Preparation method and application of moisture-proof modified electrical-grade magnesium oxide

An electrical grade, magnesia technology, which is applied in magnesia, chemical instruments and methods, dyed organosilicon compound treatment, etc., can solve the problem of incomplete wrapping of modifiers, achieve improved hydration resistance and insulation performance, and save energy The effect of dosage

Active Publication Date: 2019-01-04
LIAONING JIASHUN CHEM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect of incomplete wrapping of modifiers in the existing production process of moisture-proof electrical grade magnesium oxide. To achieve this purpose, the present invention provides a moisture-proof modified electrical grade magnesium oxide and a preparation method thereof, comprising the following steps :

Method used

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Examples

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preparation example Construction

[0012] The invention provides a moisture-proof modified electrical grade magnesium oxide and a preparation method thereof, comprising the following steps:

[0013] S1. Mix the electrical grade magnesia powder with a particle size of 45-270 μm and the silicon oxide additive to prepare the electrical grade magnesium oxide base material. The weight ratio of the electrical grade magnesium oxide powder and the silicon oxide additive is 1:( 0.004~0.01);

[0014] S2. Mix the silicone moisture-proof agent and the diluent evenly to prepare the alkyl mixture of the silicone moisture-proof agent, the weight ratio of the silicone moisture-proof agent and the diluent is 1: (0.2-0.5);

[0015] S3. Electrostatically spray the organic silicon moisture-proof agent alkyl mixture on the electrical grade magnesium oxide base material and mix and stir to obtain a modified electrical grade magnesium oxide powder. The electrical grade magnesium oxide base material and the organic silicon moisture-pr...

Embodiment 1

[0028] 1) Screen electrical grade magnesium oxide powder with a particle size of 45-270 μm, mix it with silicon dioxide to obtain electrical grade magnesium oxide base material, and the weight ratio of the electrical grade magnesium oxide powder to silicon dioxide is 1: 0.06;

[0029] 2) Mix methyl hydrogen-containing silicone oil and xylene uniformly at a weight ratio of 1:0.33 to obtain a silicone moisture-proof agent silane mixture;

[0030] 3) Electrostatically spray the organic silicon moisture-proof agent alkyl mixture on the electrical grade magnesium oxide base material and mix and stir to obtain a modified electrical grade magnesium oxide powder. The electrostatic high voltage of the electrostatic spraying is 30kV, and the spraying pressure is 0.3MPa. The weight ratio of the organic silicon moisture-proof agent silane mixture to the electrical grade magnesium oxide base material is 1:0.001;

[0031] 4) Dry the modified electrical grade magnesium oxide powder at 150° ...

Embodiment 2

[0033] 1) Screen electrical grade magnesium oxide powder with a particle size of 45-270 μm, mix it with silicon dioxide to obtain electrical grade magnesium oxide base material, and the weight ratio of the electrical grade magnesium oxide powder to silicon dioxide is 1: 0.06;

[0034] 2) Mix methyl silicone resin and toluene uniformly according to the weight ratio of 1:0.4 to obtain a silicone moisture-proof agent silane mixture;

[0035] 3) Electrostatically spray the organic silicon moisture-proof agent alkyl mixture on the electrical grade magnesium oxide base material and mix and stir to obtain a modified electrical grade magnesium oxide powder. The electrostatic high voltage of the electrostatic spraying is 50kV, and the spraying pressure is 0.4MPa. The weight ratio of the silicone moisture-proof agent silane mixture to the electrical grade magnesium oxide base material is 1:0.002;

[0036] 4) Drying the modified electrical grade magnesium oxide powder at 180°C to prepar...

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Abstract

The invention provides a preparation method of moisture-proof modified electrical-grade magnesium oxide. The preparation method comprises the steps that electrical-grade magnesium oxide powder and a silicon oxide assistant are mixed to prepare an electrical-grade magnesium oxide base material; an organic silicon moisture-proof agent and a diluent are mixed to prepare an organic silicon moisture-proof agent alkyl mixture; the organic silicon moisture-proof agent alkyl mixture is electrostatically sprayed to the electrical-grade magnesium oxide base material, mixing and stirring are performed toobtain modified electrical-grade magnesium oxide powder, and the moisture-proof modified electrical-grade magnesium oxide is prepared after drying. The invention also provides the moisture-proof modified electrical-grade magnesium oxide obtained through the above steps and application thereof. The moisture-proof modified electrical-grade magnesium oxide adopts the electrostatically sprayed organic silicon moisture-proof agent alkyl mixture, the organic silicon moisture-proof agent is uniformly sprayed to the surface of the electrical-grade magnesium oxide powder to form a hydrophobic dampproof coating, the moisture resistance, water resistance and insulation properties can be remarkably improved, the use amount of the organic silicon moisture-proof agent is saved, and the moisture-proof modified electrical-grade magnesium oxide is economic and friendly to the environment.

Description

technical field [0001] The invention relates to the technical field of production of electrical grade magnesium oxide, and more specifically, to a preparation method and application of a moisture-proof modified electrical grade magnesium oxide. Background technique [0002] Moisture-proof electrical grade magnesium oxide is one of the most important insulating and high-temperature resistant filling materials. It has excellent insulating properties and high thermal conductivity and is widely used in various electric heating elements. The production process of moisture-proof electrical grade magnesia is generally: fused magnesia abrasive → pouring silicone moisture-proof agent → stirring → cooling. In this process, the uniformity of the fused magnesia powder and silicone moisture-proof agent is difficult to control , Insufficient utilization of the silicone coating package. In order to further improve the insulation and moisture-proof ability of the moisture-proof electrical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/06C09C3/12C01F5/02
CPCC01F5/02C01P2006/40C01P2006/90C09C1/028C09C3/006
Inventor 倪忠伟王继奇史生川高斌倪奎皓
Owner LIAONING JIASHUN CHEM SCI & TECH CO LTD
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