Polyacrylate (ACM, PA) or simply acrylate rubbers are copolymers that have two major components, momoneric acid ester of alkyl or alkoxy and a reactive curesite. ACMs have better resistance to high heat and oils than NBRs. it also has good resistance to oxygen and ozone at high temperatures. It has relatively poor resistance to water and low temperature flexibility compared to NBRs. Special ACM compounds and improve the low temperature flexibility to -40°C (TR10 value) without affecting its oil and heat resistance.
Cure system – Amine based and metal soaps cured
Standard ACMs are amine based and metal soaps combined to vulcanize.
Other Common Variations
- Polyacrylates are usually applied in automatic industry, often in automatic and transmission and steering fluids.
General information
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
Service Temperatures
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 / 347°F
| Performs well in | Does not perform well in | |
| Mineral oils (transmission and steering fluids) | Alcohol | |
| Ozone, weather and hot air | Aromatics | |
| Hot water and steam | ||
| Acids, alkalis and amines | ||
| Brake fluids |