Abstract: Solvent-based, dual cure coatings incorporating thermally curable blocked polyisocyanates, which also contain unsaturated linkages, and a method for preparing these coatings. The unsaturated linkages, such as acrylate groups, can be crosslinked by free-radical mechanisms such as UV curing.

Abstract: The present invention relates to a process for lowering the viscosity of compositions containing compounds having urethane groups, in which all or some of the urethane groups contained therein are reacted with monoisocyanates to form allophanate groups. The present invention also relates to compounds having allophanate groups and compositions containing such compounds, wherein at least 10 mole % of the allophanate groups contained therein correspond to formula I) wherein R is an alkyl, aralkyl or aryl radical which has up to 20 carbon atoms and optionally contains heteroatoms and wherein these radicals can also have, in addition to the NCO group present as part of the allophanate group, other functional groups which are neither isocyanate groups nor functional groups derived from isocyanate groups.

Abstract: The present invention relates to a process for preparing hydroxyalkyl (meth)acrylates by reacting at least one compound A which contains at least one epoxide group with at least one compound B which contains at least one carboxylic acid group, wherein A and/or B also contains at least one (meth)acrylate group, in the presence of Lewis acid catalysts, each of which contains at least one directly bonded di(cyclo)alkylamino group.

Abstract: The present invention relates to blocked polyisocyanates containing at least one radiation-curable groups and at least one structural unit of the formula (II) wherein R1, R2 and R3 independently of one another are hydrogen or a C1-C4 alkyl radical or a cycloalkyl radical, R4 is a C1-C4 alkyl, C6-C10 cycloalkyl or C7-C14 aralkyl radical and x is an integer from 1 to 5. The present invention also relates to a process for preparing these blocked polyisocyanates and to dual-cure coating, adhesive or sealant compositions containing these polyisocyanates.

Abstract: The present invention relates to water-free and cosolvent-free binder compositions A) containing of a mixture of A1) at least one emulsifier-free, hydrophobic binder containing groups which can be polymerized by high-energy radiation and A2) at least one hydrophilic unsaturated polyester resin containing the reaction product of a) at least one unsaturated dicarboxylic acid and/or an anhydride thereof, b) at least one polyalkylene oxide compound having a number average molecular weight of 106 to 2000, at least 2 hydroxyl end groups and at least 2 oxyalkylene units, wherein at least 50% of the oxyalkylene units are oxyethylene units, and c) at least one hydroxy-functional compound containing at least one polymerizable unsaturated group per molecule selected from vinyl, allyl, methacrylic and acrylic groups.

Abstract: The present invention provides a process for preparing radiation-curing allophanates having residual monomer contents of less than 0.5% by weight and an NCO content of less than 1% by weight, wherein (A) compounds containing isocyanate groups, (B) hydroxy-functional compounds which contain groups which react, with polymerization, with ethylenically unsaturated compounds on exposure to actinic radiation (radiation-curing groups) and (C) optionally further compounds containing NCO-reactive groups, also optionally in the presence of a catalyst, are used to form NCO-group-containing urethanes having radiation-curing groups, which are subsequently reacted, without further addition of compounds containing isocyanate groups, in the presence of an allophanatization catalyst, the ratio of NCO groups of the compounds from A) to the OH groups of the compounds from B) and, where used, C) being 1.45:1.0 to 1.1:1.0.

Abstract: The invention relates to a process for preparing binders which contain 1) allophanate groups, 2) groups that react with ethylenically unsaturated compounds with polymerization on exposure to actinic radiation (radiation-curing groups) and 3) optionally NCO-reactive groups, by reacting at temperatures ?130° C. A) one or more NCO-functional compounds containing uretdione groups with B) one or more compounds that contain isocyanate-reactive groups and groups that react with ethylenically unsaturated compounds with polymerization on exposure to actinic radiation (radiation-curing groups), and then C) with one or more saturated, hydroxyl-containing compounds other than B), at least one of these compounds having an OH functionality of ?2, in the presence of D) a catalyst containing one or more ammonium salts or phosphonium salts of aliphatic or cycloaliphatic carboxylic acids, the reaction with compounds C) taking place at least proportionally with the formation of allophanate groups.

Abstract: The invention provides innovative blocked polyisocyanates whose crosslinking is initiated thermally and photochemically. The polyisocyanates comprise at least one thermally reversibly blocked NCO group whose blocking agent contains at least one group which on exposure to actinic radiation reacts, with polymerization, with ethylenically unsaturated compounds. A process for preparing the polyisocyanates, and their use in binders, is also provided.

Abstract: The present invention relates to a process for preparing radiation-curing binders containing allophanate groups by reacting at temperatures of ?130° C. A) one or more compounds containing uretdione groups with B) one or more OH-functional compounds which contain groups which react, with polymerization, with ethylenically unsaturated compounds on exposure to actinic radiation (radiation-curing groups), C) optionally NCO-reactive compounds other than B), in the presence of D) a catalyst containing at least one zinc compound, to form allophanate groups by opening the uretdione ring. The present invention also relates to the binders obtained by the process of the invention and to coating compositions containing these binders.

