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Acrylic rubber composition

A technology of acrylic rubber and composition, applied in the direction of non-rotational vibration suppression, etc., can solve the problems of damaged anti-vibration effect and easy reduction of tanδ, and achieve the effect of improved anti-vibration and excellent tanδ value

Active Publication Date: 2017-11-28
NOK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In conventional rubber materials, it has been found that tanδ tends to decrease at high temperature, and the anti-vibration effect tends to be impaired.

Method used

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  • Acrylic rubber composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 100 parts by weight of acrylic rubber containing active chlorine groups

[0038] (UNIMATEC product Noxtite PA401-L)

[0039] Styrene resin A 20 parts by weight

[0040] (YASUHARA CHEMICAL YS RESIN SX100)

[0041] Sulfur 0.2 parts by weight

[0042] These were kneaded with a pressurized kneader, followed by roll processing with an open roll, and after vulcanization at 190°C for 8 minutes, oven vulcanization (secondary vulcanization) at 175°C for 5 hours to form a thickness of 2mm of flakes.

[0043] Kneading properties, roll workability, and vulcanization formability were evaluated, and dynamic properties (tan δ) were measured.

[0044] Mixability:

[0045] (1) When kneading with a pressurized kneader, no bridge (rubber block) is formed in the gap between the rotor and the weight, and the kneading process is carried out stably

[0046] (2) There is no pollution in the mixer after the blank is discharged

[0047] In (1) and (2), all good samples were evaluated as ◯...

Embodiment 2

[0061] In Example 1, instead of the styrene resin A, the same amount of the styrene resin B (ARUFONUP-1150 manufactured by Toa Synthetic Products) was used.

Embodiment 3

[0063] In Example 1, the styrene resin A was changed to 40 parts by weight.

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Abstract

Provided is an acrylic rubber composition in which 5-80 parts by weight, preferably 10-60 parts by weight, and more preferably 20-40 parts by weight of a styrene resin are added to 100 parts by weight of acrylic rubber. By adding a specific proportion of the styrene resin to the acrylic rubber, it is possible to mold a vibration-damping member that has an excellent tan[delta] value at high temperatures and improved vibration damping properties. The acrylic rubber composition can be used effectively as a molding material for a mount, a grommet, or the like in the vicinity of an automobile engine used under a high-temperature environment.

Description

technical field [0001] This invention relates to acrylic rubber compositions. More specifically, it relates to an acrylic rubber composition capable of forming a part having excellent vibration-proof properties at high temperature. Background technique [0002] In conventional rubber materials, it has been found that tan δ tends to decrease at high temperature, and the anti-vibration effect tends to be impaired. Although acrylic rubber can be used as a molding material for anti-vibration parts such as brackets and grommets around automobile engines used in high-temperature environments, the same tendency has been found in this case, and it is desired to improve this tendency. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Application Laid-Open No. 11-158343. Contents of the invention [0006] The problem to be solved by the invention [0007] An object of the present invention is to provide an acrylic rubber compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/08C08L25/04F16F15/08
CPCC08L25/04C08L33/08F16F15/08C08L13/00
Inventor 根上哲郎
Owner NOK CORP
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