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

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

Vincentz Network GmbH & Co. KG, Hannover; u.a.:
EC European Coatings Congress. Proceedings : Nuremberg, Germany, 18 + 19 March 2013
Hannover: Vincentz, 2013
Paper 1.4, 4 pp.
European Coatings Congress <2013, Nürnberg>
European Coatings Show <2013, Nürnberg>
Conference Paper
Fraunhofer IPA ()
UV curing; chemische Beständigkeit; Klarlack; Kratzfestigkeit; scratch resistance; Kraftfahrzeug; Beschichtung; Schutzschicht; Härten; Haftfestigkeit

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.