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Electrically-conductive silicone rubber and preparation method thereof

A conductive silicone and silicone rubber technology, applied in the field of conductive silicone rubber and its preparation, can solve the problems of unreasonable production method of conductive silicone rubber formula, low hardness, small volume resistivity of conductive silicone rubber, etc., and achieve low density and mechanical properties The effect of good and good physical properties

Inactive Publication Date: 2017-11-28
JIANGSU TIANCHEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conductive silicone rubber has the characteristics of small volume resistivity, low hardness, high and low temperature resistance, aging resistance, and good molding processability. It has been widely used in various fields such as aviation, aerospace, electronics, computers, construction, medical, food, etc. , the selection of conductive fillers has decisive significance for the design and manufacture of conductive silicone rubber. It is imperative to develop new conductive fillers with good electrical conductivity and low cost. However, the existing conductive silicone rubber formulations and production methods Extremely unreasonable, which greatly limits the scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the conductive silicone rubber of the present embodiment may further comprise the steps:

[0022] A. Add 100 parts of 30-degree methyl vinyl silicone rubber compound into the kneader and knead until it softens;

[0023] B. Add 1 part of carbon nanotubes, 0.3 part of hydroxy silicone oil and 0.5 part of vinyltrimethoxysiloxane to a kneader in batches and knead evenly;

[0024] C, 1 part of graphene and 0.2 part of hydroxy silicone oil and vinyl trimethoxysiloxane are added to the kneader in batches and mixed evenly;

[0025] D. Heat up to 140°C and knead for 1 hour, then cool to release the glue.

[0026] In addition, in the present embodiment, the methyl vinyl compound rubber is a gas-phase rubber with a Shore hardness of 30 degrees, and the carbon nanotubes are single-wall or multi-wall carbon nanotubes with a diameter of <50 nm and a length of 5 μm. , said graphene is thermally reduced single-layer or multi-layer graphene, with a thickness ...

Embodiment 2

[0028] The preparation method of the conductive silicone rubber of the present embodiment may further comprise the steps:

[0029] A. Add 100 parts of 40-degree rubber compound into the kneader and knead until it softens.

[0030] B. Add 7 parts of carbon nanotubes, 1.5 parts of hydroxyl silicone oil and 1.5 parts of vinyltrimethoxysiloxane into a kneader in batches and knead evenly.

[0031] C. Add 3 parts of graphene, 0.5 part of hydroxy silicone oil and 0.5 part of vinyltrimethoxysiloxane into a kneader in batches and knead evenly.

[0032] D. The above-mentioned rubber materials were mixed at 150°C for 1.5 hours and then cooled to release the rubber.

[0033] Add 0.7% bis-2-penta vulcanizing agent to the mill, and vulcanize at 170 degrees Celsius for 10 minutes.

[0034] In this example, the obtained material has been tested and found to have a hardness of 55A and a density of 1.24g / cm 3 , volume resistivity 15 Ώ.m, tensile strength 8.0MPa, elongation 400%, tear strengt...

Embodiment 3

[0036] The preparation method of the conductive silicone rubber of the present embodiment may further comprise the steps:

[0037] A. Add 100 parts of 50-degree methyl vinyl silicone rubber compound into the kneader and knead until it softens;

[0038] B. Add 10 parts of carbon nanotubes, 1.5 parts of hydroxy silicone oil and 3 parts of vinyltrimethoxysiloxane into a kneader in batches and knead evenly;

[0039] C, 5 parts of graphene and 1.5 parts of hydroxy silicone oil and vinyl trimethoxysiloxane are added to the kneader in batches and mixed evenly;

[0040] D. Heat up to 150°C and knead for 2 hours, then cool to release the glue.

[0041] In addition, in the present embodiment, the methyl vinyl compound rubber is a gas-phase rubber with a Shore hardness of 50 degrees, and the carbon nanotubes are single-wall or multi-wall carbon nanotubes with a diameter of <50 nm and a length of 40 μm. , said graphene is thermally reduced monolayer or multilayer graphene, with a thickn...

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Abstract

The invention discloses a high-temperature vulcanized silicone rubber production technology, and concretely relates to an electrically-conductive silicone rubber and a preparation method thereof. The electrically-conductive silicone rubber comprises, by weight, 100 parts of methyl vinyl silicone rubber mixed rubber, 1-10 parts of carbon nanotubes, 1-5 parts of graphene, 0.5-3 parts of vinyltrimethoxysilane and 0.5-3 parts of hydroxyl silicone oil. The carbon nanotubes and the graphene are compounded as an electrically-conductive filler, all the components are reasonably matched, the special preparation method is adopted, and all parameters are strictly controlled in the preparation process, so electric performance requirements are met, and the electrically-conductive silicone rubber also has the advantages of low density, good physical performances and especially good mechanical performances.

Description

technical field [0001] The invention relates to a production technology of high-temperature vulcanized silicone rubber, in particular to a conductive silicone rubber and a preparation method thereof. Background technique [0002] Conductive silicone rubber has the characteristics of small volume resistivity, low hardness, high and low temperature resistance, aging resistance, and good molding processability. It has been widely used in various fields such as aviation, aerospace, electronics, computers, construction, medical, food, etc. , the selection of conductive fillers has decisive significance for the design and manufacture of conductive silicone rubber. It is imperative to develop new conductive fillers with good electrical conductivity and low cost. However, the existing conductive silicone rubber formulations and production methods Extremely unreasonable, thus making the scope of application subject to great limitations. Contents of the invention [0003] The techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/06C08K7/24C08K3/04C08K5/5425
CPCC08L83/04C08K2201/001C08K2201/003C08K2201/004C08K2201/011C08L2205/02C08L83/06C08K7/24C08K3/04C08K5/5425
Inventor 宋顺刚王睿
Owner JIANGSU TIANCHEN NEW MATERIALS
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