Anti-tear high-toughness conducting rubber and preparation method thereof

A conductive rubber and flexibility technology, applied in the field of tear-resistant high-flexibility conductive rubber and its preparation, can solve the problems of low tear strength and tear strength, reduced electrical continuity and sealing, and high hardness of conductive rubber. , to achieve the effect of improving tear strength and breaking strength, reducing density and speeding up extrusion molding speed

Active Publication Date: 2018-09-14
NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common conductive rubber is mainly composed of silicone rubber base, conductive powder and vulcanizing agent. In order to ensure electrical continuity, a large amount of conductive powder is added to the rubber material. The conductive rubber after molding has high hardness, lack of flexibility, and low tear strength. and tear strength are low, and when the fastening force is large in engineering applications, tearing and tearing often occur, resulting in reduced electrical continuity and sealing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of tear-resistant high-flexibility conductive rubber, comprising the following steps:

[0031] S1. Put 100 parts of silicone rubber and 0.62 parts of hydroxy silicone oil in an internal mixer and mix for 30 minutes at a temperature of 55-65°C;

[0032] S2. Put 208 parts of aluminum silver-plated powder, 0.52 parts of metal purifying agent, 0.48 parts of coupling agent, 1.9 parts of vulcanizing agent and 0.18-0.24 parts of graphene in an open mill and knead at a temperature of 15-25°C for 15 minutes. Capacity less than 10Kg;

[0033] S3, place the silicone rubber and hydroxy silicone oil mixed in S1 with the aluminum silver-plated powder, metal purifying agent, coupling agent, vulcanizing agent and graphene body after mixing in S2 to be extruded by the extruder, and the extruder enters The barrel temperature is 10-25°C, and the extrusion speed is 80m / h;

[0034] S4. Enter the rubber material extruded in S3 into the vulcanization channel for vulcani...

Embodiment 2

[0038] S1. Put 100 parts of silicone rubber and 0.56 parts of hydroxy silicone oil in an internal mixer and mix for 30 minutes at a temperature of 55-65°C;

[0039] S2. Put 198 parts of aluminum silver-plated powder, 0.45 parts of metal purifying agent, 0.42 parts of coupling agent, 2 parts of vulcanizing agent and 0.42-0.48 parts of dendritic zinc powder in an open mill and knead at a temperature of 15-25 ° C for 15 minutes, and start The capacity of the refining machine is less than 10Kg;

[0040] S3, place the silicone rubber and hydroxy silicone oil mixed in S1 with the aluminum silver-plated powder, metal purifying agent, coupling agent, vulcanizing agent and dendritic zinc powder mixed in S2 to extrude in an extruder, and the extruder The temperature of the feeding cylinder is 10-25°C, and the extrusion speed is 90m / h;

[0041] S4. Enter the rubber material extruded in S3 into the vulcanization channel for vulcanization and setting, and the vulcanization and setting tem...

Embodiment 3

[0045] S1. Put 100 parts of silicone rubber and 0.5 parts of hydroxy silicone oil in an internal mixer for mixing at a temperature of 55-65°C for 30 minutes;

[0046] S2. Put 195 parts of aluminum silver-plated powder, 0.4 parts of metal purifying agent, 0.4 parts of coupling agent, 1.93 parts of vulcanizing agent and 0.4-0.5 parts of carbon nanotubes in an open mill and knead at a temperature of 15-25 ° C for 15 minutes, and start kneading The machine capacity is less than 10Kg;

[0047] S3, place the silicone rubber and hydroxy silicone oil mixed in S1 with the aluminum silver-plated powder, metal purifying agent, coupling agent, vulcanizing agent and carbon nanotubes mixed in S2 to extrude in an extruder, and the extruder enters The barrel temperature is 10-25°C, and the extrusion speed is 60m / h;

[0048] S4. Enter the rubber material extruded in S3 into the vulcanization channel for vulcanization and setting, and the vulcanization and setting temperature is 140-180°C;

...

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Abstract

The invention relates to the technical field of preparation and rubber, in particular to anti-tear high-toughness conducting rubber and a preparation method thereof. The preparation method comprises the following steps: adding an appropriate amount of conventional conducting powder into a rubber matrix, further adding 0.1 to 0.5 percent of ultrafine powder, performing the banburying and open smelting step by step by adopting a rubber mixing machine according to the technological requirement, mixing silicone rubber and hydroxyl oil by virtue of a mixing machine, adding the conducting powder, ametal passivation agent and a vulcanization catalyst into an open smelting machine, uniformly mixing, extruding, and vulcanizing. The electric performance and mechanical performance of the conductingrubber are improved, the volume density of the conducting rubber is reduced, the tear strength and breaking strength are improved, and the toughness is improved. By adding the ultrafine powder, the weight ratio of the conventional conducting powder is reduced, a lubricating effect is realized, the extruding forming speed is increased, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of rubber preparation, and more specifically relates to a tear-resistant high-flexibility conductive rubber and a preparation method thereof. Background technique [0002] Conductive rubber is to uniformly distribute conductive particles such as glass silver plating, aluminum silver plating, and silver in silicone rubber, and make the conductive particles contact through pressure to achieve good electrical conductivity. There are military and commercial applications. Its main function is sealing and electromagnetic shielding. When the conductive particles filled in the conductive rubber are filled with a certain volume fraction, they contact each other to form a continuous state of electrons. When the external electromagnetic field reaches the outside of the conductive rubber, strong electromagnetic waves hit the free electrons of the conductive particles, and the free electrons move freely. During the mov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K3/08C08K7/06C08K3/04
CPCC08K2003/0806C08K2003/0812C08K2201/001C08K2201/011C08L83/04C08L2205/025C08K3/042C08K3/08C08K3/041C08K3/04C08K7/06
Inventor 任圣平乔秒杰王晓明李彦奎马富花王金红王胜利
Owner NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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