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Preparation method of high-heat-resistance and high-wear-resistance polyesterimide enameled wire insulating paint

A technology of enameled wire insulation and polyesterimide, applied in the direction of coating, etc., can solve the problems of poor adhesion between paint film and conductor, influence of heat resistance of enameled wire, poor surface scratch resistance, etc., and achieve stable process production and process The effect of wide margin and good paint film adhesion

Active Publication Date: 2014-08-13
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] Second, the adhesion between the paint film and the conductor is not good. According to IEC 60851, the stripping and twisting K value of polyesterimide enameled wire is 110, while the K value of modified polyester is 155.
[0006] Three, the surface scratch resistance is not as good as polyamideimide paint
[0009] Large-sized round wires or flat wires have higher requirements on the adhesion and flexibility of the paint film. In order to produce enameled wires above 180 grades, enameled wire manufacturers generally use polyester paint or acetal paint as a primer to increase the paint film adhesion. , and then coated with polyesterimide paint, which has a certain impact on the heat resistance of the enameled wire, and the process is relatively more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 100 parts of polyesterimide wire enamel with medium molecular weight, add 5 parts of thermoplastic phenolic resin and stir for 90 minutes when the kettle temperature is 85°C, add 1.2 parts of highly methyl etherified melamine resin and stir for 60 minutes when the kettle temperature is 70°C, and stir for 60 minutes when the kettle temperature is 60 Add 0.7 parts of polymethylsiloxane at ℃ and stir for 45 minutes. When the temperature is lowered to 50℃, discharge and filter to make a polyesterimide paint with a solid content of 39% and a viscosity of 1000mpas as a primer, and a 338 / 35.

Embodiment 2

[0041] Take 100 parts of polyesterimide wire enamel with medium molecular weight, add 8 parts of thermoplastic phenolic resin and stir for 90 minutes when the kettle temperature is 85 ° C, add 0.5 parts of highly methyl etherified melamine resin and 0.5 parts of high n-butyl Etherified melamine resin was stirred for 60 minutes. When the kettle temperature was 60°C, 1 part of polymethylsiloxane was added and stirred for 45 minutes. When the temperature was lowered to 50°C, the material was discharged and filtered to make a polyester with a solid content of 39% and a viscosity of 1000mpas. Amine paint was used as primer and 338 / 35 was used as top coat.

Embodiment 3

[0043] Take 100 parts of polyesterimide wire enamel with medium molecular weight, add 10 parts of thermoplastic phenolic resin at 85°C and stir for 90 minutes, add 1.2 parts of highly n-butyl etherified melamine resin at 70°C and stir for 60 minutes, At 60°C, add 1 part of polyethylsiloxane and stir for 45 minutes, and when the temperature is lowered to 50°C, discharge and filter to make a polyesterimide paint with a solid content of 39% and a viscosity of 1000mpas as a primer, and a topcoat with 338 / 35.

[0044] Preparation of enameled wire sample wire:

[0045] Coating equipment: Meida QHLF1 / 2;

[0046] Process parameters:

[0047] Oven inlet: 230°C; Lower layer of oven: 350°C; Supplementary heating after catalysis: 520°C; Circulation fan: 2100RPM; Exhaust fan: 800RPM; Cooling fan: 400RPM;

[0048] Speed: 30 m / min

[0049] Painting passes: 9+3

[0050] The enameled wire specification is 1.05, the bottom layer is polyesterimide, and the surface layer is polyamideimide. ...

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Abstract

The invention relates to a preparation method of a high-heat-resistance and high-wear-resistance polyesterimide enameled wire insulating paint, which takes 100 parts of reacted polyesterimide enameled wire insulating paint by weight with medium molecular weight as a basal body. At least the following components in parts by weight are added: 1-20 parts of amino resin, 1-20 parts of thermoplastic phenolic resin and 0.5-5 parts of siloxane. Enameled wires which are made by using the paint has the advantages that the paint film adhesiveness is excellent, the stripping and twisting K value of the enameled wires can reach more than 155 and the K value is higher than the K value (which is 110) of the existing conventional products by more than two grades; the scratch resistance is excellent and the unidirectional scratch resistance can reach more than 2000g when the wire is combined with the polyesterimide paint; the heat resistance can reach 200 while the heat resistance of the conventional polyesterimide enameled wires is 180; and the process redundancy is wide and the realization of stable process production is facilitated.

Description

technical field [0001] The invention relates to a method for preparing an enameled wire, in particular to a method for preparing an insulating varnish for a heat-grade high wear-resistant polyesterimide enameled wire. 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] First, because there are many molecular segments of rigid structure in the molecular structure of the paint film, the flexibility of the insu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D161/32C09D161/08C09D183/04C09D5/25
Inventor 涂张应张俊
Owner 艾仕得绝缘材料(安徽)有限公司
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