Abstract: The invention relates to a method for recovering a diisocyanate which is solid at room temperature from a distillation residue from a process for producing the diisocyanate, comprising the following steps: (i) mixing the distillation residue with a bitumen such that a mixture is obtained which contains 70 to 90 wt % of the distillation residue and 10 to 30 wt % of the bitumen, each in relation to the mixture, (ii) distilling the mixture in a thin-film evaporator or a falling film evaporator to obtain a sump discharge and a gaseous product stream, (iii) condensing the gaseous product stream and obtaining a solid containing the diisocyanate which is solid at room temperature. The invention further relates to the use of a thin-film evaporator or falling film evaporator, to a composition containing the diisocyanate which is solid at room temperature, and to a method for producing an elastomer from this composition and to the elastomer itself.

Abstract: A drug injection device consists of a body, a cap, a striker, a spin wheel, a button, a spring, an ampoule, and optionally a needle. Each of the body, the cap, the striker, the spin wheel and the button is a molded plastic part, made out of mostly polycarbonate, which slide, snap, screw or rest in place, without the use of adhesives or fasteners. Also disclosed is a system for recycling a drug injection device having molded plastic parts made from mostly polycarbonates, comprising disassembling the drug injection device, separating the molded plastic parts from all other parts, and reprocessing the molded plastic parts together into recycled resin, which may be through regrinding, melting, and pelletizing.

Abstract: A process for purifying nitrobenzene-contaminated wastewater stream WW1 includes stripping WW1 with stripping gas SG1 in a stripping column to obtain wastewater stream WW2 containing reduced concentration of nitrobenzene relative to WW1 (cNB,WW2), and purifying WW2 in a wastewater treatment plant, wherein a target value (cNB,WW2,TARGET) is specified for the nitrobenzene concentration in WW2. A set of linear mathematical relationships is stored in a database for a combination of boundary conditions of nitrobenzene concentration in WW1, temperature of WW1, and temperature of SG1. This set defines a range of concentrations of nitrobenzene in WW2 and includes a mathematical relationship corresponding to cNB,WW2,TARGET, a mathematical relationship for a value of cNB,WW2 corresponding to 98% of cNB,WW2,TARGET, and a linear mathematical relationship for a value of cNB,WW2 corresponding to 102% of cNB,WW2,TARGET. The concentration of nitrobenzene is controlled in WW2 (cNB,WW2) by adjusting the flow rate of SG1.

Abstract: The invention relates to the use of a separating medium, containing at least one essential oil or consisting of at least one essential oil, selected from the group consisting of phenols, phenylpropanoids and furanocoumarins, for separating at least two joining parts which are joined by means of an adhesive bond.

Abstract: The invention is related to a layered structure with at least one layer a. of a material with a VST?85° C. comprising at least one cutting line b. reaching through the whole thickness of the layered structure surrounding at least one first portion which is extractable and reinsertable manually from the layered structure as well as a production process for such a layered structure.

Abstract: The present invention relates to a method for continuously operating a distillation column, which is designed to separate a mixture S, which contains essentially a substance A and a substance B, which boils significantly higher than substance A. In the method according to the invention, the reflux ratio is changed according to the feed flow and, at the same time, the energy input by means of the heat-transfer medium is changed proactively (so-called feed-forward control) by accounting for the feed flow by means of feed-forward control. At the same time, the bottom temperature is observed and the control structure is changed if the bottom temperature falls too far when the heat-transfer medium is reduced by means of the feed flow.

Abstract: The present invention relates to a housing for a multifunctional electronic device and a method for preparing the same. The housing comprises an upper cover and a lower cover fixed together to form an internal space, wherein the upper cover comprises a first layer formed of a first thermoplastic material, said first layer having a thickness in the range of 0.8 mm to 1.5 mm and comprising at least two functional components integrated thereon; the lower cover comprises a second layer formed of a second thermoplastic material, said second layer having a thickness in the range of 2 mm to 4 mm; and the housing for the multifunctional electronic device comprises at least 90 wt % of the thermoplastic materials, relative to the total weight of the housing.

Abstract: The present application relates to a heat-resistant semi-conductive thermoplastic resin composition and shaped articles made therefrom. The thermoplastic resin composition comprises the following components: an aromatic polycarbonate, a polyalkylene terephthalate, a conductive carbon black and a reinforcement material. The shaped article made from the thermoplastic resin composition according to the present invention has a good combination of heat-resistance, semi-conductivity and dimensional stability.

Abstract: The invention relates to polycarbodiimides and to a process for their preparation using special catalysts.

