Polyurethane, also known as PU, has been mass-produced since 1940.
-	It is a thermoplastic or thermoset, (typically reinforced), polyadduct.
-	Applications: Used in automotive structural members, computer housings, furniture, and packaging foams.
-	General properties: It has high impact resistance, dielectric strength, chemical resistance, and abrasion resistance. It can be made into films, solid moldings, or flexible foams. Becomes brittle with outdoor exposure.
-	Trade Name: Estane, Pellanthane.