Insulating paint and preparation method thereof

A technology of insulating varnish and nano-carbon crystal, which is applied in the field of coatings, can solve the problems of low output of solvent-free insulating varnish and high-solid insulating varnish, failure to meet market demand, and accelerated insulation aging speed, so as to improve microhardness and plumpness Good, no toxic side effects

Active Publication Date: 2016-07-20
HENAN YUXING MICRON DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, some insulating materials will hinder the heat loss of the motor due to high-speed rotation and electric shock to a certain extent, and the accumulation of heat will accelerate the aging of the insulation, thereby shortening the service life of the motor
[0003] At present, several types of insulating varnishes commonly used have their shortcomings: traditional solvent-based insulating varnishes will have a large amount of organic solvents volatilized during the curing process, polluting the environment; and solvent-free insulating varnishes and high-solid insulating varnishes There are problems of small output and high production cost, which cannot meet market demand

Method used

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  • Insulating paint and preparation method thereof
  • Insulating paint and preparation method thereof
  • Insulating paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of embodiment 1 nanometer carbon crystal

[0029] Its process flow diagram is as follows figure 1 As shown, the steps are:

[0030] (1) Preliminary crushing: firstly, the diamond raw material is sent into the crushing cavity of the mechanical crusher, and is crushed by the high-speed rotating hammer head inside the crusher. The material stays in the crusher for re-crushing, and the granular material filtered through the finest sieve in the lower layer of the crusher is collected by the sieve plate (the mesh number of the sieve is not less than 32 mesh), while the material filtered by other mesh sieves can be used as Coarse materials are sold or used to prepare materials with other particle sizes; particles above 32 mesh are used for primary particle size separation by a multi-layer vibrating sieve machine. Cloth, the coarse material selected by the 40-mesh sieve is returned to the mechanical crusher for re-crushing, the material collected by the 40-mes...

Embodiment 2

[0035] An insulating varnish, made of the following raw materials in parts by weight: 25 parts of nano-carbon crystals, 35 parts of polyimide, 35 parts of epoxy resin, 1 part of dispersant, 1 part of leveling agent, corrosion inhibitor (phosphate 317) 0.5 parts, defoamer 2 parts, lysozyme 0.5 parts.

[0036]Wherein, the leveling agent is a mixture of silicone oil and polydimethylsiloxane, and the dosage ratio is 1:1.

[0037] The nano-carbon crystals are subjected to the following surface functionalization treatment: the nano-carbon crystals are added to concentrated HNO 3 and concentrated H 2 SO 4 In the mixed solution, heated to reflux and centrifuged, the precipitate was washed with deionized water until the pH was 6.0, and the molar concentration was 0.1mol L - 1 Na 2 SiO 3 9H 2 Wash with O solution, ultrasonically disperse for 1 h, and then use a molar concentration of 0.1mol L -1 After washing with HCL and ultrasonically dispersing for 2 hours, wash with deionize...

Embodiment 3

[0040] An insulating varnish, made of the following raw materials in parts by weight: 5 parts of nano-carbon crystals, 40 parts of polyimide, 50 parts of epoxy resin, 0.1 part of dispersant, 0.1 part of leveling agent, corrosion inhibitor (phosphate 317) 0.2 parts, defoamer 1.6 parts, lysozyme 3 parts.

[0041] The nano-carbon crystals are subjected to the following surface functionalization treatment: the nano-carbon crystals are added to concentrated HNO 3 and concentrated H 2 SO 4 In the mixed solution, heated to reflux and centrifuged, the precipitate was washed with deionized water until the pH was 5.0, and the molar concentration was 0.5mol L - 1 Na 2 SiO 3 9H 2 Wash with O solution, ultrasonically disperse for 2 hours, and then use a molar concentration of 0.5mol L -1 After washing with HCL and ultrasonic dispersion for 1, wash with deionized water and dry; the concentrated HNO 3 and concentrated H 2 SO 4 The mass ratio is 1:5.

[0042] Among them, the leveli...

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Abstract

The invention discloses insulating paint and belongs to the technical field of paint. The insulating paint is prepared from, by weight, 5-20 parts of nano carbon crystal, 25-40 parts of polyimide, 30-50 parts of epoxy resin, 0.1-1 part of a dispersant, 0.1-2 parts of flatting agent, 0.2-1.0 part of a corrosion inhibitor, 0.1-2 parts of a defoamer and 0.1-3 parts of lysozyme. A preparation method of the insulating paint includes: mixing polyimide with the epoxy resin at 65-80 DEG C; adding nano carbon crystal, the dispersant, the flatting agent, the corrosion inhibitor, the defoamer and lysozyme; stirring. Raw materials are reasonably combined to form the waterborne insulating paint, and the insulating paint has good insulativity, adhesiveness and cohesiveness, a paint film is high in hardness and fullness, the surface of the paint film is uniform, compact, smooth and micropore-free, and the insulating paint has good mechanical performance, wear resistance and scratch resistance.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an insulating varnish and a preparation method thereof. Background technique [0002] Insulating varnish, also known as insulating paint, is a branch of insulating materials. It is widely used in aerospace industry, aircraft manufacturing, electronics industry, household appliances and other industries, but it is currently used as insulating varnish for coating protection of some equipment in these industries. The insulation performance of the insulation can no longer meet the work requirements. For example: Some aviation motors need to work in an environment above 200°C for a long time or in an environment of 290°C for a short period of time. During the working process, the temperature may even reach as high as 400-500°C. Insulation performance under hot and humid conditions is also one of the keys to the manufacturing industry of aerospace electrical products. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D163/00C09D5/25C09D5/14C09D7/12
CPCC08K2201/011C08L2201/08C08L2205/035C09D5/14C09D7/61C09D7/65C09D163/00C09D179/08C08L63/00C08K9/02C08K3/04C08L79/08
Inventor 张洪涛刘君丽王俊芝薛胜辉何本锋武艳强杨晋中
Owner HENAN YUXING MICRON DIAMOND CO LTD
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