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A kind of corona-resistant enameled wire varnish and preparation method thereof

An enameled wire paint and corona-resistant technology, applied in coatings, polyester coatings, etc., can solve problems affecting workers' health, air pollution, etc., and achieve the effect of easy surface organic grafting treatment, not easy to agglomerate, and less added amount

Active Publication Date: 2019-03-08
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the solvents of inverter-resistant enameled wire enamel contain cresol and other organic solvents with strong odor and strong toxicity, serious air pollution will be generated during operation, which will affect the health of workers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a corona-resistant wire enamel for variable frequency motors and a preparation method thereof. The preparation process is as follows:

[0032] (1) Mix 1000g N-methylpyrrolidone and 1000g xylene evenly, and slowly add 2400g nano fumed silica (average particle size 130nm, specific surface area 80m 2 / g), after the nano-powder is added, set the line speed of the toothed disc disperser to 18m / s, and shear and disperse for 1h. Then add the above-mentioned nano solution into the nano grinder, set the line speed to 23m / s, and circulate the grind for 5h so that D50<80nm, and prepare the inorganic oxide pre-dispersion liquid.

[0033] (2) Move the inorganic oxide pre-dispersion to the synthesis reaction device, add 120g of titanate coupling agent, adjust the pH to 8, set the temperature to 90°C, and react for 4 hours to obtain the organic grafted corona-resistant Modifier with a viscosity of 50mps at 25°C and a solid content of 53%.

[0034] (3) Add 5625...

Embodiment 2

[0037] (1) Mix 800g of N-methylpyrrolidone and 800g of xylene evenly, and slowly add 2200g of nano fumed aluminum oxide (average particle size 150nm, specific surface area 50m 2 / g), after the nano-powder is added, set the line speed of the toothed disc disperser to 20m / s, and shear and disperse for 0.5h. Then add the above-mentioned nano-solution into the nano-grinding machine, set the line speed to 23m / s, and circulate the grinding for 6h so that D50<80nm, and prepare the nano-predispersion liquid.

[0038] (2) Move the nano-predispersion liquid to the synthesis reaction device, add 115g of silane coupling agent, adjust the pH value to 9, set the temperature at 100°C, and react for 3 hours to obtain the organic grafted nano-dispersion liquid, at 25°C Viscosity: 45mps, solids content: 56%.

[0039] (3) Add 5094.4g of 200-grade heat-resistant polyester wire enamel with a solid content of 40% commercially available under the condition of stirring with a toothed disc disperser ...

Embodiment 3

[0042] (1) Mix 1000g N-methylpyrrolidone and 1000g xylene evenly, and slowly add 1100g nano fumed silica (average particle size 110nm, specific surface area 80m 2 / g) and 1000g nanometer fumed aluminum oxide (average particle size 135nm, specific surface area 60m 2 / g), after the nano-powder is added, set the line speed of the toothed disc disperser to 18m / s, and shear and disperse for 1.5h. Then add the above nano solution into the nano grinder, set the line speed to 22m / s, and grind for 3.5 hours in a circular manner, so that D50<70nm, and prepare the nano pre-dispersion.

[0043] (2) Move the nanometer pre-dispersion to the synthesis reaction device, add 86g of silane coupling agent and 40g of titanate coupling agent, adjust the pH value to 8, set the temperature at 110°C, and react for 4 hours to obtain organic grafts The nano-dispersion liquid has a viscosity of 42mps at 25°C and a solid content of 50.8%.

[0044] (3) Add 5958g of commercially available 42% solid conten...

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Abstract

The invention relates to corona-resistant enameled wire paint and a preparation method thereof. The preparation method comprises the following steps: under the condition that a tooth disc type dispersion machine is used for stirring, adding an inorganic oxide raw material into an organic solvent, and controlling the linear velocity of the tooth disc type dispersion machine to be 10-22m / s and the shearing dispersion time to be 0.5-2h; then performing grinding by adopting a grinding machine, and controlling the linear velocity of the grinding machine to be 15-25m / s and the grinding time to be 3-6h to prepare an inorganic oxide pre-dispersion solution with D50 of less than 150nm and solid content of 50-70%; adding a coupling agent into the inorganic oxide pre-dispersion solution to form a corona-resistant modifying agent; and stirring the corona-resistant modifying agent and a paint material body at 70-100 DEG C to prepare the corona-resistant enameled wire paint. The corona-resistant enameled wire paint prepared by the method provided by the invention is high in solid content, low in viscosity and good in corona resistance and long-term storage stability, can satisfy a normal temperature line coating process, is convenient to use and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency and energy-saving nano-insulation materials, and in particular relates to a corona-resistant wire enamel and a preparation method thereof. Background technique [0002] my country is a country with a shortage of resources, and the demand for electric energy is very strong, and more than 60% of the electric energy is consumed by the motor. Because the frequency conversion motor can save 30-40% of the electric energy, it has the advantages of high efficiency, convenient maintenance, and high degree of automation. Energy has played a huge role, and there is a tendency to gradually replace DC speed control motors. Frequency conversion speed control motors are growing at a rate of 13~16% every year. However, due to the pulse wave generated by the frequency converter, the frequency conversion motor has a towering peak and a steep rise time, coupled with a variable or extremely high frequency (up ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/00C09D7/61C09D5/25C09D7/20
Inventor 徐伟红戴雪伟王璐姜瀛州周成夏宇张继红李子琦
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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