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| Number | Title | Issue Date |
| 7399820 | Cyclic oligoformals in polycarbonate A thermoplastic molding composition comprising (co)poly(ester)carbonate, and a cyclic oligoformal is disclosed. The composition that is characterized in its lowered water absorption and improved flowability is suitable for a variety of application including in parti... | 07/15/2008 |
| 7361297 | Process for making a decorated laminate A laminate comprising a printed layer, a transparent thermoplastic polyurethane layer and a layer forming a substrate of a thermoplastic material is disclosed. The laminate that is characterized in that the printed layer is interposed between the layer forming a sub... | 04/22/2008 |
| 7358290 | Polycarbonate molding compositions with improved hydrolysis resistance A thermoplastic molding composition is disclosed. The composition that contains at least one member selected from the group consisting of aromatic polycarbonate and polyester carbonate, a rubber-modified vinyl (co)polymer, and calcium carbonate having average partic... | 04/15/2008 |
| 7345133 | Branched polycarbonates A branched polycarbonate and processes for its preparation are disclosed. The polycarbonate contains structural units conforming to in which R1, R2, R3 and R4 mutually independent... | 03/18/2008 |
| 7332560 | Thermoplastic molding compositions having reduced water absorption A thermoplastic molding composition comprising polycarbonate and at least one (co)polyformal is disclosed. Characterized by its low water absorption the composition is particularly suitable for producing molded articles, especially optical data carriers, such as com... | 02/19/2008 |
| 7319116 | Flame-resistant polycarbonate molding composition modified with a graft polymer A flame resistant thermoplastic molding composition having improved mechanical properties is disclosed. The composition contains polycarbonate, a graft polymer and a phosphorus compounds of formula (I): and a mix... | 01/15/2008 |
| 7314897 | Aromatic formals as additives for lowering the water uptake of polycarbonates A thermoplastic molding composition comprising polycarbonate and at least one aromatic formal is disclosed. The formal conforms to The composition that is characterized by its reduced water uptake, is useful especi... | 01/01/2008 |
| 7314590 | Method of preparing a coated molded plastic article A gasket (1) having a reversibly compressible lower portion (17), and an upper portion (14) having at least one upwardly extending extension, is described. The upper portion (14) of the gasket (1) includes a first (34) and o... | 01/01/2008 |
| 7301056 | Process for the separation of phenol from phenol-containing streams from the preparation of Bisphenol A A continuous process for the separation of phenol is disclosed. The process includes (a) feeding a stream of material, produced while preparing bisphenol A by reacting phenol with acetone, into a distillation column containing at least 5 theoretical separation stage... | 11/27/2007 |
| 7279544 | Transesterification process for the production of polycarbonates having a low content of volatile compounds A multi stage process for the production of polycarbonates having low monomer content is disclosed. The process entails, in sequence, (i) transesterifying in the melt at least one dihydroxyaryl compound with at least one diaryl carbonate in the presence of at least ... | 10/09/2007 |
| 7276197 | Method for in-mold lamination of foils A method is described for the back-moulding of sheets (7) with thermoplastics, in particular of printed sheets to protect the decorated surface against scratching or detachment, in which a sheet (7) that is initially separated from the moulded-article ... | 10/02/2007 |
| 7250483 | Inhibition of catalytically active impurities in polycarbonate by the melt transesterification process An improvement to the melt transesterification process for the preparation of polycarbonate is disclosed. The improvement entails adding to the process between its medium viscosity reactor and a high viscosity reactor at least one bridged ester of organic sulphur-co... | 07/31/2007 |
| 7220790 | Flame-resistant polycarbonate molding compositions A thermoplastic molding composition having good flame resistance, melt flowability, resistance to chemicals and creep is disclosed. The composition contains A) at least one member having weight average molecular weight (Mw) of 25,000 to 35,000 g/mol, sele... | 05/22/2007 |
