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Preparation method of vinylphenyl silicon resin for LED (light-emitting diode) packaging

A vinyl phenyl and LED encapsulation technology, which is applied in the field of silicone resin preparation, can solve the problems of large pollution and poor resin stability, and achieve the effects of simple operation, stable product structure and quality, and cheap and easy-to-obtain raw materials

Active Publication Date: 2015-06-03
RUNHE ORGANICSILICONE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these patents use chlorine monomer or water glass as the main raw material, and the resin produced always has the problem of poor stability and relatively large pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment l

[0027] Into a 3000ml glass kettle, add 300ml of water, 500ml of toluene, 300ml of ethanol, MM20g, 1,3-divinyl-1,1,3,3-tetramethyldisiloxane 70g, concentrated hydrochloric acid (36.5wt% ) 20g, stirred rapidly at 40°C, and added dropwise an ethanol solution of 1000g of phenyltrimethoxysilane and 60g of methylphenyldimethoxysilane. Hydrolyze for 3 hours, then raise the temperature to 70°C and reflux for 5 hours, then stop the reaction, let the layers stand, remove the oil agent in the lower layer, neutralize it with aqueous sodium bicarbonate solution, wash it with deionized water until it is neutral, and use anhydrous chlorinated Calcium dries until clear and transparent. Add 20 g of silazane, react at 80°C for 3 hours, then raise the temperature, pull it down to 150°C under high vacuum -0.099Mpa for 6 hours, remove low boilers, and obtain 807g of clear and transparent vinyl phenyl silicone resin . The obtained product has a refractive index of 1.5145, a viscosity of 3300 ...

Embodiment 2

[0029]In a 3000ml glass kettle, add 300ml of water, 500ml of toluene, 300ml of ethanol, 100g of MM, 150g of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, concentrated hydrochloric acid (36.5wt%) ) 20 g, stirred rapidly at 40° C., and added dropwise 900 g of phenyltrimethoxysilane and 20 g of ethyl orthosilicate in ethanol. Hydrolyze for 3 hours, then heat up to 70°C and reflux for 5 hours, then stop the reaction, let stand to separate layers, remove the oil agent in the lower layer, neutralize it with aqueous sodium bicarbonate solution, add KOH 30 g, react at 80°C for 3 hours, cool down, and use Wash with deionized water until neutral, and dry with anhydrous calcium chloride until clear and transparent. Then the temperature was raised, and the temperature was lowered to 150°C under high vacuum -0.099Mpa for 6 hours to remove the low boilers, and 827g of vinyl phenyl silicone resin was obtained as a clear and transparent product. The obtained product had a refractive index of 1....

Embodiment 3

[0031] Into a 3000ml glass kettle, add water 300ml, toluene 500ml, ethanol 300ml, MM30g, 1,3-divinyl-1,1,3,3-tetramethyldisiloxane 170g, concentrated hydrochloric acid (36.5wt% ) 22g, stirred rapidly at 40°C, and added dropwise an ethanol solution of 800g of phenyltrimethoxysilane and 150g of methylphenyldimethoxysilane. Hydrolyze for 3 hours, then raise the temperature to 70°C and reflux for 5 hours, then stop the reaction, let the layers stand, remove the oil agent in the lower layer, neutralize it with aqueous sodium bicarbonate solution, wash it with deionized water until it is neutral, and use anhydrous chlorinated Calcium dries until clear and transparent. Add 20 g of silazane, react at 80°C for 3 hours, then raise the temperature, pull it down to 150°C under high vacuum -0.099Mpa for 6 hours, remove low boilers, and obtain 840g of clear and transparent vinyl phenyl silicone resin . The obtained product had a refractive index of 1.5356, a viscosity of 5358 mPa.s, a...

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Abstract

The invention relates to a preparation method of an organic silicon resin, particularly a preparation method of a vinylphenyl silicon resin for LED (light-emitting diode) packaging. The preparation method comprises the following steps: 1) adding water into a kettle, and adding a solvent; 2) adding a blocking agent, stirring, and adding an acidic catalyst; 3) stirring the mixed solution at normal temperature, dropwisely adding an ethanol solution of one or more of phenyl alkoxy silane, vinyl alkoxy silane and ethyl orthosilicate at 0-60 DEG C; 4) after finishing the dropwise addition, hydrolyzing for 30-600 minutes; 5) standing for 5-30 hours to stratify; and 6) treating with a condensation additive for an oil solution, and removing low boilers, thereby obtaining the product vinylphenyl silicon resin. The invention has the advantages of cheap and accessible raw materials, mild conditions and simple technique, and is simple to operate and convenient for industrialization.

Description

technical field [0001] The invention relates to a method for preparing an organic silicon resin, in particular to a method for preparing a vinyl phenyl silicone resin used for LED packaging. Background technique [0002] Compared with incandescent lamps and fluorescent lamps currently used, LED is a lighting method that is more energy-saving, environmentally friendly and requires higher technical requirements. Its power consumption is only 1 / 10 of these traditional light sources, and it does not use mercury that seriously pollutes the environment. , small in size and long in life, it is expected to become the fourth-generation light source after incandescent lamps, fluorescent lamps, and high-intensity gas discharge lamps. It can be said that the development of high-brightness LED is a revolutionary breakthrough in lighting technology. [0003] At present, the packaging material of ordinary LEDs is mainly transparent epoxy resin. With the development of white LEDs, packag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/20C08G77/06
Inventor 易有彬
Owner RUNHE ORGANICSILICONE NEW MATERIAL
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