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Temperature-resistant silicone-rubber-mixed rubber sealing ring

A technology of silicone rubber and compounding rubber, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of poor ozone resistance and electrical insulation performance of nitrile rubber, reduced elasticity and cold resistance, and achieve high temperature resistance. Excellent low temperature performance, high tensile strength and simple preparation method

Inactive Publication Date: 2012-10-17
CGP WUHU SEALING
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The performance of nitrile rubber is affected by the content of acrylonitrile. As the content of acrylonitrile increases, the tensile strength, heat resistance, oil resistance, air tightness and hardness increase, but the elasticity and cold resistance decrease.
Nitrile rubber has poor ozone resistance and electrical insulation properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] A heat-resistant silicone rubber compound seal ring, which is made of the following raw materials in parts by weight:

[0014] Silicone rubber 65, nitrile rubber 33, sulfur powder 2, quick press black 5, diatomite 4, hard kaolin 3, nano clay 30, chlorinated paraffin 35, naphthenic oil 10, microcrystalline paraffin 0.5, carnauba Wax 0.5, zinc oxide 6, stearic acid 1, anti-scorch agent 0.3, zinc borate 10, antimony trioxide 10, tributyl citrate 5, engine oil 8, accelerator M 1, accelerator DM 0.5, accelerator TMTD 0.5, anti-aging agent RD 1, anti-aging agent NBC 0.1.

[0015] During preparation, the rubber is firstly synthesized by an internal mixer, and then the synthetic rubber is kneaded and formed by an open mill, and after secondary vulcanization, the edge of the secondary vulcanized rubber sealing ring is trimmed to obtain the product.

[0016] The present embodiment tensile strength is 13.4Mpa,

[0017] Place this example in a constant temperature bath at 80°C fo...

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Abstract

The invention discloses a temperature-resistant silicone-rubber-mixed rubber sealing ring which is prepared by carrying out banburying, open refining and secondary vulcanization on the raw materials of silicone rubber, nitrile rubber, and the like. The sealing ring provided in the invention has the advantages of high tensile strength, excellent high temperature resistance and low temperature resistance and a simple preparation method.

Description

technical field [0001] The invention relates to the field of seal ring materials, in particular to a temperature-resistant silicone rubber compound seal ring. Background technique [0002] Silicone rubber has excellent heat resistance, cold resistance, dielectric properties, ozone resistance and atmospheric aging resistance. The outstanding performance of silicone rubber is that it can be used in a wide temperature range, which can be used at -60°C (or lower temperature) to +250°C. °C (or higher temperature) for long-term use. However, the mechanical properties of silicone rubber such as tensile strength and tear resistance are poor, and its physical and mechanical properties are not as good as most synthetic rubbers at room temperature. Poor, so silicone rubber is not suitable for ordinary conditions, but very suitable for many specific occasions. [0003] Nitrile rubber is also called butadiene-acrylonitrile rubber, referred to as NBR, with an average molecular weight of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L9/02C08L91/06C08K13/02C08K3/34C08K3/22C08K3/04C08K3/38C08K5/11C09K3/10
Inventor 邵仁杰王建平
Owner CGP WUHU SEALING
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