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A filling type thermally conductive and insulating impregnating varnish

A technology of thermal conductivity, insulation and impregnation paint, applied in coatings, epoxy resin coatings, etc., can solve the problems of complex synthesis process and high cost of thermally conductive and insulating polymers, and achieve the effect of improving compatibility and thermal conductivity.

Inactive Publication Date: 2011-12-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high cost and complex synthesis process of thermally conductive insulating polymers prepared by this method limit its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] With nano-SiC as the initial raw material, 110 o C. Dry in vacuum for 24 hours to remove the impurities in the raw material, and then modify the surface by grafting silane coupling agents KH550, KH570, and A151 to obtain silanized silicon carbide nanopowders.

[0024] 1) Add 100ml of absolute ethanol to the flask, add 20g of powder and 1ml of KH570, sonicate for 30 minutes, stir and reflux for 2-4h until all are suspended, wash repeatedly, suction filter, 110 o After C vacuum drying for 10-24h, organically treated nano-powder KH570-SiC is obtained;

[0025] 2) Add 10 parts of KH570-SiC, 60 parts of styrene, 0.5 parts of dicumyl peroxide and 0.1 part of dispersant sodium lauryl sulfate to 100 parts of imine-modified epoxy resin, and stir for 40 minutes at room temperature , ultrasonic for 30min, test a part of the sample with a viscosity tester, pour the other part into the mold, put it in a vacuum drying oven for vacuum defoaming, and heat up to 120 o Cured at C for 2...

Embodiment 2

[0027] With nano-alumina as the initial raw material, 110 o C Vacuum drying for 24 hours to remove impurities in the raw material, then surface modified grafted silane coupling agents KH550, KH570, A151, and then reacted with hyperbranched polyester under the action of a catalyst to obtain hyperbranched grafted nanopowder.

[0028] 1) Add 100ml of absolute ethanol to the flask, add 2g of powder and 1ml of KH550, ultrasonic for 30 minutes, stir and reflux for 2-4h until all suspended, wash repeatedly, suction filter, 110 o C Vacuum drying for 10-24h to obtain organic treated nano-powder KH550-Al 2 o 3 ;

[0029] 2) Add 10g KH550-Al to the flask 2 o 3 For nano powder, add 10g 2,2-bis(hydroxymethyl)propionic acid, 0.5g p-toluenesulfonic acid and 50ml DMF, after ultrasonication for 30 minutes, seal, reflux in nitrogen atmosphere for 4h until the reaction is complete, suction filtration, repeat washing, 110 o C vacuum drying to obtain hyperbranched modified nano-powder HAPE-A...

Embodiment 3

[0032] With nano-MgO as the initial raw material, 110 oC Vacuum drying for 24 hours to remove impurities in the raw material, then surface modified grafted silane coupling agents KH550, KH570, A151, and then reacted with hyperbranched polyamide-amine under the action of a catalyst to obtain hyperbranched grafted nanopowder.

[0033] 1) Add 100ml of absolute ethanol to the flask, add 30g of powder and 1.5ml of A151, sonicate for 30 minutes, stir and reflux for 2-4h until all are suspended, wash repeatedly, suction filter, 110 o After C vacuum drying for 10-24h, the organically treated nano-powder A151-MgO is obtained;

[0034] 2) Add 20 g of A151-MgO nanopowder, 100 ml of water and 100 ml of ethanol into the flask, ultrasonically disperse for 30 minutes, stir electrically and flow argon for 30 minutes, add 0.2 g of ammonium persulfate, 20 ml of methyl acrylate monomer, seal, Reflux for 6h in an argon atmosphere until the reaction is complete, then add 20ml of EDA, filter with ...

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PUM

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Abstract

The invention discloses a filling-type heat-conducting and insulating impregnating varnish, which is characterized in that the impregnating varnish uses surface-functionalized inorganic powder with high thermal conductivity and high insulation performance as filler, and adds it to modified epoxy resin Add dispersants, peroxide initiators and reactive diluents, mix evenly and cure at 25-150oC to obtain high thermal conductivity insulating dipping varnish. The composition and weight ratio are as follows: surface functionalized nano powder Body filler, 1-30 parts; modified epoxy resin, 100 parts; active diluent, 60-80 parts; dispersant, 0.01-1 part; peroxide initiator, 0.5-2.0 parts. The thermal conductivity of the thermally conductive dipping varnish is greatly improved without sacrificing electrical resistivity and mechanical properties.

Description

Technical field [0001] The present invention involves a kind of high -heat -conducting insulation and impregnation paint. This impregnation paint is a fillers with surface functional high heat -conducting and high insulation properties.In the field of high -heat guidance insulation material preparation technology, the thermal immersion paint is mainly used in insulation and immersion treatment of motors, transformers, and scattered anti -winding coils, and encapsulation and bonding of electronic components. Background technique [0002] Insulation and immersion paint is used for motors, transformers, and electrical products coils. To fill the gap between the coil gap and the coil and the surrounding objects, bond the coil guide line and the wire, the wire and other objects to make them a oneOn the whole, the insulation material that improves coil mechanics, electrical strength and protection performance. At the same time, insulation and impregnation paint can also be used in the ...

Claims

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Application Information

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IPC IPC(8): C09D163/10C09D4/06C09D7/12C09D5/25
Inventor 付继芳陈立亚施利毅丁郭君陈怡钟庆东
Owner SHANGHAI UNIV
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