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High adhesion and solvent resistant insulating paint for polyester imide enameled wire and preparation method thereof

An enameled wire insulation and polyesterimide technology, which is applied in the field of insulating varnish preparation, can solve the problem that polyesterimide cannot meet the strict requirements of refrigerant resistance, poor adhesion between paint film and conductor, and poor surface scratch resistance, etc. problems, to achieve the effect of stable process production, wide process margin and good paint film adhesion

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

[0005] 2. The adhesion between the paint film and the conductor is not good. According to EC60851, the peeling and twisting K value of polyesterimide enameled wire is 110, while the K value of modified polyester is 155.
[0006] 3. The surface scratch resistance is not as good as that of polyamide imide paint
[0007] Four, the conventional polyesterimide anti-refrigerant can not meet the stringent requirements
We found that despite the above improvements, the ultimate goal of zero defects is still difficult to achieve

Method used

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  • High adhesion and solvent resistant insulating paint for polyester imide enameled wire and preparation method thereof
  • High adhesion and solvent resistant insulating paint for polyester imide enameled wire and preparation method thereof
  • High adhesion and solvent resistant insulating paint for polyester imide enameled wire and preparation method thereof

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Embodiment 1～3

[0062] Embodiments 1-3 High adhesion, the formula of solvent-resistant polyesterimide enameled wire insulating varnish

[0063] High adhesion, solvent-resistant polyesterimide enameled wire insulating varnish, in parts by weight, its formula is, see Table 1:

[0064] Polyesterimide resin:

[0065]

[0066] Solvent:

[0067] 10-20 parts of cresol;

[0068] 10-15 parts of phenol;

[0069] 10-15 parts of aromatic solvent oil;

[0070] Hardener:

[0071] 1-3 parts of phenolic resin;

[0072] Butyl orthotitanate 0.5-2 parts;

[0073] Leveling agent:

[0074] Acrylate 0.5-1 part.

[0075] Table 1 Recipe

[0076]

[0077] A preparation method of high adhesion and solvent-resistant polyesterimide enameled wire insulating varnish, calculated in parts by weight, comprising the following steps:

[0078] (1) Feeding: Put DMT, ethylene glycol, propylene glycol, half of THEIC, and zinc acetate into the reaction kettle according to the formula.

[0079] (2) Heating: control ...

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Abstract

The invention discloses a high adhesion and solvent resistant insulating paint for polyester imide enameled wire. The formula of the insulating paint is as below: 40-50 parts of polyesterimide resin, 45-50 parts of a solvent, 1-5 parts of a curing agent and 0.5-1 part of a leveling agent. The enameled wire paint prepared by the invention has good adhesion of paint film, good chemical solvent resistance and good scratch resistance; and compounding with the polyamide imide paint, the enameled wire paint has unidirectional scrape resistance reaching more than 2000g, and peel twisted K value reaching above 170.

Description

technical field [0001] The invention relates to a preparation method of insulating varnish, in particular to a high-adhesion, solvent-resistant polyesterimide enameled wire insulating varnish and a preparation method thereof. Background technique [0002] Polyesterimide wire-covered insulating varnish is modified by introducing imine groups or Sekke at the same time on the basis of polyester varnish, in order to improve its heat resistance. Due to its excellent heat resistance, polyesterimide enameled wire has been widely used in sealed motors, electric tools, and other high heat-resistant motors and electrical appliances. [0003] Although polyesterimide enameled wire can meet the requirements of most customers in terms of electrical properties, thermal properties, and chemical properties, it has the following disadvantages, namely: [0004] 1. Due to the large number of molecular chain segments in the rigid structure in the molecular structure of the paint film, the flexi...

Claims

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Application Information

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IPC IPC(8): C09D179/08C09D5/25C08G73/16
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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