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Silicone rubber for heat-conduction silicone sheet and preparation method of silicone rubber

A technology of silicone rubber and heat-conducting silicon, which is applied in the field of silicone rubber for heat-conducting silicone skin and its preparation, can solve the problem of high vulcanization temperature, and achieve the effects of no pollution to the mold, excellent flame retardant performance, and good thermal conductivity

Inactive Publication Date: 2019-05-21
GUANGDONG POLYSIL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat conduction pressure of the heat conduction silicone skin prepared by this method is evenly distributed, and the heat conduction performance is good, but the vulcanizing agent used in this method is DCP, which not only has a high vulcanization temperature, but also produces ketone or aldehyde decomposition products during long-term use, which is unfavorable to heat dissipation devices. Impact

Method used

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  • Silicone rubber for heat-conduction silicone sheet and preparation method of silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The components in parts by mass are as follows: 5 parts of raw methyl vinyl silicone rubber with a molecular weight of 500,000 and a vinyl content of 3.0%, and raw methyl vinyl silicone rubber with a molecular weight of 650,000 and a vinyl content of 0.05%. 50 parts, 45 parts of methyl vinyl silicone rubber raw rubber with a molecular weight of 600,000 and a vinyl content of 0.22%, and a BET method specific area of ​​200m 2 25 parts / g of fumed white carbon black, the specific area is 65m 2 35 parts of superconducting acetylene carbon black per gram, 125 parts of silicon carbide with a particle size of 18 μm, 100 parts of silicon carbide with a particle size of 6.5 μm, 4.0 parts of hydroxy silicone oil with a viscosity of 25 mPa.s, 0.3 parts of zinc stearate, ethylene 1.5 parts of trimethoxysilane, 1.0 parts of hydrogen-containing silicone oil with an active hydrogen mass fraction of 0.7%, and a mass fraction of platinum of 1.0×10 -5 Alcohol-modified chloroplatinic acid...

Embodiment 2

[0067] The components in parts by mass are as follows: 5 parts of methyl vinyl silicone rubber raw rubber with a molecular weight of 450,000 and a vinyl content of 2.0%, methyl vinyl silicone rubber raw rubber with a molecular weight of 600,000 and a vinyl content of 0.08% 50 parts, 45 parts of methyl vinyl silicone rubber raw rubber with a molecular weight of 550,000 and a vinyl content of 0.3%, and a BET method specific area of ​​150m 2 20 parts / g of fumed white carbon black, the specific area is 65m 2 40 parts per gram of superconducting acetylene carbon black, 125 parts of silicon carbide with a particle size of 15 μm, 125 parts of silicon carbide with a particle size of 10 μm, 6.0 parts of hydroxyl silicone oil with a viscosity of 28 mPa.s, 0.5 parts of zinc stearate, vinyl 2.0 parts of trimethoxysilane, 0.5 parts of hydrogen-containing silicone oil with a mass fraction of active hydrogen of 0.8%, and a mass fraction of platinum of 1.0×10 -4 Alcohol-modified chloroplatin...

Embodiment 3

[0070] The components in parts by mass are as follows: 5 parts of raw methyl vinyl silicone rubber with a molecular weight of 400,000 and a vinyl content of 4.0%, and raw methyl vinyl silicone rubber with a molecular weight of 700,000 and a vinyl content of 0.03%. 50 parts, 45 parts of methyl vinyl silicone rubber raw rubber with a molecular weight of 500,000 and a vinyl content of 0.2%, and a BET method specific area of ​​380m 2 30 parts / g of fumed silica, the specific area is 65m 240 parts per gram of superconducting acetylene carbon black, 100 parts of silicon carbide with a particle size of 15 μm, 100 parts of silicon carbide with a particle size of 10 μm, 2.0 parts of hydroxyl silicone oil with a viscosity of 35 mPa.s, 0.4 parts of zinc stearate, vinyl 1.0 parts of trimethoxysilane, 0.8 parts of hydrogen-containing silicone oil with an active hydrogen mass fraction of 0.5%, and a mass fraction of platinum of 1.0×10 -6 Alcohol-modified chloroplatinic acid catalyst 1.0 par...

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Abstract

The invention discloses silicone rubber for a heat-conduction silicone sheet. The silicone rubber for the heat-conduction silicone sheet specifically comprises the following raw materials: methyl vinyl raw silicone rubber, white carbon black, superconductive acetylene carbon black, silicon carbide, hydroxyl silicone oil, zinc stearate, vinyl trimethoxy silane, hydrogen-containing silicone oil andalcohol modified chloroplatinic acid catalyst. According to the invention, by reasonably designing the combination of the raw materials and the use amount and proportion, the product has excellent heat conductivity and flame retardance. A preparation method of the silicone rubber has simple production process, the quality is easy to control, and the silicone rubber is non-toxic and odorless at a normal temperature, has excellent mechanical property, can be processed into various molded products, and is suitable for being produced on a large scale.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a silicone rubber for heat-conducting silicone skin and a preparation method thereof. Background technique [0002] As a heat-conducting medium, the heat-conducting silicone skin can fill the gap between the heat source and the heat dissipation device, and complete the heat transfer between the heat source and the heat dissipation device. It has excellent thermal conductivity, cushioning and extremely high resilience. It is suitable for the hot pressing bonding process of various types of display screens. It is placed on the bottom surface of the hot pressing head to make the temperature conduction more uniform, isolate the hot pressed product and the hot pressing head, and has the function of isolating and protecting against static electricity. [0003] At present, in the published Chinese patent documents, there are still few patents on heat-conducting silicone rubber specially...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08L83/06C08K13/02C08K3/36C08K3/04C08K3/34C08K5/098C08K5/5425
Inventor 贡玉圭瞿琼丽马汉喜
Owner GUANGDONG POLYSIL TECH CO LTD
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