Description
Polyacrylate rubber, or ACM, is a specialty rubber whose primary strength is its ability to withstand high heat while retaining oil resistance. It is often the material of choice for applications that involve sulfur bearing lubricants, which are finding increased usage in automotive applications, especially transmission seals. From a performance standpoint, ACM occupies an intermediate position between nitrile and fluorocarbon. In addition, polyacrylates exhibit good damping characteristics, are not highly corrosive to steel, and can be compounded to provide excellent flex life and some degree of flame resistance. However, this acrylic based elastomer does have some limitations. Poor low temperature flexibility limits its usefulness and compression set is not as good as most other compounds. It is also inferior to many other elastomers in strength and water resistance.
Composition
Polyacrylate Rubber
Physical Properties*
| |
Excellent |
Good |
Fair |
Poor |
| Abrasion resistance |
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• |
|
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| Compression Set |
|
|
• |
|
| Elongation |
|
|
• |
|
| Flame resistance |
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|
|
• |
| Gas permeability |
|
• |
|
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| Low temperature flexibility |
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|
• |
|
| Tear resistance |
|
|
• |
|
| Tensile strength |
|
|
• |
|
Chemical Resistance*
| |
Excellent |
Good |
Fair |
Poor |
| Alipathic solvents |
|
• |
|
|
| Dilute acids |
|
|
• |
|
| Dilute alkalis |
|
|
• |
|
| Ozone |
• |
|
|
|
| Steam |
|
|
|
• |
| Sulfer containing oils |
|
• |
|
|
| Water |
|
|
|
• |
| Weather |
• |
|
|
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Operating Temperature
0 to 350 °F
*Excellent, good, fair and poor are intended to serve as general guidelines only. Actual testing in the application environment is always recommended. |
