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Vibration-damping rubber composition

A rubber composition and anti-vibration technology, which can be applied in other chemical processes, chemical instruments and methods, etc., can solve problems such as the reduction of physical properties, achieve excellent vibration resistance and fatigue resistance, excellent thermal aging resistance, and take into account spring characteristics. Effect

Inactive Publication Date: 2012-02-01
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sulfur used as a vulcanizing agent for natural rubber decomposes in a high-temperature atmosphere above 100°C
Therefore, the anti-vibration rubber composition using natural rubber as a polymer tends to be prone to physical degradation due to long-term heat aging caused by weather and other reasons.

Method used

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  • Vibration-damping rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] Mix 100 parts of NR, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of anti-aging agent, 2 parts of wax, 3 parts of oil, 30 parts of carbon black, 0.1 part of vulcanization aid (i), and use them in Banbury The mixer performs kneading at 140°C for 5 minutes. Next, 1 part of a vulcanizing agent, 2 parts of a vulcanization accelerator (i), and 1 part of a vulcanization accelerator (ii) were mixed therein, and kneaded at 60°C for 5 minutes using an open mill to prepare a vibration-proof rubber composition.

Embodiment 2～17、 comparative example 1～7

[0097] As shown in Tables 1 to 3 described later, a vibration-proof rubber composition was prepared based on Example 1, except that the compounding amount of each component was changed.

[0098] Using the anti-vibration rubber compositions of the examples and comparative examples obtained in this way, each characteristic was evaluated according to the following criteria (in addition, the evaluation of spring characteristics was carried out only in Examples 7 to 17). The results are shown in Table 1 to Table 3 described later.

[0099] 〔Heat aging experiment〕

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Abstract

A vibration-damping rubber composition which comprises (A) natural rubber (NR) as the main component and contains (B) zinc monomethacrylate and (C) a sulfur-containing vulcanizing agent, wherein the content of the component (B) is set within the range of 0.1 to 10 parts by weight with respect to 100 parts by weight of the component (A). The vibration-damping rubber composition exhibits excellent vibration-damping properties and has excellent heat aging resistance over a long period.

Description

Technical field [0001] The present invention relates to an anti-vibration rubber composition. Specifically, it relates to an anti-vibration rubber composition used for supporting functions of engines such as automobiles and engine mounts for suppressing vibration transmission. Background technique [0002] Generally, in automobiles, anti-vibration rubber compositions are used for the purpose of reducing vibration and noise. In addition, in automotive applications, the anti-vibration rubber composition described above is also required to have durability against heat aging (prevention of heat aging) as properties other than vibration isolation. Especially in emerging markets such as China, India, Brazil, etc., there are requirements for improving the heat aging resistance. [0003] However, as the polymer of the aforementioned anti-vibration rubber composition, various conventional rubbers can be used. Among them, natural rubber (NR) has a high frequency of application due to its lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K5/098C08L9/00C08L11/00C09K3/00
CPCC08K5/098C08K5/101C08L7/00
Inventor 藤井奈奈子远山丰久
Owner SUMITOMO RIKO CO LTD
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