Ultra-low temperature curing powder coating via real Michael addition

 
Following our recent success of using real Michael addition (RMA) chemistry for solvent- (Acure) and water-borne (Acure AQ ) products, RMA has been recently explored for powder coating at allnex, aiming at creating a new 'toolbox' for ultra-low temperature curing powder coatings. The high reactivity of RMA reaction is very suitable for such application and enable lowering curing temperature significantly to 90-120 oC. In addition, through the design of a novel catalyst system, we can get good control over curing speed and achieve a 'smart' retarded curing profile. Such unique curing profile maximises paint flow within a given curing window and consequently maximise appearance. A series of products targeted both in-door and outdoor applications have been developed. Potential applications include heat sensitive substrates such as MDF, solid wood, plastic and composite, as well as big metal components that are slow to heat.