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Preparation method for tough epoxy acid anhydride impregnating varnish and impregnating varnish

An epoxy acid anhydride and impregnating paint technology, applied in the field of impregnating paint, can solve the problems of incompatibility between inorganic nanoparticles and epoxy resin, defects in impregnating paint, etc. Effect

Active Publication Date: 2012-08-01
ZHUZHOU TIMES ELECTRIC INSULATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, there is a big problem in the use of inorganic nanoparticles toughened epoxy resin as impregnation, that is, inorganic nanoparticles are not compatible with epoxy resin, which will inevitably lead to defects in the use of impregnation paint in the impregnation process

Method used

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  • Preparation method for tough epoxy acid anhydride impregnating varnish and impregnating varnish
  • Preparation method for tough epoxy acid anhydride impregnating varnish and impregnating varnish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 100.0g of bisphenol A epoxy resin into the reaction kettle, raise the temperature to 60°C, add 90.0g of methyltetrahydrophthalic anhydride, stir for 30min, then add 10.0g of POSS containing aliphatic epoxy groups, at a speed of 100 Continue stirring at -200rpm for 1h to form a uniform and transparent solution.

Embodiment 2

[0026] Put 100.0g of bisphenol F epoxy resin into the reaction kettle, raise the temperature to 60°C, add 70.0g of methyl nadic acid anhydride, stir for 30 min, then add 10.0g of POSS containing aliphatic epoxy group, continue at the speed of 100-200rpm Stir for 1 h to form a uniform and transparent solution.

Embodiment 3

[0028] Put 100.0g of novolac epoxy resin into the reaction kettle, raise the temperature to 60°C, add 80.0g of methyl nadic anhydride, stir for 30 min, then add 10.0g of POSS containing aliphatic epoxy groups, and continue stirring at a speed of 100-200rpm 1h to form a uniform and transparent solution.

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Abstract

The invention discloses a preparation method for touch epoxy acid anhydride impregnating varnish and impregnating varnish. The method comprises the following steps of: putting 100 parts by weight of epoxy resin into a reaction kettle; heating to 60 DEG C; adding 70-90 parts by weight of acid anhydride, and stirring at the rotating speed of 100-200 revolutions per minute for 30 minutes; adding 1-50 parts by weight of cage-shaped polyhedral oligomeric silsesquioxane (POSS); and continually stirring at the room temperature at the rotating speed of 100-200 revolutions per minute for 1 hour to form the epoxy acid anhydride impregnating varnish. The adopted cage-shaped POSS is cage-shaped POSS containing an active group or an inertial group capable of participating in an epoxy resin reaction, and the general formula can be shown as RXRY(SiO1.5)n, wherein n=8; x+y=8; and R can be one of an active aliphatic epoxy group, an aliphatic epoxy group, amino and hydrogen atom or one of inertial groups selected from phenyl, cyclopentyl, chloropropyl and p-nitrobenzene, and has superior comprehensive performance. Particularly, the toughness is improved remarkably, and the toughness of a material is improved by 10-200 percent.

Description

technical field [0001] The invention relates to a preparation method and the dipping paint, in particular to a preparation method and the dipping paint of a cage polyhedral oligomeric silsesquioxane (POSS) toughened epoxy anhydride dipping paint. Background technique [0002] Among the many materials used in the study of insulating structural systems, the study of impregnating varnishes is crucial. With the improvement of environmental protection requirements, the country's call for energy conservation and emission reduction has put forward higher requirements for the research of impregnated varnishes, and the research of impregnated varnishes has gradually turned to less-pollution and non-polluting environment-friendly impregnated varnishes. This requires impregnating paint not only to have high heat resistance, high mechanical properties and high temperature electrical properties, but also to have low volatility, or even no volatile content. Epoxy resin has excellent adhe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D163/04C09D163/00C09D7/12C08G59/42
Inventor 费明李鸿岩王楷赵慧宇
Owner ZHUZHOU TIMES ELECTRIC INSULATION
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