High-performance silicon-based conductive rubber and preparation method thereof

A conductive rubber, high-performance technology, applied in the field of high-performance silicon-based conductive rubber and its preparation, can solve the problems of low conductivity and easy aging, achieve good oxidation resistance and high and low temperature resistance, easy processing and molding, excellent The effect of electrical insulation

Active Publication Date: 2011-11-23
江苏晶河电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the conductive materials on the market use carbon black as the conductive medium. The polymer base materials mainly use natural rubber, EPDM rubber, butyl rubber, etc., but they have the disadvantages of low conductivity and easy aging.

Method used

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  • High-performance silicon-based conductive rubber and preparation method thereof
  • High-performance silicon-based conductive rubber and preparation method thereof

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] A method for preparing high-performance silicon-based conductive rubber includes the following steps:

[0047] (I) Drying of conductive powder

[0048] Bake the conductive powder in a blast drying oven for 60 to 80 hours to remove moisture;

[0049] (Ⅱ) The particle size of conductive powder is extremely matched

[0050] The particle size of the conductive powder is extremely matched, and the larger and smaller conductive powders are taken according to the weight ratio of 10:1, and premixed in a mixer to make the two conductive powders with different particle sizes preliminary mixing;

[0051] (Ⅲ) Conductive powder coating

[0052] Surface treatment of the powder obtained in step (ii) using a wet method to obtain a conductive powder coated with a layer of silane coupling agent;

[0053] (Ⅳ) Mixed

[0054] The conductive powder obtained in step (iii) is mixed with silicone rubber, flame retardant, vulcanizing agent, etc. in an internal mixer for 10-20 minutes to ...

Embodiment 1～3

[0056] (1) Prepare raw materials

[0057] a Silicone rubber

[0058] Among them: a1 methyl silicone rubber

[0059] a2 Methyl vinyl silicone rubber

[0060] a3. Methyl phenyl vinyl silicone rubber

[0061] a4. Methyl vinyl trifluoropropyl silicone rubber

[0062] b Silane coupling agent A-172

[0063] c Curing agent

[0064] Among them: c1 DCBP c2 DCP c3 DBPMH

[0065] d Flame retardant

[0066] Among them: d1 magnesium hydroxide d2 aluminum hydroxide

[0067] e Conductive powder

[0068] Among them: e1 pure silver conductive powder (average particle size 35μm)

[0069] e2 Silver-coated aluminum conductive powder (average particle size 70μm)

[0070] e3 Silver-coated copper conductive powder (average particle size 70μm)

[0071] The above-mentioned powders were polarized according to the ratio shown in Table 1, and then the surface of the polarized powders was...

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Abstract

The invention discloses a high-performance silicon-based conductive rubber and a preparation method thereof. The conductive rubber is mainly composed of silicon rubber, silane coupling agent, vulcanizing agent, fire retardant and conductive powder, wherein the conductive powder is mixture of powder with different particle diameters, and the silane coupling agent covers the conductive powder. The high-performance silicon-based conductive rubber has the advantages of excellent electrical characteristic and physical property, excellent conductive property, aging resistance high and low temperature resistance, stable resistance time characteristic, controllable resistance temperature coefficient, higher temperature limitation and the like. The high-performance silicon-based conductive rubber is mainly used for military shelters and military electronic equipment in the fields of aviation, aerospace, ships and the like, as well as electronic products, telecommunication equipment, high-frequency control equipment and other occasions which requiring a very wide watertight, airtight or frequency range and needing excellent shielding performance.

Description

Technical field [0001] The invention belongs to an organic conductive material with electromagnetic shielding interface requirements, and specifically relates to a high-performance silicon-based conductive rubber and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of science and technology and the electronics industry, various digital and high-frequency electronic and electrical equipment radiate a large number of electromagnetic waves of different wavelengths and frequencies into space when they are working, resulting in new environmental pollution—electromagnetic wave interference And radio frequency interference. At the same time, electronic components are also developing in the direction of miniaturization, light weight, digitization and high-density integration. The sensitivity is getting higher and higher, and they are susceptible to misoperation, image barriers, and sound barriers due to external electromagnetic inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07C08L83/08C08K13/06C08K9/10C08K9/06H01B1/20
Inventor 杨福河
Owner 江苏晶河电子科技有限公司
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