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A kind of preparation method of water-based tung oil/acrylic resin insulating paint

A technology of acrylic resin and insulating varnish, applied in the direction of polyurea/polyurethane coating, coating, etc., to achieve the effects of high electrical insulation strength, improved gloss, and simple production process

Inactive Publication Date: 2016-01-06
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide a preparation method of water-based tung oil / acrylic resin insulating varnish. The technical problem to be solved is to improve the electrical insulation and film-forming performance of the insulating varnish and have good environmental protection and no pollution.

Method used

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  • A kind of preparation method of water-based tung oil/acrylic resin insulating paint

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Add 50.32g tung oil and 15.13g maleic anhydride into the reactor, under nitrogen protection, condense and reflux at 140°C for 1.5h, after the reaction, cool down to 80°C to obtain polyester liquid;

[0030] 2. Add 5g of isopropanol and 5g of ethylene glycol methyl ether to the polyester liquid prepared in step 1, then slowly add dropwise the acrylic resin composed of 6.32g of acrylic acid, 14.73g of hydroxypropyl acrylate and 8.48g of methyl methacrylate Mixed monomer and initiator azobisisobutyronitrile 0.2953g mixed solution, nitrogen protection during the reaction process, the dropping time is controlled at 30min, after the dropping is completed, the reaction is maintained at 80°C for 2 hours, and after the reaction is completed, it is cooled to room temperature to obtain poly Ester resin liquid;

[0031] 3. Add 10g of isopropanol and 10g of ethylene glycol methyl ether to the polyester resin solution prepared in step 2, then add N,N-dimethylethanolamine and N,N-d...

Embodiment 2

[0035] 1. Add 50.32g tung oil and 15.13g maleic anhydride into the reactor, under nitrogen protection, condense and reflux at 140°C for 1.5h, after the reaction, cool down to 80°C to obtain polyester liquid;

[0036] 2. Add 5g of isopropanol and 5g of ethylene glycol methyl ether to the polyester liquid, and slowly add dropwise the acrylic resin mixed monomer composed of 6.32g of acrylic acid, 14.73g of hydroxypropyl acrylate and 8.48g of methyl methacrylate Mixed solution with 0.2953g of initiator azobisisobutyronitrile, nitrogen protection during the reaction process, the dropping time is controlled at 30min, after the dropping is completed, the reaction is maintained at 80°C for 2 hours, and after the reaction is completed, it is cooled to room temperature to obtain a polyester resin solution ;

[0037] 3. Add 10g of isopropanol and 10g of ethylene glycol methyl ether to the polyester resin liquid, then add N,N-dimethylethanolamine and N,N-dimethylformamide to adjust the pH...

Embodiment 3

[0041] 1. Add 50.32g tung oil and 15.13g maleic anhydride into the reactor, under nitrogen protection, condense and reflux at 140°C for 1.5h, after the reaction, cool down to 80°C to obtain polyester liquid;

[0042] 2. Add 5g of isopropanol and 5g of ethylene glycol methyl ether to the polyester liquid, and slowly add dropwise the acrylic resin mixed monomer composed of 10.32g of acrylic acid, 10.73g of hydroxypropyl acrylate and 8.48g of methyl methacrylate Mixed solution with 0.2953g of initiator azobisisobutyronitrile, nitrogen protection during the reaction process, the dropping time is controlled at 30min, after the dropping is completed, the reaction is maintained at 80°C for 2 hours, and after the reaction is completed, it is cooled to room temperature to obtain a polyester resin solution ;

[0043]3. Add 10g of isopropanol and 10g of ethylene glycol methyl ether to the polyester resin liquid, then add N,N-dimethylethanolamine and N,N-dimethylformamide to adjust the pH...

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Abstract

The invention discloses a preparation method of an aqueous tung oil / acrylic resin insulating paint. The preparation method comprises the following steps: first, reacting100 parts of tung oil with 30 parts of maleic anhydride under nitrogen protection for 1-1.5 hours at 130-150 DEG C to obtain polyester liquid; then, adding an organic solvent into the polyester liquid, heating to 80 DEG C under nitrogen protection, dropwise adding an acrylic resin mixed monomer and an initiator, and then continuously reacting for 2 hours at 80 DEG C; then, adding an organic solvent into the polyester resin liquid, and adjusting the pH to 8.0-8.5 by organic amine to obtain acrylic acid modified tung oil resin liquid; and finally, adding TDI (Toluene Diisocynate) sealed with a sealing agent into the acrylic acid modified tung oil resin liquid, and stirring for 30 minutes at room temperature to obtain the aqueous tung oil / acrylic resin insulating paint with the solid content of 75-80wt%. The aqueous tung oil / acrylic resin insulating paint prepared by the method disclosed by the invention has high electrical insulation strength and excellent comprehensive performance.

Description

1. Technical field [0001] The invention relates to a preparation method of insulating varnish, in particular to a preparation method of water-based tung oil / acrylic resin insulating varnish. 2. Background technology [0002] Traditional insulating varnishes are generally solvent-based insulating varnishes, most of which contain a large amount of toxic solvents and thinners such as toluene, xylene, solvent naphtha, and styrene. These volatile organic compounds will be released during use, causing serious damage to the environment and human health. big damage. At present, as people's requirements for environmental protection are getting higher and higher, the environment-friendly insulating varnish that uses water as a solvent has a very broad application prospect. [0003] Tung oil has the advantages of good drying, strong adhesion, strong water resistance, good electrical insulation, etc., and has been used in electrical insulation coatings. my country is the main producer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/25C08G18/80C08G18/62C08F222/16C08F220/14C08F220/06C08F220/28C08F8/44
Inventor 王华林葛庆曹孟业
Owner HEFEI UNIV OF TECH