Process for curing a polymerizable composition

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 167/00 (2006.01) C08G 18/62 (2006.01) C08J 3/28 (2006.01) C09D 133/06 (2006.01)

Patent

CA 2255597

By means of a curing process combining thermal and UV curing, it is possible, using compositions comprising (A) a coating system based on a polyacrylate polyol or polyester polyol with melamine, or a polyacrylate polyol and/or polyester polyol with a blocked or unblocked polyisocyanate, or a carboxyl-, anhydride- or amino-functional polyester and/or polyacrylate with an epoxy- functional polyester or polyacrylate, (B) an OH-, NH2-, COOH-, epoxy- or NCO- functional resin containing, in addition, at least one ethylenically unsaturated double bond, which is separated from the functional group by a spacer group, and (C) at least one photoinitiator, to obtain coatings having good surface properties.

Ce processus de cuisson combinant un traitement thermique et un traitement par U.V. permet d'obtenir des revêtements présentant de bonnes propriétés de surface, en utilisant des compositions comprenant (A) un système de revêtement basé sur un polyol de polyacrylate ou de polyester avec de la mélamine ou un polyol de polyacrylate et/ou de polyester avec un polyisocyanante séquencé ou non séquencé, ou un polyester à fonctionnalité carbonyl, anhydride ou amino et/ou un polyacrylate avec un polyester ou polyacrylate à fonction époxy, (B) une résine à fonctionnalité OH, NH2, COOH, époxy ou NCO contenant au moins une double liaison insaturée en éthylène, séparée du groupe fonctionnel par un groupe espaceur, et (C) au moins un photoamorceur.

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