| 7214752 | Homopolymers which exhibit a high level of photo-inducable birefringence Homopolymers suitable for storage of information provided optically are disclosed. The are formed from monomers which contain groupings which are at least trinuclear, which are capable of absorbing the electromagnetic radiation of ... | 05/08/2007 |
| 7214451 | Rewriteable optical recording material having good solubility Polymeric material suitable for the preparation of optical recording media for volume data storage is disclosed. The molecular structure of the material contains a main chain derived from any of poly(meth)acrylate, poly(meth)acrylamide, polysiloxane, polyurea, polyu... | 05/08/2007 |
| 7208564 | Branched polyformals and copolyformals their preparation and use A branched (co)polyformal is disclosed. The (co)polyformal contains structural units conforming to at least one the general formulae (1a) and (1b) wherein each of -E- and -D- independently of one another denote a... | 04/24/2007 |
| 7201964 | Molded polycarbonate articles having improved optical and processing properties A transparent sheet having improved optical properties is disclosed. The sheet that features a deviation angle αε (min) according to DIN 52305-A-AS of ≦2.0 and a refracting power Dε (min) according to DIN 52305-A-AZ of ≦0.05, is prepared... | 04/10/2007 |
| 7199208 | Polyformals and copolyformals with reduced water absorption, production and use thereof A thermoplastic molding composition comprising a linear (co)polyformal is disclosed. The (co)polyformal corresponds to formulae (Ia) or (Ib), in which A independently denotes hydrogen or phenyl, —O-D-O— and â... | 04/03/2007 |
| 7175675 | Method of dyeing a plastic article In the method of the present invention a plastic article (e.g., a molded article of thermoplastic polycarbonate) is immersed at least partially in a dye bath which includes one or more dyes, water, at least one carrier, and at least one diol. The dye bath contains: ... | 02/13/2007 |
| 7144540 | Method of making metallized plastic moldings and their use A method of making a plastic molding is disclosed. The multi-step method entails applying a metallic layer 20 to 150 nm thick to a translucent plastic film having a thickness of 50 to 750 μm, removing part of the metallic layer, and applying to the metallized side ... | 12/05/2006 |
| 7144935 | Flame-resistant polycarbonate compositions containing phosphorus-silicon compounds A flame resistant poly(ester)carbonate composition is disclosed. The composition contains at least one phosphorus-silicon compound, the compound has a phosphorus content of 1 to 20% and a silicon content of 1 to 20%, and is characterized in that its weight loss (ass... | 12/05/2006 |
| 7138478 | Process for mixing polymer melts with additives A continuous process for mixing polymer melts with additives, in particular polycarbonate melts with additives in liquid form, in solution or in dispersion is described. The additives are added to a main stream of polymer melt and are then mixed, preferably directly... | 11/21/2006 |
| 7132497 | Aromatic dihydroxy compound useful for the preparation of (CO)polycarbonates An aromatic dihydroxy compound conforming to formula 1 is disclosed. Also disclosed are (co)polycarbonates derived from the compound. The novel (co)polycarbonates are characterized by their reduced water uptake a... | 11/07/2006 |
| 7129315 | Process for the production of polycarbonate A process for the isolation of polycarbonate produced by the interfacial polymerization process is disclosed. Accordingly, the process entails (a) evaporating the organic solvent from the solution that contains solvent and polycarbonate to obtain a material system t... | 10/31/2006 |
| 7112703 | Production of bisphenol-A with reduced sulfur content A process for the production of bisphenol-A having low concentration of sulphur is disclosed. The process comprise a) reacting phenol with acetone in the presence of a sulfonic acid ion exchanger to form a product mixture containing water, bisphenol-A/phenol adduct,... | 09/26/2006 |
| 7105592 | Polycarbonate molding compounds containing a special talc A thermoplastic molding composition comprising polycarbonate resin, at least one impact modifier and highly pure talc is disclosed. The talc is characterized in that it contains Al2O3 in an amount of less than 1% relative to the weight of said ... | 09/12/2006 |
| 7097796 | Method of preparing a decorated molded article A method of preparing a molded article by means of an in-mold decoration process, is described. The method includes, providing a laminate (4) of a plurality of separate releasable thermoplastic labels (14) superposed over a carrier film (26). A ... | 08/29/2006 |
