Abstract: The invention relates to a method for producing a security and/or valuable document containing a polymer layer composite or consisting thereof, said polymer layer composite being formed from a polymer layer partial composite and a polymer cover layer and the polymer layer partial composite and/or the polymer cover layer containing a laser sensitive component, consisting of the followings steps: A) first personalized information is applied to the polymer layer partial composite by means of an inkjet printing method as a colored inkjet printed layer, B) the polymer cover layer is applied to the inkjet printed layer and is joined to the polymer layer partial composite by thermal lamination, and C) second personalized information is inscribed into the polymer layer composite of the security and/or valuable document, obtained in step B), by means of laser engraving. The invention also relates to a security and/or valuable document that can be produced according to said method.

Abstract: The invention relates to a method for producing a thermoplastic polyurethane elastomer, comprising the reaction of at least A) one organic diisocyanate containing two isocyanate groups with B) a polyol having a number-average molecular weight Mn>=500 and <=5000 g/mol, which has at least two isocyanate-reactive groups, and C) one or more chain extenders having a molecular weight >=60 and <=490 g/mol, which have two isocyanate-reactive groups, and optionally D) a monofunctional chain stopper, which has one isocyanate-reactive group, and/or E) a catalyst, wherein the molar ratio of the isocyanate groups from A) to the sum of the groups reactive to isocyanate in B), C), and, if applicable, D) is >=0.9:1 and <=1.2:1, and component B) contains at least one polyether carbonate polyol, which can be obtained by adding carbon dioxide and alkylene oxides to H-functional starter substances.

Abstract: In a process for chlorine-alkali electrolysis, use is made of an oxygen depletion cathode. The process is run with a high excess of oxygen. The oxygen needed for this is provided for a device of the gas separation, for example a VPSA plant or an air fractionation plant. The large quantities of oxygen produced lead to considerable costs of the process. According to the invention, the oxygen-rich atmosphere remaining after passing through the process is fed back into the device for gas separation as input gas. The device the gas separation is therefore operated with an oxygen-rich input gas and therefore produces a larger quantity of oxygen-rich gas, which in turn is fed to the oxygen depletion cathode. As a result of the circulation of the gas, the economy of the overall process is increased considerably.

Abstract: Disclosed are random copoly(phosphonate carbonate)s with the high molecular weight and narrow molecular weight distribution exhibiting a superior combination of properties compared to prior art.

Abstract: The invention relates to a method for making a structure with at least a first polymer layer and a second polymer layer, each made from a polycarbonate polymer based on bisphenol A, between the polymer layers a component being arranged, comprising the following steps: a) the component is arranged on the first polymer layer or placed in a depression of the first polymer layer, b) the first polymer layer is coated on the side, on which or in which the component is arranged, at least in the region of the component with a liquid preparation comprising a solvent or a mixture of solvents and a polycarbonate derivative based on a geminally disubstituted dihydroxydiphenyl cycloalkane, c) optionally a drying step is made after step b), d) after step b) or step c), the second polymer layer is placed on the first polymer layer, covering the component, e) the first polymer layer and the second polymer layer are laminated with each other under pressure, at a temperature from 120° C. to 180° C. and for a defined time.

Abstract: The present invention relates to an aromatic branched polycarbonate, produced via melt transesterification of a bisphenol with a diaryl carbonate in the presence of a branching agent, wherein the aromatic branched polycarbonate comprises branching point structures and structures of formula (D) wherein X is a single bond, C1- to C6-alkylene, C2- to C5-alkylidene or C5- to C6-cycloalkylidene, optionally substituted by C1- to C6-alkyl; wherein the amount of D in the aromatic branched polycarbonate is in the range of from 5 to 450 mg per kg of the aromatic branched polycarbonate; and wherein the ratio of the total branching point structures to the total structures of the formula D in the aromatic branched polycarbonate is in the range of from 8 to 200.

Abstract: In the production of a document, image information is incorporated into a plurality of layers of the document such that the pieces of image information are combined into a total image. The image information in at least two of the layers includes digital watermark information. The entirety of the digital watermark information in the at least two layers forms a security feature for an authentication of the document. The invention further relates to a respective document, a method for authentication, and a device for authentication.

