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Vibration-isolating rubber composition

A rubber composition and anti-vibration technology, which can be used in mechanical equipment, low internal friction springs, springs made of plastic materials, etc. Effects of heat resistance and low dynamic magnification

Inactive Publication Date: 2012-11-07
SUMITOMO RIKO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, as a measure to lower the dynamic ratio, for example, by using carbon black as a reinforcing agent, controlling the compounding amount, particle size, structure and other factors of carbon black, it was insufficient as a measure for lowering the dynamic ratio.

Method used

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  • Vibration-isolating rubber composition
  • Vibration-isolating rubber composition
  • Vibration-isolating rubber composition

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] As the preparation method of the above-mentioned silica (component B), the reaction recipe of precipitated silica can be mentioned, for example, by neutralizing an aqueous alkali silicate solution (commercially available sodium silicate aqueous solution) with an inorganic salt to precipitate two It is prepared by the method of precipitation of silicon oxide. Specifically, at first, the following method can be adopted: a sodium silicate aqueous solution of a specific concentration is loaded into a specific amount of reaction container, and the method of adding an inorganic acid (unilateral addition reaction) under specific conditions; Add sodium silicate and inorganic acid (simultaneous addition method) within a certain period of time while controlling the pH and temperature in the reaction solution of a certain amount of warm water. Next, the precipitated silica slurry obtained by the above method is filtered and washed with a filter capable of washing the filter cake (...

Embodiment 1

[0166] Mix 100 parts of NR, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of anti-aging agent, 2 parts of paraffin, 5 parts of mineral oil, 2 parts of silane coupling agent (i), 30 parts of silicon dioxide (i) and vulcanization 3 parts of auxiliary agent (i), these were kneaded at 140 degreeC for 5 minutes using the Banbury internal mixer. Next, 1 part of vulcanizing agent, 2 parts of vulcanization accelerator (i) and 1 part of vulcanization accelerator (ii) were mixed therein, and kneaded at 60° C. for 5 minutes using an open roll to prepare a vibration-proof rubber composition.

Embodiment 2~34

[0167] Embodiment 2~34, comparative example 1~7

[0168] An anti-vibration rubber composition was prepared according to Example 1, except that the blending amounts of each component were changed as shown in Tables 1 to 5 described below.

[0169] Using the anti-vibration rubber compositions of Examples and Comparative Examples thus obtained, each characteristic was evaluated according to the following criteria. The results are shown together in Tables 1 to 5 described later.

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Abstract

A vibration-isolating rubber composition which comprises (A) a diene rubber, (B) a silica that has (a) a silanol group density of the silica surface of 3.0 groups / nm2 or more as determined by the Sears' titration method, (ss) a mean particle diameter of 10[mu]m or less, and (?) a BET specific surface area of 15 to 60m2 / g, (C) a silane coupling agent having a specific structure, and (D) zinc monomethacrylate and / or a specific mono(meth)acrylate, and in which the content of the component (B) is 10 to 100 parts by weight per 100 parts by weight of the component (A). Therefore, the vibration-isolating rubber composition exhibits excellent heat resistance, durability and stiffness and a low dynamic multiplication (a low ratio of dynamic spring constant to static spring constant).

Description

technical field [0001] The present invention relates to an anti-vibration rubber composition. Specifically, it relates to an anti-vibration rubber composition for an engine mount or the like used in automobiles and the like to support an engine and suppress vibration transmission. Background technique [0002] In general, automobiles use anti-vibration rubber compositions to achieve the purpose of reducing vibration and noise. Since such an anti-vibration rubber composition must have high rigidity, high strength, and suppress vibration transmission, it is required to reduce the value of the dynamic magnification [dynamic spring constant (Kd) / static spring constant (Ks)] (lower dynamic magnification). In the past, as a measure to lower the dynamic ratio, for example, by using carbon black as a reinforcing agent, controlling the compounding amount, particle size, structure and other factors of carbon black, it was insufficient as a measure for lowering the dynamic ratio. . T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08K3/36C08K5/098C08K5/10C08K5/541F16F1/36
CPCC08K5/548C08K5/098C08K3/36C08K5/101C08L21/00
Inventor 远山丰久
Owner SUMITOMO RIKO CO LTD
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