CN103694847A - Wire enamel for copper-clad aluminum for transformer and preparation method thereof - Google Patents

Abstract

The invention discloses wire enamel for copper-clad aluminum for a transformer and a preparation method thereof. The wire enamel is characterized by being prepared from the following raw materials in parts by weight: 15-20 parts of E-44 epoxy resin, 2-3 parts of aminopropyl triethoxy silane, 10-12 parts of dimethyl terephthalate, 14-17 parts of neopentyl glycol, 10-12 parts of trimellitic anhydride, 10-15 parts of magnesium carbonate, 6-9 parts of diaminodiphenylmethane, 4-5 parts of triethanol isocyanuric acid ester, 1-2 parts of polyacrylamide, 1-2 parts of butyltin mercaptide, 4-7 parts of kieselguhr, 20-25 parts of nylon 12, 7-9 parts of additive, 100-110 parts of xylene, and 140-150 parts of cresol. The wire enamel for copper-clad aluminum for the transformer has the beneficial effects that in the production of copper-clad aluminum magnet wires, the property of the oil paint is improved, the problem of pinhole control is solved, the adherence is improved, the long-time problem that the withstand voltage and hot stamping of the copper-clad aluminum magnet wire do not reach the standard is solved, the pressure resistance is good, and the pinhole is well controlled.

Description

A kind of transformer wire enamel of copper cover aluminum and preparation method thereof

 

Technical field

The present invention relates to a kind of wire enamel, especially a kind of wire enamel of using copper cover aluminum for transformer and preparation method thereof.

Background technology

Enameled wire is a kind of electrical material, and it is at the high-strength insulating layer of a circular copper line surface processing thin layer, plays the effect with external insulation.By specification, can be processed into than hair thin lousiness line also, as thick cotton covered wire as thumb.Enameled wire has good insulation effect and waterproof ability.Aspect electrical equipment application very extensive, as electric motor, generator, water pump, electro-magnet, welding machine, household electrical appliance, cableless communication, loud speaker, tg, transformer etc.Wire enamel is the necessary insulating material of producing enameled wire, wire enamel requires to have good tack, physical strength, insulating property, resistance toheat, wear resisting property, salt spray resistance and adverse environment resistant performance etc., but there is thermotolerance, wear no resistance in common wire enamel, insufficient strength, heat-resisting level be lower than the problems such as 120 ℃, is difficult to meet the requirement of varying environment.Need to improve the formula of wire enamel and production technique, further improve the performance of enamel-cover paint, reduce its production cost.

Summary of the invention

Object of the present invention is just to provide a kind of transformer wire enamel of copper cover aluminum and preparation method thereof, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this:

The wire enamel of copper cover aluminum for a kind of transformer, it is characterized in that, by following weight part (kilogram) raw material make: E-44 epoxy resin 15-20, aminopropyl triethoxysilane 2-3, dimethyl terephthalate (DMT) 10-12, neopentyl glycol 14-17, trimellitic acid 1,2-anhydride 10-12, magnesiumcarbonate 10-15, diaminodiphenylmethane 6-9, trihydroxyethyl isocyanuric ester 4-5, polyacrylamide 1-2, butanethiol tin 1-2, diatomite 4-7, nylon 12 20-25, auxiliary agent 7-9, dimethylbenzene 100-110, M-and P-cresols 140-150;

Described auxiliary agent is made by following raw materials in part by weight: nano mica powder 0.2-0.3, trolamine 1.2-1.3, sec.-propyl three (dioctylphyrophosphoric acid acyloxy) titanic acid ester 2-3, hexamethylenetetramine 1-2, polyester acrylate 3-5, Viscoat 295 12-15, triethyl citrate 3-6, linking agent TAC1-2, Tenox PG 2-3, coix seed oil 1-2; Its preparation method is that polyester acrylate, Viscoat 295, triethyl citrate are mixed, be heated to 60-70 ℃, add linking agent TAC, Tenox PG, coix seed oil, stirring reaction 30-40 minute, add again other remaining component, continue stirring reaction 1-2 hour, obtain.

The preparation method of the wire enamel of copper cover aluminum for described transformer, is characterized in that comprising the following steps:

(1), take in dimethylbenzene, the reactor of M-and P-cresols input with agitator and be uniformly mixed, be heated to 45-50 ℃, add nylon 12, stir and be heated to 140-180 ℃, after dissolving completely to nylon 12, add again polyacrylamide, neopentyl glycol, trimellitic acid 1,2-anhydride, magnesiumcarbonate, insulation 4-5 hour;

(2), step (1) reaction mass is cooled to 80-90 ℃, add aminopropyl triethoxysilane, dimethyl terephthalate (DMT), auxiliary agent, trihydroxyethyl isocyanuric ester, keep temperature, stirring reaction 2-3 hour;

(3) add leftover materials, again, be warming up to 100-120 ℃, continue stirring reaction 2-3 hour;

(4), cooling material is to 50-60 ℃, is ground to 20-40 μ m slurry, filter and get final product.

