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Low-temperature-resistant insulating impregnating resin and preparation method thereof

A technology of insulating impregnation and low temperature resistance, which is applied in the field of low temperature resistant insulating impregnating resin and its preparation, which can solve problems such as defects in the insulation system, affecting the motor, and affecting the operation of the motor, and achieve excellent high and low temperature (liquid nitrogen-room temperature) impact performance , Good electrical properties, low curing temperature

Active Publication Date: 2014-04-23
SUZHOU JUFENG ELECTRICAL INSULATION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The motor insulation system, as the heart of the motor, its quality directly affects the operation of the motor, and if the insulating impregnated resin in the low-temperature insulation does not have the ability to resist high and low temperature cracking, it will cause defects in the insulation system and affect the operation of the motor
[0004] At present, the market lacks low-temperature resistant insulating impregnated resins with good electrical properties, good manufacturability, and liquid nitrogen-room temperature impact resistance, which are urgently needed by the domestic LNG compression / transportation industry

Method used

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  • Low-temperature-resistant insulating impregnating resin and preparation method thereof
  • Low-temperature-resistant insulating impregnating resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This example provides a low temperature resistant insulating impregnation resin, which is prepared through the following steps:

[0037] (1) Preparation of polyurethane epoxy resin: Treat the raw materials to a water content below 0.1%, then add 30g of poly(tetramethylene-co-ethylene ether) glycol with a number average molecular weight of 2000, 10g of hexamethylene Isocyanate, heated to 80°C, reacted under nitrogen protection for 2 hours. Then 2g of 1,4-butanediol was added, and the reaction was continued for 3 hours at 80°C under the protection of nitrogen to obtain a polyurethane prepolymer. Add 100g hydantoin epoxy resin into the polyurethane prepolymer, heat to 60°C, and react under nitrogen protection for 2 hours to obtain polyurethane epoxy resin.

[0038] (2) Preparation of low temperature resistant insulating impregnating resin: weigh 100g of E-51 epoxy resin, 40g of polyurethane epoxy resin prepared in step A, 30g of phenolic hydroxyl-terminated low molecular ...

Embodiment 2

[0040] This example provides a low temperature resistant insulating impregnation resin, which is prepared through the following steps:

[0041] (1) Preparation of polyurethane epoxy resin: Treat the raw materials to a water content below 0.1%, then add 15g of poly(tetramethylene-co-ethylene ether) glycol with a number average molecular weight of 1200, 8g of hexamethylene Isocyanate, heated to 70°C, reacted under nitrogen protection for 3 hours. Then 1 g of 1,4-butanediol was added, and the reaction was continued for 3 hours at 80° C. under the protection of nitrogen to obtain a polyurethane prepolymer. Add 100g hydantoin epoxy resin to the polyurethane prepolymer, heat to 70°C, and react for 1 hour under the protection of nitrogen to obtain polyurethane epoxy resin.

[0042] (2) Preparation of low temperature resistant insulating impregnation resin: weigh 150g of F-51 epoxy resin, 90g of polyurethane epoxy resin, 60g of low molecular weight polyphenylene ether with terminal p...

Embodiment 3

[0044] This example provides a low temperature resistant insulating impregnation resin, which is prepared through the following steps:

[0045](1) Preparation of polyurethane epoxy resin: Treat the raw materials to a water content below 0.1%, then add 20 g of poly(tetramethylene-co-ethylene ether) glycol with a number average molecular weight of 1500, 5 g of hexamethylene Isocyanate, heated to 60°C, reacted under nitrogen protection for 4 hours. Then 3g of 1,4-butanediol was added, and the reaction was continued for 1 hour under the protection of nitrogen at 90°C to obtain a polyurethane prepolymer. Add 100g hydantoin epoxy resin to the polyurethane prepolymer, heat to 60°C, and react for 2 hours under the protection of nitrogen to obtain polyurethane epoxy resin.

[0046] (2) Preparation of low temperature resistant insulating impregnation resin: weigh 100g of E-54 epoxy resin, 80g of polyurethane epoxy resin, 40g of low molecular weight polyphenylene ether with terminal phe...

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Abstract

The invention relates to low-temperature-resistant insulating impregnating resin and a preparation method thereof. The impregnating resin is prepared from the following raw materials in parts by weight: 100 parts of epoxy resin, 40-90 parts of polyurethane epoxy resin, 20-50 parts of phenolic hydroxyl terminated low-molecular-weight polyphenylether resin, 100-200 parts of low-viscosity polyether epoxy resin and 10-30 parts of epoxy curing agent. The preparation method of the impregnating resin comprises the steps of weighing epoxy resin, polyurethane epoxy resin and phenolic hydroxyl terminated low-molecular-weight polyphenylether resin proportionally, heating to the temperature of 70-100 DEG C, adding the epoxy curing agent while stirring, reacting for 30-60 minutes, then, adding the other raw materials, and thoroughly stirring uniformly, thereby obtaining the impregnating resin. The impregnating resin disclosed by the invention has excellent high / low-temperature impact resistance (liquid nitrogen-room temperature), excellent electrical properties and good mechanical strength, is low in curing temperature and good in storage stability, and is applicable to the insulating treatment of stators of LNG (Liquefied Natural Gas) compression / transportation motors, superconducting motors and the like.

Description

technical field [0001] The invention belongs to the field of electrical insulating materials, and in particular relates to a low-temperature resistant insulating impregnated resin and a preparation method thereof. Background technique [0002] Due to the high crosslinking density of pure epoxy resin cured products, even at room temperature, there are disadvantages such as brittleness, low toughness, and poor impact resistance. When the temperature drops to a low temperature, the internal stress and frozen chain segments in the matrix due to heat shrinkage make the epoxy resin more brittle, which affects the application of the epoxy resin at low temperature. Therefore, it is necessary to toughen and modify the epoxy resin to improve the cracking resistance and high and low temperature impact resistance of the system. [0003] As a clean and efficient energy source, liquefied natural gas (LNG) has become the focus of development and utilization to alleviate the contradiction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L75/04C08L75/08C08L71/12C08G18/66C08G18/58C08G18/12
Inventor 徐伟红何少波夏宇袁世臻王文舒氧
Owner SUZHOU JUFENG ELECTRICAL INSULATION SYST
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