Abstract: A process for using low-molecular weight compounds that are water-extracted from (co)polyamides in the production of polyamide is disclosed. The process entails reacting these compounds with 10 to 15 wt. % water for a period of 3.5 to 6 hours at a temperature of 220° C. to 270° C., and polymerizing the resulting product along with caprolactam.

Abstract: Transparent moldings comprising a polymeric base material and at least one coating formed thereon is disclosed. The coating includes a primer coat that containing an epoxy and/or acrylic resin is disposed on at least one surface of the base material, a heat-absorbing coating which contains a polythiophene compound and a scratch-resistant coating. In an additional embodiment of the invention, the coating contains no primer and the heat absorbing coating contains a polythiophene compound.

Abstract: The invention relates to rubber compounds comprising at least one double bond-containing rubber, additions of rubber gels, phenolic resin adducts or phenol/formaldehyde condensation products, such as resols or novolaks, and optionally, further fillers and rubber auxiliary substances, and the vulcanizates and molded rubber articles produced from them. The rubber compounds according to the present invention are characterized in the uncrosslinked state by good processability (compound viscosity ML 1+4/100° C.<60 ME) and in the vulcanized state by Shore-A hardness values/23° C.>60, high impact resilience values E/23° C.>60% and a low specific density. The vulcanizates are suitable for the production of industrial rubber articles and for various tire components, such as roll coverings, conveyor belt coverings, belts, spinning cops, seals, golf ball cores, shoe soles and bead compounds, tire carcasses, subtread compounds and tire sidewalls.

Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on and read by means of infrared light, preferably laser light, particularly preferably light having a wavelength in the range 750-800 nm, in particular 770-790 nm, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cobalt(III) phthalocyanine in which the Co metal centre bears two axial substituents R1 and R2 which represent, independently of one another, CN, SCN, alkoxy or alkylthio is used as light-absorbent compound.

Abstract: A thermoplastic molding composition comprising polycarbonate, an impact modifier, a phosphorus-containing flameproofing agent, and high purity talc is disclosed. The composition offers flame resistance for molded parts having small wall thickness, improved rigidity and resistance to stress cracking. The talc has MgO content of 30.5 to 32 wt. %, SiO2 content of 60 to 62.5 wt. % and Al2O3 content lower than 0.7 wt. % and d50 value less than or equal to 2.5 &mgr;m.

Abstract: A brominated butyl rubber and a polymer based on a conjugated diolefin monomer are grafted by mixing the solid polymer at a temperature greater than 50° C. for a time sufficient to cause grafting. The grafted copolymer is useful especially in tire tread compositions.

Abstract: Impact-resistant polycarbonate and/or polyester carbonate compositions containing at least one oxalate compound selected from the group consisting of metal oxalates, metal hydroxy oxalates, oxalic acid esters and metal salts of oxalic acid esters in quantities of 0.1 to 5 parts by weight (based on 100 parts by weight of the total composition) display an advantageous combination of flow line strength and stress-cracking resistance on exposure to chemicals combined with high thermal stability and good processing properties and they are also flame-resistant.

Abstract: A solid and/or cellular polyurethane elastomers which are produced using polyester polyols are disclosed. The elastomers which exhibit improved stability to hydrolysis are characterized in that their preparation is carried out in the presence of at least one esters of monobasic carboxylic acid or polybasic carboxylic acids, the (first) dissociation constant (pK) of which is 0.5 to 4.

Abstract: A spacer profile (3) has two side pads (8) which are provided permanently with a sealing, plastic and elastic material and comprise continuation pads (11). The continuation pads (11) create, at a distance from their adge area (12) connected to a hollow profile, a first bearing point (13) for the individual plates (2), which is preferably in the form of a spacer or a swelling (15), as well as a clearance (14) located between the continuation pad and the individual plate (2) and filled with the sealing material (9). The continuation pads (11) are elastic and exhibit, in their edge area (12) close to the transverse pad (7), a second bearing point (16), which becomes functional when the side plates (2) are subjected to a load in the transverse direction.

Abstract: The use of zwitterionic compounds as mold release agents in thermoplastics is disclosed. Molding compositions having good release properties, preferably compositions containing polycarbonate resins are thus disclosed.

