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 present invention relates to a method for producing a polyester polyol having a concentration of ether groups in the range from 9.0 mol/kg of polyester polyol to 22 mol/kg polyester polyol, characterized in that (i) in a first step (A) isophthalic acid, optionally in the form of a C1-C4 alkyl ester, and/or terephthalic acid, optionally in the form of a C1-C4 alkyl ester, is reacted with (B) oligoethylene glycol of the formula H—(OCH2CH2)n—OH having a numerical average number of oxyethylene groups n in the range from 3.0 to 9.0, in the presence of at least one catalyst selected from the group made up of tin(II) salts, bismuth(II) salts, and titanium tetraalkoxylates, at a temperature in the range from 160° C. to 240° C.

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: 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 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: The present invention relates to aqueous polyurethane urea dispersions having integral functional groups and coating agents produced therefrom, to a method for the production thereof, and to the use thereof for producing coating agents.

Abstract: The invention relates to new, hydrolysis-stable, aqueous polyurethane-polyurea dispersions based on polycarbonate-polyols, to a process for preparing them and to their use in coating materials.

Abstract: Moldings obtainable from compositions comprising A) from 99.91 to 85% by weight of thermoplastic and B) from 0.09 to 15% by weight of multiwall carbon nanotubes, which have a 20° gloss level of from 104 to 20 and a 60° gloss level of from 103 to 50, measured to ISO 2813 using a Byk-Gardner haze-gloss device, and the use of the compositions for the production of moldings with these gloss levels.

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: Polyester polyols are produced from at least one carboxylic acid hydride and diethylene glycol by a process in which the formation of 1,4-dioxane is suppressed. These polyester polyols are useful for producing polyurethane (PUR) and polyisocyanurate (PIR) foams and metal composite elements containing these PUR or PIR foams.

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 a process for the production of non-swellable phyllosilicate tactoids, comprising A) producing a synthetic smectite of the formula I in a high-temperature-melt synthesis [Mn/Valenz]inter[MImMIIo]oct [MIII4]tet X10Y2??(I) B) if the interlayer cation M does not already have a hydration enthalpy from ?6282 to ?406 [kJ/mol], exchanging the interlayer cation M with a cation having a hydration enthalpy from ?6282 to ?406 [kJ/mol] by a cation-exchange method, C) dispersing phyllosilicate in an aqueous system, and D) exchanging M with a cation having a hydration enthalpy from ?405 to 0 [kJ/mol], by a cation-exchange method.

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.

Abstract: Copolycarbonates comprising alkylphenolchain terminator groups for adjusting the molecular weight, compositions of these copolycarbonates with additives chosen from the group of heat stabilizers and mold release agents, the use thereof for the production of moldings and moldings obtained therefrom.

Abstract: The present invention relates to flameproofed, impact-modified, scratch-resistant polycarbonate (PC) compositions and moulding compositions with surface-modified, calcined kaolin as filler, which have good mechanical properties, good flowability and high chemical resistance. Furthermore, the present application relates to the use of the compositions for the production of mouldings.

Abstract: An electrode material, an electrode and a process for hydrogen chloride electrolysis based on platinum metal as catalyst, in which the electrode material has a nanosize mixture of platinum particles and silver particles, is described.

Abstract: Processes for preparing polyurethane hydrogels which include free-radically cross-linking: A) hydrophilic polyurethanes having one or more olefinically unsaturated groups selected from the group consisting of acrylate and methacrylate groups; in the presence of B) water; and C) a redox system including a water-soluble oxidizing agent and a water-soluble reducing agent, the oxidizing agent being capable in terms of redox potential of reacting with the water-soluble reducing agent by free-radical formation, wherein the hydrophilic polyurethanes are based on hydroxyl-functional polyalkylene oxides.