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High-performance environmentally-friendly flame retardant type organic electron pouring sealant and preparation method thereof

A flame-retardant and silicone technology, which is applied in the field of environmentally friendly flame-retardant silicone electronic potting adhesive and its preparation, can solve the problems of difficult electronic component potting, high viscosity of potting glue, and high viscosity of rubber material, etc. , to achieve the effect of ensuring mechanical properties, good fluidity and moderate viscosity

Active Publication Date: 2013-06-05
GUANGZHOU GLORYSTAR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent application with the publication number CN101875725 discloses a vinyl silicone resin for reinforcing silicone encapsulant and its preparation method, which provides a vinyl MQ resin that can be used to reinforce silicone electronic encapsulant, However, judging from the experimental results, although it can play a certain reinforcing role, the resulting potting compound has a relatively high viscosity.
The use of white carbon black as a reinforcing material, although it can better improve the strength of silicone rubber, often results in high viscosity and poor fluidity of the reinforced rubber material, making it difficult to be used for potting of electronic components.
The Chinese patent application with the publication number CN101402798B discloses a heat-conducting and flame-retardant liquid silicone rubber for electronics. -1 ·K -1 ), but its viscosity has reached more than 10000mPa·s, the fluidity is poor, and it is difficult to sizing

Method used

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  • High-performance environmentally-friendly flame retardant type organic electron pouring sealant and preparation method thereof
  • High-performance environmentally-friendly flame retardant type organic electron pouring sealant and preparation method thereof
  • High-performance environmentally-friendly flame retardant type organic electron pouring sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Preparation of base material: Add 100 parts by weight of vinyl-terminated silicone oil, 50 parts by weight of thermally conductive filler, 5 parts by weight of reinforcing material and 40 parts by weight of flame retardant into a vacuum kneader. Under the condition of vacuum degree of 0.06~0.1MPa, add dropwise 0.3 parts by weight of compound coupling agent diluted with ethanol alcohol solution of water to it while stirring, then dehydrate and blend for 2 hours, cool and grind for 3 Obtain the base material for the first time;

[0035]Wherein, the vinyl-terminated silicone oil is a branched-chain vinyl-terminated silicone oil with a viscosity of 1000mPa·s (vinyl content is 0.1wt%) and a straight-chain vinyl-terminated silicone oil with a viscosity of 300mPa·s in a mass ratio of 7:2. (vinyl content is 0.1wt%); the thermally conductive filler is a mixture of alumina with a particle size of 1.6 μm and silicon micropowder with a particle size of 5 μm at a mass ratio of 1:...

Embodiment 2

[0040] 1) Preparation of base material: Add 100 parts by weight of vinyl-terminated silicone oil, 150 parts by weight of thermally conductive filler, 15 parts by weight of reinforcing material and 100 parts by weight of flame retardant into a vacuum kneader. Under the condition of vacuum degree of 0.06~0.1MPa, 1.0 parts by weight of compound coupling agent diluted with ethanol-alcohol solution of water was added dropwise to it while stirring, and then dehydrated and blended for 5 hours, and after cooling, it was ground with a three-roll machine for 4 Obtain the base material for the first time;

[0041] Wherein, the vinyl-terminated silicone oil is a branched-chain vinyl-terminated silicone oil with a viscosity of 1500mPa·s (vinyl content is 0.6wt%) and a straight-chain vinyl-terminated silicone oil with a viscosity of 600mPa·s in a mass ratio of 7:5. (vinyl content is 0.3wt%); the thermally conductive filler is a mixture of alumina with a particle size of 1 μm and silicon mic...

Embodiment 3

[0046] 1) Preparation of base material: Add 100 parts by weight of vinyl-terminated silicone oil, 100 parts by weight of thermally conductive filler, 10 parts by weight of reinforcing material and 70 parts by weight of flame retardant into a vacuum kneader, at 130°C, Under the condition of vacuum degree of 0.06~0.1MPa, 0.6 parts by weight of compound coupling agent diluted with ethanol alcohol solution of water was added dropwise to it while stirring, and then dehydrated and blended for 4 hours, cooled and ground with a three-roll machine for 3 Obtain the base material for the first time;

[0047] Wherein, the vinyl-terminated silicone oil is a branched-chain vinyl-terminated silicone oil with a viscosity of 1200mPa·s (vinyl content is 1wt%) and a straight-chain vinyl-terminated silicone oil with a viscosity of 500mPa·s in a mass ratio of 7:4 ( vinyl content is 0.5wt%); the thermally conductive filler is mixed with alumina with a particle size of 10 μm and silicon micropowder ...

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Abstract

The invention provides a high-performance environmentally-friendly flame retardant type organic electron pouring sealant and a preparation method thereof. Composite of branched chain type vinyl silicone oil with the viscosity of 1000-1500mPa.s and straight chain type vinyl-terminated silicone oil with the viscosity of 300-600mPa.s which are mixed in the mass ratio of 7:(2-5) is taken as base silicone oil, vinyl MQ silicon resin, precipitated white carbon black and gaseous white carbon black are taken as reinforced materials, aluminium oxide and silicon micropowder with the grain size of 1-10mum are taken as heat conduction fillers, and a mixed type coupler is added. The prepared high-performance environmentally-friendly flame retardant type organic electron pouring sealant has good comprehensive performances, high heat conduction performance and good mechanical properties and is environmentally-friendly and flame retardant, wherein the heat conductivity is 2.6-3.5W.m<-1>.K<-1>, the flowability is good, and the viscosity is 2000-3500mPa.s.

Description

technical field [0001] The invention relates to the technical field of electronic potting glue, in particular to an environment-friendly flame-retardant organic silicon electronic potting glue and its preparation technology. Background technique [0002] High-tech fields such as electronic components, large integrated circuit boards, and LEDs are gradually achieving high performance, high reliability, and miniaturization. Excellent high and low temperature resistance, mechanical properties, electrical insulation properties, but also good thermal conductivity, flame retardancy and fluidity. Currently used potting materials such as epoxy resin, polyurethane and silicone rubber are widely used. Silicone rubber can be used as the material of choice for potting electronic and electrical assemblies because it can maintain elasticity for a long time in a wide temperature range, and has good electrical properties and chemical stability. However, typical unfilled silicone rubber ha...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J11/04C09J11/06C09K3/10
Inventor 黄德裕屈哲辉胡新嵩何艺文罗科丽曾美婵夏文龙陈精华
Owner GUANGZHOU GLORYSTAR CHEM
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