Preparation process of wire enamel with high moisture resistance for dry-type electric transformer

A technology for power transformer and enameled wire enamel, applied in the field of enameled wire, can solve the problems of reducing the safety and reliability of electrical equipment such as transformers, reducing the mechanical and electrical properties of enameled wire, and poor hydrophobicity of enameled wire enamel, so as to improve safety and reliability. , the effect of improving mechanical and electrical properties and reducing water absorption

Active Publication Date: 2015-05-06
JIANGSU YAWEI TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wire enamel has good insulation and oil resistance, and has good adhesion to copper wires, but the wire enamel provided by the invention has poor hydrophobicity, which leads to a decrease in the mechanical and electrical properties of the enameled wire, thereby reducing the use of the wire enamel. Transformers, etc. Safety and reliability of electrical equipment

Method used

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  • Preparation process of wire enamel with high moisture resistance for dry-type electric transformer

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Experimental program
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Effect test

Embodiment 1

[0009] The preparation process of high moisture-proof wire enamelling for dry-type power transformer provided in this embodiment, the wire enamelling includes the following components in parts by weight: 100 parts of dimethyl terephthalate, 45 parts of m-phenylenediamine, trimellitic anhydride 51 parts, 18 parts of ethylene glycol, 25 parts of decabromodiphenylethane, 12 parts of mica powder, 36 parts of phenol, 73 parts of glycerin, 10 parts of crosslinking agent, 4 parts of leveling agent, and 16 parts of solvent. Among them, the crosslinking agent is m-xylylenediamine, and the leveling agent is a mixture of polymethylphenylsiloxane, trichlorethylene and ethylene glycol ether in a weight ratio of 1:1;

[0010] The preparation process comprises the following steps:

[0011] Step a: get the following components in parts by weight: 100 parts of dimethyl terephthalate, 45 parts of m-phenylenediamine, 51 parts of trimellitic anhydride, 18 parts of ethylene glycol, 36 parts of phe...

Embodiment 2

[0015] In this embodiment, the dry-type power transformer is provided with a high moisture-proof wire enamel preparation process. The wire enamel includes the following components in parts by weight: 105 parts of dimethyl terephthalate, 48 parts of m-phenylenediamine, trimellitic anhydride 53 parts, 19 parts of ethylene glycol, 28 parts of decabromodiphenylethane, 14 parts of mica powder, 38 parts of phenol, 76 parts of glycerin, 12 parts of crosslinking agent, 4.5 parts of leveling agent, and 18 parts of solvent. Among them, the crosslinking agent is a mixture of trimethylolpropane, m-xylylenediamine and tetra-n-butyl titanate in a weight ratio of 1.5:1:2.5, and the leveling agent is acrylic resin and polydimethylsiloxane Alkanes are mixed at a weight ratio of 1:1, and solvents such as styrene, trichloroethylene and ethylene glycol ether are mixed at a weight ratio of 1:2:1.

[0016] The preparation process comprises the following steps:

[0017] Step a: Take the following c...

Embodiment 3

[0021] In this embodiment, the dry-type power transformer is provided with a high moisture-proof wire enamel preparation process. The wire enamel includes the following components in parts by weight: 105 parts of dimethyl terephthalate, 48 parts of m-phenylenediamine, trimellitic anhydride 53 parts, 19 parts of ethylene glycol, 28 parts of decabromodiphenylethane, 14 parts of mica powder, 38 parts of phenol, 76 parts of glycerin, 12 parts of crosslinking agent, 4.5 parts of leveling agent, and 18 parts of solvent. Among them, the crosslinking agent is a mixture of trimethylolpropane, m-xylylenediamine and tetra-n-butyl titanate in a weight ratio of 1.5:1:2.5, and the leveling agent is acrylic resin and polydimethylsiloxane Alkanes are mixed at a weight ratio of 1:1, and solvents such as styrene, trichloroethylene and ethylene glycol ether are mixed at a weight ratio of 1:2:1.

[0022] The preparation process comprises the following steps:

[0023] Step a: Take the following c...

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Abstract

The invention provides a preparation process of a wire enamel with high moisture resistance for a dry-type electric transformer. The process comprises the following steps: a. taking the following components in parts by weight: 100-106 parts of dimethyl terephthalate, 45-50 parts of m-phenylenediamine, 51-54 parts of trimellitic anhydride, 18-20 parts of ethylene glycol, 36-40 parts of phenol and 73-78 parts of glycerinum, putting into a reactor, heating to 100-110 EG C, and stirring for 55 minutes to obtain a mixture A; b. putting the following components in parts by weight: 10-14 parts of a cross-linking agent, 25-30 parts of decabrominated dipheny ethane and 12-15 parts of mica powder to the mixture A, heating to 140-150 DEG C and stirring for 30 minutes to obtain a mixture B; and c. putting the following components in parts by weight: 4-5 parts of a flatting agent and 16-18 parts of a solvent into the mixture B, stirring for 30 minutes and cooling to obtain the wire enamel. According to the wire enamel prepared by the process, compared with a polyesterimide wire enamel in the prior art, the water absorption rate is significantly reduced; and the wire enamel has excellent hydrophobicity and moisture resistance.

Description

technical field [0001] The invention relates to the technical field of enameled wires, in particular to a preparation process of high moisture-proof enameled wire varnish for dry-type power transformers. Background technique [0002] With the rapid development of society, people rely more and more on various electrical appliances in their daily life, and put forward higher and higher requirements for the development of electrical appliances. Among them, the performance of insulating materials used in electrical appliances is improved. also received more attention. As one of the core components of insulating materials for electrical appliances, enameled wire enamel is a coating that can create a good insulating layer between wires in motor windings. It is mainly used for bare copper wires and alloy wires of various wire diameters. And the outer layer of glass fiber covered wire to improve and stabilize the performance of enameled wire. In various electrical appliances, ther...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C09D179/08C09D5/25C09D7/06C09D7/00C09D7/12C09D7/47
CPCC08K2201/014C08L2205/03C09D7/20C09D7/47C09D7/61C09D7/63C09D179/08H01B3/308C08L83/04C08K13/02C08K5/03C08K5/053C08K5/12C08K3/34C08K5/02C08K5/06C08L33/00C08K5/10
Inventor田正稳
OwnerJIANGSU YAWEI TRANSFORMER