Polyacrylate (ACM, PA)
Polyacrylates or simply acrylate rubbers are copolymers having two major components: the backbone ( monomeric acid ester of alkyl or alkoxy) and the reactive curesite. ACMs have good resistance to high heat and oil which is better than NBRs. It also well resists oxygen and ozone even at high temperature, but is with poorer water and low temperature flexibility compared to NBRs. Special ACM can improve low temperature flexibility to -40°C (TR10 value) without reducing oil and heat resistance .
Cure system - Amine based & metal soaps Cured
Standard ACM compounds are Amine based and metal soaps combined to vulcanize.
Other Common Variations
• Polyacrylates usually are applied in automatic industry, especially in automatic transmission and steering fluids.
ASTM D 1418 Designation: ACM
ISO/DIN 1629 Designation: ACM
ASTM D2000 / SAE J 200 Codes: DF, DH, EH
Standard Color(s): Black
Hardness Range: 45 to 80 Shore A
Relative Cost: Medium – High
Standard Low Temperature: -15°C / -5°F
Standard High Temperature: 150°C / 302°F
Special Compound Low Temperature: -40C / -40°F
Special Compound High Temperature: 175°C / 345°F
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