Coloristic Performance of Carbon Black in Powder Coatings

Orion is a worldwide supplier of carbon black, providing high-performance specialty carbon black to tint, colorize, and enhance the performance of polymers, plastics, paints and coatings, inks and toners, textile fibers, adhesives, and sealants. The effects of different particle sizes, forms (powder or bead), and loading levels of carbon black on colorimetric properties in various powder coating resin systems were carefully investigated. With LAMP BLACK 101, "semi"-transparent films were observed with carbon black concentration of 0.8%. [...]no color value was measured for LAMP BLACK 101 with a concentration of 0.8%. In general, the after-treated gas blacks such as SPECIAL BLACK 4, SPECIAL BLACK 6 and COLOUR BLACK FW200 showed good jetness values MY but lower undertone dM. Since powder coating manufacturers prefer beaded specialty carbon black due to low dust and easy handling, a direct comparison between beads and powders based on the same type of specialty carbon black was included into the evaluation.