Polyurethane (AU, EU)

- Sep 02, 2017-

General Information
ASTM D2000
SAE J 200 Codes BG
Relative Cost Medium-high

40°~80°C Special Compound -55°~100°C
40°~176°F Special Compound -67°~212°F

Primary Uses

  • For high hydrualic pressure

  • Highly stressed parts subject to wear

Performs Well in…

  • Petroleum based oils and fuels

  • Aliphatic hydrocarbons

  • Vegetable oils

  • Silicone oils and greases

  • Ethylene glycol

  • Dilute acids, base and salt solutions to moderate temperatures

  • Water and steam to 150°C (300°F)

Doesn’t Perform Well in…

  • Chlorinated hydrocarbons

  • Polar solvents (ketones, ethers, esters)

  • Strong acids

Millable Polyurethane are distinguished into two types: polyester urethane (AU)  and polyesther urethane (EU).
Millable polyurethane offers superior seal performance in hydraulic situations, where high pressure, shock load, or abrasive contamination is anticipated. It provides outstanding resistance to abrasion and tear and has the highest available tensile strength among all elastomers while providing good elongation

Application Advantages

  • Excellent strength and abrasion resistance

  • Good resistance to petroleum oils

  • Good weather resistance


  • Unless specifically compounded, at elevated temperatures millable
    polyurethane begins to soften, losing its physical strength and chemical
    resistance advantages over other polymers.

  • Certain types of AU are sensitive to water and humidity and could be easily
    hydrolyzed. EU offers better resistance to water and humidity.

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