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
6 Cites 0 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for producing silicone rubber, which ...
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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.

Technology Topic

Electrically conductivePolymer chemistry +7

Examples

  • Experimental program(4)

Example Embodiment

[0020] Example 1
[0021] The silicone rubber matrix, cross-linking agent, conductive and magnetic conductive media were mixed 0.5 on a two-roll mill at a temperature of 90°C; the mixed composite material was molded at 80°C and 9MPa. Among them, the conductive The medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the mass ratio of the silicone rubber matrix: crosslinking agent: conductive medium: magnetic conductive 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 thickness of the coating is 1 μm.

Example Embodiment

[0022] Example 2
[0023] The silicone rubber matrix, crosslinking agent, conductive and magnetic medium were mixed on a two-roll mill for 3 hours at a temperature of 150°C; the mixed composite material was molded under the conditions of 150°C and 20MPa, wherein the The conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the mass ratio of the silicone rubber matrix: crosslinking agent: conductive medium: magnetic conductive 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, the particle size of silver-plated nickel powder is 6μm, the thickness of the coating is 6μm, silver-plated The particle size of the copper powder is 12 μm, and the plating thickness is 7 μm.

Example Embodiment

[0024] Example 3
[0025] The silicone rubber matrix, cross-linking agent, conductive and magnetic conductive media were mixed on a two-roll mill for 1 hour at a temperature of 100°C; the mixed composite material was compression molded at 130°C and 15MPa. The conductive medium is silver-plated copper powder, and the magnetic conductive medium is silver-plated nickel powder; the mass ratio of the silicone rubber matrix: crosslinking agent: conductive medium: magnetic conductive medium is 4:5:200:150, and the silicone rubber matrix includes: Hydroxy silicone rubber, vinyl silicone rubber, alkoxy silicone rubber, cross-linking agent includes: isocyanate, organic peroxide, aliphatic azo compound, the particle size of silver-plated nickel powder is 5μm, the coating thickness is 4μm, silver-plated The particle size of the copper powder is 8 μm, and the plating thickness is 5 μm.

PUM

PropertyMeasurementUnit
Particle size1.0 ~ 6.0µm
Coating thickness1.0 ~ 6.0µm
Particle size1.0 ~ 12.0µm

Description & Claims & Application Information

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