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: In an apparatus in spinning preparation for separating foreign objects at a roll for opening or doffing fibre material, at least one device for separating the foreign objects is associated with a face of the roll. That device comprises an arrangement for producing a current of blast air flowing onto the face for detaching the foreign objects and carrying them away. The arrangement comprises a plurality of blast nozzles arranged across the width of the roll. To permit separation and allow rapid changes of the action of the blast air current, a bar for mounting the blast nozzles is present and the outlet of the blast nozzles is locally displaceable in relation to the face of the roll.

Abstract: In an apparatus in spinning preparation for separating foreign objects at conveying equipment for fibre material, at least one separation device is associated with the conveying equipment. The separation device comprises an arrangement for producing a blast of air that flows in the direction onto the conveying equipment and generates an air flow that detaches the foreign objects from the conveyed fibres and carries them away. The arrangement comprises a plurality of blast nozzles arranged across the width of the conveying equipment and connected to a compressed air pipe and to valves. To reduce the proportion of good fibres in the waste in a simple manner, and to allow a more selective action of the blast air current, a bar member for mounting the blast nozzles is present and the nozzles are integrated in the bar member.

Abstract: The present invention relates to a process for preparing compounds which contain allophanate groups, free NCO groups and polyortho ester groups by reacting A) one or more aliphatic and/or cycloaliphatic polyisocyanates with B) one or more polyortho esters containing at least one hydroxyl group per molecule to form NCO-functional polyurethanes and then reacting some or all of the urethane groups to form allophanate groups. The present invention relates to compounds obtained by this process and to their use as binders in coating, sealant and adhesive compositions that also contain catalysts and optionally additives.

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 D) a catalyst containing at least one tetrasubstituted ammonium or phosphonium salt of an aliphatic or cycloaliphatic carboxylic acid, to form allophanate groups by opening the uretdione ring. The present invention also relates to the binders obtained by the process of the invention.

Abstract: The present invention relates to two-component coating systems for the production of polyurea coatings containing A) a sulfonate group-containing polyisocyanate and B) an amino-functional polyaspartate corresponding to formula (I) wherein X represents the n-valent organic group obtained by removing the primary amino groups from an n-valent polyamine, R1, R2 represent the same or different organic groups, which are inert to isocyanate groups under the reaction conditions, and n represents an integer of at least 2. The present invention also relates to coatings obtained from these coating systems.

Abstract: In an apparatus in spinning preparation for feeding a plurality of charging shafts 2 to 6, especially a mixer 1, with fibre material that is transported for example pneumatically in a supply channel 8 and deflected into the charging shafts by means of deflecting devices, each charging shaft is closable at its upper end by means of a rotary gate 11 which, in its open position, closes off the cross-section of the supply channel. In order to increase the efficiency by means that are simple in terms of construction and, above all, to improve the transmission of the drive movement to the movement of the rotary gate 11, the rotary gate co-operates with a drive element 20; 21; 22; 23; 26 which imparts a rotary movement to the rotating axle of the rotary gate.

Abstract: The present invention relates to polyacrylate-modified polyisocyanates which are i) prepared from aromatic, araliphatic, cycloaliphatic and/or aliphatic polyisocyanates having an NCO content of 5% to 25% by weight, an NCO functionality ?2, a viscosity measured as solvent free resin of 150 to 200,000 mPa·s at 23° C., and ii) contain at least one structural unit of the formula (I) wherein R is hydrogen or a methyl group, R1 is an optionally heteroatom-containing hydrocarbon radical and R2 is a hydrocarbon radical having at least one isocyanate group and optionally urethane, allophanate, biuret, uretdione, isocyanurate and/or iminooxadiazinedione groups and n ist a number ?1. The present invention also relates to a process for preparing these polyisocyanates and to binder compositions containing these polyisocyanates, which may be hydrophilically modified, and a compound having NCO-reactive groups.

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 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: 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: 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: A process for preparing polymers containing polyortho ester groups and optionally NCO groups by reacting A) and B) where A) is a polyortho ester containing at least one isocyanate-reactive group prepared by reacting at least one or more acyclic ortho esters with low molecular weight polyols having a functionality of 4-8 and a number-average molecular weight of 80-500 g/mol and B) is least one polyisocyanate. The polymers obtained from the process can be used to produce coatings, adhesive bonds and/or seals. The coating compositions can include one or more of the above-described polymers, optionally polyisocyanates, catalysts, and optionally auxiliaries and additives and can be used to coat substrates.

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: An impact absorber for decelerating a vehicle impacting on an obstacle, which impact absorber includes two tubes which can be displaced one inside the other in the manner of a telescope. The inner tube is closed off from the outside by a base and has a highly pressurized gas space and a first fluid space. A second fluid space is arranged in the outer tube and is hydraulically connected to the first fluid space via a restriction formed by a restricting aperture in an intermediate wall fixed in the inner tube. The outer tube has, in the end region, a plastic disk which melts at a predetermined temperature and as a result counteracts an explosion of the impact absorber in the event of a fire by reducing the pressure.

Abstract: The invention concerns an optically controlled optical switching module (SM1), as well as a method of optically controlling an optical switching network, and an optical switching network. The optical switching module (SM1) is equipped with at least one optical switch (OCOSW), which is controlled through an optical control input (CONTR), which switches a useful optical signal. The optical switching module (SM1) furthermore has an optical pulse shaper (PW) that is connected to this control input (CONTR), which produces switching pulses that are suitable for the optical switch (OCOSW), from an optical control signal. The optical switching network contains at least one optical switching module (SM1). Control bits from an optical data packet are individually masked out in the optical switching network by means of optical switches (OSW), and the optical control signals corresponding to the respective control bits (CB1 to CB4) are fed to one of the optical pulse shapers (PW).