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Method for preparing MQ silicon resin by organic acid catalysis

A technology for MQ silicone resin and catalytic preparation, applied in the field of organic acid catalyzed preparation of MQ silicone resin, can solve the problems of shortening the service life of packaging materials, reducing the aging resistance of packaging materials, affecting the dielectric properties of devices and equipment, etc., to increase the use of The effect of life, prolonging the use time, and improving the aging resistance

Inactive Publication Date: 2009-12-30
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the MQ silicone resin catalyzed by this type of acid is used for the packaging of electronic devices and equipment, a large number of inorganic ions such as Cl - and SO 4 2- The existence of etc. will affect the dielectric properties of devices and equipment, reduce the aging resistance of packaging materials, and shorten the service life of packaging materials

Method used

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  • Method for preparing MQ silicon resin by organic acid catalysis
  • Method for preparing MQ silicon resin by organic acid catalysis

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Example 1 Add 624g of tetraethyl orthosilicate and 292g of hexamethyldisiloxane into a reactor with a mechanical stirring and condensing device, slowly add 160mL of an aqueous solution containing 9.2g of p-toluenesulfonic acid, and raise the temperature to 115°C for reaction 10h. After the reaction, neutralize with a certain amount of ammonia water, add 500mL of toluene, separate the liquid and wash with water until neutral, distill toluene and low boilers under reduced pressure at 80°C, and recover them, and continue vacuuming for 1 hour to obtain solid MQ Silicone.

Embodiment 2

[0015] Example 2 Add 624g of tetraethyl orthosilicate and 292g of hexamethyldisiloxane into a reactor with a mechanical stirring and condensing device, slowly add 160mL of an aqueous solution containing 9.2g of p-toluenesulfonic acid, and raise the temperature to 90°C for reaction 10h. After the reaction, neutralize with a certain amount of ammonia water, add 500mL of toluene, separate the liquid and wash with water until neutral, distill toluene and low boilers under reduced pressure at 80°C, and recover them, and continue vacuuming for 1 hour to obtain solid MQ Silicone.

Embodiment 3

[0016] Example 3 Add 624g of tetraethyl orthosilicate, 97g of hexamethyldisiloxane and 111g of vinyl double caps into a reactor with a mechanical stirring and condensing device, slowly add 160mL of 9.2g of p-toluenesulfonic acid Aqueous solution, heated to 115 ° C hydrolysis reaction 10h. After the reaction, neutralize with a certain amount of ammonia water, add 500mL of toluene, separate the liquid and wash with water until neutral, distill toluene and low boilers under reduced pressure at 80°C, and recover them, and continue vacuuming for 1 hour to obtain solid MQ Silicone.

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Abstract

The invention relates to a method for preparing MQ silicon resin by organic acid catalysis, which is characterized in that four-functional-group monomer and end capping agent that have the mole ratio of 90-30:10-70 are added into a reactor provided with a mechanical stirring and reflex condensing device; then, organic acid catalyst is slowly added, and the dosage of the organic acid catalyst is 0.1-5% of the total weight; the temperature raises to 115DEG C, and the reaction lasts for 10h, so that the liquid or solid MQ silicon resin can be obtained. The method has the advantages that the catalyst contains no inorganic ions; the obtained MQ silicon resin contains lower content inorganic ions; the MQ silicon resin can be used as reinforcing agent of addition type or condensed type silicon rubber and used for encapsulating electronic devices, so as to improve the ageing-resistant performance of the silicon rubber and prolong the service life of encapsulation materials, thus prolonging the service life of the electronic devices.

Description

technical field [0001] The invention relates to an organic acid catalyzed preparation of MQ silicone resin. Background technique [0002] Light-emitting diodes, referred to as LEDs, have the advantages of high efficiency, pure light color, low energy consumption, long life, fast response, no pollution, and all solid-state, and are called green "solid-state lighting". LEDs are mainly composed of chips and packaging materials. For packaging materials, epoxy resin is currently used more. However, high-power LEDs require packaging materials to be resistant to high temperature and ultraviolet rays, and epoxy resin is easy to age and degrade under these conditions, which affects luminous efficiency. Silicone rubber and silicone resin can meet the requirements of high-power LED packaging. A large amount of money has been invested in research and development in this field. [0003] Silicone rubber is one of the most important products among silicone materials, and it has very exce...

Claims

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Application Information

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IPC IPC(8): C08G77/08C08G77/12C08G77/18C08G77/20
Inventor 陈义旺徐镇田周魏华肖书琴李璠贺晓慧谈利承谌烈
Owner NANCHANG UNIV
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