Varnish for epoxy casting transformer and preparation process thereof

A preparation process and transformer technology, applied in the field of varnish, can solve problems such as inconvenient direct use and inconvenient construction

Inactive Publication Date: 2017-12-01
肇庆高新区恒泰信息服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the existing technology can reduce the surface tension to a certain extent, increase the wetting performance, and the obtained varnish has good resolubility and water resistance, but the fluorocarbon surfactant is basically a paste or powder, which is inconvenient to use directly. It often separates into two phases or precipitates. It needs to be stirred before use, and if necessary, it needs to be slightly heated, which brings inconvenience to the construction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] An epoxy casting varnish for transformers, made of the following raw materials in parts by weight: 15 parts of methyl methacrylate, 10 parts of shellac, 15 parts of polyamide resin, 20 parts of phenyl o-hydroxybenzoate, 5 parts of propylene glycol butyl ether 1 part, lecithin 1 part, fluorocarbon resin 10 parts, hydroxymethyl cellulose 1 part, defoamer 1 part, zinc oxide powder 5 parts.

[0022] A kind of preparation technology of varnish for epoxy cast transformer, comprises following several steps:

[0023] (1) Weigh zinc oxide powder, add liquid lecithin, put it into a constant temperature water bath at 80°C and stir for 30 minutes, then keep it warm at 60°C for 1 hour, dry it, and crush it through a 400-mesh sieve to obtain modified zinc oxide powder ,spare;

[0024] (2) Immerse methyl methacrylate and phenyl o-hydroxybenzoate in a sodium hydroxide solution with a mass concentration of 3g / l at 60°C for 30 minutes, then take it out, wash it with deionized water, and...

Embodiment 2

[0028] An epoxy casting varnish for transformers, made of the following raw materials in parts by weight: 20 parts of methyl methacrylate, 15 parts of shellac, 20 parts of polyamide resin, 25 parts of phenyl o-hydroxybenzoate, 10 parts of propylene glycol butyl ether 5 parts, lecithin 5 parts, fluorocarbon resin 15 parts, hydroxymethyl cellulose 3 parts, defoamer 5 parts, zinc oxide powder 8 parts.

[0029] A kind of preparation technology of varnish for epoxy cast transformer, comprises following several steps:

[0030] (1) Weigh zinc oxide powder, add liquid lecithin, put it in a constant temperature water bath at 100°C and stir for 60 minutes, then keep it warm at 60°C for 1 hour, dry it, and crush it through a 500-mesh sieve to obtain modified zinc oxide powder ,spare;

[0031] (2) Immerse methyl methacrylate and phenyl o-hydroxybenzoate into a sodium hydroxide solution with a mass concentration of 6g / l at 60°C for degreasing treatment for 30 minutes, then take it out and...

Embodiment 3

[0035] An epoxy casting varnish for transformers, made of the following raw materials in parts by weight: 16 parts of methyl methacrylate, 11 parts of shellac, 16 parts of polyamide resin, 21 parts of phenyl o-hydroxybenzoate, 6 parts of propylene glycol butyl ether 2 parts, lecithin 2 parts, fluorocarbon resin 11 parts, hydroxymethyl cellulose 2 parts, defoamer 2 parts, zinc oxide powder 6 parts.

[0036] A kind of preparation technology of varnish for epoxy cast transformer, comprises following several steps:

[0037] (1) Weigh zinc oxide powder, add liquid lecithin, put it into a constant temperature water bath at 90°C and stir for 40 minutes, then keep it warm at 60°C for 1 hour, dry it, and crush it through a 450-mesh sieve to obtain modified zinc oxide powder ,spare;

[0038] (2) Immerse methyl methacrylate and phenyl o-hydroxybenzoate into a sodium hydroxide solution with a mass concentration of 4g / l at 60°C for degreasing treatment for 30min, then take it out and wash...

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PUM

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Abstract

The invention relates to varnish for an epoxy casting transformer. The varnish is prepared by the following materials in parts by weight: 15-20 parts of methacrylate, 20-25 parts of shellac, 25-30 parts of polyamide resin, 15-25 parts of o-hydroxy phenyl benzoate, 15-20 parts of propanediol butyl ether, 5-10 parts of lecithin, 10-15 parts of fluorocarbon resin, 1-3 parts of hydroxymethyl cellulose, 1-5 parts of polyoxypropylene glycerol ether and 5-8 parts of zinc oxide powder. The varnish provided by the invention is corrosion-resistant, illumination-resistant, cold-resistant and heat-resistant, has more stable properties than common coatings on the market, and has promotion value.

Description

technical field [0001] The invention relates to the field of varnishes, in particular to a varnish for epoxy casting transformers. Background technique [0002] Varnish is a coating composed of resin as the main film-forming substance plus a solvent. Since both the coating and the coating film are transparent, it is also called transparent coating. Apply on the surface of the object, and form a smooth film after drying, showing the original texture of the object surface. As competition in the varnish industry continues to intensify, mergers and acquisitions among large varnish companies and capital operations are becoming more frequent, domestic excellent varnish manufacturers are paying more and more attention to the research of the industry market, especially the in-depth understanding of the company's development environment and customer demand trends. Research. Modern varnishes are gradually becoming a class of versatile engineering materials and an important industry ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D4/06C09D5/08C09D7/12
CPCC09D4/06C09D5/08C08F283/04C08F289/00C08F259/08
Inventor 黄丹
Owner 肇庆高新区恒泰信息服务有限公司
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