Coil coatings are very versatile and are the products of choice for pre-coated metal applications in the furniture, construction, household appliance and transportation industries.
Coil coating is a continuous process in which specialty coatings are applied to steel or aluminum coil before fabrication into end products. Formulators demand additives that help improve coating adhesion performance and mechanical properties of the finished coating. We offer a broad portfolio of fumed metal oxide products for coil coatings and pretreatment of coils that address formulators' unique needs in this specific application.
CAB-O-SIL® fumed silica can be added to liquid coil coating primer and top coat formulations to provide rheology control, anti-sag of thick film build, and anti-settling of pigmented coating systems. It also imparts good leveling properties, resulting in uniform coating thickness in coil coatings. In the cured coating, CAB-O-SIL fumed silica improves hardness, scratch resistance, chemical resistance and corrosion resistance.
Pretreatments are often used to help provide improved corrosion resistance of the substrate, often by passivating or converting the metal surface, typically via phosphate or chromate chemistries. The type of chemical treatment varies with the type of metal being used. Additionally, pretreatment can enhance performance of the fully coated product by adding topography to the metallic surface to help facilitate the bonding between the metal and the coating.
CAB-O-SPERSE® dispersions enhance the performance of substrate pretreatment for coil coating by increasing micro-roughness. This promotes adhesion of subsequent coating layers and increases the hardness and durability of the fully coated products. Such surface topography can promote adhesion of the coating to the substrate, help dissipate stress under load to improve durability, and facilitate stable and consistent distribution of anti-corrosive additives.
As with all coating systems, we also offer a complete range of specialty carbon black products for pigmenting coil coatings.