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

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...

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

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