Acrylic rubber composition

An acrylic rubber and composition technology, which is applied in shock absorbers, jet propulsion devices, transportation and packaging, etc., can solve the problems of easy reduction of tanδ and damage to the anti-vibration effect, and achieves excellent tanδ value and improved anti-vibration performance. Effect

Active Publication Date: 2017-12-01
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

[0040] Acrylic rubber containing active chlorine groups 100 parts by weight

[0041] (UNIMATEC product Noxtite PA401-L)

[0042] Styrene acrylic resin containing epoxy group 20 parts by weight

[0043] (East Asia synthetic products ARUFON UG-4040)

[0044] Sulfur 0.2 parts by weight

[0045] 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.

[0046] Kneading properties, roll workability, and vulcanization formability were evaluated, and dynamic properties (tan δ) were measured.

[0047] Mixability:

[0048] (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

[0049] (2) There is no pollution in the mixer after the blank is discharged

[0050] In (1) and (2),...

Embodiment 2

[0064] In Example 1, instead of the epoxy group-containing styrene acrylic resin, the same amount of hydroxyl group-containing styrene acrylic resin (Toagosei ARUFON UH-2170) was used.

Embodiment 3

[0066] In Example 1, the amount of the epoxy group-containing styrene acrylic resin was changed to 40 parts by weight.

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PUM

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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 acrylic resin comprising a functional group other than a carboxyl group are added to 100 parts by weight of acrylic rubber. By adding a specific proportion of the styrene acrylic 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 [0006] Patent Document 2: Japanese Unexamined Patent Publication No. 2011-74172 [0007] Patent Document 3: Japanese Patent Laid-Open No. 2000-338723. Content...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/06C08K5/10C08L25/08C08L63/00F16F15/08
CPCC08L63/00C08L33/08C08L33/16C08L25/14C08K3/06C08K5/10C08L25/08C08L33/06F16F15/08B60K5/1208C08L13/00F16F1/3605F16F1/3732F16F2224/025F16F2226/04
Inventor 根上哲郎
Owner NOK CORP
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