A kind of water-based insulating varnish and preparation method thereof

A kind of insulating paint, water-based technology, applied in the direction of coating, anti-corrosion coating, fire-proof coating, etc., can solve the problems of poor electrical insulation performance, accelerated bearing rust, poor storage stability, etc., to achieve improved adhesion and bridging ability , High water absorption effect

Active Publication Date: 2020-08-11
山东晟宇涂业股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-based insulating varnish prepared by the preparation method overcomes the water-based insulating varnish in the prior art, which more or less exists in the addition of co-solvents or organic small molecules generated during the curing process will remain in the motor, and during use It will damage the anti-rust oil on the bearing, accelerate the rust of the bearing, make the motor generate noise, have poor hydrolysis resistance, poor storage stability, low mechanical strength after curing, poor heat resistance, and high water absorption, so that it can be electrically insulated The technical problem of poor performance, with more excellent electrical properties, heat resistance, chemical resistance, mechanical properties and flame retardancy

Method used

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  • A kind of water-based insulating varnish and preparation method thereof

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Effect test

Embodiment 1

[0027] A water-based insulating varnish, made of the following components in parts by weight: 60 parts of polyether modified dimethylolhydantoin silicone polycondensate, 20 parts of polyurethane modified hyperbranched polyethyleneimine, surface modified nano boron fiber 5 parts, 1 part of polyoxyethylene polyoxypropanol amine ether, 1 part of polyacrylate leveling agent, 1 part of 2-amino-2-methyl-1-propanol, 1 part of ethanol, 20 parts of water.

[0028] The preparation method of polyether modified dimethylol hydantoin polycondensate comprises the steps of:

[0029] ⅠIn a three-neck flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, add 10g of dimethylolhydantoin, 11.2g of 1-chloropropylmethyldiethoxysilane, 60g of dimethyl sulfoxide and a catalyst 3g of dibutyltin dilaurate, raise the temperature to 75°C, add 1g of distilled water dropwise, stir and react at 90°C for 15 hours, and then remove dimethyl sulfoxide by rotary evaporation to obta...

Embodiment 2

[0035]A water-based insulating varnish, made of the following components in parts by weight: 63 parts of polyether-modified dimethylolhydantoin silicone polycondensate, 23 parts of polyurethane-modified hyperbranched polyethyleneimine, surface-modified nano boron fiber 6 parts, 2 parts of polydimethylsiloxane, 2 parts of cellulose acetate leveling agent, 2 parts of triethanolamine, 2 parts of isopropanol, 23 parts of water.

[0036] The preparation method of polyether modified dimethylol hydantoin polycondensate comprises the steps of:

[0037] ⅠIn a three-neck flask equipped with a stirrer, a thermometer, and a constant pressure dropping funnel, add 10 g of dimethylolhydantoin, 11.2 g of 1-chloropropylmethyldiethoxysilane, and N,N-dimethyl Formamide 70g and catalyst dibutyltin dilaurate 4g, raise the temperature to 78°C, then add 2g of distilled water dropwise, stir and react at 93°C for 16 hours, and then spin evaporate to remove N,N-dimethylformamide to obtain intermediate ...

Embodiment 3

[0043] A water-based insulating paint, made of the following components in parts by weight: 65 parts of polyether-modified dimethylolhydantoin silicone polycondensate, 25 parts of polyurethane-modified hyperbranched polyethyleneimine, surface-modified nano boron fiber 8 parts, polyoxypropylene glyceryl ether 3 parts, polyvinyl butyral leveling agent 3 parts, dimethylethanolamine 3 parts, ethylene glycol 3 parts, water 25 parts.

[0044] The preparation method of polyether modified dimethylol hydantoin polycondensate comprises the steps of:

[0045] ⅠIn a three-necked flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, add 10g of dimethylolhydantoin, 11.2g of 1-chloropropylmethyldiethoxysilane, 80g of N-methylpyrrolidone and The catalyst is 5g of dibutyltin dilaurate, raise the temperature to 80°C, then add 3g of distilled water dropwise, stir and react at 95°C for 16.5 hours, and then spin evaporate to remove N-methylpyrrolidone to obtain an i...

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Abstract

The invention provides a water-based insulating varnish. The water-based insulating varnish is prepared from the following components in parts by weight: 60-70 parts of polyether modified imidazolidinedione organosilicon polycondensate, 20-30 parts of polyurethane modified hyperbranchedpolyethyleneimine, 5-10 parts of surface-modified boron nanofiber, 1-5 parts of a defoaming agent, 1-5 parts of aflatting agent, 1-3 parts of a neutralization stabilizer, 1-5 parts of a cosolvent, and 20-30 parts of water. The invention further discloses a preparation method of the water-based insulating varnish. The prepared water-based insulating varnish has more excellent electric performance, heat resistance, chemical resistance, mechanical performance and fire resistance, and the use is safer and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of insulating varnish, in particular to a water-based insulating varnish and a preparation method thereof. Background technique [0002] In recent years, with the popularization of motors and electrical products, insulating varnish, one of the indispensable materials in motor and electrical equipment, has achieved rapid development. Insulating varnish is an insulating material based on a high molecular polymer that can be cured into an insulating film or an insulator. It is a special coating. It not only has insulating properties, but also has impregnating and sealing functions, can penetrate into various substrates, and play an insulating role in various electrical appliances. [0003] At present, there are mainly two types of insulating varnish on the market: oil-based and water-based. Oil-based insulating varnish has excellent comprehensive performance and good insulation performance, but it needs to use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/12C09D187/00C09D5/25C09D5/18C09D5/08
CPCC08K2201/011C08L2201/02C08L2201/08C08L2205/035C09D5/00C09D5/08C09D5/18C09D183/12C08L87/00C08L71/02C08L33/04C08K9/06C08K7/06
Inventor 不公告发明人
Owner 山东晟宇涂业股份有限公司
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