Abstract: Segmented polyurethane/ureas useful in the production of spandex are produced by chain extending an isocyanate-terminated prepolymer with a diamine chain extender that includes: (1) from about 7 to 25 equivalent percent of an asymmetric aliphatic and/or cycloaliphatic diamine and (2) a linear diamine such as ethylene diamine in the presence of a solvent. The isocyanate-terminated prepolymer is produced by reacting a stoichiometric excess of an isocyanate with an isocyanate-reactive component that includes: (1) from about 10 to about 70 equivalent percent of a polyoxypropylene diol having a molecular weight in excess of 1500 Da and an average unsaturation level no greater than about 0.03 meq/g and (2) from about 30 to about 90 equivalent percent of a polytetramethylene ether glycol having a molecular weight of at least 600 Da.

Abstract: A vulcanizate derived from a polymer composition comprising three components exhibits improved hot air aging properties and is useful, for example, for the manufacture of articles subject to dynamic loading, such as belting applications. The first component is a polymer having a main polymer chain derived from: (i) at least about 30% by weight of a first monomer which introduces at least one of a secondary carbon and a tertiary carbon to the backbone, and (ii) from 0 to about 70% by weight of at least one other monomer. Preferred are ethylene-alpha-olefin copolymers. The second component is a salt of a strong base and a weak acid, the salt comprising a metal selected from Group I of the Periodic Table of Elements. The third component is an antioxidant.

Abstract: A process for the production of polymers by means of pseudo-living free-radical polymerization is disclosed. The process entails (i) reacting a polymerizable vinyl monomer with nitrogen monoxide and at least one initiator to prepare a free-radical intermediate product, and (ii) polymerizing the intermediate product optionally together with one or more additional monomers and/or with a free-radical initiator.

Abstract: A method for making a polyaspartic ester mixture in-situ comprising the sequential steps of (a) reacting a cyclic amine with an excess amount of an ester of fumaric or maleic acid to form a mixture containing first polyaspartic ester component and excess unreacted ester of fumaric or maleic acid, and (b) adding an acyclic amine to the mixture resulting from step (a) and reacting the acyclic amine with the excess ester of fumaric or maleic acid to form a second polyaspartic ester component.

Abstract: The present invention relates to a process for the production of a dinitronaphthalene isomer mixture, in which naphthalene and/or 1-nitronaphthalene is reacted with nitric acid in the presence of a zeolite.

Abstract: Substituted and pyridines and pyridazines having angiogenesis inhibiting activity and the generalized structural formula 1

Abstract: An optical waveguiding optical format enables consistent optical analysis of small sample volumes with minimal variation in light path length among optical formats. The optical format is comprised of an input guide, an output guide, and a sample cavity adapted to allow light to pass through a sample on its way from the input guide to the output guide. A lid removed from the light pathway within the format may be provided with a reagent for assisting fluid analysis.

Abstract: A system for determining the concentration of an analyte in at least one body fluid in body tissue, the system comprising an infrared light source, a body tissue interface, a detector, and a central processing unit. The body tissue interface is adapted to contact body tissue and to deliver light from the infrared light source to the contacted body tissue. The detector is adapted to receive spectral information corresponding to infrared light transmitted through the portion of body tissue being analyzed and to convert the received spectral information into an electrical signal indicative of the received spectral information. The central processing unit is adapted to compare the electrical signal to an algorithm built upon correlation with the analyte in body fluid, the algorithm adapted to convert the received spectral information into the concentration of the analyte in at least one body fluid.

Abstract: The present invention relates to monocotyledon plant cells and plants which are genetically modified, wherein the genetic modification consists of the introduction of an extraneous nucleic acid molecule which codes for a protein with the biological activity of an R1 protein. The present invention further relates to means and methods for the production thereof. Plant cells and plants of this type synthesise a modified starch, which is characterized in that it has an increased phosphate content and/or a modified phoshorylation pattern and/or an increased final viscosity in an RVA profile and/or a reduced peak temperature in DSC analysis and/or an increased gel strength in the texture analysis compared with starch from corresponding non-genetically modified monocotyledon plants. Therefore, the present invention also relates to the starch which is synthesized from the plant cells and plants according to the invention, and to methods of producing said starch.

Abstract: The invention relates to a novel process for preparing known asymmetrical 4,6-bis(aryloxy)pyrimidine derivatives.