Abstract: The invention relates to a method for separating waste polyurethane foams, wherein for each polyurethane sample (1) of a supply stream (2) comprising polyurethane samples (1) from waste at least one respective spectrum (3) is recorded, wherein the at least one respective spectrum (3) is recorded by near-infrared spectroscopy, wherein each polyurethane sample (1) of the supply stream (2) is classified by a classification algorithm (5), which classification algorithm (5) is based on machine learning, based on the respective at least one spectrum (3) into a respective class (8a-e) of at least two classes (8a-e), wherein the supply stream (2) comprising polyurethane samples (1) is separated into at least two streams (11a-e) according to the classification into the respective class (8a-e) and wherein each class (8a-e) corresponds to a type of polyurethane. The invention also relates to a system for separating waste polyurethane foams.

Abstract: The invention relates to a multilayer body comprising at least one substrate layer, a metal layer bonded directly thereto and optionally at least one protective layer atop the metal layer, wherein the substrate layer comprises a composition which is obtained by mixing polycarbonate, talc and a specific wax. It was shown that the multilayer bodies obtained are particularly suitable for use as reflectors and (housing) components for light sources and heat sources and displays.

Abstract: The invention relates to a process for preparing isohexide diamines from isohexide diols, including the following steps: a) reacting at least one isohexide diol to give at least one suitably substituted derivative, b) aminating the at least one suitably substituted derivative from step a) to give a reaction product mixture, c) fractionating the reaction product mixture from step b) to give a substantially bis-aminated isohexide-containing product, d) deprotecting the substantially bis-aminated isohexide-containing product purified in step c), to give an isohexide diamine, and e) purifying the isohexide diamine from step d) to give a purified isohexide diamine, with step c) being carried out before step d).

Abstract: Multilayer composite material comprising specific polycarbonate compositions as matrix material The present invention relates to a composite material comprising one or more fibre layers composed of a fibre material and an aromatic polycarbonate-based matrix material. The fibre layer(s) is/are embedded in the matrix material. The present invention further relates to a process for producing these fibre composite materials, to multilayer composite materials comprising several layers of fibre composite material, and to the use of the composite materials for production of components or housing components or housings, and to the components, housing components or housings themselves.

Abstract: The invention relates to the use of mixtures of water and essential oils selected from the group consisting of phenols, phenylpropanoids and furanocoumarins, for separating multilayered composites for the segregated recycling of polymer/metal films.

Abstract: The present invention relates to a method for producing a double metal cyanide (DMC) catalyst, comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand, optionally a complex-forming component to form a dispersion, the dispersion being produced using a mixing nozzle and a peroxide. The invention further relates to double metal cyanide (DMC) catalysts obtainable by means of the method according to the invention and to the use of DMC catalysts to produce polyoxyalkylene polyols.

Abstract: The invention relates to a method for the production of foamed areal polyurethane(PUR)/polyisocyanurate(PIR) moldings, where a polyurethane/polyisocyanurate reaction mixture is injected into a mold that is under elevated pressure and then a depressurization takes place, and the foaming process is thus induced, and after the reaction the molding is demolded, and to a mold for carrying out the method.

Abstract: The present invention relates to novel high-value polycarbonate polyols, to processes for the production thereof, to polyisocyanate prepolymers obtainable therefrom and also polyurethane (PUR) and polyurethane urea elastomers which under particularly demanding applications show unique combinations of processing characteristics, hydrolysis and oxidation stability, mechanical and dynamic mechanical properties.

Abstract: The invention relates to a method for producing soft polyurethane foam obtained by reacting a composition containing a component A1 containing at least one filled polyol, a component A2 containing compounds reactive with isocyanates and having a hydroxyl value of ?20 to <100 mg KOH/g, the component A2 not containing any filled polyol, a component A3 containing water and/or at least one physical blowing agent, a component A4 containing auxiliary agents and additives, and a component B containing di- and/or polyisocyanates, characterized in that the reaction occurs in the presence of 0.5 to 3 parts by weight of an organic urea derivative as component C, which is obtained by reacting urea with a difunctional amine having a number-average molecular weight of 200 to 1000 g/mol. The invention also relates to a soft polyurethane foam obtainable by the method.

Abstract: The invention relates to a multiple-chamber container (1, 1*) for storing and mixing a multi-component liquid coating or adhesive system (M), comprising a first chamber (10) for a first mixing component (B) and at least one other chamber (20) for another mixing component (H), the first chamber (10) and the at least one other chamber (20) being separated by at least one separating wall (30) in liquid-tight fashion and the separating wall (30) comprising a pierceable separating layer (40). The multiple-chamber container further comprises at least one piercing element (50) for piercing the pierceable separating layer (40) in such a way that the first and the one other mixing component (B, H) mix in the first or the at least one other chamber (10, 20). The multiple-chamber container (1, 1*) is characterized in that the at least one other chamber (20) is coaxial to the first chamber (10), the separating layer (40) being partially formed in the separating wall (30).