Abstract: A reactive melt adhesive containing 30 to 70% of at least one prepolymer having at least two isocyanate groups having a molecular weight below 6000 g/mol, manufactured from polyether polyols and/or polyester polyols reacted with a molar excess of diisocyanates, the prepolymer containing less than 1% monomeric diisocyanate; 30 to 70 wt % of a thermoplastic polyester having a number-average molecular weight (MN) below 6000 g/mol, which comprises fewer than 1.4 groups reactive with NCO; and up to 30 wt % additives from the group of the catalysts, resins, plasticizers, fillers, pigments, stabilizers, or adhesion promoters.

Abstract: Polyether block copolymers of the general structure B-(A-OH)n are described, where n is greater than or equal to 2 and blocks A are made up of polyoxypropylene units and the central block B of polyoxytetramethylene, polyoxyethylene, polybutadiene, polyisoprene, polyacrylate, polymethacrylate, polyamide, polyurethane, or polyester units. These polyether block copolymers are suitable for the manufacture of compositions that serve as the basis for preparations for use as a one-component moisture-hardening or two-component adhesive or sealant, for assembly bonding, for areal bonding, and/or for coating, as a reactive melt adhesive or as a laminating adhesive.

Abstract: A multi-gas microsensor assembly for simultaneously detecting carbon dioxide and oxygen in real time. According to one embodiment, the assembly comprises a non-conductive, solid substrate. A plurality of sensing electrodes, a single reference electrode, and a single counter electrode are positioned on one side of the non-conductive, solid substrate. In addition, all of the electrodes are in intimate contact with the same side of a solid-polymer electrolyte anion-exchange membrane, the solid polymer electrolyte membrane having at least one gas diffusion opening aligned with each sensing electrode. The sensor is operated in a three-electrode potentiostatic mode, in which a constant potential is maintained between the sensing and reference electrodes, and the current is measured between the sensing and counter electrodes. Control of the electrodes is achieved with a small bi-potentiostat.

Abstract: A crosslinkable foamable composition with low content of monomeric isocyanates comprising a) 10 to 90 wt % of a prepolymer of polyester diols reacted with an excess of diisocyanates and subsequent removal of the excess monomeric diisocyanate, b) 90 to 10 wt % of a component based on polyether polyols which possesses at least one Si(OR)3 group or at least one NCO group, c) 0.1 to 30 wt % additives, d) and at least one blowing agent, wherein the polyester diols and the polyether diols have a molecular mass (MN) below 5000 g/mol and the mixture of a and b comprises a content of monomeric diisocyanates below 2 wt %.

Abstract: The present invention relates to the use of enzymes and/or whole-cell catalysts for the removal of undesired by-products from crosslinkable preparations.

Abstract: According to some embodiments, data may be received from a plurality of remote data sources. The received data may be, for example, associated with a plurality of social and traditional media sources. The received data may be aggregated based on an association with an entity and stored. At least two superimposed graphs may then be automatically provided on a user display, including (i) a first graph having an x-axis representing time and a y-axis representing an amount of social networking activity in the aggregated data and (ii) a second graph having an x-axis shared with the first graph and a y-axis representing a financial value associated with the entity.

Abstract: A multi-gas microsensor assembly for simultaneously detecting carbon dioxide and oxygen in real time. According to one embodiment, the assembly comprises a non-conductive, solid substrate. A plurality of sensing electrodes, a single reference electrode, and a single counter electrode are positioned on one side of the non-conductive, solid substrate. In addition, all of the electrodes are in intimate contact with the same side of a solid-polymer electrolyte anion-exchange membrane, the solid polymer electrolyte membrane having at least one gas diffusion opening aligned with each sensing electrode. The sensor is operated in a three-electrode potentiostatic mode, in which a constant potential is maintained between the sensing and reference electrodes, and the current is measured between the sensing and counter electrodes. Control of the electrodes is achieved with a small bi-potentiostat.

Abstract: The present invention relates to the use of enzymes and/or whole-cell catalysts for the removal of undesired by-products from crosslinkable preparations.

Abstract: A film containing a polymer such as polyvinyl chloride is rapidly and reliably bonded to a molding containing a polymer, wood or aluminum using a hot-melt adhesive by thermally activating the film by heating using electromagnetic radiation.

Abstract: One-component moisture-curing hot melt adhesive compositions based on reaction products from di- or polyisocyanates and polyether-polyols, crystalline or partly crystalline polyester-polyols and low molecular weight polymers from olefinically unsaturated monomers and optionally hydroxylated tackifying resins are suitable for high-strength and ageing-resistant gluing of profiles of plastics to one- or multilayer acrylate films.

