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Novel electromagnetic shielding paint for surface of silicone rubber

An electromagnetic shielding paint, silicone rubber technology, applied in conductive paints, coatings, etc., can solve problems such as edge warping and twisting

Inactive Publication Date: 2012-01-25
中化化工科学技术研究总院有限公司
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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 new type of electromagnetic shielding paint suitable for the surface of silicone rubber and its preparation method. The main technical problem to be solved is that most of the existing electromagnetic shielding gaskets are hard, and it is easy to apply to plastic casings. Cause problems such as edge warping and twisting, thereby providing an electromagnetic shielding coating suitable for use on the surface of silicone rubber; coating the prepared electromagnetic shielding coating on the surface of silicone rubber to obtain an electromagnetic shielding sealing material, the cost of which is relatively low , the conductive effect is good, and the thickness of the coating is usually 50 μm, which can achieve a good electromagnetic shielding effect; on the other hand, the elasticity and compression set resistance of silicone rubber will not be affected after coating the electromagnetic shielding coating

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The technological process and process parameters of the present embodiment are as follows:

[0036] ingredients

[0037] Film-forming resin 23.7%

[0038] Curing agent 2.4%

[0039] Conductive filler 39.4%

[0040] Coupling agent 0.4%

[0041] Anti-settling agent 0.4%

[0042] Catalyst 0.2%

[0043] Solvent 33.5%

[0044] 1. The film-forming resin is polyurethane modified silicone resin, and the curing agent is isocyanate, hydrosilane and acyloxysilane.

[0045] 2. Preparation of anti-sedimentation agent solution

[0046] The anti-sedimentation agent is polyamide wax, the solvent is xylene, the ratio of polyamide wax to xylene is 5%:95%, the two are mixed evenly at normal temperature, and fully stirred.

[0047] 3. Preparation of coupling agent solution

[0048] The coupling agent is a titanate coupling agent, the solvent is a mixed solvent of n-butanol and xylene, and the ratio of the coupling agent to the solvent is 6.5%:93.5%. Mix the two evenly at room tem...

Embodiment 2

[0058] The technological process and process parameters of the present embodiment are as follows:

[0059] ingredients

[0060] Film-forming resin 21.5%

[0061] Curing agent 2.4%

[0062] Conductive filler 39.4%

[0063] Coupling agent 0.4%

[0064] Anti-settling agent 0.4%

[0065] Catalyst 2.4%

[0066]Solvent 33.5%

[0067] 1. The film-forming resin is a silicone resin, and the curing agent is an alkoxysilane and a hydrosilane.

[0068] 2. Preparation of anti-sedimentation agent solution

[0069] The anti-sedimentation agent is polyamide wax, the solvent is xylene, the ratio of polyamide wax to xylene is 5%:95%, the two are mixed evenly at normal temperature, and fully stirred.

[0070] 3. Preparation of coupling agent solution

[0071] The coupling agent is a titanate coupling agent, the solvent is a mixed solvent of n-butanol and xylene, and the ratio of the coupling agent to the solvent is 6.5%:93.5%. Mix the two evenly at room temperature and stir well.

[0...

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Abstract

The invention relates to an electromagnetic shielding paint for the surface of a silicone rubber and a preparation method thereof. The electromagnetic shielding paint for the surface of the silicone rubber comprises a solute part and a solvent part, and the solute part comprises the following components: 15-27% of a film forming resin, 1-6% of a curing agent, 40-65% of a conductive filler, 0.2-0.6% of a coupling agent, 0.2-0.6% of an anti-settling agent, and 0.5-6% of a catalyst. The electromagnetic shielding paint of the invention has a very excellent adhesion effect on the surface of the silicone rubber, so the preparative conductive silicone rubber has a good electromagnetic shielding performance.

Description

Technical field: [0001] The invention relates to the field of electromagnetic shielding coatings, in particular to a novel electromagnetic shielding coating suitable for the surface of silicone rubber prepared by using modified silicone resin as a binder and adding conductive fillers. Background technique: [0002] In recent years, with the rapid development of science and technology and the electronic industry, various digital and high-frequency electronic and electrical equipment radiate a large number of electromagnetic waves of different wavelengths and frequencies into the space during work, resulting in new environmental pollution-electromagnetic interference ( Electromagnetic Interference (EMI) and radio-frequency interference (Radio-Frequency Interference, RFI) have brought serious consequences to families, businesses, especially the military, and have become one of the social hazards that countries around the world pay attention to. [0003] One of the effective mea...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D5/24
Inventor 刘俊杰李秀玲杨帅赵姝胤
Owner 中化化工科学技术研究总院有限公司
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