1996-02-01

Studies on Scratch and Mar Resistance of Polyurethane Coatings 960913

This paper investigates two critical properties, scratch and mar resistance and environmental etch resistance, of automotive clearcoats, the top layer of a “basecoat/ clearcoat” automobile finish. Polyurethane clearcoats based on two commercially available polyisocyanates and two developmental polyisocyanates were tested for scratch and mar resistance by two different methods: a car wash test and a dry abrasion test. In addition, outdoor acid etch resistance of the same clearcoat systems was tested by summer outdoor exposure in Vero Beach, Florida, and in Pittsburgh, Pennsylvania. Results of the scratch and mar testing and the environmental etch studies are evaluated and compared. Structure/property relationships associated with the different polyisocyanate crosslinkers are analyzed.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: Purchase more aerospace standards and aerospace material specifications and save! AeroPaks off a customized subscription plan that lets you pay for just the documents that you need, when you need them.
X