Anti-poisoning high-adhesion organic silicon heat-conductive sealant and preparation method thereof

A sealant, anti-poisoning technology, applied in chemical instruments and methods, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problem that the thermal conductivity of sealing silicone needs to be improved, the stability and life span are greatly affected, etc. problem, to achieve the effect of protecting platinum catalyst activity, good sealing and dustproof effect, and good bonding effect

Inactive Publication Date: 2019-03-22
YANTAI DARBOND TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Temperature has a huge impact on the stability and life of electronic devices. The thermal conductivity of ordinary silica gel is only about 0.1W / mK, and the thermal conductivity of sealed silica gel needs to be improved urgently.

Method used

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  • Anti-poisoning high-adhesion organic silicon heat-conductive sealant and preparation method thereof
  • Anti-poisoning high-adhesion organic silicon heat-conductive sealant and preparation method thereof
  • Anti-poisoning high-adhesion organic silicon heat-conductive sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Base material preparation: at room temperature, add 75 parts of vinyl-terminated silicone oil with a viscosity of 100000mPa.s, 5 parts of structure control agent dimethyldichlorosilane (DMDC), and 20 parts of fumed silica R974 to the kneading In the machine, the rotation speed is 50rpm, mixed at 150°C for 2 hours, and vacuumized to obtain the base material;

[0039] Preparation of thermally conductive sealant: at room temperature, add 72 parts of base material to a double planetary mixer, methyl hydrogen polysiloxane, such as structural formula (1), wherein M=1, N=5, 12 parts, inhibitor 2- 0.5 parts of methyl-3-butyn-2-ol, after mixing evenly, add special diluent polyvinyl silicone oil, viscosity 500mPa.s, vinyl content 0.1wt%, 10 parts, anti-poisoning agent platinum (0)- 0.5 parts of divinyltetramethyldisiloxane complex, adhesive, such as structural formula (2), wherein m=2, n=2, R 1 =-CH 3 , 4 parts, 1 part of adhesion promoter methyl borate, platinum catalyst plati...

Embodiment 2

[0041] Base material preparation: at room temperature, add 80 parts of vinyl-terminated silicone oil with a viscosity of 50000mPa.s, 4 parts of structural control agent methyltrimethoxysilane (MTMO), and 25 parts of fumed silica R972 to the In the kneader, the rotation speed is 50rpm, mixed at 150°C for 2 hours, and vacuumized to obtain the base material;

[0042] Preparation of thermally conductive sealant: at room temperature, add 65.8 parts of base material to a double planetary mixer, methyl hydrogen polysiloxane, such as structural formula (1), wherein M=2, N=1, 6.7 parts, inhibitor acetylene ring 0.2 parts of hexanol, after mixing evenly, add special diluent polyvinyl silicone oil, viscosity 2000mPa.s, vinyl content 0.055wt%, 20 parts, anti-poisoning agent platinum (0)-vinyl amino complex, 1 part , adhesive, such as structural formula (3), wherein, x=3, y=2, 5 parts, adhesion promoter ethyl borate, 1.2 parts, platinum catalyst platinum (0)-divinyltetramethyldisiloxane ...

Embodiment 3

[0044] Preparation of base material: at room temperature, 56.8 parts of vinyl-terminated silicone oil with a viscosity of 100000mPa.s, 19.2 parts of vinyl-terminated silicone oil with a viscosity of 10000mPa.s, and 4.5 parts of hexamethyldisilazane (HMDZ) as a structural control agent , Vapor-phase process silica DM-20, 30 parts, added to the kneader in turn at 50 rpm, mixed at 150°C for 2 hours, and vacuumed to obtain the base material.

[0045] Preparation of thermally conductive sealant: at room temperature, add 79.6 parts of base material to a double planetary mixer, methyl hydrogen polysiloxane, such as structural formula (1), wherein M=5, N=3, 12 parts, inhibitor 3- 0.6 parts of methyl-1-pentyn-3-ol, after mixing evenly, add special diluent polyvinyl silicone oil, viscosity 1000mPa.s, vinyl content 0.07wt%, 15 parts, anti-poisoning agent platinum (0)- Divinyltetramethyldisiloxane complex, 0.6 part, anti-poisoning agent platinum (0)-vinyl amino complex platinum (0)-vinyl ...

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Abstract

The invention relates to an anti-poisoning high-adhesion organic silicon heat-conductive sealant and a preparation method thereof. The anti-poisoning high-adhesion organic silicon heat-conductive sealant comprises 56.3-88.2 parts of base stock, 1-15 parts of methyl hydrogenated polysiloxane, 5-20 parts of special diluent, 0.1-1 part of anti-poisoning agent, 2-6 parts of adhesive, 0.5-3 parts of adhesion accelerator, 0.1-1 part of catalyst, 0.01-1 part of inhibitor, 30-60 parts of solvent and 300-500 parts of heat-conductive filler. The heat-conductive sealant prepared according to the invention is an additive silica gel, with excellent heat-conducting property, high weather resistance, high ultraviolet aging resistance and excellent hydrothermal property; the heat-conductive sealant is suitable for outdoor long-term use; the heat-conductive sealant also has excellent anti-poisoning property, has excellent adhesiveness with PCB (Printed Circuit Board) and metal materials, such as silverand aluminum, and can be combined with electron devices for achieving the functions of sealing and preventing dust.

Description

technical field [0001] The invention relates to an anti-poisoning high-adhesion heat-conducting sealant, which belongs to the field of heat-conduction sealants. technical background [0002] With the enhancement of people's awareness of environmental protection, the reaction of addition-type silicone has no by-products, which meets the requirements of environmental protection, and because of its good elasticity after curing, excellent weather resistance and high and low temperature resistance, it is widely used in electronic devices to play a role in sealing and preventing Dust, the role of protecting components. However, the platinum catalyst used in the addition-type liquid silicone is extremely poisonous, and the problems such as poor adhesion after curing severely limit its application range. [0003] With the maturity of silicone sealant application technology, people put forward diversified requirements for its functionality. Temperature has a huge impact on the stab...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J183/05C09J11/04C09J11/06C09J11/08C09K5/14
CPCC08L2201/08C08L2205/025C08L2205/035C09J11/04C09J11/06C09J11/08C09J183/04C09K5/14C08L83/04C08K3/36C08K5/54C08K5/55C08K13/04C08K7/18
Inventor 代振楠陈维陈田安
Owner YANTAI DARBOND TECH
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