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Ultrahigh-temperature polyimide heat-conducting insulating material and preparation method thereof

A heat-conducting insulating material and polyimide technology are applied in the field of ultra-ultra-high temperature polyimide heat-conducting insulating material and its preparation, which can solve the problems of low heat resistance level and aggravated thermal-oxidative aging failure of organic materials, and reduce thermal expansion. coefficient, excellent high temperature thermo-oxidative/thermal stability, the effect of eliminating negative effects

Pending Publication Date: 2022-01-14
辽宁鲸苇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commercialized epoxy resin glue and silicone resin glue are potting insulation materials widely used in conventional submersible motors and traction motors; however, the heat resistance of the two types of potting glues is low, and they can only be used at temperatures below 250°C. Conditions of use
Because above 250°C, the thermal oxygen aging failure of organic materials is intensified, most of the organic carbon skeleton molecular chains are pyrolyzed and gradually gasified; Report on sealing insulation materials

Method used

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  • Ultrahigh-temperature polyimide heat-conducting insulating material and preparation method thereof
  • Ultrahigh-temperature polyimide heat-conducting insulating material and preparation method thereof
  • Ultrahigh-temperature polyimide heat-conducting insulating material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] A method for preparing an extremely ultra-high temperature polyimide thermally conductive insulating material, comprising the following steps:

[0038] 100 parts of reactive polyimide resin synthesized from 2,3',3,4'-biphenyltetracarboxylic dianhydride, p-phenylenediamine and phenylethynyl phthalic anhydride, 10 parts of micron boron nitride Add powder, 3 parts of micron-sized PEEK particles, 1 part of lanthanum trioxide, and 5 parts of active diluent synthesized from phenylethynyl phthalic anhydride and aniline into a closed pressure-resistant kettle and stir evenly. Heat the mixed powder to 300°C and stir Vacuumize and degas for 30 minutes to obtain perfusion resin glue;

[0039] Pour the pouring resin glue into the mold, and cure it in a multi-stage gradient temperature program of 300°C / 1h+350°C / 2h+380°C / 2h to obtain a cured product of an ultra-ultra-high temperature polyimide thermally conductive insulating material. The DMA curve of the cured product of extremely ...

Embodiment 2

[0045] A method for preparing an extremely ultra-high temperature polyimide thermally conductive insulating material, comprising the following steps:

[0046] 100 parts (by mass) of a reactive poly Add imide resin, 5 parts of micron-sized boron nitride powder, 3 parts of micron-sized PEEK particles, 1 part of dilanthanum trioxide, and 5 parts of reactive diluent synthesized from phenylethynyl phthalic anhydride and aniline into a closed pressure-resistant kettle and stir Evenly, heat to 280°C, stir, vacuum and degas for 60 minutes to obtain the perfusion resin glue; pour the perfusion resin glue into the mold, and cure according to the multi-stage gradient heating program of 280°C / 1h+330°C / 2h+370°C / 2h , to obtain a cured product of an extremely ultra-high temperature polyimide thermally conductive insulating material. The cured product of ultra-ultra-high temperature polyimide thermal insulation material has a glass transition temperature of 390°C, an initial thermal decompos...

Embodiment 3

[0052] A method for preparing an extremely ultra-high temperature polyimide thermally conductive insulating material, comprising the following steps:

[0053] 100 parts of reactive polyimide resin synthesized by hexafluoroisopropyl phthalic anhydride, m-phenylenediamine and ethynyl phthalic anhydride, 10 parts of micron-sized boron nitride powder and 5 parts of micron-sized alumina powder , 5 parts of micron-sized PEEK particles, 0.5 parts of lanthanum trioxide, and 5 parts of active diluent synthesized from ethynyl phthalic anhydride and 1-naphthylamine were added to a closed pressure-resistant kettle and stirred evenly, heated to 200 ° C, stirred and vacuumed for degassing After 30 minutes, the perfusion resin glue was obtained; the perfusion resin glue was poured into the mold, and cured according to the temperature rise program of 250°C / 1h+310°C / 2h+360°C / 2h to obtain a cured product of the insulating material. The glass transition temperature of the cured product is 376°C,...

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Abstract

The invention discloses an ultrahigh-temperature polyimide heat-conducting insulating material and a preparation method thereof, and belongs to the field of high polymer materials. The ultrahigh-temperature polyimide heat-conducting insulating material comprises the following raw materials in parts by mass: 100 parts of reactive polyimide resin, 5-20 parts of a heat-conducting filler, 3-5 parts of a repairing agent, 0.5-3 parts of an anti-aging agent, and 1-10 parts of a reactive diluent. According to the preparation method of the ultrahigh-temperature polyimide heat-conducting insulating material, reactive polyimide resin is taken as a base material, the heat-conducting filler, the repairing agent, the anti-aging agent and the reactive diluent are added, a modified resin system is prepared by adopting a melt blending process, an insulating material system with the glass transition temperature being greater than 350 DEG C, the initial thermal decomposition temperature being greater than 500 DEG C, the heat conductivity coefficient being greater than 0.3 W / m.K, the electric breakdown strength being greater than 80kV / mm and the thermal expansion coefficient being less than 40PPM / DEG C is obtained by means of program temperature controlled curing, the excellent performance of the insulating material system meets the use requirements of sealing and insulation of special motor stator electromagnetic wire windings, and the material has a wide application prospect in the technical field of heavy oil thermal recovery.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an extremely ultra-high temperature polyimide heat-conducting insulating material and a preparation method thereof. Background technique [0002] High-temperature-resistant insulating materials are the key core technology for the development of high-performance new motors, especially for motors in some special application environments, which put forward higher requirements for high-temperature-resistant insulating materials; such as the field of heavy oil mining, the working environment of submersible electric pumps It must withstand high temperature and high pressure steam, and the surface temperature is as high as 370°C, which far exceeds the heat resistance level of traditional insulating materials. Baker Hughes Company of the United States is the leader in the research and development of high-temperature submersible electric pumps in the world. It has su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08L61/16C08L71/10C08K3/22C08K3/38C08K3/34C08K3/28
CPCC08L79/085C08K2003/385C08K2201/011C08K2003/2227C08K2003/221C08K2003/2213C08K2003/282C08K2003/222C08K2003/2296C08L2201/08C08L61/16C08K3/22C08K3/38C08L71/00C08K3/34C08K3/28
Inventor 熊需海王静陈平张承双李桂洋任荣姚健
Owner 辽宁鲸苇科技有限公司
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