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Preparation method of flexible polyester imide enameled wire insulating paint

A technology of enameled wire insulation and polyesterimide, which is applied in the field of preparation of flexible polyesterimide enameled wire insulating varnish, can solve the problems of difficult zero defects, high defect rate between turns of motors, etc., and achieve wide process margin and paint film adhesion Good, scratch-resistant effect

Active Publication Date: 2014-11-05
艾仕得绝缘材料(安徽)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the conventional polyesterimide enameled wire is used for this type of product, the defect rate between the turns of the motor is very high
We found that despite the above improvements, the ultimate goal of zero defects is still difficult to achieve

Method used

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  • Preparation method of flexible polyester imide enameled wire insulating paint
  • Preparation method of flexible polyester imide enameled wire insulating paint
  • Preparation method of flexible polyester imide enameled wire insulating paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0060] Embodiments 1-3 Formula of flexible polyesterimide enameled wire insulating varnish

[0061] A flexible polyesterimide enameled wire insulating varnish is characterized in that, in parts by weight, its formula is:

[0062]

[0063] Solvent (cresol: phenol: aromatic hydrocarbon solvent naphtha=50:25:25) 45~50 parts. The specific formula is shown in Table 1.

[0064] Table 1 Recipe

[0065]

Example 1

Example 2

Example 3

Polyesterimide resin

40

45

50

Phenolic resin 1

2

2.5

3

Phenolic resin 2

2

1.5

1

silicone oil

0.01

0.01

0.02

amino resin

0.5

1

2

Aramid

3

2

1

Butyl orthotitanate

1

0.5

0.5

solvent

48

45

50

[0066] Wherein, the composition of polyesterimide is:

[0067]

[0068]

[0069] Among them, phenolic resin 1:

[0070]

[0071] A preparation method of a flexible polyesteri...

Embodiment 4

[0090] Example 4 Enameled wire sample wire and detection of flexible polyesterimide enameled wire insulating varnish

[0091] Preparation of enameled wire sample wire:

[0092] Coating equipment: Meida QHLF1 / 2;

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Abstract

The invention discloses a flexible polyester imide enameled wire insulating paint. The formula of the paint is as below: 40-50 parts of polyester imide, 2-3 parts of phenolic resin 1 (cresol phenolic resin), 1-2 parts of phenolic resin 2 (tert butyl phenol phenolic resin), 0.01-0.02 parts of silicone oil, 0.5-2 parts of amino resin, 1-3 parts of aromatic polyamide, 0.5-1 parts of tetrabutyl titanate, and 45-50 parts of a solvent. The enameled wire prepared by the invention has the advantages: the enameled wire paint film good flexibility, and the paint film does not crack after extending by 25% and winding by 1 time diameter of conductor; the enameled wire has good brine pinhole property without pinhole after extension by 5%; and the enameled wire has thermal level reaching 200.

Description

technical field [0001] The invention relates to a preparation method of insulating varnish, in particular to a preparation method of flexible polyesterimide enameled wire insulating varnish. Background technique [0002] Commonly used polyester wire enamel is made of dimethyl terephthalate, and ethylene glycol, glycerol for transesterification and polycondensation reactions to generate medium molecular weight polyester resin (molecular weight between 2000 and 5000), dissolve It is compounded by adding butyl ortho titanate and phenolic resin to the phenolic solvent. When the solvent evaporates at high temperature, the excess hydroxyl group on the glycerol will undergo a cross-linking reaction to form a cross-linked body-shaped network structure. However, the thermal grade of polyester enameled wire is 130, which cannot be used in high temperature resistant occasions. Polyesterimide-covered wire insulating varnish is based on polyester varnish by adding 4,4'-diaminodiphenylm...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D161/08C09D161/32C09D177/10C09D5/25C09D7/12C08G73/16C08G8/12
Inventor 邵武军涂张应
Owner 艾仕得绝缘材料(安徽)有限公司
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