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High-temperature-resistant insulation coating and preparation method thereof

A technology of insulating coatings and high temperature resistance, applied in the direction of anti-corrosion coatings, coatings, etc., to achieve the effect of good surface smoothness, not easy to precipitate, and strong adhesion

Inactive Publication Date: 2019-06-18
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing inorganic coatings still have deficiencies in one or more performances such as adhesion, corrosion resistance, corrosion, heat resistance, shock resistance, weather resistance, foaming, stability, etc.

Method used

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  • High-temperature-resistant insulation coating and preparation method thereof
  • High-temperature-resistant insulation coating and preparation method thereof
  • High-temperature-resistant insulation coating and preparation method thereof

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preparation example Construction

[0031] (1) Preparation of phosphate solution: phosphoric acid solution and metal hydroxide are placed in a reaction vessel and mixed and heated to a boiling state for reaction until the reaction system becomes transparent and the transparency no longer increases; then, the reaction system is cooled to room temperature, and aging at room temperature for more than 12 hours, preferably aging for 12 hours to 36 hours, to obtain a phosphate solution;

[0032] (2) Preparation of high temperature resistant insulating coating: add spherical powder, diluent and optional boric acid into the phosphate solution, mix the materials by ball milling for more than 2 hours after stirring evenly, preferably ball milling for 2 hours to 8 hours, Thus the high temperature resistant insulating coating is obtained.

Embodiment 1

[0035] Embodiment 1: Preparation of aluminum phosphate salt solution

[0036] Weigh 230g of 85% concentration phosphoric acid, Al(OH) 3 50g of the powder was placed in a reaction vessel and stirred evenly. Stir the reaction and heat up to boiling state, stop heating after the reaction system is transparent. The reaction system was cooled to room temperature and aged for 12 hours.

Embodiment 2

[0037] Embodiment 2: preparation magnesium phosphate salt and aluminum phosphate salt solution

[0038] Weigh 290g of 85% concentrated phosphoric acid, Al(OH) 3 Powder 50g, Mg(OH) 2 15g of powder, placed in a reaction vessel and stirred evenly. Stir the reaction and heat up to boiling state, stop heating after the reaction system is transparent. The reaction system was cooled to room temperature and aged for 16 hours.

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Abstract

The invention relates to a high-temperature-resistant insulation coating and a preparation method thereof. The high-temperature-resistant insulation coating comprises or consists of the following components: a phosphate solution, spherical powder, a diluent and optional boric acid. The method comprises the following steps: the preparation of the phosphate solution heating a phosphoric acid solution and metal hydroxide to a boiling state and keeping till a reaction system becomes transparent, then cooling to room temperature and aging for 12 hours; and the preparation of the high-temperature-resistant insulation coating: adding the spherical powder, the diluent and the optional boric acid, uniformly stirring and then performing ball milling. According to the coating involved in the invention, a stable coating layer is formed under curing action of 100-130 DEG C; the usage temperature of the high-temperature-resistant insulation coating reaches up to 1000 DEG; the high-temperature-resistant insulation coating can be applied to the surface of a conductor so as to play the role of insulation and corrosion protection; the composition of the coating is stable in property; and the high-temperature-resistant insulation coating can be placed for a long time after being prepared.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a high-temperature-resistant insulating coating and a preparation method thereof. Background technique [0002] With the rapid development of industries such as aviation, aerospace, automobiles and weapons, the requirements for material protection are getting higher and higher. Some components need to work in high temperature and corrosive environments, and at the same time have physical properties such as fatigue resistance and thermal shock resistance. and insulation and other functional properties. Insulating coatings have excellent electrical insulation properties and are widely used in the field of electrical performance components. Organic insulating coatings are prone to aging and do not have flame retardant function. The inorganic coating has the characteristics of high temperature resistance, corrosion resistance, and no mildew, which can protect the substrate for a long time. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/25C09D5/08
Inventor 王华栋董衡李淑琴李争瑞
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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