhesion, corrosion resistance and punching properties of the insulating coating obtained at a lower curing temperature of the existing insulating coating for electrical steel, and to provide a An insulating coating capable of obtaining insulating coatings with better heat resistance, insulation, adhesion, corrosion resistance and punching properties at a lower curing temperature

Method used

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  • Insulation coating and electrical steel material, and preparation method thereof
  • Insulation coating and electrical steel material, and preparation method thereof

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preparation example Construction

[0034]The present invention also provides a method for preparing an electrical steel material, the method comprising: attaching the above-mentioned insulating coating to the electrical steel substrate, and then curing the insulating coating, and the curing temperature is 150- 220°C.

[0035] According to the preparation method of the electrical steel material of the present invention, the curing temperature is further preferably 165-195°C.

[0036] According to the preparation method of the electrical steel material of the present invention, the amount of the insulating coating may be 3-6 grams, more preferably 4.0-5.0 grams per square meter of the surface of the electrical steel substrate.

[0037] According to the preparation method of the electrical steel material of the present invention, the curing time of the curing may be 20-50s, more preferably 30-40s.

[0038] According to the preparation method of the above electrical steel material provided by the present invention...

Embodiment 1-6

[0045] According to the component contents listed in Table 1, the components were uniformly mixed under stirring conditions to obtain insulating coatings 1-6 respectively.

[0046] Table 1

[0047]

Embodiment 1

[0049] In embodiment 1, the dihydrogen phosphate is zinc dihydrogen phosphate; the water-soluble film-forming resin is water-soluble styrene-acrylic resin (water-soluble styrene-acrylic resin, purchased from Guangzhou Qisheng Chemical Company, the brand is K167), water-soluble cyclic Oxygen film-forming resin (water-soluble epoxy resin, purchased from Shanghai Lujia Water-based Coatings Co., Ltd., brand G08) and water-soluble silicone film-forming resin (water-soluble silicone resin, purchased from Zaoyang Sihai Chemical Co., Ltd., brand SH-9502) equal weight (in terms of solid content) mixture; the silane coupling agent selected by the coupling agent (silane coupling agent, purchased from Nanjing Qianqian Chemical Co., Ltd., the trade mark is KH560); the chelating agent is lignosulfur Calcium acid calcium (analytical pure); Acid is phytic acid; Auxiliary agent is the leveling agent (purchased from Guangzhou Xuanning Chemical Co., Ltd., brand is 2200) of 0.05 weight part, the d...

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Abstract

The invention provides an insulation coating which is prepared by uniformly mixing a raw material mixture, wherein the raw material mixture comprises dihydrogen phosphate, water-soluble film-forming resin, a coupling agent, acids and water, and the acids is selected from at least one of phosphoric acid, boric acid, fluotitanic acid, acetic acid, oxalic acid, citric acid, maleic acid, benzoic acid, tannic acid, tartaric acid and phytic acid. The invention further provides an electrical steel material. The invention further provides a preparation method of the electrical steel material. The invention further provides the electrical steel material prepared by the above preparation method. The insulation coating provided by the invention can obtain a coating by curing at a lower temperature, and the cured coating has excellent properties such as heat resistance, insulation resistance, adhesion, corrosion resistance, punching resistance, etc.

Description

technical field [0001] The invention relates to an 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 at home and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/08C09D125/14C09D163/00C09D183/04C09D5/25B32B33/00
Inventor 董学强郭太雄徐权刘建华袁萍潘焱许哲峰薛世清尹曦
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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