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Organosilicon insulating impregnating varnish and preparation method thereof

A technology of insulating impregnating varnish and silicone, applied in the direction of coating, etc., can solve problems such as high viscosity, polluting the environment, and endangering human health

Inactive Publication Date: 2012-06-27
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity of the solvent-free silicone impregnating varnish is too high at present, and the temperature resistance needs to be further improved, and toluene is still mostly used as the solvent when synthesizing the base resin, which pollutes the environment and endangers human health.

Method used

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  • Organosilicon insulating impregnating varnish and preparation method thereof

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Effect test

Embodiment 1

[0024] 1) Synthesis of polymethylphenylvinylsiloxane: dissolve 65 parts of methyltrimethoxysilane, 280 parts of diphenyldimethoxysilane, and 100 parts of vinyltrimethoxysilane in 260 parts of ethanol , slowly drop 85 parts of deionized, and adjust the pH to 3.5 with hydrochloric acid, after 2 hours of hydrolysis reaction at 50°C and 7 hours of condensation reaction at 80°C, solution 1# was obtained; 40 parts of hexamethyldisiloxane and 5 parts Dissolve deionized water in 20 parts of ethanol, add a certain amount of hydrochloric acid, adjust the pH to 3.0, and hydrolyze at 80°C for 1 hour to obtain solution 2#; slowly pour solution 2# into solution 1#, react at 70°C for 8 hours, and then let it stand Layered to get the lower layer of oil, which is polymethylphenyl vinyl siloxane;

[0025] 2) Synthesis of vinyl polyhedral oligomeric silsesquioxane: dissolve 100 parts of vinyltrimethoxysilane in 260 parts of ethanol, slowly add 40 parts of deionized water and a certain amount of ...

Embodiment 2

[0029] 1) Synthesis of polymethylphenylvinylsiloxane: dissolve 80 parts of methyltrimethoxysilane, 340 parts of diphenyldimethoxysilane, and 120 parts of vinyltrimethoxysilane in 300 parts of ethanol , slowly add 90 parts of deionized water and a certain amount of hydrochloric acid dropwise, adjust the pH to 3.0, after hydrolysis at 30°C for 3 hours and condensation reaction at 70°C for 9 hours, solution 1# is obtained; 50 parts of hexamethyldisiloxane and Dissolve 7 parts of deionized water in 35 parts of ethanol, add a certain amount of hydrochloric acid, adjust the pH to about 4, and hydrolyze at 50°C for 2 hours to obtain solution 2#; slowly pour solution 2# into solution 1#, and react at 80°C for 6 hours After standing still, the lower layer oily substance is obtained, which is polymethylphenyl vinyl siloxane.

[0030] 2) Synthesis of vinyl polyhedral oligomeric silsesquioxane: dissolve 110 parts of vinyltrimethoxysilane in 290 parts of ethanol, slowly add 45 parts of dei...

Embodiment 3

[0034] 1) Synthesis of polymethylphenylvinylsiloxane: dissolve 90 parts of methyltrimethoxysilane, 390 parts of diphenyldimethoxysilane, and 135 parts of vinyltrimethoxysilane in 300 parts of ethanol , slowly add 100 parts of deionized water and a certain amount of hydrochloric acid dropwise, adjust the pH to 2.8, after 2.5 hours of hydrolysis at 40°C and 8 hours of condensation reaction at 75°C, solution 1# is obtained; 55 parts of hexamethyldisiloxane and Dissolve 8 parts of deionized water in 40 parts of ethanol, add a certain amount of hydrochloric acid, adjust the pH to 6.0, and hydrolyze at 30°C for 3 hours to obtain solution 2#; slowly pour solution 2# into solution 1#, and react at 75°C for 7 hours Standing and stratifying to obtain the oily substance in the lower layer, which is polymethylphenyl vinyl siloxane;

[0035] 2) Synthesis of vinyl polyhedral oligomeric silsesquioxane: Dissolve 130 parts of vinyltriethoxysilane in 260 parts of ethanol, slowly add 40 parts of...

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Abstract

The invention discloses an organosilicon insulating impregnating varnish and a preparation method thereof. The organosilicon insulating impregnating varnish comprises a component A and a component B in a weight ratio of 1:1, wherein the component A comprises 100 parts of polymethylphenylvinylsiloxane and 0.9-1.5 parts of platinum catalyst and the component B comprises 30-75 parts of polyhedral oligomeric silsesquioxane with ethylene group and 40-60 parts of hyperbranched polysiloxane with Si-H bond. The polymethylphenylvinylsiloxane synthesized in the preparation method of the invention adopts ethanol as solvent and is no non-toxic and non-harmful; when the prepared impregnating varnish is solidified, no by-product with low molecular weight is discharged, thus not affecting the electric performance of the insulating material; in addition the impregnating varnish has good post impregnation effect, high temperature resistance and environmental friend.

Description

technical field [0001] The invention relates to an organosilicon insulating impregnating varnish, in particular to a high-temperature-resistant, solvent-free organosilicon insulating impregnating varnish and a preparation method thereof. It is a base resin based on polymethylphenylvinylsiloxane, Polyhedral oligomeric silsesquioxane containing vinyl (POSS-Vi) is used as a temperature-resistant additive, and hyperbranched polysiloxane containing silicon-hydrogen bonds (HBPSi-H) is used as a diluent and cross-linking agent. , Solvent-free, fast-curing two-component silicone insulating impregnating varnish. Background technique [0002] With the continuous advancement of science and technology, electrical appliances and other equipment are developing in the direction of high power, frequency conversion, small and light weight, high efficiency, durability and intelligence. At the same time, power transmission and transformation products are developing in the direction of high vol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/07C09D183/05C09D5/25
Inventor 顾嫒娟张北京梁国正袁莉
Owner SUZHOU UNIV
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