Role of Cobalt drier and its replacement with next generation driers in high solid alkyd based systems

摘要

This article depicts an overview of chemistry and various types of driers used in auto-oxidative type of curing systems. The system is mainly comprised of high solid alkyd. Driers are metal salts which catalyse auto oxidation process. Several metal driers have been used in paint industries for decades. However, as we move towards greener technology, there is a need for replacing the traditional metal driers with more eco-friendly metal driers by technological breakthroughs. Cobalt drier is one of the essential drier of this category and nowadays becoming area of concern for futuristic point of view. The pronounced genotoxicity and carcinogenicity of Cobalt compounds stimulate the legislative pressure on the paint producing industry to replace these compounds. Understanding exact role of Cobalt drier in auto-oxidative type of system and finding perfect fit for its replacement is need of the day. Several investigations and practical approaches proposed the use of Iron, Strontium, Molybdenum and Vanadium compounds as the replacement of Cobalt based drier in high solid alkyd systems. Hence, we need to start making use of these next generation driers to take it to the next level.