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.


Performs Well In...

Doesn’t Perform Well In...

n           Mineral oils (transmission and steering fluids)

n           Alcohol

n           Ozone, weather and hot air.

n           Aromatics and chlorinated hydrocaebons

n           Hot water and steam

n           Acids, alkalis and amines

n           Brake 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)   Hardness Range

Black   45 to 80 Shore A

Relative Cost

Medium - High

 

Service Temperatures

Standard Low

-15°C

Temperature

-5°F

Standard High

150°C

Temperature

300°F

Special Compound

-40°C

Low Temperature

-40°F

Special Compound

175°C

High Temperature

345°F

 

Performs Well In...

Doesn’t Perform Well In...

Service Temperatures

n    Mineral oils (transmission and steering fluids)

n    Alcohol

Standard Low

-15°C

n    Ozone, weather and hot air.

n    Aromatics and chlorinated hydrocaebons

Temperature

-5°F

n    Hot water and steam

n    Acids, alkalis and amines

n    Brake fluids