Aqueous tung oil-based insulating paint and preparation method thereof

A technology of insulating varnish and tung oil, applied in the direction of fatty acid production, fatty acid esterification, coating, etc., to achieve good film-forming properties, good comprehensive performance, and high electrical insulation strength

Inactive Publication Date: 2015-02-18
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country is the main producer of tung oil in the world, but there are few reports on the preparation of water-based insulating varnish using tung oil as raw material

Method used

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  • Aqueous tung oil-based insulating paint and preparation method thereof

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Effect test

Embodiment 1

[0032] 1. Add 60g of tung oil and 18g of maleic anhydride into the reactor, under nitrogen protection, condense and reflux at 140°C for 1.5h, and cool down to 110°C after the reaction to obtain addition-modified tung oil;

[0033] 2. Add 10g of isopropanol and 10g of propylene glycol methyl ether to the resin solution prepared in step 1, and then add 48g of polyethylene glycol (PEG-1000) under the protection of nitrogen, and react at this temperature for 2h to obtain esterification modification Sexual tung oil;

[0034] 3. Stir and dissolve 21g of epoxy resin (E-51) with 10g of n-butanol and 15g of ethylene glycol butyl ether at 60°C for 30 minutes, cool down the resin solution prepared in step 2 to 90°C, and then dissolve the dissolved ring Oxygen resin was slowly added dropwise to the above resin liquid, and catalyst triethylamine 0.21g was added, reacted at 90°C for 2.5h, cooled to room temperature after the reaction, and epoxy-modified tung oil was obtained;

[0035] 4. A...

Embodiment 2

[0039] 1. Add 60g of tung oil and 18g of maleic anhydride into the reactor, under nitrogen protection, condense and reflux at 140°C for 1.5h, and cool down to 110°C after the reaction to obtain addition-modified tung oil;

[0040] 2. Add 10g of isopropanol and 10g of propylene glycol methyl ether to the resin solution prepared in step 1, and then add 48g of polyethylene glycol (PEG-1000) under the protection of nitrogen, and react at this temperature for 2h to obtain esterification modification Sexual tung oil;

[0041] 3. Stir and dissolve 21g of epoxy resin (E-51) with 10g of n-butanol and 15g of ethylene glycol butyl ether at 60°C for 30 minutes, cool down the resin solution prepared in step 2 to 90°C, and then dissolve the dissolved ring Oxygen resin was slowly added dropwise to the above resin liquid, and catalyst triethylamine 0.21g was added, reacted at 90°C for 2.5h, cooled to room temperature after the reaction, and epoxy-modified tung oil was obtained;

[0042] 4. A...

Embodiment 3

[0046] 1. Add 60g of tung oil and 18g of maleic anhydride into the reactor, under nitrogen protection, condense and reflux at 140°C for 1.5h, and cool down to 110°C after the reaction to obtain addition-modified tung oil;

[0047] 2. Add 10g of isopropanol and 10g of propylene glycol methyl ether to the resin solution prepared in step 1, and then add 48g of polyethylene glycol (PEG-1000) under the protection of nitrogen, and react at this temperature for 2h to obtain esterification modification Sexual tung oil;

[0048] 3. Stir and dissolve 21g of epoxy resin (E-51) with 10g of n-butanol and 15g of ethylene glycol butyl ether at 60°C for 30 minutes, cool down the resin solution prepared in step 2 to 90°C, and then dissolve the dissolved resin Slowly add dropwise to the above resin liquid, and add catalyst triethylamine 0.21g, react at 90°C for 2.5h, cool to room temperature after the reaction, and obtain epoxy-modified tung oil;

[0049] 4. Add 15g of isopropanol and 15g of p...

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Abstract

The invention discloses aqueous tung oil-based insulating paint which is prepared from aqueous tung oil/epoxy resin, a curing agent, a sealing agent and an organic solvent, wherein the aqueous tung oil/epoxy resin is prepared by performing diene addition reaction on tung oil with maleic anhydride (maleic anhydride) and performing esterification reaction with polyethylene glycol (PEG) in sequence, further performing ring-opening reaction with epoxy resin E-51, and by finally neutralizing till that the pH value is 8.0-8.5 by using organic alkali; the curing agent is a curing agent which is sealed by using the sealing agent; the solid content of the insulating paint is 70-75wt%. The aqueous tung oil-based insulating paint is diluted with water in a ratio of 1:1, is dipped on a copper piece, and is cured for 3-4 hours at 120-130 DEG C, so that a paint film is prepared. The insulating paint is high in insulation strength and good in comprehensive property.

Description

1. Technical field [0001] The invention relates to an insulating varnish and a preparation method thereof, in particular to a water-based tung oil-based insulating varnish and a preparation method thereof. 2. Background technology [0002] In recent years, regulations on VOC content limits in industrial coatings have encouraged research and development of new coatings with low or zero VOC content. 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. As people's requirements for environmental protection are getting higher and higher, the environment-friendly insulating varnish that uses water as a solvent has broad application prospects. [0003] Tung oil has the advantages of good drying, st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C09D5/25C11C3/00C11C3/04
CPCC09D175/04C11C3/00C11C3/04
Inventor 王华林曹孟业葛庆翟林峰
Owner HEFEI UNIV OF TECH
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