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Method for manufacturing silicone rubber

A manufacturing method and technology of silicone rubber, applied in the manufacturing field of silicone rubber, can solve problems such as poor electromagnetic shielding ability of silicone rubber, and achieve the effects of reducing material consumption, simplifying production process, and reducing manufacturing and assembly costs

Inactive Publication Date: 2020-03-13
樊伟
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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 provide a method for producing silicone rubber, which solves the problem of poor electromagnetic shielding ability of silicone rubber produced in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix the silicone rubber matrix, cross-linking agent, conductive and magnetic medium on a double-roll mill for 0.5°C at a temperature of 90°C; mold the mixed composite material at 80°C and 9MPa, wherein the conductive The medium is silver-plated copper powder, and the magnetic medium is silver-plated nickel powder; the mass ratio of the silicone rubber matrix: crosslinking agent: conductive medium: magnetic medium is 4:1:100:80, and the silicone rubber matrix includes: hydroxyl Silicone rubber, vinyl silicone rubber, alkoxy silicone rubber, crosslinking agent includes: isocyanate, organic peroxide, aliphatic azo compound, silver-plated nickel powder particle size is 1μm, coating thickness is 1μm, silver-plated copper The particle size of the powder is 1 μm, and the coating thickness is 1 μm.

Embodiment 2

[0023] Mix the silicone rubber matrix, crosslinking agent, conductive and magnetic medium on a two-roll mill for 3 hours at a temperature of 150°C; mold the mixed composite material at 150°C and 20MPa, wherein the The conductive medium is silver-plated copper powder, and the magnetic medium is silver-plated nickel powder; the mass ratio of the silicone rubber matrix: crosslinking agent: conductive medium: magnetic medium is 4:10:400:200, and the silicone rubber matrix includes: Hydroxy silicone rubber, vinyl silicone rubber, alkoxy silicone rubber, crosslinking agent includes: isocyanate, organic peroxide, aliphatic azo compound, silver-plated nickel powder particle size is 6μm, coating thickness is 6μm, silver-plated The particle diameter of the copper powder was 12 μm, and the thickness of the plating layer was 7 μm.

Embodiment 3

[0025] Mix the silicone rubber matrix, crosslinking agent, conductive and magnetic medium on a two-roll mill for 1 hour at a temperature of 100°C; mold the mixed composite material at 130°C and 15MPa, wherein the The conductive medium is silver-plated copper powder, and the magnetic medium is silver-plated nickel powder; the mass ratio of the silicone rubber matrix: crosslinking agent: conductive medium: magnetic medium is 4:5:200:150, and the silicone rubber matrix includes: Hydroxy silicone rubber, vinyl silicone rubber, alkoxy silicone rubber, crosslinking agent includes: isocyanate, organic peroxide, aliphatic azo compound, silver-plated nickel powder particle size is 5μm, coating thickness is 4μm, silver-plated The particle diameter of the copper powder is 8 μm, and the thickness of the plating layer is 5 μm.

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Abstract

The invention discloses a method for manufacturing silicone rubber. The method comprises the following steps: step 1, mixing a silicone rubber matrix, a cross-linking agent and an electric conductivemedium and a magnetic conductive medium on a double-roll open mill for 1-2h at a temperature of 100-130 DEG C; and step 2, placing the mixed composite material in a flat vulcanizing machine for compression molding at a temperature of 90-170 DEG C under 6-18MPa, wherein the electric conductive medium is silver-plated copper powder, the magnetic medium is silver-plated nickel powder, and a mass ratio of the silicone rubber matrix to the cross-linking agent to the electric conductive medium to the magnetic conductive medium is 4:(1-10):(100-400):(80-200). The invention solves a problem of poor electromagnetic shielding capacity of a silicone rubber manufactured in the prior art.

Description

technical field [0001] The invention belongs to the technical field of processing and molding of silicone rubber, and relates to a method for manufacturing silicone rubber. Background technique [0002] Silicone rubber refers to the rubber whose main chain is composed of silicon and oxygen atoms alternately, and there are usually two organic groups attached to the silicon atoms. Ordinary silicone rubber is mainly composed of silicone chains containing methyl groups and a small amount of vinyl groups. The introduction of phenyl can improve the high and low temperature resistance of silicone rubber, and the introduction of trifluoropropyl and cyano can improve the temperature and oil resistance of silicone rubber. Silicone rubber has good low temperature resistance, and generally can still work at -55°C. After introducing phenyl, it can reach -73°C. The heat resistance of silicone rubber is also outstanding. It can work for a long time at 180 °C, and it can withstand a few ...

Claims

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Application Information

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IPC IPC(8): B29B7/00B29C43/58B29K83/00
CPCB29B7/007B29C43/58B29C2043/5808B29C2043/5816B29K2083/00
Inventor 樊伟
Owner 樊伟
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