composição de revestimento fotoativável, processo para produção de uma camada de revestimento, e, uso de uma composição de revestimento

• Main Authors: JOSEPHUS CHRISTIAAN VAN OORSCHOT, HUIG KLINKENBERG
• Format: Patent
• Language: Portuguese
• Published: 22.02.2011
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS THEREFOR; WOODSTAINS

Photoactivatable coating composition comprising at least one photoinitiator and a base-catalysed polymerisable or curable organic material comprising at least one polyisocyanate and at least one compound containing isocyanate reactive groups, wherein the isocyanate reactive groups comprise at least one thiol group and the photoinitiator is a photolatent base.Preference is given to a coating composition wherein the photolatent base is selected from the group of N-substituted 4-(ortho-nitrophenyl)dihydropyridine, a quaternary organo-boron photoinitiator, and an alpha-amino acetophenone. The composition additionally may comprise an organic acid, a metal complex and/or a metal salt as a cocatalyst and/or a sensitiser selected from the group of thioxanthones, oxazines, rhodamines, and preferably from the group of benzophenone and derivatives thereof.