100% Solids Aliphatic Polyurea Coatings for Direct-to-Metal Applications

By Timothy P. Takas

Sprayable polyurea coatings offer a unique combination of properties, such as rapid cure speed even at freezing temperatures, the ability to spray high build films in a single pass, and zero VOC. These features have allowed polyurea coatings to grow rapidly in the area of field-applied coatings, where low temperature cure and minimal down time are critical.

New hindered amine adducts have been developed which yield aliphatic polyurea systems that have the potential to replace multiple coat systems with a single direct-to-metal exterior coating. The chemistry of the hindered amine adducts and in-depth coating performance, including effects of various formulating techniques, will be presented, with emphasis on PVC and UV packages. such as rapid cure speed even at freezing temperatures, the ability to spray high build films in a single pass, and zero VOC.

These features have allowed polyurea coatings to grow rapidly in the area of field-applied coatings, where low temperature cure and minimal down time are critical. New hindered amine adducts have been developed which yield aliphatic polyurea systems that have the potential to replace multiple coat systems with a single direct-to-metal exterior coating.

The chemistry of the hindered amine adducts and in-depth coating performance, including effects of various formulating techniques, will be presented, with emphasis on PVC and UV packages.