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Organic silicon pouring sealant containing functional group MQ resin for LED and preparation method of organic silicon pouring sealant

A silicone potting, functional-based technology, used in adhesives, adhesive additives, polymer adhesive additives, etc., can solve the loss of sealing protection of LEDs, the lack of reinforcing silicone rubber, and the effect of silicone rubber transparency, etc. problems, to achieve the effects of excellent compatibility, moderate viscosity and improved mechanical properties

Active Publication Date: 2016-07-13
深圳市欧普特工业材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the addition-type silicone rubber has poor adhesion to the base material. Vibration during use may cause the silicone rubber to fall off, and moisture will easily penetrate into the LED through the gap between the silicone rubber and the base material, which will cause the LED to lose its sealing protection and reduce the LED's performance. service life
At the same time, the tensile strength of the addition-type silicone rubber without reinforcement is less than 0.5MPa, which cannot meet the requirements of use.
[0004] Chinese patent CN103589387A discloses a kind of adhesive prepared by reacting tetramethylcyclotetrasiloxane, allyl glycidyl ether and vinyl trimethoxysilane, which improves the adhesion of organic silicon potting glue and substrate for LED. The bonding strength is up to 0.4MPa. The potting compound without adhesive has no bonding strength, but the bonding property is still small. It is necessary to further improve the bonding strength of the potting compound to achieve better sealing protection and delay the use of LEDs. life
[0005] Chinese patent CN103122149A discloses a method for improving the adhesion of addition-type silicone rubber for LED packaging with epoxy-modified silicone oil. The bond strength of the prepared silicone rubber to the PPA support is greater than 0.9MPa, but this epoxy-modified silicone oil does not The role of reinforcing silicone rubber
At present, these patents do not involve additives that have both reinforcing and bonding properties, and the adhesives sold on the market have a single function and are expensive, which affects the transparency of silicone rubber. Adding a tackifier, so it is of great significance to develop additives with reinforcement and tackification, and to prepare silicone potting adhesives for highly transparent LEDs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The active hydrogen-containing mass fraction of 5% hydrogen-containing MQ resin, allyl glycidyl ether, γ-methacryloyloxypropyl trimethoxysilane, o-hydroxyanisole is 100:21:0:0.5 The weight ratio was added to a three-necked flask with a reflux device, 10 ppm of vinylsiloxane complex of chloroplatinic acid was added under stirring, added to 100 ° C, reacted for 4 hours, maintained at high temperature, and the mixture was heated to a pressure of -Under the condition of 0.1MPa, the functional group MQ resin a was obtained by vacuum distillation;

[0037] The vinyl silicone oil with a viscosity of 1000 mPa s, the methyl vinyl MQ resin with a vinyl content of 3.5% (at 25 ° C, the viscosity is 9500 mPa s), the functional group MQ resin a, the methyl silicone oil, and the platinum content are The catalyst of 2000ppm is mixed uniformly in the mass ratio of 100:35:20:0:2 to make component A; the vinyl silicone oil with a viscosity of 1000 mPa s and the methyl vinyl MQ resin with ...

Embodiment 2

[0040] The active hydrogen content of 5% hydrogen-containing MQ resin, allyl glycidyl ether, γ-methacryloyloxypropyl trimethoxysilane, o-hydroxyanisole is 100:0:46:5 The weight ratio was added to a three-necked flask with a reflux device, 10ppm of vinylsiloxane complex of chloroplatinic acid was added under stirring, added to 120 ° C, reacted for 2 hours, maintained at high temperature, and the mixture was heated to a pressure of - Under the condition of 0.08MPa, the functional base MQ resin b was obtained by vacuum distillation;

[0041]The vinyl silicone oil with a viscosity of 20000 mPa·s, methyl vinyl MQ resin with a vinyl content of 2% (at 25°C, the viscosity is 4500 mPa·s), functional MQ resin b, and methyl vinyl with a viscosity of 500 mPa·s were successively mixed. The base silicone oil and the catalyst with a platinum content of 6000 ppm are mixed uniformly in the mass ratio of 100:10:1:25:0.02 to prepare the A component; the vinyl silicone oil with a viscosity of 200...

Embodiment 3

[0044] The active hydrogen-containing mass fraction of 5% hydrogen-containing MQ resin, allyl glycidyl ether, γ-methacryloyloxypropyl trimethoxysilane, o-hydroxyanisole is 100:10.5:23:1 The weight ratio was added to a three-necked flask with a reflux device, and 10 ppm of vinylsiloxane complex of chloroplatinic acid was added under stirring, added to 110 ° C, reacted for 3 hours, maintained at high temperature, and the mixture was heated to a pressure of -Under the condition of 0.09MPa, the functional group MQ resin c was obtained by vacuum distillation;

[0045] Vinyl silicone oil with a viscosity of 10000 mPa·s, methyl vinyl MQ resin with a vinyl content of 3% (at 25°C, a viscosity of 5000 mPa·s), functional MQ resin c, and methyl vinyl with a viscosity of 50 mPa·s were successively mixed. Base silicone oil and a catalyst with a platinum content of 4000 ppm are mixed uniformly in a mass ratio of 100:25:15:15:1 to make component A; the vinyl silicone oil with a viscosity of 1...

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Abstract

The invention discloses an organic silicon pouring sealant containing functional group MQ resin for an LED and a preparation method of the organic silicon pouring sealant. The organic silicon pouring sealant comprises a component A and a component B, wherein the component A is a mixture of vinyl silicone oil, methyl vinyl MQ resin, functional group MQ resin, methyl silicone oil and a catalyst in a weight rate of 100 to (10-35) to (1-20) to (0-25) to (0.02-2); the component B is a mixture of vinyl silicone oil, methyl vinyl MQ resin, hydrogen-containing silicone oil, methyl silicone oil and an inhibitor in a weight rate of 100 to (10-35) to (10-50) to (0-25) to (0.001-0.02). By virtue of the functional group MQ resin, the adhesion of the pouring sealant to an LED bracket material can be substantially improved, the mechanical property of the pouring sealant can be improved, and furthermore, the transparency of the pouring sealant is not influenced. Meanwhile, the preparation method is simple and convenient, and the industrial production is easily realized.

Description

technical field [0001] The invention relates to an organic silicon potting compound for LEDs and a preparation method thereof, in particular for the potting and sealing of LEDs. Background technique [0002] Addition silicone rubber has good optical properties, no yellowing under high temperature environment, no heat absorption or exotherm during curing, small shrinkage rate after curing, water resistance, ozone resistance, weather resistance, excellent electrical properties and chemical stability, etc. The advantage is that it is an ideal material for LED packaging. [0003] However, the addition-type silicone rubber has poor adhesion to the substrate. Vibration during use may cause the silicone rubber to fall off. Moisture easily penetrates into the interior of the LED through the gap between the silicone rubber and the substrate, which will cause the LED to lose its sealing protection and reduce the LED's performance. service life. At the same time, the unreinforced add...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J183/04C09J183/05C09J11/08
CPCC08L2203/206C08L2205/025C08L2205/035C09J11/08C09J183/04C08L83/04
Inventor 刘诚郎咸鑫谭培于王天勇吴先信柴建功
Owner 深圳市欧普特工业材料有限公司
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