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Corrosion and wear resistant insulating varnish and preparation method thereof

A wear-resistant and insulating paint technology, used in anti-corrosion coatings, coatings, etc., can solve problems such as single performance, and achieve the effect of high insulation performance, good performance, excellent corrosion resistance and wear resistance.

Inactive Publication Date: 2015-07-15
朱滨
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Insulating varnish is mainly used to impregnate coils and other insulating parts of motors and electrical appliances to fill their gaps and micropores. After drying, insulating varnish can solidify the impregnated object into a dense whole, thereby improving its breakdown strength , mechanical properties, moisture resistance, heat resistance, thermal conductivity and oxidation resistance; due to the different environments in which motors and appliances are used, the performance requirements for insulating varnish are also different. Higher requirements are also put forward, but the insulating varnishes currently on the market are generally single-performance paints, and insulating varnishes with better corrosion resistance, wear resistance and insulation performance are urgently needed to be developed.

Method used

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  • Corrosion and wear resistant insulating varnish and preparation method thereof

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preparation example Construction

[0028] The present invention also includes a preparation method of corrosion-resistant and wear-resistant insulating varnish, comprising the following steps:

[0029] ① Add formaldehyde to xylene, add mixed acid to it dropwise, control the temperature during dropping at 30~40°C, reflux for 5~7 hours after dropping, let stand to obtain a mixed solution, and separate the mixed solution after standing , the upper layer is a xylene formaldehyde resin, and the lower floor is water, remove the water in the lower layer to obtain a xylene formaldehyde resin; the mass ratio of the formaldehyde, xylene and mixed acid is 1~2:3~4:1; the mixed acid It is obtained by mixing sulfuric acid and acetic acid in a molar ratio of 1:1;

[0030] ② Add phenol to the xylene formaldehyde resin obtained in step ①, raise the temperature to 80-90°C and keep it for 1-2 hours to obtain a reaction solution, cool the reaction solution to 20-30°C, add sodium hydroxide to adjust the pH of the reaction solution ...

Embodiment 1

[0044] A corrosion-resistant and wear-resistant insulating paint, which consists of the following components in parts by weight: 20 parts of xylene modified phenolic resin, 30 parts of lauric acid modified alkyd resin, 25 parts of phenyltrimethylsilane, butyl acrylate 5 parts of ester, 2 parts of kaolin, 4 parts of mica powder, 5 parts of hydroxyethyl cellulose, 30 parts of isophorone diisocyanate, 1 part of dibutyltin dilaurate, 4 parts of dioctyl terephthalate, hydrogenated castor 2 parts of sesame oil, 1 part of cocamidopropyl betaine and 10 parts of tert-butyl methacrylate.

[0045] The preparation method comprises the following steps:

[0046] ① Add formaldehyde to xylene, add mixed acid to it dropwise, control the dropwise temperature at 30°C, reflux for 5 hours after the dropwise addition, and let it stand still to obtain a mixed solution. Toluene formaldehyde resin, the lower layer is water, remove the water in the lower layer to obtain xylene formaldehyde resin; the ...

Embodiment 2

[0053] A corrosion-resistant and wear-resistant insulating paint, which consists of the following components in parts by weight: 30 parts of xylene modified phenolic resin, 40 parts of lauric acid modified alkyd resin, 40 parts of phenyltrimethylsilane, butyl acrylate 20 parts of ester, 5 parts of kaolin, 10 parts of mica powder, 8 parts of hydroxyethyl cellulose, 40 parts of isophorone diisocyanate, 3 parts of dibutyltin dilaurate, 8 parts of dioctyl terephthalate, hydrogenated castor 5 parts of sesame oil, 3 parts of cocamidopropyl betaine and 15 parts of tert-butyl methacrylate.

[0054] The preparation method comprises the following steps:

[0055] ① Add formaldehyde to xylene, add mixed acid to it dropwise, control the temperature during dropping at 40°C, reflux for 7 hours after dropping, and let stand to obtain a mixed solution. Toluene formaldehyde resin, the lower layer is water, remove the water in the lower layer to obtain xylene formaldehyde resin; the mass ratio ...

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Abstract

The invention discloses corrosion and wear resistant insulating varnish. The insulating varnish mainly comprises the following components: xylene modified phenolic resin, lauric acid modified alkyd resin, phenyltrimethylsilane, butyl acrylate, kaolin, isophorone diisocyanate, dibutyltin dilaurate and tert-butyl methacrylate. The corrosion and wear resistant insulating varnish has the advantages that the corrosion and wear resistant insulating varnish is an H-level insulating material and has good insulating properties; the insulating varnish also has excellent corrosion and wear resistance; the breakdown strength of a film is higher than 100kV / mm and the volume resistivity is 1018ohm.cm; the film is continuously heated for 200 hours in a range of 250+ / -2 DEG C; the breakdown strength of the film is about 55kV / mm and the volume resistivity (in heat state) is 1015ohm.cm; the film shows better properties in acid-base resistance experiments (48h) and does not wrinkle, fall off or fade; wear resistance experiments show that the insulating varnish has good wear resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a corrosion-resistant and wear-resistant insulating varnish and a preparation method thereof. Background technique [0002] As a special paint in paint, insulating varnish is an important insulating material that is based on high molecular polymer and can be cured into an insulating film or an insulating whole under certain conditions. It is mainly composed of film-forming materials and auxiliary materials. The film-forming materials are mainly It is resin, asphalt, dry oil, etc. The auxiliary materials do not participate in film formation, and the main function is to adjust viscosity and dissolve film-forming substances. [0003] Insulating varnish is mainly used to impregnate coils and other insulating parts of motors and electrical appliances to fill their gaps and micropores. After drying, insulating varnish can solidify the impregnated object into a dense whole, thereby imp...

Claims

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Application Information

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IPC IPC(8): C09D4/02C09D4/06C09D5/25C09D5/08C09D7/12
Inventor 张娟杨彪朱滨
Owner 朱滨
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