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Preparation method of high-heat conductivity and single-component silicon rubber

A silicone rubber, one-component technology, used in adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of low thermal conductivity of sealants, and meet the requirements of adhesion and durability, raw material cost The effect of low cost and excellent thermal conductivity

Active Publication Date: 2013-02-13
SICHUAN KELIXIN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency of low thermal conductivity of the sealant manufactured by the existing technology, and to provide a preparation method of high thermal conductivity single-component silicone rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of high thermal conductivity one-component silicone rubber, comprising the following steps:

[0024] A. Add stearic acid dropwise to 50°C 3 Make a solution with a concentration of 20% in fatty alcohol, then add a small amount of defoamer to the solution and stir evenly, add dried white carbon black to the solution, after immersion is complete, disperse and stir at high speed for 30 minutes, and add a consistency of 100 mP·s aminohydrocarbon-based silicone oil, after mixing evenly, the solvent is removed to obtain surface-treated white carbon black;

[0025] B. 8 parts by mass of surface-treated white carbon black, 100 parts by mass of end-capped α, ω-dihydroxy polydimethylsiloxane, and aluminum oxide modified by chloropropyltrimethoxysilane 35 parts by mass, 130 parts by mass of quartz powder modified by chloropropyltrimethoxysilane, a mixture of methylphenyl silicone oil and dioctyl phthalate (mass mixing ratio 13:2) 15 parts by mass stirred Af...

Embodiment 2

[0030] A preparation method of high thermal conductivity one-component silicone rubber, comprising the following steps:

[0031] A. Add stearic acid dropwise to 35°C C 2 Make a solution with a concentration of 25% in fatty alcohol, then add a small amount of antifoaming agent into the solution and stir evenly, add dried white carbon black into the solution, after immersion is complete, disperse and stir at high speed for 30 minutes, and add a consistency of 100 mP·s ethyl silicone oil, after mixing evenly, the solvent is removed to obtain surface-treated white carbon black;

[0032] B. 10 parts by mass of surface-treated white carbon black, 100 parts by mass of end-capped α, ω-dihydroxy polydimethylsiloxane, 100 parts by mass of dihydroxypolydimethylsiloxane modified by bromopropyltriethoxysilane, 20 parts by mass of aluminum, 150 parts by mass of quartz powder modified by bromopropyltriethoxysilane, 20 parts by mass of a mixture of ethyl silicone oil and dibutyl phthalate ...

Embodiment 3

[0037] A preparation method of high thermal conductivity one-component silicone rubber, comprising the following steps:

[0038] A. Add hexamethyldisilazide dropwise to 60°C C 8 Make a solution with a concentration of 10% in fatty alcohol, then add a small amount of defoamer to the solution and stir evenly, add dried white carbon black to the solution, after immersion is complete, disperse and stir at high speed for 30 minutes, and add a consistency of 100 mP·s phenyl silicone oil, after mixing evenly, the solvent is removed to obtain surface-treated white carbon black;

[0039] B. 1 part by mass of surface-treated white carbon black, 100 parts by mass of α, ω-dihydroxy polydimethylsiloxane after end-capping treatment, 100 parts by mass of chloropropyl triethoxysilane modified 50 parts by mass of aluminum, 120 parts by mass of quartz powder modified with chloropropyltriethoxysilane, 25 parts by mass of a mixture of phenyl silicone oil-based silicone oil and dibutyl phthalat...

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Abstract

The invention discloses a preparation method of heat-thermal conductivity and single-component silicon rubber, comprising the following steps of: treating white carbon black by a solvent which is mixed with a surface treating agent in a heating way, so that the surface structure of the carbon black can be furthest stretched, and mixing the white carbon black, surface-treated quartz powder and aluminum oxide, so that the effective heat-conducting contact area can be guaranteed to be maximum, a heat-conducting way can be guaranteed to be shortest, and the optimal heat-conducting effect can be achieved. The single-component silicon rubber with excellent heat-conducting property can be prepared by the action of a plasticizer, a crosslinking agent and a catalyst. The preparation method has the advantage that the obtained single-component silicon rubber meets the caking property and the durability, and has good heat conductivity.

Description

technical field [0001] The invention relates to the field of rubber preparation, in particular to a preparation process of silicone rubber. Background technique [0002] The anti-seismic cushioning, waterproof, and anti-oxidation sealants used for devices in high-temperature environments must have a certain thermal conductivity while having both sealing and bonding performance and durability, otherwise the device will be unstable due to excessive local temperature , or even damage the system. [0003] Due to the problem of the preparation process, it is difficult for the sealant on the existing market to ensure excellent thermal conductivity while having good sealing and bonding performance and durability. The thermal conductivity is usually only 1~2 W / m k. Therefore, it is necessary to develop a sealant product that integrates excellent properties such as adhesion, durability and thermal conductivity. Contents of the invention [0004] The purpose of the present invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08K13/06C08K9/06C08K9/04C08K3/36C08K3/22C09J183/06C09J11/04
Inventor 孙建厅
Owner SICHUAN KELIXIN NEW MATERIALS CO LTD
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