A kind of flexible polyesterimide enameled wire insulation varnish and preparation method thereof

An enameled wire insulation and polyester imide technology, which is applied in the field of insulating paint and its preparation, can solve the problems of high defect rate between turns of the motor, difficult to zero defects, etc., and achieves wide process allowance, good paint film adhesion, and scratch resistance. good effect

Active Publication Date: 2016-08-31
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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  • A kind of flexible polyesterimide enameled wire insulation varnish and preparation method thereof
  • A kind of flexible polyesterimide enameled wire insulation varnish and preparation method thereof
  • A kind of flexible polyesterimide enameled wire insulation varnish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0061] Embodiment 1-3 The formula of flexible polyesterimide enameled wire insulation varnish

[0062] A flexible polyesterimide enameled wire insulating varnish is characterized in that, in parts by weight, its formula is:

[0063]

[0064] Solvent (cresol: phenol: aromatic hydrocarbon solvent naphtha=50:25:25) 45~50 parts. The specific formula is shown in Table 1.

[0065] Table 1 Recipe

[0066]

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

[0067] Among them, the composition of polyesterimide is:

[0068]

[0069]

[0070] Among them, phenolic resin 1:

[0071]

[0072] A preparation method of a flexible polyesterimide enameled wire ins...

Embodiment 4

[0091] Embodiment 4 Enameled wire sample wire and detection of flexible polyesterimide enameled wire insulating varnish

[0092] Preparation of enameled wire sample wire:

[0093] Coating equipment: Meida QHLF1 / 2;

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Abstract

The invention discloses a flexible polyesterimide enameled wire insulating varnish. According to parts by weight, the formula is as follows: 40-50 parts of polyesterimide; 2-3 parts of phenolic resin (cresol type phenolic resin); 2-3 parts of phenolic resin 2 (p-tert-butylphenol type phenolic resin) 1~2 parts; silicone oil 0.01~0.02 parts; amino resin 0.5~2 parts; aromatic polyamide 1~3 parts; 50 servings. The enameled wire produced by the invention has good flexibility of the paint film, and after the enameled wire is extended by 25%, the paint film will not crack after being wound with 1 times the diameter of the conductor; the salt water pinhole property is good, and the enameled wire has no pinhole after the enameled wire is extended by 5%; the heat level can reach 200 levels.

Description

technical field [0001] The invention relates to an insulating varnish and a preparation method thereof, in particular to a flexible polyesterimide enameled wire insulating varnish and a preparation method thereof. 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 addin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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