A kind of water-soluble polyester imide insulating paint and preparation method thereof

A technology of polyester imide and insulating varnish, applied in the direction of coating, etc., can solve the problems of poor mechanical strength and poor heat resistance of water-based insulating varnish, achieve high sealing efficiency, improve mechanical strength, and improve hydrolysis resistance Effect

Active Publication Date: 2021-04-23
湖北长海新能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above technical deficiencies, to propose a water-soluble polyester imide insulating varnish, to solve the technical problems of poor mechanical strength and poor heat resistance of the current water-based insulating varnish; another purpose of the present invention is to provide A kind of preparation method of water-soluble polyester imide insulating varnish

Method used

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  • A kind of water-soluble polyester imide insulating paint and preparation method thereof

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preparation example Construction

[0029] Present embodiment also provides a kind of preparation method of water-soluble polyester imide insulating varnish, comprises the steps:

[0030] (1) prepare materials by parts by weight of each raw material;

[0031] (2) Add ordinary diols, polyols, diamines and polybasic anhydrides into a reaction flask equipped with a stirring device, a temperature control device and a reflux condensation device, heat the mixture to 140-160°C, and wait for the mixture to melt Then start stirring, continue to heat up the molten mixture to 160-190°C, and start to cool down after imide reaction for 3-5 hours; when the temperature of the mixture drops to 80-100°C, add dibasic acid and / or Or dibasic acid anhydride, hydrophilic functional diol, slowly raise the temperature of the mixed liquid to 160-190°C, after 2-4 hours of esterification, then raise the temperature of the mixed liquid to 190-220°C, polycondensation reaction 4 ~6h, when the acid value reaches 40~70mgKOH / g, start to cool d...

Embodiment 1

[0040] Embodiment 1 of the present invention provides a kind of water-soluble polyester imide insulating varnish, and it comprises the raw material of following weight: neopentyl glycol 73.7g, trimethylol propane 26.8g, diaminodiphenyl ether 8g, partial 15.4g of benzenetricarboxylic anhydride, 65.2g of isophthalic acid, 29.2g of adipic acid, 51.5g of phthalic anhydride, 23.1g of 2,2-dimethylolpropionic acid, 22.5g of glycidyl tert-carbonate, ethylene glycol monobutyl ether 118 g, N,N-dimethylethanolamine 24 g, Cymel 325 amino resin 100 g and water 1200 g.

[0041] Present embodiment also provides the preparation method of this water-soluble polyester imide insulating varnish, comprises the steps:

[0042] 73.7g neopentyl glycol, 26.8g trimethylolpropane, 8g diaminodiphenyl ether, 15.4g trimellitic anhydride are added in the reaction bottle that stirring device, temperature control device and reflux condensation device are housed, react Slowly heat the bottle to 140°C, start s...

Embodiment 2

[0044] Embodiment 2 of the present invention provides a kind of water-soluble polyester imide insulating varnish, and it comprises the raw material of following weight: 1,4 cyclohexanedimethanol 76.1g, trimethylolpropane 53.6g, diaminodiphenyl 4g of methane, 7.68g of trimellitic anhydride, 23.6g of succinic acid, 45.2g of isophthalic acid, 77.4g of phthalic acid, 23.1g of 2,2-dimethylolpropionic acid, 20g of glycidyl tertiary carbonate , ethylene glycol monobutyl ether 122g, N,N-dimethylethanolamine 22g, INEOS Resimene 717 amino resin 100g and water 1200g.

[0045] Present embodiment also provides the preparation method of this water-soluble polyester imide insulating varnish, comprises the steps:

[0046] Add 76.1g of 1,4-cyclohexanedimethanol, 53.6g of trimethylolpropane, 4g of diaminodiphenylmethane, and 7.68g of trimellitic anhydride into a reaction flask equipped with a stirring device, a temperature control device and a reflux condensing device In the process, the react...

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Abstract

The invention discloses a water-soluble polyester imide insulating varnish, which comprises the following components in parts by weight: 145-200 parts of dibasic acid and / or dibasic acid anhydride, 7.5-16 parts of polybasic acid anhydride, dibasic alcohol 90 to 160 parts, 18 to 55 parts of polyols, 2 to 8 parts of diamines and 18 to 23 parts of glycidyl tertiary carbonic acid esters, the diols include hydrophilic functional diols, and the hydrophilic functional The dihydric alcohol is a dihydric alcohol containing a carboxyl group and / or a sulfonic acid group. The present invention introduces hydrophilic functional diols and polyols into the molecular chain of polyester imide, so that the molecular chain contains a certain amount of hydroxyl, carboxyl and / or sulfonate groups, thereby endowing the entire polyester imide The imine molecular chain is water-soluble and provides cross-linking points for intermolecular cross-linking reactions, thereby improving properties such as mechanical strength, heat resistance, water resistance, and storage stability. The invention also provides a preparation method of the water-soluble polyester-imide insulating varnish.

Description

technical field [0001] The invention relates to the technical field of insulating impregnating resins, in particular to a water-soluble polyester-imide insulating varnish and a preparation method thereof. Background technique [0002] During the insulation impregnation process of various domestic motor manufacturers, the insulation impregnation varnish used contains a large amount of flammable, explosive, toxic and harmful solvents or thinners such as toluene, xylene, styrene, solvent oil, etc., which inevitably causes factories Environmental pollution and human health damage. With the continuous improvement of environmental protection requirements in various countries, the materials used in motor products exported to foreign countries are being restricted more and more strictly. Therefore, the development and application of environmentally friendly insulating impregnating varnishes with low viscosity and low organic volatile content are imminent. [0003] At present, water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D161/20C09D5/25C08G73/16
CPCC08G73/16C09D5/00C09D179/08C08L61/20
Inventor 唐勇军杨丽君罗剑王晓梅徐志军
Owner 湖北长海新能源科技有限公司
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