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A semi-organic insulating coating for non-oriented silicon steel

An insulating coating, oriented silicon steel technology, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve problems such as poor adhesion, poor coating elasticity, and unachieved, and meet the requirements of environmental protection and excellent performance. Effect

Active Publication Date: 2016-03-30
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating has excellent heat resistance, weldability, and insulation, but due to the lack of organic resin, the coating has poor elasticity and is easy to cause wear to the stamping die. At the same time, the adhesion is poor, which is easy to cause when the film thickness is thick Collapsed coils cause inconvenience to the transportation and processing of steel coils
[0010] It can be seen that the existing chromium-free and environmentally friendly semi-organic coating technology for non-oriented silicon steel has not yet reached the level of completely replacing chromium-containing semi-organic coatings, whether domestic or foreign.

Method used

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  • A semi-organic insulating coating for non-oriented silicon steel
  • A semi-organic insulating coating for non-oriented silicon steel
  • A semi-organic insulating coating for non-oriented silicon steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The coating composition is composed of aluminum dihydrogen phosphate solution, water-soluble epoxy resin solution and dicyandiamide. The water-soluble epoxy resin reacts with amino-containing compounds such as epoxy group and diethanolamine, 2-aminoethyl-2-hydroxyethyl ether, tris(hydroxymethyl)aminomethane, N-aminoethylpiperidine, It is then neutralized with phosphoric acid to form a water-soluble epoxy resin species that forms a salt. The composition of the chromium-free insulating coating solution is shown in Table 1. After the coating solution is mixed evenly by mechanical stirring, it is applied on the surface of the steel plate with a diameter of 0.5mm by a roller coater, and the coating amount is kept at 1.0g / m 2 , baked with an open flame, and baked to form a film at a plate temperature of 200-500 °C. The coating performance results are shown in Table 2.

[0035] Table 1 Unit: parts by mass

[0036]

[0037] Table 2

[0038]

[0039] Note: (the same be...

Embodiment 2

[0046] The phosphate component is made of aluminum dihydrogen phosphate and zinc dihydrogen phosphate. The water-soluble epoxy resin is a water-soluble epoxy resin variety formed by the reaction of epoxy groups with amino acids, aminobenzoic acid, aminobenzenesulfonic acid and other compounds. The curing agent Use methyl etherified melamine resin, add according to the ratio shown in Table 3, use mechanical stirring to dissolve each substance to form a chrome-free coating solution, use a roller coater to apply the coating solution on the surface of the steel plate after 0.5mm, keep the coating Application amount is 1.2g / m 2 , baked with an open flame, and baked to form a film at a plate temperature of 200-500 °C. The coating performance results are shown in Table 4.

[0047] Table 3 Units: parts by mass

[0048]

[0049] Table 4

[0050]

[0051]

[0052] It can be seen from Table 4 that by using aluminum dihydrogen phosphate / zinc, water-soluble epoxy resin and meth...

Embodiment 3

[0054] The coating composition is composed of dihydrogen phosphate, water-soluble epoxy resin solution and curing agent. The water-soluble epoxy resin reacts with amino-containing compounds such as epoxy group and diethanolamine, 2-aminoethyl-2-hydroxyethyl ether, tris(hydroxymethyl)aminomethane, N-aminoethylpiperidine, It is then neutralized with phosphoric acid to form a water-soluble epoxy resin species that forms a salt. The curing agent adopts urea formaldehyde resin, melamine formaldehyde resin and benzomelamine formaldehyde resin.

[0055] The composition of the chromium-free insulating coating solution is shown in Table 5. After the coating solution is mixed evenly by mechanical stirring, it is applied on the surface of the steel plate with a diameter of 0.5mm by a roller coater, and the coating amount is kept at 1.1g / m 2 , baked with an open flame, and baked to form a film at a plate temperature of 200-500 °C. The coating performance results are shown in Table 2.

...

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Abstract

The invention relates to a semi-organic insulating coating paint for non-oriented silicon steel. The semi-organic insulating coating paint comprises the following components in parts by weight: 100 parts of metal dihydric phosphate, 5-100 parts of water-soluble epoxy resin dispersoid, 0.25-100 parts of amine resin or melamine and dicyandiamide and 100-2000 parts of pure water. The semi-organic insulating coating paint does not contain chromium, can be used for preparing a non-oriented silicon steel surface coating with good corrosion resistance, adhesiveness and heat resistance and can meet the requirements to the insulating performance of the coating in the fields of generators, transformers, compressors and the like.

Description

technical field [0001] The invention relates to an insulating coating for non-oriented silicon steel, in particular to a chromium-free semi-organic insulating coating for non-oriented silicon steel, which does not contain chromium and can be prepared with good corrosion resistance, adhesion and heat resistance The surface coating of non-oriented silicon steel meets the requirements for the insulation performance of the coating in the fields of motors, transformers, and compressors. Background technique [0002] In order to reduce the eddy current loss of the core, the surface of the non-oriented silicon steel sheet needs to be coated with an insulating coating. Since the core processing process needs to go through a series of processes such as slitting, stamping, riveting, annealing, and bluing, the insulating coating should not only have excellent insulation performance, but also have excellent adhesion, so that it can be used during the processing process. The middle coat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D5/25C09D5/08C09D7/12
Inventor 许云鹏李登峰吉亚明陈卓雷黄杰赵自鹏卢锡江章培莉
Owner BAOSHAN IRON & STEEL CO LTD
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