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Novel crosslinking additive for chemical resistant UV-curable clearcoats

: Entenmann, Marc; Greisiger, Heinz; Maurer, Roman; Schauer, Thadeus; Schauhoff, Stephanie; Ohlemacher, Jürgen

RadTech Europe:
RadTech Europe 2013. CD-ROM : Europe's event for UV/EB Curing. UV/EB - Growing through Innovation. October 15-17, 2013, Basel, Switzerland
Hannover: Vincentz, 2013
Paper 03.5, 18 Folien
RadTech Europe Conference & Exhibition <25, 2013, Basel>
Fraunhofer IPA ()
UV curing; chemische Beständigkeit; Klarlack; Kratzfestigkeit; Automobil; Beschichtung

Allyl-functionalized triazines, especially TAICROS® were used as crosslinking additives in novel UV-curing clear coats. It could be evidenced that TAICROS®, as a key component in the radiation curing formulations, has a positive effect on important properties like acid- and alkaline resistance, adhesion, hardness and scratch-resistance. The UV-curing clear coats were protected by the addition of hindered amine light stabilizers (HALS), as well as UV-absorbers and applied on state of the art OEM systems, consisting of e-coat, primer surfacer and base coat layers. Finally, UV-curing clear coats, which can be regarded as starting formulations, to adapt the mechanical and adhesion properties to the existing automotive coating systems on the market, were established.