Vinyl silicon resin for reinforcing organic silicon pouring sealant and preparation method thereof

A technology of vinyl silicone resin and silicone potting glue, which is applied in the field of silicone resin preparation, can solve the problems of not preparing MDQ and MTQ silicone resin, and achieve improved flexibility, high production efficiency, and high reinforcement effect Effect

Active Publication Date: 2010-11-03
GUANGZHOU GLORYSTAR CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also found through the search that there is no patent for the preparation of MDQ and MTQ silicone resins.

Method used

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  • Vinyl silicon resin for reinforcing organic silicon pouring sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0018] Add 11.3g of hexamethyldisiloxane, 28.8g of tetramethyldivinyldisiloxane, 30g of concentrated hydrochloric acid, 30g of toluene, 15g of ethanol, 45g of water into a 500mL three-necked flask, and stir at 70-80°C After reacting for 3 minutes, add 156g tetraethyl orthosilicate into the bottle for 60 minutes to react for 60 minutes, transfer it to a separatory funnel and let it stand for stratification, take out the mixed liquid in the lower layer, wash it with deionized water until it is neutral, and dry it under reduced pressure at 130°C Dry vinyl MQ silicone resin.

[0019] Dissolve 7g of the above-prepared vinyl MQ silicone resin in 10g of toluene, add it to 100g of vinyl silicone oil with a viscosity of 500mPa.s and a vinyl content of 1.2%, stir well, evaporate the solvent under reduced pressure, and add 140g of the average particle size 15μm aluminum oxide, 60g aluminum hydroxide with an average particle size of 23μm, 15.4g hydrogen-containing silicone oil with a hydr...

specific Embodiment 2

[0020] Add 28.9g of hexamethyldisiloxane, 8.3g of tetramethyldivinyldisiloxane, 30g of concentrated hydrochloric acid, 30g of toluene, 15g of ethanol, and 45g of water into a 500mL three-necked flask, and stir at 70-80°C After reacting for 3 minutes, add 156g of tetraethyl orthosilicate and 20.4g of methyl trimethoxysilane into the bottle for 60 minutes to react for 60 minutes, transfer to a separatory funnel and let it stand for stratification, take out the mixed solution in the lower layer, wash it with deionized water until neutral , Dry under reduced pressure and 130°C to obtain vinyl MTQ silicone resin.

[0021] Sample preparation is the same as Example 1

specific Embodiment 3

[0022] Add 17.94 g of hexamethyldisiloxane, 7.02 g of tetramethyldivinyl disiloxane, 30 g of concentrated hydrochloric acid, 45 g of ethanol, and 45 g of water into a 500 mL three-necked flask, and react at 70-80 °C for 5 min under stirring. Add 156g tetramethyldivinyldisiloxane and 21.84g hexamethyldisiloxane and 2.52g tetramethyldivinyldisiloxane into the bottle within 60min to react for 30min, then add 156g tetramethyldivinyldisiloxane, react for 30min, transfer to a separatory funnel and let it stand for separation. layer, take out the mixed solution of the lower layer, wash with deionized water until neutral, and dry under reduced pressure at 130°C to obtain vinyl MQ silicone resin.

[0023] Sample preparation is the same as Example 1.

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Abstract

The invention discloses a vinyl silicon resin for reinforcing an organic silicon pouring sealant and a preparation method thereof. The preparation method comprises the following steps of: adding an appropriate amount of hexamethyl disiloxane and tetramethyl divinylsiloxane into a mixture of hydrochloric acid, an organic solvent and water to perform reaction for some time and then adding tetraethoxysilane and bis-functional or trifunctional siloxane to perform reaction; adding a certain amount of hexamethyl disiloxane and tetramethyl divinylsiloxane according to circumstances, standing and demixing after the reaction is finished, washing lower mixed liquor with deionized water until the liquor is neutral, and drying the liquor to obtain the vinyl silicon resin. The spherical core of the silicon resin prepared by the method, namely SiO2 has high content, and the spherical shell is tightly encircled by an R3SiO0.5 layer, so the silicon resin has good reinforcing effect; and the resin hashigh solubility or dispersibility in silicon rubber, can be separately used as a reinforcing filler for the organic silicon pouring sealant, and can also be matched with other fillers, so that the organic silicon pouring sealant with required performance can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a silicone resin, in particular to a preparation method of a silicone resin used for reinforcing silicone potting glue. Background technique [0002] With the further realization of high performance, high reliability and miniaturization in electronic components, power circuit modules, large integrated circuit boards, LED and other high-tech fields, and the harsher working environment, it is required that the potting parts must be between low temperature and high temperature, Operating under conditions such as high-speed rotation, this requires potting materials to have excellent high and low temperature resistance, mechanical properties, electrical insulation properties, etc., in order to meet the special requirements of power circuits for potting materials. In addition, the potting material should generally be low viscosity, high toughness and impregnation, the impregnation rate between lines is greater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/20C08G77/06C08L83/07C08L83/05C08K3/22
Inventor 李豫胡新嵩林晓丹曾幸荣陈精华李国一
Owner GUANGZHOU GLORYSTAR CHEM
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