Moisture-proof and salt-mist corrosion-resistant conductive rubber and preparation method thereof

A technology of conductive rubber and salt spray resistance, which is applied to the preparation of the conductive rubber. The conductive rubber with salt spray corrosion resistance has the field of moisture resistance, and can solve the problem of reducing the shielding efficiency of conductive rubber, poor contact of conductive powder, and reduced electromagnetic shielding function. and other problems, to achieve the effect of improving the anti-salt spray corrosion performance, improving the anti-salt spray corrosion performance, and compact structure

Active Publication Date: 2015-07-01
SHANXI ZHONGDIAN TECH SPECIAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing aluminum silver-plated conductive rubber still has the following defects: 1) It is easy to absorb moisture and expand in a humid environment, resulting in poor contact of the conductive powder, thereby reducing the shielding effectiveness of the conductive rubber; There will be obvious chemical corrosion, which will lead to a decrease in conductivity and a decrease in electromagnetic shielding function; 3) Resilience becomes poor in a high temperature environment, thereby affecting sealing; 4) Slag is easy to drop during cutting and vibration, resulting in short circuit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 1g of KH-550, 1g of KH-560 and 0.5g of S-3046, mix them, and evenly disperse them in 500mL of 95% ethanol aqueous solution to make a coupling agent solution. Add 500 g of silver-plated aluminum conductive powder to the solution, stir for 0.5 hour, and vacuum dry at 0.09 MPa and 95° C. for 2 hours to obtain a conductive powder coated with a composite coupling agent.

[0022] Add 170g of methyl vinyl kneading silicone rubber to the rollers of the open double-roller rubber mixing machine, add 500g of conductive powder coated with a composite coupling agent after wrapping, knead for 30 minutes, thin pass 10 times, add 3.5g vulcanizing agent Shuangerwu, and then mix Botong 10 times. The mixed material is rolled down and the sheet is unloaded, vulcanized on a flat vulcanizing machine at 15MPa, 170°C for 15 minutes, and vulcanized in an oven at 200°C for 240 minutes, and molded to form a conductive rubber.

[0023] The properties of the prepared conductive rubber were te...

Embodiment 2

[0031] Take 3g of KH-550, 3g of KH-560, and 2.5g of S-3046, mix them, and evenly disperse them in 500mL of 95% ethanol aqueous solution to make a coupling agent solution. Add 500 g of silver-plated aluminum conductive powder to the solution, stir for 0.5 hour, and vacuum dry at 0.09 MPa and 95° C. for 2 hours to obtain a conductive powder coated with a composite coupling agent.

[0032] Add 153g of methyl vinyl kneading silicone rubber to the rollers of the open double-roller rubber mill, and add 452g of conductive powder coated with a composite coupling agent after wrapping the rolls. After mixing for 30 minutes, divide the above mixture into The two parts were mixed separately and thin-passed 10 times respectively. One part was added with 2.5g of platinum vulcanizing agent component A, and the other was added with 1g of platinum vulcanizing agent component B, and then mixed separately for 10 times.

[0033] The two parts are kneaded together, the kneaded material is rolled d...

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Abstract

The invention discloses moisture-proof and salt-mist corrosion-resistant conductive rubber. The moisture-proof and salt-mist corrosion-resistant conductive rubber is prepared from 100 parts of kneaded silicone rubber, 285-310 parts of silver-plated aluminum conductive powder, 1.2-9 parts of composite coupling agent and 1.5-3 parts of vulcanizing agent. The conductive rubber prepared by a preparation method disclosed by the invention has he advantages of significantly improving moisture proofness and resistance to salt-mist corrosion, increasing the density of materials, improving mechanical properties and electromagnetic shielding performance of the conductive rubber and solving the slag falling defect of the conductive powder.

Description

technical field [0001] The invention relates to a conductive rubber used for sealing and electromagnetic shielding, in particular to a conductive rubber with moisture-proof and salt spray corrosion resistance, and a preparation method of the conductive rubber. Background technique [0002] Conductive rubber is mainly composed of conductive powder and silicone rubber substrate, which has two functions of electromagnetic shielding and water vapor sealing. There are many kinds of conductive powder materials, among which pure silver powder has good conductivity, but the cost is high. The conductivity of aluminum silver-plated powder is second only to that of pure silver powder, but it has high cost performance and wide applicability. It is the most widely used and used conductive powder material. It is widely used in special electronic equipment such as chassis, cabinets, and shelters. [0003] The existing aluminum silver-plated conductive rubber still has the following defect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K13/06C08K9/06C08K3/08
Inventor 任圣平王东红李彦奎马富花桂亚强王永飞
Owner SHANXI ZHONGDIAN TECH SPECIAL EQUIP CO LTD
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