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Vinyl silicon resin for reinforcing organic silicon pouring sealant and preparation method thereof
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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 resins, and achieve improved flexibility, high reinforcement effect, and high production efficiency Effect
Active Publication Date: 2013-01-02
GUANGZHOU GLORYSTAR CHEM +1
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It is also found through the search that there is no patent for the preparation of MDQ and MTQ silicone resins.
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specific Embodiment 1
[0018] Add 11.3g hexamethyldisiloxane, 28.8g tetramethyldivinyldisiloxane, 30g concentrated hydrochloric acid, 30g toluene, 15g ethanol, 45g water into a 500mL three-necked flask, and stir at 70-80°C under stirring. React for 3min, add 156g of ethyl orthosilicate to the bottle within 60min and react for 60min, transfer into a separating funnel and let stand for stratification, take out the lower layer mixed solution, wash with deionized water until neutral, and bake under reduced pressure and 130°C Dried to obtain vinyl MQ silicone resin.
[0019] Dissolve 7g of vinyl MQ silicone resin prepared above with 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 average particle size. It is 15μm alumina, 60g aluminum hydroxide with an average particle size of 23μm, 15.4g hydrogen-containing silicone oil with a hydrogen content of 0.35%, 0.38g platinum c...
specific Embodiment 2
[0020] Add 28.9g hexamethyldisiloxane, 8.3g tetramethyldivinyldisiloxane, 30g concentrated hydrochloric acid, 30g toluene, 15g ethanol, 45g water to a 500mL three-necked flask, and stir at 70-80°C under stirring. React for 3min, add 156g ethyl orthosilicate and 20.4g methyltrimethoxysilane to the bottle within 60min and react for 60min, transfer into a separating funnel and let stand for stratification, take out the lower layer mixed solution, wash with deionized water until neutral , under reduced pressure and drying at 130 ° C to obtain vinyl MTQ silicone resin.
[0021] Sample preparation is the same as Example 1
specific Embodiment 3
[0022] To a 500mL three-necked flask, add 17.94 hexamethyldisiloxane, 7.02g tetramethyldivinyldisiloxane, 30g concentrated hydrochloric acid, 45g ethanol, and 45g water, and react at 70-80°C for 5min under stirring. 156g of ethyl orthosilicate was added to the bottle within 60min to react for 30min, then 21.84g of hexamethyldisiloxane and 2.52g of tetramethyldivinyldisiloxane were added, reacted for 30min, transferred to a separatory funnel and left to stand for separation. layer, take out the lower mixed solution, wash with deionized water until neutral, and dry under reduced pressure at 130° C. to obtain vinyl MQ silicone resin.
[0023] The sample preparation was the same as in 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 an organic 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 high-tech fields such as electronic components, power circuit modules, large integrated circuit boards, and LEDs, and the working environment is more severe, it is required that the potting parts must be between low temperature and high temperature, High-speed rotation and other conditions require 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 have low viscosity, high toughness and impregnation, the impregnation rate between lines is greater...
Claims
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