Method for preparing tung oil-modified water-based insulating paint

A technology of insulating paint and tung oil, applied in polyester coatings, coatings and other directions, can solve problems such as high cost, human health hazards, environmental pollution, etc., and achieve the effects of increasing added value, low cost, and convenient construction

Active Publication Date: 2010-06-09
合肥英索莱特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional insulating varnishes are generally solvent-free or solvent-based varnishes, which are costly. During use, most of them use a large amount of toluene, xylene, styrene, solvent naphtha, etc. as solvents and thinners. These volatile organic compounds (VOC) often have Toxic, flammable and explosive, directly discharged into the atmosphere during construction and drying, not only causing environmental pollution, but also causing great harm to human health

Method used

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  • Method for preparing tung oil-modified water-based insulating paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 45g trimethylolpropane, 13g glycerol, 18g adipic acid, 9g maleic anhydride, 3g Polyethylene Glycol-400 in the four-necked flask that stirrer, condenser and oil-water separator are housed, Protected by nitrogen, react at 200°C for 2h. Add 35g of phthalic anhydride and 22g of tung oil, and the reaction time at 200°C is about 4 hours. When the acid value reaches 55-65mgKOH / g, stop the reaction. Add 10g isopropanol, 10g propylene glycol methyl ether for dilution, add appropriate amount of N,N-dimethylethanolamine, N,N-dimethylethanolamine (N,N-dimethylethanolamine:N,N-diethylethanolamine= 1:1) to neutralize to pH=7.0-8.0 to obtain tung oil modified polyester resin liquid.

[0026] Mix tung oil-modified polyester resin liquid with etherified amino resin at a mass ratio of 85:15, add appropriate amount of dicumyl peroxide and di-tert-butyl peroxide, and prepare tung oil-modified water-based insulating varnish after 1 hour. Add water and stir so that the solid content of...

Embodiment 2

[0028] Add 45g trimethylolpropane, 13g glycerol, 25g azelaic acid, 9g maleic anhydride, 3g polyethylene glycol-400 in the four-necked flask that stirrer, condenser and oil-water separator are equipped with, Protected by nitrogen, react at 200°C for 2h. Add 35g of phthalic anhydride and 22g of tung oil, and the reaction time at 200°C is about 4 hours. When the acid value reaches 55-65mgKOH / g, stop the reaction. Add 10g isopropanol, 10g propylene glycol methyl ether for dilution, add appropriate amount of N,N-dimethylethanolamine, N,N-diethylethanolamine (N,N-dimethylethanolamine:N,N-diethylethanolamine= 1:1) to neutralize to pH=7.0-8.0 to obtain tung oil modified polyester resin liquid.

[0029] Mix tung oil modified polyester resin liquid with etherified amino resin at a mass ratio of 80:20, add appropriate amount of dicumyl peroxide and di-tert-butyl peroxide, and physically mix at room temperature for 0.5-1.0 hours to prepare tung oil modified Water-based insulating paint....

Embodiment 3

[0031] Add 45g trimethylolpropane, 13g glycerol, 15g malonic acid, 9g maleic anhydride, 3g polyethylene glycol-400 in the four-necked flask that stirrer, condenser and oil-water separator are housed, Protected by nitrogen, react at 200°C for 2h. Add 35g of phthalic anhydride and 22g of tung oil, and the reaction time at 200°C is about 4 hours. When the acid value reaches 55-65mgKOH / g, stop the reaction. Add 10g isopropanol, 10g propylene glycol methyl ether for dilution, add appropriate amount of N,N-dimethylethanolamine, N,N-diethylethanolamine (N,N-dimethylethanolamine:N,N-diethylethanolamine= 1:1) to neutralize to pH=7.0-8.0 to obtain tung oil modified polyester resin liquid.

[0032] Mix tung oil-modified polyester resin liquid with etherified amino resin at a mass ratio of 75:25, add dicumyl peroxide and di-tert-butyl peroxide, and physically mix at room temperature for 0.5-1.0 hours to prepare tung oil-modified For water-based insulating paint, add water and stir, so t...

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Abstract

The invention discloses a method for preparing a tung oil-modified water-based insulating paint. The method comprises the following steps that: firstly, 100 parts of polyalcohol reacts with 20 to 40 parts of poly-acid and 10 to 20 parts of maleic anhydride at the temperature of between 160 and 200 DEG C for 1 to 2 hours under the protection of the nitrogen gas to give an esterified liquid; secondly, 25 to 35 parts of the tung oil and 50 to 60 parts of maleic anhydride are added into the esterified liquid to react 2 to 6 hours at the temperature of between 190 and 210 DEG C under the protection of the nitrogen gas to form the esterified liquid, 15 to 25 percent of organic solvent by weight is added into the obtained esterified liquid and the mixture is neutralized by organic amine until the pH value is between 7.0 and 8.5 to form a polyester resin liquid modified by the tung oil; and finally, 10 to 30 weight percent of etherified amino resin and 0.1 to 0.3 weight percent of peroxide are added into the tung oil-modified polyester resin liquid and the obtained product is stirred and blended the for half an hour to 1 hour at room temperature to form the tung oil-modified water-based insulating paint. When the insulating paint is used, water is added in the insulating paint, the mixture is stirred and diluted to form a product with a solid content of 30 to 40 weight percent and the pH value of between 7 and 8, and the product is coated on a conductor to be solidified into a paint film at the temperature of between 120 and 130 DEG C.

Description

1. Technical field [0001] The invention relates to a processing method of insulating varnish, in particular to a processing method of water-based insulating varnish, in particular to a preparation method of tung oil modified water-based insulating varnish. 2. Background technology [0002] Traditional insulating varnishes are generally solvent-free or solvent-based varnishes, which are costly. During use, most of them use a large amount of toluene, xylene, styrene, solvent naphtha, etc. as solvents and thinners. These volatile organic compounds (VOC) often have Toxic, flammable and explosive, during the construction and drying process, it is directly discharged into the atmosphere, which not only causes environmental pollution, but also causes great harm to human health. With the increasingly stringent environmental protection laws and regulations in various countries, the insulating varnish materials used in domestic and foreign motor products are subject to increasingly st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/08C09D5/25
Inventor 王华林王继植王啟明贺楠男
Owner 合肥英索莱特新材料科技有限公司
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