Mechanism and Prevention of Winter Discoloration of Light-Colored PVC Exterior Trim 940436

In recent years, trends towards monochromatic styling have increased the use of body side moldings matched to panel paint colors. These moldings can be painted to match, but are increasingly using pigmented flexible poly (vinyl chloride) to improve durability and reduce part cost. Even complicated “special effect” colors like metallics and pearlescents are now matched in pigmented vinyl. However, after several winters in severe climates like the Great Lakes region, some white moldings were observed to be noticeably yellowed. Since white is the most popular choice of car buyers, this is particularly troubling. The effect proved to be difficult to consistently reproduce in laboratory experiments.


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


Members save up to 40% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.