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A kind of polyesterimide wire enamel and preparation method thereof

A technology of wire enamel and polyesterimide, which is applied in the field of wire enamel, can solve the problems that polyesterimide wire enamel does not have refrigerant resistance, and achieve good refrigerant resistance, high imine content, and cost saving Effect

Inactive Publication Date: 2011-12-14
南通远景电工器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyesterimide wire enamel produced by these two methods does not have good resistance to refrigerants (refrigerant resistance)

Method used

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  • A kind of polyesterimide wire enamel and preparation method thereof
  • A kind of polyesterimide wire enamel and preparation method thereof
  • A kind of polyesterimide wire enamel and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment

[0032] Add xylenol and trimellitic anhydride into a 1000ml three-neck flask, heat, raise the temperature to 155°C and keep it warm for half an hour to dissolve the trimellitic anhydride. (At the same time the aromatic diamine is divided into six equal parts). Add the first aromatic diamine, keep it at 155°C, and keep it warm for half an hour. The reactant changes from transparent to yellow and turbid; then add the second amount of aromatic diamine, keep it at 155°C, and keep it warm for half an hour; Parts of aromatic diamine until all six parts of aromatic diamine are added. After all the aromatic diamines have been added, the temperature is raised to 178° C., and the temperature is kept for 2 hours. The water generated by imidization is continuously discharged. Imination is complete.

[0033] Then, add dihydric alcohol, trihydric alcohol and dibasic acid, and raise the temperature to 180°C until the reactant is transparent. After the reactant became transparent, it was k...

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Abstract

The invention discloses a polyesterimide wire enamel and a preparation method thereof. It is prepared with additives, and its component distribution ratio is calculated by molar ratio: dibasic acid: dibasic acid + tribasic anhydride is 0.3-0.5:1; tribasic alcohol: dibasic acid + tribasic anhydride is 0.3-0.5:1 ;Dihydric alcohol: dibasic acid + tribasic acid anhydride: 0.6~1.0:1; Tribasic anhydride: aromatic diamine: 2:1; Phenolic solvent: tribasic anhydride + aromatic diamine: 1~1.5:1 ; phenolic solvent: aromatic hydrocarbon solvent is 1.5 ~ 4: 1; the amount of crosslinking agent is calculated based on the metal active ingredients contained in itself and the weight of solid components in polyesterimide wire enamel, and the amount is 0.3% ~ 1.3%; additives The dosage is calculated based on the weight of its own solid components and the weight of solid components in the polyesterimide wire enamel, and the dosage is 1% to 4%; the present invention can save costs, has high imine content, heat resistance, solvent resistance, and Refrigerant is good.

Description

technical field [0001] The invention relates to a wire enamel technology, in particular to a polyesterimide wire enamel with refrigerant resistance and a preparation method thereof. Background technique [0002] With the improvement of people's living standards and the needs of industrial development, large-scale refrigeration equipment such as refrigerators and freezers is developing rapidly. The compression motors used in these equipments have put forward performance requirements for insulating materials such as resistance to refrigerants, oils, and hydrolysis. Therefore, production A large number of cryogen-resistant enameled wires are required to meet this technical demand. [0003] At present, there are two main coatings for enameled wires used in the production of refrigerants: [0004] One is selected from polyimide or its composite coating with other polymers; the other is selected from polyamideimide or its composite coating with other polymers. [0005] From the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D5/25H01B3/30
Inventor 刘文钦陈积波
Owner 南通远景电工器材有限公司