Novel UV-curable clearcoats with improved chemical, mechanical and adhesive properties

Novel UV-curing clear coats with outstanding properties were developed. As a key component in the radiation curing formulations, allyl-functionalized triazines, especially TAICROS® in combination with Desmolux® XP2738 and trimethylolpropane triacrylate TMPTA were used. The UV-curing clearcoats were UV-protected by the addition of hindered amine light stabilizers (HALS), as well as UV-absorbers and applied as a last layer of an OEM system, consisting of an e-coat, a primer surfacer and a basecoat. It was found that TAICROS® has a positive effect on such important properties of a UV-curing clear coat as chemical resistance, adhesion, hardness and scratch-resistance. Based on these findings, TAICROS® can be regarded as a valuable component for the adjustment of the chemical, mechanical and adhesive properties of both already existing as well as new formulations of UV-curable clearcoats.