Patent application number | Description | Published |
20130035441 | POLYCARBONATE COMPOSITIONS HAVING ENHANCED OPTICAL PROPERTIES, METHODS OF MAKING AND ARTICLES COMPRISING THE POLYCARBONATE COMPOSITIONS - In some embodiments, a composition comprises a bisphenol-A polycarbonate, wherein a molded article of the composition has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925. | 02-07-2013 |
20130108820 | PROCESS FOR PRODUCING BISPHENOL A WITH REDUCED SULFUR CONTENT, POLYCARBONATE MADE FROM THE BISPHENOL A, AND CONTAINERS FORMED FROM THE POLYCARBONATE | 05-02-2013 |
20130221837 | POLYCARBONATE MADE FROM LOW SULFUR BISPHENOL A AND CONTAINING CONVERIONS MATERIAL CHEMISTRY, AND ARTICLES MADE THEREFROM - In one embodiment, a process for producing a bisphenol A product comprises: reacting phenol with acetone in the presence of a sulfur containing promoter to obtain a reaction mixture comprising bisphenol A, phenol, and the promoter; after reacting the phenol with the acetone, cooling to form a crystal stream comprising crystals of bisphenol A and phenol; separating the crystals from the crystal steam; melting the crystals to form a molten stream of bisphenol A, phenol, and sulfur; contacting the molten stream with a base to reduce a sulfur concentration in the molten stream and form a reduced sulfur stream; and removing phenol from the reduced sulfur stream to form a bisphenol A product. | 08-29-2013 |
20130270591 | POLYCARBONATE COMPOSITIONS CONTAINING CONVERIONS MATERIAL CHEMISTRY AND HAVING ENHANCED OPTICAL PROPERTIES, METHODS OF MAKING AND ARTICLES COMPRISING THE SAME - In some embodiments, a composition comprises a bisphenol-A polycarbonate, wherein a molded article of the bisphenol-A polycarbonate has transmission level greater than or equal to 90.0% at 2.5 mm thickness as measured by ASTM D1003-00 and a yellow index (YI) less than or equal to 1.5 as measured by ASTM D1925. In some embodiments, light emitting device comprises: a lighting element located in a housing. The housing is formed from a plastic composition comprising: the polycarbonate composition and a conversion material. After the conversion material has been exposed to an excitation source, the conversion material has a luminescence lifetime of less than 10 | 10-17-2013 |
20140051802 | HIGH PURITY BISPHENOL-A AND POLYCARBONATE MATERIALS PREPARED THEREFROM - Methods for performing a condensation reaction are disclosed. Specifically, various methods for the production of highly-pure bisphenol-A are disclosed in which an attached promoter ion exchange resin catalyst system is combined with a solvent crystallization step. | 02-20-2014 |
20140051803 | HIGH PURITY BISPHENOL-A AND POLYCARBONATE MATERIALS PREPARED THEREFROM - A modified ion exchange resin catalyst having an attached dimethyl thiazolidine promoter is disclosed. Also disclosed is a process for catalyzing condensation reactions between phenols and ketones, wherein reactants are contacted with a modified ion exchange resin catalyst having an attached dimethyl thiazolidine promoter. Also disclosed is a process for catalyzing condensation reactions between phenols and ketones that does not utilize a bulk promoter. | 02-20-2014 |
20140117393 | LIGHT EMITTING DIODE DEVICES, METHOD OF MANUFACTURE, USES THEREOF - A light emitting diode lighting device contains a light emitting diode and a lighting device component, wherein the device component comprises a polycarbonate composition comprising a bisphenol A polycarbonate; and 2,2′-(1,4-phenylene)bis(4H-3,1-benzoxazin-4-one) in an amount effective to provide a composition wherein a molded sample of the composition has a UL94 rating of V-2 or better at a thickness of 0.9 mm; an absorbance of less than 2 a.u. in the region of 370 to 380 nanometers; and an increase in yellowness index (ΔYI) of 12 or less at 2.5 mm thickness after heat aging at 130° C. for 5,000 hours. | 05-01-2014 |
20140357765 | COLOR STABLE THERMOPLASTIC COMPOSITION - A plastic article formed from a thermoplastic composition including a polycarbonate having repeating structural carbonate units according to the formula: | 12-04-2014 |
20150070933 | ILLUMINATING DEVICES WITH COLOR STABLE THERMOPLASTIC LIGHT TRANSMITTING ARTICLES - Illuminating devices are disclosed having plastic light-transmitting article(s) formed from a thermoplastic composition including a polycarbonate having repeating structural carbonate units according to the formula: | 03-12-2015 |