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A low-viscosity high-temperature-resistant vacuum pressure solvent-free impregnation resin and its preparation method

A technology of vacuum pressure and resin impregnation, applied in the field of electrical insulating resin, can solve the problems of high price, gel, affecting production efficiency, etc., and achieve the effect of high heat resistance index

Active Publication Date: 2018-09-11
DANYANG WODLE ELECTRIC MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a lack of suitable high-temperature-resistant solvent-free impregnating resin in China. When introducing foreign advanced traction motor manufacturing technology, in order to meet the technical standards of the motor, it is necessary to purchase foreign high-temperature-resistant solvent-free impregnating resin. The price is extremely high and the procurement cycle is long. Moreover, this solvent-free impregnated resin has a certain storage period. After a long storage time, it will gel by itself and be scrapped. Therefore, it is not possible to purchase more each time, which will affect production efficiency.

Method used

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  • A low-viscosity high-temperature-resistant vacuum pressure solvent-free impregnation resin and its preparation method
  • A low-viscosity high-temperature-resistant vacuum pressure solvent-free impregnation resin and its preparation method
  • A low-viscosity high-temperature-resistant vacuum pressure solvent-free impregnation resin and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A low-viscosity high temperature resistant vacuum pressure solvent-free impregnating resin, its components and weight percentages are as follows: distillation grade epoxy resin is 30% of bisphenol A type epoxy resin, 40% of polyimide resin, and the reactive diluent is ethylene 15% of base toluene, 4% of hydroquinone as polymerization inhibitor, 10% of tung oil anhydride as curing agent and 1% of aluminum acetylacetonate as curing accelerator.

Embodiment 2

[0026] A low-viscosity, high-temperature, vacuum-pressure-resistant, solvent-free impregnating resin, its components and percentages by weight are as follows: Distilled-grade epoxy resin is 27% of novolac epoxy resin, 37% of polyimide resin, 18% of vinyl toluene, polymerization inhibitor The agent is hydroquinone 5%, the curing agent is tung oil anhydride 11%, and the curing accelerator is aluminum acetylacetonate 2%.

Embodiment 3

[0028] A low-viscosity, high-temperature, vacuum-pressure-resistant, solvent-free impregnating resin. Its components and percentages by weight are as follows: distilled-grade epoxy resin is 25% of bisphenol A epoxy resin, 40% of polyimide resin, and reactive diluent is poly Dipropylene phthalate 20%, polymerization inhibitor is hydroquinone 3%, curing agent is methyl hexahydrophthalic anhydride 10% and curing accelerator is aluminum acetylacetonate and tri-(dimethylaminomethyl ) phenol mixture 2%.

[0029] Table 1 is the performance test data of the solvent-free impregnating resin of Examples 1-3

[0030]

[0031] Table 2 is a solvent-free impregnating resin resin viscosity change table with temperature:

[0032]

[0033] Below 23°C, 4# cannot be measured accurately, and the data is for reference only.

[0034] Table 3 is the variation table of solvent-free impregnation resin rotational viscosity with temperature:

[0035]

[0036] The above-mentioned preparation m...

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Abstract

The invention relates to a low-viscosity high-temperature-resistant vacuum-pressure solvent-free impregnating resin and a preparation method thereof. The resin comprises the following components, by weight percentage, 25-30% of a distillation-grade epoxy resin, 35-40% of a polyimide resin, 15-20% of a reactive diluent, 2-8% of a polymerization inhibitor, 10-12% of a curing agent and 1-2% of a curing accelerator. The resin is prepared through mixing and stirring, and the method is convenient and fast. The resin is less in volatile matter content, low in viscosity, low in curing shrinkage rate, high in heating elongation percentage, improved in service life of a motor, and high in heat-resistant index.

Description

technical field [0001] The invention relates to the field of electrical insulating resins, and specifically discloses a low-viscosity, high-temperature-resistant, vacuum-pressure, solvent-free impregnating resin and a preparation method thereof. Background technique [0002] The insulation structure of the motor winding is to wrap several layers of one or several insulating materials on the formed coil made of winding wire, and then embed it in the iron core of the motor, and connect the coils according to the specified connection method to form the winding of the motor. At this time, there are a large number of air gaps in the winding insulation and between the winding and the iron core. Due to the existence of air gaps, the electrical insulation performance, mechanical strength, heat resistance and thermal conductivity of the insulation, and environmental factors (such as water, dust, moisture, etc.) These air gaps must be fully filled with high-performance solvent-free im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08L63/00C08G59/42
CPCC08G59/4207C08G59/4223C08L79/08C08L2201/08C08L63/00
Inventor 袁建黄治国余艳屏殷丽肖方敏赵明中
Owner DANYANG WODLE ELECTRIC MATERIALS CO LTD
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