Abstract: The present disclosure relates to a method for producing composite materials containing as a first layer a foamed thermoplastic support and as a second layer polyurethane (PU), the resulting composite materials being characterized by improved foam adhesion, wherein (i) a foamed polycarbonate molding composition is produced by injection molding using chemical or physical foaming techniques, and (ii) the polyurethane reaction system is applied on top and allowed to cure. The disclosure also provides the composite systems produced by this method and their use as a component, in particular in the automotive sector.

Abstract: Disclosed are random copoly(phosphonate carbonate)s with the high molecular weight and narrow molecular weight distribution exhibiting a superior combination of properties compared to prior art.

Abstract: A method for separating electrolyte-containing water from an organic phase by means of permeation on a hydrophobic separating means. The permeated organic solution is substantially depleted in water and the retained water is enriched with electrolytes.

Abstract: The invention relates to a method for improving the performance of nickel electrodes in alkali chloride electrolysis by adding water-soluble platinum compounds to the catolyte.

Abstract: The invention relates to a device for machine-based processing of rapid polymeric reaction systems, particularly polyurethane systems, wherein a rapid formula change is possible with simultaneously low raw material consumption. The device according to the invention further requires little space, allowing for operation in a standing flue, for example.

Abstract: The present invention deals with a methodology of incorporating carbon nanotubes (CNTs) into an epoxy matrix and thereby producing epoxy-based CNT nanocomposites. Both the pristine and ozonized CNTs are almost homogeneously dispersed into the resin by this approach. Compared with the pristine CNTs (p-MWCNTs), the ozonized ones (f-MWCNTs) offer considerable improvements on mechanical properties within the epoxy resin.

Abstract: The invention relates to an apparatus and a process for devolatilizing solvent-containing polycarbonate solutions. By employing the inventive apparatus, polycarbonates with low residual values of volatile constituents are produced from solvent-containing polymer melts, which improved optical properties, especially yellowness index, with the aid of an apparatus combination of a flash devolatilizer and a vented extruder.

Abstract: The invention relates to coating systems for producing fast-drying flexible coatings which are based on aromatic allophanate group-containing prepolymers and aliphatic polyisocyanates and aminofunctional polyaspartic esters as the curing agents.

Abstract: A compounding process is disclosed. The process includes (i) melt blending in an extruder at least two polymeric resins to produce a mixture that includes at least one resin that dissociates to yield monomers and/or oligomers upon heating, said mixture containing less than 1 percent of volatile components, (ii) introducing into said extruder an inert entraining agent, and (iii) removing said entraining agent together with said volatile components from said extruder. The extruder includes at least one melting zone, at least two degassing zones and at least one mixing zone. The end product has a particularly low content of residual solvent and at the same time a low content of monomers or oligomers.

Abstract: The present invention relates to an aqueous polyurethane urea dispersion comprising a polyurethane urea polymer comprising structural units of the formula (I) wherein Aromat represents a compound selected from the group consisting of phenylene, tolylene, xylylene, tetramethylxylylene and diphenylenemethane, and wherein the polyurethane urea is obtained from components comprising A) at least one aromatic diisocyanate, B) at least one polyether polyol having a number-average molecular weight of from 300 to 1500 Da, C) at least one compound having one to two isocyanate-reactive groups and at least one ionogenic group, D) at least one polyol having a number-average molecular weight of from 60 to 499 Da, and E) water, wherein the average overall functionality of compounds B) to D) is from 1.85 to 2.2 and wherein the sum of the amount of aromatic urea groups and the amount of urethane groups is 2700 to 5000 mmol per kg polyurethane urea polymer.

Abstract: The present invention relates to the use of a plastic film as a printable medium in colour laser printing, to special plastic films for use in colour laser printing, and to their application in the production of security documents or valuable documents and plastic mouldings.

Abstract: The invention relates to layer structures for ID cards on which information can be written by laser engraving and which have an additional layer that is applied to the card body after the laser engraving and restricts or completely prevents subsequent writing on the card by means of laser engraving, and consequently prevents falsification of the identifying information contained, and relates to a method for blocking the laser engraving writability of layer structures on which information can be written by laser engraving.

Abstract: The present invention relates to a laminar structure comprising: a first layer comprising a first plastic film which comprises a thermoplastic and a filler and a second plastic film comprising a thermoplastic and a filler; a second layer comprising a third plastic film which comprises a thermoplastic and a filler and a second plastic film comprising a thermoplastic and a filler; and a laser printed watermark disposed on at least one of the plastic films positioned between the first and second layers.