Transformer of the present invention has following beneficial effect with the wire enamel of copper cover aluminum: the performance of painting in copper cover aluminum insulated wire production process improves, solved pin hole control problem, improved adherence, solved that copper cover aluminum insulated wire is withstand voltage not up to standard all the time, the difficult problem that hot stamping is not up to standard, resistance to pressure is good, and pin hole is controlled well.

Embodiment

Described transformer with the wire enamel of copper cover aluminum be by following weight part (kilogram) raw material make: E-44 epoxy resin 15, aminopropyl triethoxysilane 2, dimethyl terephthalate (DMT) 10, neopentyl glycol 14, trimellitic acid 1,2-anhydride 10, magnesiumcarbonate 10, diaminodiphenylmethane 6, trihydroxyethyl isocyanuric ester 4, polyacrylamide 1, butanethiol tin 1, diatomite 4, nylon 12 20, auxiliary agent 7, dimethylbenzene 100, M-and P-cresols 140;

Described auxiliary agent by following weight part (kilogram) raw material makes: nano mica powder 0.2, trolamine 1.2, sec.-propyl three (dioctylphyrophosphoric acid acyloxy) titanic acid ester 2, hexamethylenetetramine 1, polyester acrylate 5, Viscoat 295 12, triethyl citrate 3, linking agent TAC2, Tenox PG 2, coix seed oil 2; Its preparation method is that polyester acrylate, Viscoat 295, triethyl citrate are mixed, be heated to 60-70 ℃, add linking agent TAC, Tenox PG, coix seed oil, stirring reaction 30-40 minute, add again other remaining component, continue stirring reaction 1-2 hour, obtain;

Preparation method comprises the following steps:

(1), take in dimethylbenzene, the reactor of M-and P-cresols input with agitator and be uniformly mixed, be heated to 45-50 ℃, add nylon 12, stir and be heated to 140-180 ℃, after dissolving completely to nylon 12, add again polyacrylamide, neopentyl glycol, trimellitic acid 1,2-anhydride, magnesiumcarbonate, insulation 4-5 hour;

(2), step (1) reaction mass is cooled to 80-90 ℃, add aminopropyl triethoxysilane, dimethyl terephthalate (DMT), auxiliary agent, trihydroxyethyl isocyanuric ester, keep temperature, stirring reaction 2-3 hour;

(3) add leftover materials, again, be warming up to 100-120 ℃, continue stirring reaction 2-3 hour;

(4), cooling material is to 50-60 ℃, is ground to 20-40 μ m slurry, filter and get final product.

Use paint of the present invention wire rod main performance index processed as follows:

1, tack is good;

2, temperature classification >=155 ℃, thermal shocking reaches 180 ℃ of paint films and does not ftracture;

3, cohesive strength 15N/mm ²;

4, transformer oil resistant is 1200 hours/105 ℃, and paint film is without damage.

Claims (3)

1. the wire enamel of copper cover aluminum for a transformer, it is characterized in that, by following weight part (kilogram) raw material make: E-44 epoxy resin 15-20, aminopropyl triethoxysilane 2-3, dimethyl terephthalate (DMT) 10-12, neopentyl glycol 14-17, trimellitic acid 1,2-anhydride 10-12, magnesiumcarbonate 10-15, diaminodiphenylmethane 6-9, trihydroxyethyl isocyanuric ester 4-5, polyacrylamide 1-2, butanethiol tin 1-2, diatomite 4-7, nylon 12 20-25, auxiliary agent 7-9, dimethylbenzene 100-110, M-and P-cresols 140-150.

2. auxiliary agent according to claim 1 is made by following raw materials in part by weight: nano mica powder 0.2-0.3, trolamine 1.2-1.3, sec.-propyl three (dioctylphyrophosphoric acid acyloxy) titanic acid ester 2-3, hexamethylenetetramine 1-2, polyester acrylate 3-5, Viscoat 295 12-15, triethyl citrate 3-6, linking agent TAC1-2, Tenox PG 2-3, coix seed oil 1-2; Its preparation method is that polyester acrylate, Viscoat 295, triethyl citrate are mixed, be heated to 60-70 ℃, add linking agent TAC, Tenox PG, coix seed oil, stirring reaction 30-40 minute, add again other remaining component, continue stirring reaction 1-2 hour, obtain.

3. the preparation method of the wire enamel of copper cover aluminum for transformer according to claim 1, is characterized in that comprising the following steps:

(1), take in dimethylbenzene, the reactor of M-and P-cresols input with agitator and be uniformly mixed, be heated to 45-50 ℃, add nylon 12, stir and be heated to 140-180 ℃, after dissolving completely to nylon 12, add again polyacrylamide, neopentyl glycol, trimellitic acid 1,2-anhydride, magnesiumcarbonate, insulation 4-5 hour;

(2), step (1) reaction mass is cooled to 80-90 ℃, add aminopropyl triethoxysilane, dimethyl terephthalate (DMT), auxiliary agent, trihydroxyethyl isocyanuric ester, keep temperature, stirring reaction 2-3 hour;

(3) add leftover materials, again, be warming up to 100-120 ℃, continue stirring reaction 2-3 hour;

(4), cooling material is to 50-60 ℃, is ground to 20-40 μ m slurry, filter and get final product.