Abstract: A moisture-curing hot-melt-adhesive composition in granulate, tablet or powder form can be produced by a.) fusing the reactive hot-melt-adhesive composition and heating the melt, subject to exclusion of moisture, b.) extruding this melt through one or more dies onto a cooled surface, subject to exclusion of moisture, c.) cooling the granulate, subject to exclusion of moisture, whereby the composition solidifies, d.) removing the cooled hot-melt-adhesive granulate, e.) filling the granulate into moisture-tight packages, subject to exclusion of moisture. These reactive hot-melt adhesives are pourable and free-flowing and therefore can be used with all conventional application machines for hot-melt adhesives.

Abstract: Polyurethane compositions are produced in a two-stage method. In a first step, a diol component with a molecular weight of less than 2000 is reacted with a monomeric diisocyanate with a molecular weight of less than 500 and the unreacted monomeric diisocyanate is removed from this reaction product. In a second step, the resulting high-molecular diisocyanate is reacted with a polyol to produce a reactive prepolymer with isocyanate and groups. The addition of polyisocyanates which are capable of migration and which have a substantially lower vapor pressure than diphenylmethanediisocyanate, improves the addition behavior of the invention polyurethane compositions. Reactive polyurethane compositions of this type are suitable for using as binding agents for reactive one or two component adhesives/sealants, which may optionally contain solvents. These compositions are also suitable for producing reactive hot melt adhesives when suitable polyols are selected.

Abstract: Reactive adhesives are prepared based on polyurethane compositions obtained by reacting at least one type of polyol with at least one type of diisocyanate containing at least 80 percent by weight 2,4?-diphenylmethane diisocyanate. Such adhesives are applied to a surface to be glued of at least one substrate, thermally reactivated separately in time and/or space from application of the adhesive, and then used to join together the substrates to be adhered to each other.

Abstract: A process for the production of a polyurethane hot-melt adhesive based on grafted polyester-polyether block copolymers with grafted-on hydroxyl groups and the reaction thereof with a stoichiometric excess of a polyisocyanate and the optional mixing thereof with further pre-polymers based on polyether polyols and polyester polyols is disclosed. By this process, the polyester-polyether block copolymers are firmly incorporated into the polyurethane matrix on curing, so that they are migration-proof. Highly-elastic hot-melt adhesives result, which, with optional foaming, are also suitable for the production of elastic seals.

Abstract: A reactive hotmelt adhesive is prepared which contains a reaction product of a stoichiometric excess of a polyisocyanate with a hydroxyl-functional polyester-ether block copolymer based on aromatic dicarboxylic acids. The adhesive additionally contains a reaction product of a polyisocyanate and at least one of either a polyether polyol or a polyester polyol. A thermoplastic polymer may also be present.

Abstract: A process for the production of a polyurethane hot-melt adhesive based on grafted polyester-polyether block copolymers with grafted-on hydroxyl groups and the reaction thereof with a stoichiometric excess of a polyisocyanate and the optional mixing thereof with further pre-polymers based on polyether polyols and polyester polyols is disclosed. By this process, the polyester-polyether block copolymers are firmly incorporated into the polyurethane matrix on curing, so that they are migration-proof. Highly-elastic hot-melt adhesives result, which, with optional foaming, are also suitable for the production of elastic seals.

Abstract: The present invention relates to compositions comprising reaction products of a polyisocyanate with a polyester block copolymer and a process for the preparation thereof. These are suitable as a moisture-curing hot melt adhesive. The hot melt adhesive composition may optionally also comprise a reaction product of a polyisocyanate with a polyester polyol and/or a reaction product of a polyisocyanate with a polyether polyol. Such polyurethane hot melt adhesive compositions have good creep resistance and interfacial adhesion values on plastics and show very high strength values.

Abstract: Isocyanato-functional silanes prepared by reacting aliphatic or cycloaliphatic polyisocyanates of low volatility with organofunctional silanes containing NCO-reactive groups are useful as adhesion promoters in polyurethane adhesives and sealants.

Abstract: One-component moisture-curing hot melt adhesive compositions based on reaction products from di- or polyisocyanates and polyether-polyols, crystalline or partly crystalline polyester-polyols and low molecular weight polymers from olefinically unsaturated monomers and optionally hydroxylated tackifying resins are suitable for high-strength and ageing-resistant gluing of profiles of plastics to one- or multilayer acrylate films

Abstract: The present invention describes reaction products from 2,4?-diphenylmethane diisocyanate with a content of at least 95 wt. % of 2,4? isomer with at least one polyether-polyol and/or polyalkylene glycol with a molecular weight of less than 1,000 and/or one crystalline or partly crystalline or vitreously amorphous polyester-polyol and optionally polyester-polyols and/or polyether-polyols which are liquid at room temperature and have molecular weights of greater than 1,000 can be converted into adhesive compositions which have a very low content of monomeric diisocyanate of less than 0.5, preferably less than 0.25 wt. %. Such hot melt adhesive compositions have a high melt stability and a low viscosity, in addition to the low content of monomeric diisocyanate.