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Method for manufacturing polyesterimide enamelled wire paint

An enameled wire varnish and manufacturing method technology, applied in the direction of coating, etc., can solve the problems of low adhesion, small DV value, poor flexibility of polyesterimide enameled wire, etc., achieve delicate reaction, improve adhesion, and process margin of coating wire big effect

Inactive Publication Date: 2008-05-14
CHINESE ELECTRICAL EQUIP GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention provides a method for manufacturing polyesterimide wire enamel, which can overcome the disadvantages of poor flexibility, low adhesion and small DV value of the polyesterimide enameled wire produced by the existing method, and achieve the improvement of polyesterimide resin. The technical effect of flexibility and adhesive force, according to the inventive method can produce high DV value polyesterimide wire enamels

Method used

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  • Method for manufacturing polyesterimide enamelled wire paint
  • Method for manufacturing polyesterimide enamelled wire paint
  • Method for manufacturing polyesterimide enamelled wire paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Put 400g of dimethyl terephthalate (DMT), 200g of ethylene glycol, 430g of Sek, 270g of D33 monomer, 250g of xylenol and 2g of butyl orthotitanate into the reactor, and put 410g of trimellitic anhydride and 4 , 207g of 4'-diaminodiphenyl ether, reacted at 150°C for 1 hour and then raised the temperature to 170°C, put in the second batch of trimellitic anhydride 410g and 207g of 4,4'-diaminodiphenyl ether, continued the reaction for 2 hours, and then added the second Three batches of 410g of trimellitic anhydride and 207g of 4,4'-diaminodiphenyl ether were kept at 170°C for one hour, then raised to 200°C-205°C at 10 / °C, kept warm until transparent, and carried out central control testing. The ICI viscosity reached 200 Centipoise~500 centipoise / 200℃. After passing the test, add cresol, keep stirring at 155°C for 4 hours, then add cresol, xylene and C9 high-boiling aromatic hydrocarbon solvent, and finally add an appropriate amount of polybutyl titanate, phenolic resin and ...

Embodiment 2

[0043] Put 400g of dimethyl terephthalate, 200g of ethylene glycol, 260g of sek, 87g of trimethylolpropane, 270g of D33 monomer, 250g of xylenol and 2g of butyl orthotitanate into the reaction kettle, and put it into the reactor at 80°C 410g of trimellitic anhydride and 204g of 4,4'-diaminodiphenylmethane were reacted at 150°C for 1 hour, then the temperature was raised to 170°C, and the second batch of trimellitic anhydride 410g and 204g of 4,4'-diaminodiphenylmethane were added to continue the reaction for 2 hours , and then add the third batch of 410g of trimellitic anhydride and 204g of 4,4'-diaminodiphenylmethane, and keep it at 170°C for one hour, then raise the temperature at 10 / °C to 200°C-205°C and keep it transparent until it is transparent, and then carry out the ICI viscosity detection in the central control 200 centipoise to 500 centipoise / 200°C, add cresol after passing the test, keep stirring at 160°C for 4 hours, then add cresol, xylene and C9 high-boiling aroma...

Embodiment 3

[0045] Put 400g of dimethyl terephthalate, 200g of ethylene glycol, 260g of sek, 50g of trimethylolpropane, 250g of D33 monomer, 200g of xylenol and 2g of butyl orthotitanate into the reaction kettle, and put it into the reactor at 80°C 410g of trimellitic anhydride and 204g of 4,4'-diaminodiphenylmethane were heated up to 170°C after reacting at 150°C for 1 hour, and the second batch of trimellitic anhydride 410g and 204g of 4,4'-diaminodiphenyl ether were added to continue the reaction for 2 hours, and then Add the third batch of 410g of trimellitic anhydride and 204g of 4,4'-diaminodiphenylmethane, heat it at 170°C for one hour, then heat it at 10 / °C to 200°C-205°C until it is transparent, and carry out the central control to detect that the ICI viscosity reaches 200 centimeters Poise ~ 500 centipoise / 200 ° C, add cresol after passing the test, add cresol, xylene and high boiling point aromatic hydrocarbon solvent S100 after stirring at 170 ° C for 5 hours, and finally add...

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Abstract

The invention discloses a method for manufacturing polyesterimide wire enamel, which comprises the steps of preparing polyesterimide resin and letdown treatment. During the preparation of polyesterimide resin, bisphenol A diisopropanol ether is used to replace part of Ethylene glycol (EG) is used as a reactant, and the imidization reaction is carried out by feeding in steps. The method of the invention can overcome the disadvantages of poor flexibility, low adhesion and small DV value of the polyesterimide enameled wire produced by the prior method. The polyesterimide wire enamelled varnish manufactured by the method of the invention has a large line coating process margin and a fast line coating speed. The method of the invention can be used to manufacture novel 180 grade high DV value polyesterimide wire enamels.

Description

technical field [0001] The invention relates to a method for manufacturing wire enamel, in particular to a method for manufacturing polyesterimide wire enamel. Background technique [0002] Enameled wire enamel is an important class of electrical insulation coatings, which are mainly coated on the outer layer of various types of different wires passing through bare copper wires. Generally, it is made by repeatedly coating enamelled wire varnish on the conductor with an enamelling machine and baking at high temperature. The effect of the enameled wire varnish is to create a good insulating layer between the wires in the winding and the wires to prevent the flow of current. This layer of insulating layer can maintain its original performance under the effects of long-term moisture, heat, chemical impregnation and various mechanical forces such as friction, bending, stretching, compression, impact, etc. Therefore, the basic requirements of enameled wire except In addition to ...

Claims

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Application Information

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IPC IPC(8): C09D179/04
Inventor 常小东胡兆楠
Owner CHINESE ELECTRICAL EQUIP GRP CO LTD
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