Abstract: The invention relates to a process for preparing binders which contain 1) allophanate groups, 2) groups that react with ethylenically unsaturated compounds with polymerization on exposure to actinic radiation (radiation-curing groups) and 3) optionally NCO-reactive groups, by reacting at temperatures ?130° C. A) one or more NCO-functional compounds containing uretdione groups with B) one or more compounds that contain isocyanate-reactive groups and groups that react with ethylenically unsaturated compounds with polymerization on exposure to actinic radiation (radiation-curing groups), and then C) with one or more saturated, hydroxyl-containing compounds other than B), at least one of these compounds having an OH functionality of ?2, in the presence of D) a catalyst containing one or more zinc compounds, the reaction with compounds C) taking place at least proportionally with the formation of allophanate groups. The present invention also relates to the binders obtained by the process of the invention.

Abstract: Aqueous coating compositions based on polyurethane dispersions which cure under the influence of high-energy radiation, to a process for preparing them and to their use. The coating compositions contain a polyisocyanate, a polyurethane containing free-radically polymerizable groups, and an initiator which is capable of initiating a free-radical polymerization.

Abstract: A process for preparing binders containing allophanate groups which contain, at the oxygen atom of the allophanate group that is bonded via two single bonds, organic radicals with activated groups capable of participating in a polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation; the process includes reacting A) one or more compounds containing uretdione groups with B) one or more OH-functional compounds which contain groups capable of participating in a polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation, and C) optionally further NCO-reactive compounds, and D) in the presence of one or more compounds containing phenoxide groups, as catalysts. The binders can be used in preparing coatings, coating materials, coating compositions, adhesives, printing inks, casting resins, dental compounds, sizes, photoresists, stereolithography systems, resins for composite materials and sealants.

Abstract: Process for preparing binders including reacting A) one or more NCO-functional compounds containing uretdione groups with B) one or more compounds containing groups capable of participating in polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation, and contain isocyanate-reactive groups, followed by C) reaction with one or more hydroxyl-containing compounds other than B), wherein at least one of these compounds has an OH functionality of ?2, D) in the presence of one or more compounds containing phenoxide groups, as catalysts, and E) optionally auxiliaries and additives, where the reaction with compounds of component C) proceeds at least proportionally with the formation of allophanate groups and where and including binders containing allophanate groups and groups capable of participating in a polymerization reaction with ethylenically unsaturated compounds on exposure to actinic radiation, and optionally also contain NCO-reactive groups.

Abstract: Powder coating binders having a glass temperature of ?35° C. containing at least one polymer and one or more radiation-curing reactive thinners, a process for the production of these powder coating binders and their use as a component of powder coatings.

Abstract: Quick-drying, solvent-based coating compositions, which are curable by UV-A radiation and contain at least one amorphous polyurethane with a glass transition temperature of from 35° C. to 100° C., the proportion by weight of soft groups in said amorphous polyurethane being less than 30 wt. %. The compositions are prepared by mixing all of the components that are free of isocyanate groups, and mixing in the components that contain free isocyanate groups just before application to a substrate.

Abstract: A process for the preparation of dual-cure hardeners, coating systems which contain these hardeners, and the use of these coating systems, as well as substrates coated with these coating agents. The dual-cure hardeners are prepared by reacting at least one diisocyanate or polyisocyanate A with the product B of the reaction of B1 acrylic acid, methacrylic acid and/or dimeric acrylic acid with B2 glycidyl methacrylate and/or glycidyl acrylate, wherein B contains less than 0.2 wt.

Abstract: The present invention relates to a process for process for preparing a coating by a) applying to a porous and/or absorbent substrate a liquid coating composition containing at least one component having (meth)acryloyl groups and a dynamic viscosity of less than 2000 mPa.s and 0.1 to 10 wt. %, based on the non-volatile content of the coating composition, of an additive selected from polyamides, oligomeric fatty acid amides and polymeric fatty acid amides and b) polymerizing the composition with radiation. The present invention also relates to the resulting coated substrates and to the coating compositions used in the process.

Abstract: Solvent-based, dual cure coatings incorporating thermally curable blocked polyisocyanates, which also contain unsaturated linkages, and a method for preparing these coatings. The unsaturated linkages, such as acrylate groups, can be crosslinked by free-radical mechanisms such as UV curing.

Abstract: The present invention relates to novel radiation-curing powder coating binders containing maleic and/or fumaric acid esters and one or more amorphous or partially crystalline resins containing at least one group that reacts with ethylenically unsaturated compounds under the action of actinic radiation to form a polymer. The binders have a glass transition temperature ranging from 30 to 90° C. The binders can be used as a constituent in coating compositions.

Abstract: A process for the solventless preparation of ethylenically unsaturated polyurethanes. The process includes preparing a prepolymer from an isocyanate-containing component A) and an isocyanate-reactive component B) in a batch reaction, and reacting the prepolymer with a further component C) in a second, continuous reaction to provide a polyurethane, where at least one of the components A, B and C have ethylenically unsaturated groups.