| 7094263 | Composition of matter comprising a dye A composition of matter (e.g., a molded article) is described. More particularly, the composition of matter includes: (a) a resinous component selected from at least one member of the group consisting of (co)polyester, (co)polycarbonates, acrylonitrile-butadiene-sty... | 08/22/2006 |
| 7091370 | Process for the preparation of diaryl carbonates A process for the preparation of an aromatic carbonate is disclosed. The process entails reacting an aromatic hydroxy compound of the formula R—(O—H)k, with carbon monoxide and oxygen, optionally in a solvent and in the presence of catalyst components... | 08/15/2006 |
| 7091302 | Process for the preparation of polycarbonate The invention describes a process for the preparation of polycarbonate. The process includes (a) transesterifying at least one aromatic dihydroxyaryl compound and a diaryl carbonate in the melt in the presence of a catalyst, (b) mixing the ... | 08/15/2006 |
| 7081490 | Polymer blends containing modified polyesters The present invention relates to polymer blends containing a component selected from the group poly(ester)carbonates, graft polymers or mixtures thereof, polyalkylene naphthalate as the second component optionally together with a further component selected from the ... | 07/25/2006 |
| 7079372 | Film as a dielectric in capacitors and process for its production A dielectric capacitor having self healing properties is disclosed. The capacitor includes a film made of an amorphous aromatic copolycarbonate having a weight average molecular weight of at least 10,000 and a glass transition temperature of at least 160° C. In a p... | 07/18/2006 |
| 7071283 | Reactive rectification The invention relates to a method for producing polycarbonate according to the method for the transesterification of molten mass whereby bis-(hydroxyaryl) compounds (bisphenols) and diaryl carbonates are reacted by means of reactive rectification. ... | 07/04/2006 |
| 7071284 | Process for the preparation of polycarbonates An improvement in the continuous two-phase interfacial condensation process for preparing polycarbonate is disclosed. In the process that entails at least one diphenol, phosgene, at least one chain terminator, and optionally branching agents and is carried out in th... | 07/04/2006 |
| 7067567 | Impact-modified polycarbonate blends A thermoplastic molding composition having improved flammability rating and mechanical properties is disclosed. The composition contains aromatic polycarbonate having a weight-average molecular weight Mw≧25,000 g/mol., polyalkylene terephthalate, graft ... | 06/27/2006 |
| 7060788 | Process for stripping monomers and other volatile constituents from polymer melts A process for stripping volatile constituents from polymer melts is disclosed. The process entails introducing the polymer melt into a horizontally oriented cylindrical device that contains a plurality of perforated disks rotating about a common horizontally oriente... | 06/13/2006 |
| 7056855 | Liquid tetrabutyl ammonium phenolate formulation A process for preparing a formulation containing tetrabutylammonium phenolate and phenol is disclosed. The process entails combining a solution of tetrabutylammonium bromide in phenol with a solution of sodium phenolate to form a mixture, excess phenol is removed by... | 06/06/2006 |
| 7058618 | Method for establishing stress/strain curves by means of spline interpolation on the basis of characteristic points and with the use of neural networks A stress/strain curve is established by means of neural networks 1 to N and 4. To that end, parameters are input into the input 50, from which the neural networks 1 to N respectively establish the principal components of characteristic po... | 06/06/2006 |
| 7041732 | Compatible blend of polycarbonate with vinyl (co)polymer A compatible blend of polycarbonate resin with a vinyl (co)polymer blending partner is disclosed. The preparation of inventive blend comprise reactive blending of polycarbonate, a vinyl (co)polymer and a novel compatibilizer in the presence of a transesterification ... | 05/09/2006 |
| 7030180 | Polycarbonate compositions with reduced iron content A polycarbonate composition containing inorganic material with an anisotropic particle geometry and with an iron content of less than about 100 ppm is disclosed. The composition is suitable for producing molded articles exhibiting improved mechanical properties both... | 04/18/2006 |
