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Aqueous environment-friendly insulation coating of anti-settling electric steel and preparation method thereof

An insulating coating and anti-settling technology, which is applied in coatings, metal material coating processes, etc., can solve the problems of poor anti-settling properties of thickeners, failure to meet actual requirements, high thixotropic properties of coatings, etc.

Inactive Publication Date: 2013-02-13
SHANGHAI QIJIA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, when most thickeners are used as anti-settling agents in electrical steel water-based coatings, they cannot endow the coatings with high thixotropic properties. The screening of anti-settling agents and their application in water-based environmental protection coatings have certain The anti-settling performance of thickeners used in some existing water-based environmental protection coatings for electrical steel is not satisfactory, and cannot meet the actual requirements of modern industrial production
[0011] At present, there is no patent report on the water-based environmentally friendly insulating coating for electrical steel that can resist subsidence for a long period of time (more than 1 week) or its preparation method in China

Method used

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  • Aqueous environment-friendly insulation coating of anti-settling electric steel and preparation method thereof
  • Aqueous environment-friendly insulation coating of anti-settling electric steel and preparation method thereof
  • Aqueous environment-friendly insulation coating of anti-settling electric steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Example 1: No. No.1

[0088] According to the following proportions, the anti-settling electrical steel water-based environmental protection insulating paint of the present invention is prepared:

[0089] Aluminum dihydrogen phosphate: 35%

[0090] Silica sol: 4%

[0091] Phosphoric acid: 3%

[0092] Nitric acid: 0.5%

[0093] Magnesium Oxide: 2.5%

[0094] Rare earth salt mixed solution: 2.5%

[0095] Silane coupling agent: 0.5%

[0096] Anti-settling additive: 15%

[0097] The rest is solvent water.

[0098] In this embodiment, the rare earth salt mixed solution is a solution of rare earth salt, peroxide, buffer and nitric acid, and its mixing ratio is:

[0099] Rare earth salt: 1%

[0100] Peroxide: 3%

[0101] Buffer: 2%

[0102] Nitric acid: 0.6%

[0103] The rest is solvent water.

[0104] In this embodiment, the rare earth salt in the rare earth salt mixed solution is selected from cerium nitrate and praseodymium chloride, and the mass ratio thereof ...

Embodiment 2

[0121] Example 2: Number No.2

[0122] Except following difference, other is the same as embodiment 1, according to following ratio, preparation anti-settling electrical steel water-based environmental protection insulating paint of the present invention:

[0123] Aluminum dihydrogen phosphate: 45%

[0124] Silica sol: 3.5%

[0125] Phosphoric acid: 8%

[0126] Nitric acid: 0.8%

[0127] Magnesium Oxide: 2.5%

[0128] Rare earth salt mixed solution: 3%

[0129] Silane coupling agent: 1.5%

[0130] Anti-settling additive: 12%

[0131] The rest is solvent water.

[0132] In this embodiment, the rare earth salt mixed solution is a solution of rare earth salt, peroxide, buffer and nitric acid, and its mixing ratio is:

[0133] Rare earth salts: 1.5%

[0134] Peroxide: 2%

[0135] Buffer: 2%

[0136] Nitric acid: 0.5%

[0137] The rest is solvent water.

[0138] In this embodiment, the rare earth salt in the rare earth salt mixed solution is selected from neodymium nit...

Embodiment 3

[0147] Embodiment 3: Number No.3

[0148] Except following difference, other is the same as embodiment 1, according to following ratio, preparation anti-settling electrical steel water-based environmental protection insulating paint of the present invention:

[0149] Aluminum dihydrogen phosphate: 30%

[0150] Silica sol: 4%

[0151] Phosphoric acid: 7%

[0152] Nitric acid: 0.7%

[0153] Rare earth salt mixed solution: 2%

[0154] Magnesium Oxide: 2%

[0155] Silane coupling agent: 1%

[0156] Anti-settling additive: 17%

[0157] The rest is solvent water.

[0158] In this embodiment, the rare earth salt mixed solution is a solution of cerium nitrate, cerous chloride, praseodymium chloride mixture, sodium peroxide, boric acid and nitric acid, and its mixing ratio is:

[0159] Rare earth salts: 1.5%

[0160] Sodium peroxide: 2%

[0161] Boric acid: 2%

[0162] Nitric acid: 0.5%

[0163] The mixing ratio of cerium nitrate, cerous chloride and praseodymium chloride i...

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Abstract

The invention relates to an aqueous environment-friendly insulation coating of anti-settling electric steel and a preparation method thereof. The insulation coating is formulated from the following components by mass percent: 20-60% of aluminium dihydrogen phosphate, 0.5-5% of silica solution, 1-10% of phosphoric acid, 0.3-2% of nitric acid, 1-5% of magnesium oxide, 0.3-5.5% of rare earth-salt blended solution, 0.5-5.5% of silane coupling agents, 3-20% of anti-settling additives, and the balance of solvent water. In the invention, conventional roller painting technology is adopted for coating and then a film can be made by proper high-temperature solidification. By multiple actions of physical covering, chemical passivation, phosphorization and the like, a surface insulation coating of a cold rolling electric steel plate without orientation has the advantages of good adhesiveness, high insulativity (namely resistance and puncture voltage between high-rises), high corrosion resistance, high temperature resistance and the like, as well as environmental protection without chrome or harmful ions. The insulation coating is widely applicable to the surface coating of the cold rolling electric steel plate without orientation, has a better anti-settling property, better dispersity and a better levelling property, leads coating operation on site to be more convenient and faster, and can effectively avoid the segregation of paint ingredients and the fluctuation of coating performances.

Description

technical field [0001] The present invention relates to the field of metal surface treatment, more specifically, the present invention relates to an anti-settling electrical steel water-based environmental protection insulating coating and its preparation method, the coating of the present invention is used to more conveniently and stably manufacture the surface of cold-rolled non-oriented electrical steel sheet Eco-friendly insulating coating. Background technique [0002] Electrical steel (also known as silicon steel) is a silicon-iron soft magnetic alloy with extremely low carbon content. It has a wide range of uses and can be used to manufacture motors, generators, transformers and ballast cores. Indispensable important magnetic material. The demand for electrical steel in a country is roughly proportional to its power generation. With the rapid increase of my country's planned power generation installed capacity, coupled with the aging of my country's power grid equipm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/25C09D7/02C09D7/45
CPCC23C22/74
Inventor 艾宝魁齐慧滨林安方达经张弦
Owner SHANGHAI QIJIA CHEM
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