UV-LED COATING COMPOSITIONS

• Main Author: GAUDL, Kai-Uwe Walter
• Format: Patent
• Language: English; French
• Published: 04.03.2021
• 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; 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 MATERIALS THEREFOR; WOODSTAINS

The present invention relates to UV-LED light curable coating compositions comprising a compound having at least one alpha, beta-ethylenically unsaturated polymerizable double bond, a type II photoinitiator system based on a thioxanthone and an amine, and a colorant. Optional inclusions are a type I photoinitiator and an optical brightener. The UV-LED curable composition provides good surface cure and low yellowing. La présente invention concerne des compositions de revêtement durcissables à la lumière d'une DEL UV comprenant un composé comportant au moins une double liaison polymérisable alpha- ou bêta-éthyléniquement insaturée, un système photoinitiateur de type II reposant sur une thioxanthone et une amine, et un colorant. Des inclusions facultatives sont un photoinitiateur de type I et un azurant optique. La composition durcissable par DEL UV assure un bon durcissement de surface et un faible jaunissement.