Polyesteramide imide wire enamel and preparation method thereof

A technology of polyester amide imide and enameled wire varnish, applied in the field of polyester amide imide enameled wire varnish and its preparation, can solve the problems of poor surface state of enameled wire, influence on performance, inability of enameled wire varnish to achieve good leveling and the like, Achieving the effect of wide process margin, good coatability and improved heat resistance

Inactive Publication Date: 2016-10-05
DANYANG STAR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the copper wire or aluminum wire passes through the paint tank very quickly during high-speed winding, and the general enameled wire paint cannot achieve good leveling properties. The surface condition of the coated enameled wire is not good, and the performance will be greatly affected.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Purify the reaction device with pure nitrogen, add 0.5 parts of 4,4'-diphenylmethane diisocyanate, heat to 50°C and melt it completely, add 0.5 parts of trimellitic anhydride with stirring, and heat to 70-80°C for 6 hours. Add 1 part of cresol, raise the temperature to 130°C, and keep it warm for 3 hours. Then add 2 parts of ethylene glycol, 0.6 parts of glycerin and 1 part of terephthalic acid under stirring, raise the temperature to 220 ° C at a rate of about 10 ° C per hour, keep it warm for 2 hours, and vacuumize to the theoretical liquid output. Add some cresol solvent to lower the temperature to 180°C and keep it warm for 3 hours.

[0021] Take the resin prepared above, add some cresol and xylene, stir and dilute to the required solid content.

[0022] Use the polyester wire enamel prepared according to the above procedure to coat the enameled wire.

Embodiment 2

[0024] Purify the reaction device with pure nitrogen, add 1 part of 4,4'-diphenylmethane diisocyanate, heat to 50°C and melt it completely, stir and add 1 part of trimellitic anhydride, heat to 70-80°C for 6 hours. Add 1 part of cresol, raise the temperature to 130°C, and keep it warm for 3 hours. Then add 3 parts of ethylene glycol, 1.2 parts of glycerin and 2 parts of terephthalic acid under stirring, raise the temperature to 220 °C at a rate of about 10 °C per hour, keep it warm for 2 hours, and vacuumize to the theoretical liquid output. Add some cresol solvent to lower the temperature to 180°C and keep it warm for 3 hours.

[0025] Take the resin prepared above, add some cresol and xylene, stir and dilute to the required solid content.

[0026] Use the polyester wire enamel prepared according to the above procedure to coat the enameled wire.

Embodiment 3

[0028] Purify the reaction device with pure nitrogen, add 1 part of 4,4'-diphenylmethane diisocyanate, heat to 50°C and melt it completely, stir and add 1 part of trimellitic anhydride, heat to 70-80°C for 6 hours. Add 1 part of cresol, raise the temperature to 130°C, and keep it warm for 3 hours. Then add 2 parts of ethylene glycol, 0.6 parts of glycerin and 1 part of terephthalic acid under stirring, raise the temperature to 220 ° C at a rate of about 10 ° C per hour, keep it warm for 2 hours, and vacuumize to the theoretical liquid output. Add some cresol solvent to lower the temperature to 180°C and keep it warm for 3 hours.

[0029] Take the resin prepared above, add some cresol and xylene, stir and dilute to the required solid content.

[0030] Use the polyester wire enamel prepared according to the above procedure to coat the enameled wire.

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PUM

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Abstract

The invention relates to polyesteramide imde wire enamel and a preparation method thereof. The wire enamel is prepared from the following components in the following proportions: 4,4'-diphenyl-methane-diisocyanate and trimellitic anhydride in a molar ratio of 1:1, trimellitic anhydride and terephthalic acid in a molar ratio of (1:1)-(1:4), the terephthalic acid and ethylene glycol in a molar ratio of (1:1)-(1:2), and the terephthalic acid and glycerol in a molar ratio of (1:0.5)-(1:0.6). According to the preparation method, amide imide is modified based on polyester wire enamel, and amide and imide groups are introduced, so that the levelling property and coating property during high-speed wire coating can be improved, and the surface, performance and production efficiency of the wire enamel can be greatly improved.

Description

technical field [0001] The invention relates to a polyester wire enamel and a preparation method thereof, and relates to a polyester amidoimide wire enamel and a preparation method thereof. Background technique [0002] With the advancement and upgrading of technology, high-speed automatic winding machines are widely used in the coil winding process of electrical appliances. The speed of high-speed winding equipment is generally 1500-3000rpm, and the maximum speed can reach 6000rpm. However, during high-speed winding, the copper wire or aluminum wire passes through the paint tank very quickly, and the general enameled wire paint cannot achieve good leveling. The surface condition of the coated enameled wire is not good, and the performance will be greatly affected. This application uses polyester wire enamel as the basis to modify amidoimide, and introduces amide and imine groups, thereby improving the leveling of polyester wire enamel during high-speed coating, thereby grea...

Claims

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Application Information

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IPC IPC(8): C09D175/06C08G18/76C08G18/42C08G63/20
Inventor 张斌张国生张衡伟
Owner DANYANG STAR CHEM
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