EFFECTIVENESS OF CURING CATALYST ADDITIVES ON FORMING THE PROPERTIES OF POWDER COATINGS

Abstract

The article presents the results of experimental studies on the influence of various curing catalysts on the physico-mechanical properties of powder coatings under reduced curing conditions. The study investigated three catalysts: tetradonium bromide (DT 3126-4), triphenylethylphosphonium bromide (ADDITOL® P 964), and a carboxyl-terminated polyester oligomer (JG804A), each introduced into the system at a concentration of 0.6%. Key performance indicators such as impact resistance, flow properties, bending strength, and adhesion were evaluated according to relevant ISO standards. The most effective catalyst was DT 3126-4, which ensured high-quality polymerization even at a curing temperature of 120 °C. The study concludes with recommendations regarding the suitability of each catalyst depending on operational conditions and technological requirements. The results may be applied to the optimization of powder coating formulations with enhanced performance characteristics under energy-saving curing regimes.