Polyester-imide wire coating enamel and preparation method thereof

A technology of enameled wire paint and polyesterimide, applied in the field of enameled wire paint, can solve the problem that polyesterimide enameled wire paint does not have refrigerant resistance and other problems, and achieves good refrigerant resistance, cost saving and high imine content. Effect

Inactive Publication Date: 2009-12-30
南通远景电工器材有限公司
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  • Abstract
  • Description
  • Claims
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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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  • Polyester-imide wire coating enamel and preparation method thereof

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Embodiment

[0040] 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.

[0041] 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 polyester-imide wire coating enamel and a preparation method thereof. The polyester-imide wire coating enamel is prepared from binary acid, triacid anhydride, aromatic diamine, dihydric alcohol, trihydric alcohol, phenol solvents, aromatic hydrocarbon solvents, a cross-linking agent and an additive, wherein the molar ratio of the binary acid to the binary acid+ the triacid anhydride is 0.3-0.5: 1; the molar ratio of the trihydric alcohol to the dihydric alcohol+ the triacid anhydride is 0.3-0.5: 1; the molar ratio of the dihydric alcohol to the binary acid+ the triacid anhydride is 0.6-1.0:1; the molar ratio of the triacid anhydride to the aromatic diamine is 2:1; the molar ratio of the phenol solvents to the triacid anhydride+ the aromatic diamine is 1-1.5: 1; and the molar ratio of the phenol solvents to the aromatic hydrocarbon solvents is 1.5-4: 1; the consumption of the cross-linking agent is calculated by the weight of effective metal components contained in the cross-linking agent and solid components in the polyester-imide wire coating enamel, and is between 0.3 and 1.3 percent; and the consumption of the additive is calculated by the weight of solid components contained in the additive and the weight of the solid components in the polyester-imide wire coating enamel, and is between 1 and 4 percent. The polyester-imide wire coating enamel can save the cost, and has high imine content as well as good heat resistance, solvent resistance and refrigerant resistance.

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 Applications(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
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