UV Assisted spraying: the flexible approach to UV curing

Several years ago AkzoNobel Car Refinishes presented a novel UV-A curing high solids clear coating, based on a modified 2K technology and a photolatent base catalyst [1]. This unique coating allows curing in only 6 minutes with UV-A light at room temperature (compared to 30 minutes at 60 ºC for conventional 2K PUR coatings). One of the unique properties of this clearcoat is the fact that the 2K curing reaction will take place no matter if and how much UV exposure is applied. The release of the latent catalyst by UV light only determines the speed of the curing reaction; dry film properties are not influenced in any way by the curing process.