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High-damping composition

A technology of high damping composition and basic polymer, which is applied in the direction of mechanical equipment, low internal friction springs, springs made of plastic materials, etc., can solve the problems of reduced processability of high damping compositions, blooming of high damping components, etc. The effect of achieving high damping performance

Inactive Publication Date: 2012-10-17
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is a problem that the workability of the high-damping composition mixed with a large amount of inorganic filler and adhesion imparting agent is reduced, and it is difficult to process the above-mentioned high-damping composition in order to manufacture a high-damping member having a desired three-dimensional shape. Kneading or molding into the above three-dimensional shape
[0008] However, when the compounding ratio of the damping property imparting agent is increased in order to further improve the damping performance compared to the present situation, there is a problem that the above damping property imparting agent tends to bloom on the surface of the high damping member.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0111] Unless otherwise specified, the preparation and testing of the high damping composition in the following examples and comparative examples were carried out in an environment with a temperature of 20° C. and a relative humidity of 55%.

[0112]

[0113] 2 liters of distilled water was added to 150 ml of high-ammonia natural rubber latex [manufactured by SOTECH (Malaysia), rubber solid content concentration: 60.2% by mass], diluted so that the rubber solid content concentration became 10 mass%, and 0.12% naphthenic acid was added Sodium was used for stabilization, and then sodium dihydrogen phosphate was added to adjust the pH to 9.2.

[0114] Then, 7.8 g of alkaline protease [ALCALASE (registered trademark) 2.0M manufactured by Novozymes Japan Co., Ltd.] 2.0 M] was added as a deprotease and dispersed in 100 ml of distilled water, and the pH was adjusted to 9.2 again, and then the pH was adjusted at 37 The deproteinization treatment was carried out by keeping at ℃ for 2...

Embodiment 2

[0137] Except that the amount of alkaline protease as a deproteinase was 2.0 g, deproteinization treatment was performed in the same manner as in Example 1 to prepare a deproteinized natural rubber. The deproteinized natural rubber had a total nitrogen content of 0.25% by mass, a gel content of 18.8% by mass, and a weight average molecular weight of 1.3 million.

[0138] Furthermore, a high-damping composition was prepared in the same manner as in Example 1, except that the above-mentioned deproteinized natural rubber was used in the same amount.

Embodiment 3～5， comparative example 3、4

[0167] With respect to 100 parts by mass of deproteinized natural rubber as the base polymer, the amount of silica was 80 parts by mass (Comparative Example 3), 100 parts by mass (Example 3), 150 parts by mass (Example 4), Except 170 parts by mass (Example 5) and 180 parts by mass (Comparative Example 4), a high damping composition was prepared in the same manner as in Example 2.

[0168] The above-mentioned damping characteristic test was implemented on the high-damping composition prepared in each of the above-mentioned Examples and Comparative Examples, and their characteristics were evaluated. The results are shown in Table 3 together with the results of Example 2. In addition, all the resins in the characteristic column in a table|surface are the relative values ​​when comparative example 1 was set as 100 as mentioned above.

[0169] table 3

[0170]

[0171] From the results of Examples 2 to 5 and Comparative Examples 3 and 4 in Table 3, it can be seen that by setti...

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Abstract

The invention provides a novel high-damping composition. The novel high-damping composition can make high-damping components with high-damping performances and no requirements for deformation experiences due to low rigidity when newly produced before a delivery. The novel high-damping composition is formed by making deproteinized nature rubbers with less than 0.3 mass percent of nitrogen contents as the basic polymer and then adding 100 to 170 weight parts of silicon dioxide relative to 100 weight parts of the deproteinized nature rubbers.

Description

technical field [0001] The present invention relates to highly damped compositions to be used as the basis for highly damped components for damping or absorbing vibrational energy transmission. Background technique [0002] High damping parts are used in a wide range of fields such as structures such as buildings and bridges, industrial machinery, aircraft, automobiles, railway vehicles, computers and their peripheral equipment, home appliances, and automobile tires. By using the above-mentioned high damping member, vibration energy transmission can be attenuated or absorbed, that is, vibration isolation, shock absorption, damping, vibration prevention, etc. can be performed. [0003] The above-mentioned high-damping member is formed of a high-damping composition containing natural rubber or the like as a base polymer. In order to increase the hysteresis loss when vibration is applied and improve the performance of efficiently and rapidly attenuating the energy of the vibra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L15/00C08K3/36F16F1/36
Inventor 富田岳宏伊藤真义
Owner SUMITOMO RUBBER IND LTD
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