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Electroconductive rubber composition

A silicone rubber composition and conductivity technology, applied in the direction of carbon-silicon compound conductors, etc., can solve the problems of fluctuation in physical properties, difficult to mix rubber, damage to the cold resistance and physical properties of silicone rubber, and achieve less sheet adhesion and electrical conductivity. Excellent performance and good processability

Active Publication Date: 2011-10-26
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the former uses organosilicon compounds containing phenyl groups, which impairs the original cold resistance and physical properties of silicone rubber, and has the problem of fluctuations in physical properties due to differences in kneading methods.
In addition, the shrinkage of the latter at the time of molding is several percent or more, and it cannot be said that it is a technology capable of withstanding practical use.
[0005] In addition, carbon black that is different from conductive carbon black is usually compounded in silicone rubber, but their structure is extremely developed. When compounded with silicone rubber, it is difficult to compound rubber (rubber compound), and the separation characteristics in the calender , Sheeting, roll adhesion, and adhesion to polyethylene sheets during storage of the mixed rubber have many disadvantages

Method used

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  • Electroconductive rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Containing 99.825 mol% of dimethyl siloxane units and 0.15 mol% of methyl vinyl siloxane units, both ends of the molecular chain are capped with 0.025 mol% of dimethyl vinyl silyl groups, and the average degree of polymerization is 8000 In 100 parts of organopolysiloxane, add BET specific surface area 65m 2 60 parts of carbon black A (manufactured by TIMCAL (KK), trade name "ENSACO 250G"), DBP oil absorption 190ml / 100g, degree of graphitization d(002) of 0.347nm was placed in a kneader as carbon black, and carried out After kneading, 0.5 part of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane as a cross-linking agent was charged and uniformly mixed to obtain a silicone rubber composition.

Embodiment 2

[0068] In addition to adding 50 parts of carbon black A (manufactured by TIMCAL Co., Ltd., trade name "ENSACO 250G") and BET specific surface area of ​​69m 2 / g, DBP oil absorption 125ml / 100g, graphitization degree d (002) is 0.342nm acetylene carbon black C (Denki Kagaku Kogyo Co., Ltd. product, trade name denka black granular product) 10 parts as carbon black, add and mix Except that, a silicone rubber composition was obtained in the same manner as in Example 1.

Embodiment 3

[0070] Except that 10 parts of carbon black A (manufactured by TIMCAL Co., Ltd., trade name "ENSACO 250G") and 50 parts of acetylene carbon black C (manufactured by Denki Kagaku Kogyo Co., Ltd., trade name denka black granular product) were prepared at this ratio and used as Except for carbon black, a silicone rubber composition was obtained in the same manner as in Example 1.

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Abstract

The aim of the invention is to provide a silastic composition which has excellent processability and excellent conductivity. The conductive silastic composition is characterized in that the composition is obtained by mixing organopolysiloxzane base polymer, solidifying agent and black pigment, as black carbon, the BET specific surface area is 50-200m<2> / g, DBP oil absorption volume is 120-280ml / 100g, and the graphite interlaminar distance representing the graphitizing degree is 0.346-0.349.

Description

technical field [0001] The present invention relates to a conductive silicone rubber composition having excellent processability and high electrical conductivity. Background technique [0002] Hitherto, silicone rubber compositions that cure to silicone rubber are well known, and are widely used in packaging materials and coatings for electrical and electronic parts due to their excellent properties such as weather resistance, heat resistance, cold resistance, and electrical insulation. Cloth materials, molding materials such as molding materials, etc. In addition, it has also been used to impart conductivity to a silicone rubber composition which is originally an insulating material. [0003] As a method for imparting conductivity to the silicone rubber composition, a method of compounding conductive carbon black is often used. For example, it is described in JP-A-54-139659 (Patent Document 1) that there will be a 40-100m 2 A conductive organopolysiloxane elastomer that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08K3/04
CPCC08K3/04C08K2201/006C08L83/04C08L2201/00H01B1/04
Inventor 平林佐太央高桥政晴井出今朝男清水秀明
Owner SHIN ETSU CHEM IND CO LTD
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