Radiation curable compositions from urethane groups containing aliphatic prepolymers having ethylenically unsaturated double bonds

• Main Authors: SCHWALM, REINHOLD, MENZEL, KLAUS, VOELLINGER, FRANK, BECK, ERICH
• Format: Patent
• Language: English; French; German
• Published: 17.03.1999
• Edition: 6
• 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 MATERIALS THEREFOR; WOODSTAINS

Die vorliegende Erfindung betrifft strahlungshärtbare Zubereitungen, enthaltend i) wenigstens ein aliphatisches, Urethangruppen enthaltendes Prepolymer mit im Mittel wenigstens 2 ethylenisch ungesättigten Doppelbindungen, ii) wenigstens einen monofunktionellen Ester mit einer α,β-ethylenisch ungesättigten Carbonsäure mit einem monofunktionellen Alkanol, das gesättigte, carbocyclische oder heterocyclische Strukturelemente aufweist und iii)gegebenenfalls einen di- oder polyfunktionellen Ester einer α,β-ethylenisch ungesättigten Carbonsäure mit einem aliphatischen Di- oder Polyol. Die Erfindung betrifft weiterhin die Verwendung der strahlungshärtbaren Zubereitungen zum Beschichten von Substraten, ein Verfahren zum Beschichten von Substraten sowie die beschichteten Substrate. A radiation curable polyurethane composition contains an aliphatic urethane group comprising a pre-polymer having two ethylenically unsaturated double bonds per molecule and a monofunctional ester of an alpha , beta -unsaturated carboxylic acid having a saturated 5-6C ring or heterocyclic ring. A radiation curable composition (I) contains: (A) an aliphatic, urethane group containing pre-polymer having on average, two ethylenically unsaturated double bonds per molecule; (B) a monofunctional ester of an alpha , beta -unsaturated carboxylic acid with a monofunctional alcohol, that has a saturated 5-6 membered carbon ring or heterocyclic ring comprising 1-2 oxygen atoms; and optionally (C) a di- or poly-functional ester of an alpha , beta -unsaturated carboxylic acid with an aliphatic di- or polyol. An Independent claim is included for a coating process of substrates by applying (I) to a substrate, optionally removing a solvent and irradiating with UV or an electron beam.