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Water-soluble low-temperature curing polyurethane insulating varnish and its preparation method and application in electrical equipment

A water-soluble, polyurethane technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problem of high curing temperature, and achieve the effect of environmental protection and excellent water solubility

Active Publication Date: 2020-12-01
SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent uses phenolic resin as the main body, and on this basis, water-based alkyd polyester is synthesized, so that the cured paint film of the product has both the toughness and adhesion of alkyd polyester and the environmental resistance of phenolic resin, fast curing and drying. Although it achieves rapid curing at a lower temperature, it is not suitable for polyurethane resins, and the curing temperature is still high

Method used

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  • Water-soluble low-temperature curing polyurethane insulating varnish and its preparation method and application in electrical equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a water-soluble low-temperature curing polyurethane insulating varnish. In terms of parts by mass, the raw materials of the polyurethane insulating varnish include 250 parts of polyurethane resin, 8.8 parts of N,N-dimethylethanolamine, 75 parts of 325 resin, two 69 parts of ethylene glycol dimethyl ether, 0.025 parts of strontium cobalt ethoxide, 0.038 parts of 2-hydroxyethyl-1-tin sulfonate, 0.02 parts of nickel 2-pyridyl alcohol, the balance is water, and the solid content is adjusted to about 15%.

[0033] Among them, in parts by mass, the raw materials of the polyurethane resin include 34.3 parts of maleic anhydride, 39.9 parts of glutaric anhydride, 13.4 parts of 1,4-butanediol, 63 parts of diethylene glycol, trimethylolpropane 16 parts, 7.4 parts of glycerin, 8.5 parts of dihydroxypropionic acid, 3 parts of dimethylol butyric acid, 125 parts of diphenylmethane diisocyanate, 84 parts of 1,6-hexamethylene diisocyanate.

[0034] Preparation: ...

Embodiment 2

[0039] This embodiment provides a water-soluble low-temperature curing polyurethane insulating varnish. In terms of parts by mass, the raw materials of the polyurethane insulating varnish include 300 parts of polyurethane resin, 12 parts of N,N-dimethylethanolamine, 99 parts of 5303 resin, two 80 parts of ethylene glycol dimethyl ether, 0.033 parts of strontium cobalt ethoxide, 0.048 parts of 2-hydroxyethyl-1-tin sulfonate, 0.027 parts of nickel 2-pyridine ethoxide, the balance is water, and the solid content is adjusted to about 18%.

[0040] Wherein, in parts by mass, the raw materials of the polyurethane resin include 35 parts of maleic anhydride, 33.3 parts of glutaric anhydride, 24.1 parts of 1,4-butanediol, 85.1 parts of diethylene glycol, trimethylolpropane 26.8 parts, 4.6 parts of glycerin, 9.5 parts of dihydroxypropionic acid, 1.5 parts of dimethylol butyric acid, 200 parts of diphenylmethane diisocyanate, 33.6 parts of 1,6-hexamethylene diisocyanate.

[0041] Prepara...

Embodiment 3

[0046] This embodiment provides a water-soluble low-temperature curing polyurethane insulating varnish. In terms of parts by mass, the raw materials of the polyurethane insulating varnish include 300 parts of polyurethane resin, 15 parts of N,N-dimethylethanolamine, 105 parts of 325 resin, two 62 parts of ethylene glycol dimethyl ether, 0.036 parts of strontium cobalt ethoxide, 0.055 parts of 2-hydroxyethyl-1-tin sulfonate, 0.025 parts of nickel 2-pyridine ethoxide, the balance is water, and the solid content is adjusted to about 20%.

[0047] Wherein, in parts by mass, the raw materials of the polyurethane resin include 36.5 parts of maleic anhydride, 28.3 parts of glutaric anhydride, 29.2 parts of 1,4-butanediol, 46 parts of diethylene glycol, trimethylolpropane 33.5 parts, 13.8 parts of dihydroxypropionic acid, 225 parts of diphenylmethane diisocyanate, 16.8 parts of 1,6-hexamethylene diisocyanate.

[0048] Preparation:

[0049] (1) Weigh each raw material according to the...

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Abstract

The invention discloses a water-soluble low-temperature curing polyurethane insulating varnish and its preparation method and application in electrical equipment. The raw materials of the polyurethane insulating varnish include polyurethane resin, a neutralizing agent and a curing agent. The raw materials of the polyurethane resin include polycarbonate containing double bonds. Polyester diols, triols, water-soluble functional monomers and diisocyanates, polyester diols containing double bonds are produced by the reaction of dibasic anhydrides and dibasic alcohols, dibasic anhydrides are made of maleic anhydride and glutaric anhydride Composition, the molar ratio of maleic anhydride to glutaric anhydride is 1‑1.5:1; preparation method: first prepare polyester diol containing double bonds, and then make polyurethane resin, neutralize with neutralizer and add to solidify and the application of the polyurethane insulating varnish of the present invention in electrical equipment; the polyurethane insulating varnish of the present invention is suitable for electrical equipment and has both water solubility and low-temperature curing, and can be cured rapidly at about 105°C, and After curing, it also has excellent insulation and bonding properties.

Description

technical field [0001] The invention belongs to the technical field of insulating varnish, and in particular relates to a water-soluble low-temperature curing polyurethane insulating varnish, a preparation method thereof and an application in electrical equipment. Background technique [0002] Insulating varnish is an important insulating material, and the performance of insulating varnish determines the stability of electrical equipment. Insulating varnish requires high cross-linking density after curing and forming, from a liquid linear polymer to a bulk polymer. Therefore, during the curing process of insulating varnish, it is often necessary to heat up so that the reactive functional groups can quickly undergo a cross-linking reaction , to provide the cross-linking points required for insulating varnishes. Among them, reducing the curing temperature of insulating varnish is of great significance for reducing energy consumption and saving production costs; at the same ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D5/25C08G18/66C08G18/42C08G18/34
CPCC09D175/14C08G18/348C09D5/00C08G18/68C08G18/3206C08G63/676C08G18/724C08G18/73C08G18/7671
Inventor 张笑瑞井丰喜吴斌刘立柱张春琪沈超张超
Owner SUZHOU TAIHU ELECTRIC ADVANCED MATERIAL CO LTD
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