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A kind of conductive silicone rubber with low tensile set and preparation method thereof

A permanent deformation, conductive silicon technology, applied in the field of conductive silicone rubber, it can solve the problems of not meeting the needs of high-end cable T-head accessories, high resistance and poor conductivity of conductive silicone rubber materials, to improve mold opening performance and improve vulcanization. conditions, the effect of improving electrical performance

Active Publication Date: 2022-04-01
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention adopts the method of pretreating carbon black, the process is complicated, and the conductive silicone rubber material obtained has a large resistance, a volume resistivity of 0.55Ω·m, and poor conductivity, which cannot meet the requirements of domestic and foreign high-end cable T-head accessories. Usage requirements

Method used

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  • A kind of conductive silicone rubber with low tensile set and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment provides a conductive silicone rubber with low tensile set, which consists of the following components in parts by mass:

[0041] Methyl vinyl silicone rubber raw rubber 95 parts

[0042] 5 parts of raw methyl silicone rubber

[0043] White carbon black 15 parts

[0044] Acetylene carbon black 35 parts

[0045] Silane coupling agent 2 parts

[0046] Hydroxy silicone oil 5 parts

[0047] 2 parts methyl silicone oil

[0048] 4 parts hydrogen silicone oil

[0049] Vulcanizing agent 1 part

[0050] 1 part zinc stearate

[0051] In the composition of this embodiment, the methyl vinyl silicone rubber raw rubber consists of 50 parts of methyl vinyl silicone rubber raw rubber A, 43 parts of methyl vinyl silicone rubber raw rubber B, 2 parts of methyl vinyl silicone rubber raw rubber C mixed;

[0052] Further, the molecular weight of methyl vinyl silicone rubber raw rubber A is 600,000, and the molar content of vinyl is 0.05%; the molecular weight of methy...

Embodiment 2

[0062] This embodiment provides a conductive silicone rubber with low tensile set, which consists of the following components in parts by mass:

[0063] Methyl vinyl silicone rubber raw rubber 95 parts

[0064] 5 parts of raw methyl silicone rubber

[0065] White carbon black 13 parts

[0066] Acetylene carbon black 40 parts

[0067] Silane coupling agent 2 parts

[0068] Hydroxy silicone oil 6 parts

[0069] 1 part methyl silicone oil

[0070] 1.5 parts of hydrogen silicone oil

[0071] Vulcanizing agent 1 part

[0072] 1 part zinc stearate

[0073] In the composition of this embodiment, the methyl vinyl silicone rubber raw rubber consists of 40 parts of methyl vinyl silicone rubber raw rubber A, 54 parts of methyl vinyl silicone rubber raw rubber B, and 1 part of methyl vinyl silicone rubber raw rubber C mixed;

[0074] Further, the molecular weight of methyl vinyl silicone rubber raw rubber A is 700,000, and the molar content of vinyl is 0.03%; the molecular weight...

Embodiment 3

[0085] This embodiment provides a conductive silicone rubber with low tensile set, which consists of the following components in parts by mass:

[0086] Methyl vinyl silicone rubber raw rubber 95 parts

[0087] 5 parts of raw methyl silicone rubber

[0088] White carbon black 20 parts

[0089] Acetylene carbon black 40 parts

[0090] 3 parts of silane coupling agent

[0091] Hydroxy silicone oil 8 parts

[0092] 2 parts methyl silicone oil

[0093] 3 parts hydrogen silicone oil

[0094] Vulcanizing agent 1 part

[0095] Zinc stearate 0.5 parts

[0096] In the composition of this embodiment, the methyl vinyl silicone rubber raw rubber consists of 10 parts of methyl vinyl silicone rubber raw rubber A, 84.5 parts of methyl vinyl silicone rubber raw rubber B, and 0.5 parts of methyl vinyl silicone rubber raw rubber C mixed;

[0097] Further, the molecular weight of methyl vinyl silicone rubber raw rubber A is 650,000, and the molar content of vinyl is 0.04%; the molecular...

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Abstract

The invention discloses a conductive silicone rubber with low tensile permanent deformation and a preparation method thereof. agent, hydroxyl silicone oil, methyl silicone oil, hydrogen-containing silicone oil, vulcanizing agent, zinc stearate; the preparation steps include: putting the raw materials into a kneader to obtain a mixing base rubber; adding acetylene carbon black after the mixing base rubber is cooled , methyl silicone oil, methyl silicone rubber raw rubber, heat up and stir to release the rubber material; after the rubber material is left to cool, add a vulcanizing agent on the double roller; mold the conductive silicone rubber containing the vulcanizing agent and carry out secondary Vulcanized products. The conductive silicone rubber of the present invention has good processability and conductivity, does not stick to the mold, and can still maintain low tensile permanent deformation under the condition of excellent electrical properties with a resistivity ≤ 30Ω·cm; at the same time, the preparation process of the present invention is simple, Easy to mold, easy to realize industrial production.

Description

technical field [0001] The invention relates to the technical field of conductive silicone rubber, in particular to a high-temperature vulcanized conductive silicone rubber material with low tensile permanent deformation and a preparation method thereof. Background technique [0002] Silicone rubber is based on (—Si—O—) n The main chain is a high molecular polymer composed of organic groups as side groups. It has excellent heat resistance, low temperature resistance, weather resistance, UV resistance and biological characteristics. Due to the high flexibility of silicone rubber molecular chains and weak interaction between molecular chains, the vulcanized silicone rubber is soft and elastic, and because it does not contain softeners, plasticizers, anti-aging agents, etc. Pollution, so it is very suitable as an electronic component material. [0003] The current conductive silicone rubber is basically filled with conductive additives (metal powder, acetylene carbon black, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/04C08L83/05C08K13/02C08K3/36C08K3/04C08K5/098
CPCC08L83/04C08L2205/035C08L2205/025C08K2201/006C08K2201/001C08K13/02C08K3/36C08K3/04C08K5/098
Inventor 王俊和曾莹李龙锐周远建
Owner CHINA BLUESTAR CHENGRAND CO LTD
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