Polyurethane

Chemical Name: Urethane, Polyurethane

Common Names: PU

ASTM D1418: AU

ASTM D2000 / SAE J200: BG

ISO/DIN 1629: AU

PU is commonly used in applications requiring excellent abrasion resistance and tensile strength. Systems subjected to high pressure and repeated shock loads can take advantage of these inherent properties of urethane.

Polyurethanes have the following properties:

— high mechanical strength

— good wear resistance

— modulus of elasticity variable over a wide range

— good flexibility

— wide hardness range with good elasticity, (polyurethane closes the gap between stretchable soft-rubber types and brittle plastics)

— very good ozone and oxidation resistance

Temperature range

-30°C ~ 100°C / -22°F ~ 212°F

Good resistance in

Mineral oils and greases, water, water-oil mixtures, aliphatic hydro- carbons.

Not resistance in

Polar solvents, chlorinated hydro-carbons, aromatics, brake fluids with glycol ether base, acids and alkalis.