Acrylic rubber composition, vulcanizate, hose part, and sealing part

A rubber composition, acrylic technology, applied in the direction of engine seals, engine components, mechanical equipment, etc., can solve the problems of insufficient compression set, poor extrudability, insufficient mechanical properties, etc., and achieve good processing safety and sufficient Excellent mechanical properties and compression set resistance

Active Publication Date: 2013-03-06
DENKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silica has characteristics such as excellent elongation, but when used as it is, extrudability may be poor, mechanical properties are insufficient, and compression set is insufficient

Method used

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  • Acrylic rubber composition, vulcanizate, hose part, and sealing part
  • Acrylic rubber composition, vulcanizate, hose part, and sealing part
  • Acrylic rubber composition, vulcanizate, hose part, and sealing part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 2.7g stearic acid, 2.7g anti-aging agent A, 67.5g carbon black, 108g silicon dioxide (1), 0.5g stearamide, 2.7g liquid paraffin, 1.4g 3-ring Oxypropoxypropyldimethoxymethylsilane and 27 g of a plasticizer were kneaded in 270 g of the thus obtained acrylic rubber. 3.8 g of 1-cyanoethyl-2-methylimidazole, 0.8 g of ammonium benzoate, and 2.7 g of sodium lauryl sulfate were added to the obtained composition, and kneaded using an 8-inch open mill to obtain an acrylic rubber combination. The obtained acrylic rubber composition was heat-treated at 170° C. for 20 minutes with an electric heating type hot press, and then heat-treated with a Jill thermal aging test box at 170° C. for 4 hours to obtain Vulcanizates of acrylic rubber compositions.

Embodiment 2

[0069] An acrylic rubber composition was obtained in the same manner as in Example 1, except that 2.7 g of 3-glycidoxypropyldimethoxymethylsilane was added.

Embodiment 3

[0071] An acrylic rubber composition was obtained in the same manner as in Example 1, except that 4.1 g of 3-glycidoxypropyldimethoxymethylsilane was added.

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PUM

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Abstract

Disclosed is an acrylic rubber composition which has high processing safety and, after being subjected to secondary vulcanization (hot-air vulcanization), has sufficient mechanical properties and excellent permanent compression strain resistance. Also disclosed is a vulcanizate thereof. The acrylic rubber composition comprises (A) an epoxy group-containing acrylic rubber, (B) an imidazole compound represented by general formula (1), (C) silica, and (D) a silane coupling agent represented by general formula (2). Such an acrylic rubber composition has excellent mechanical properties such as permanent compression strain resistance and hardness.

Description

technical field [0001] This invention relates to acrylic rubber compositions. More specifically, it relates to an acrylic rubber composition excellent in balance between processing safety, compression set, and tensile strength. Background technique [0002] The vulcanized compound of acrylic rubber composition has excellent physical properties such as heat resistance, oil resistance, mechanical properties, compression set properties, etc., so it is widely used as hose parts, seal parts, vibration-proof rubber parts, etc. in the engine room of automobiles. Material. [0003] When such an acrylic rubber composition is used for various parts related to automobiles, it is necessary to impart strength to the rubber. For example, as a method of obtaining an acrylic rubber composition excellent in processing safety and tensile strength, it is known to blend a specific amount of silica, aliphatic polyhydric alcohol, guanidine compound, aromatic bismuth Amine compound technology (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08G59/20C08K3/36C08K5/3445C08K5/5419F16J15/10
CPCC08L13/00C08G59/5073C08K5/3445C08K5/5419C08K5/5435C08K3/36C08G59/3209C08L33/068
Inventor 碇怜阿部靖宫内俊明
Owner DENKA CO LTD
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