Class / Patent application number | Description | Number of patent applications / Date published |
428640700 | Polycarbonate containing | 22 |
20090011170 | Molding Material for Blu-Ray Disc Substrate and Molding Material for Hd Digital Versatile Disc Substrate - Provided are: a molding material for a Blu-ray Disc substrate or an HD DVD substrates which is reduced in the occurrence of appearance failures and can realize a stable yield; and a method of producing the molding material. The molding material for a Blu-ray Disc substrate or an HD DVD substrate includes: an aromatic PC resin produced by an interfacial method (A); 150 to 350 ppm (in terms of mass ppm of a total amount of the molding material, the same applies hereinafter) of fatty acid monoglyceride having 14 to 30 carbon atoms (B); 10 to 150 ppm of PETS (C); and 30 to 120 ppm of antioxidant (D). The method of producing the molding material includes: introducing the component (A) into an extruder together with, with respect to the amount of the component (A), 150 to 350 ppm of fatty acid monoglyceride having 14 to 30 carbon atoms (B), 10 to 150 ppm of PETS (C), 30 to 120 ppm of antioxidant (D), and 500 to 1,000 ppm of water (E) having an electrical conductivity of 1 μS/cm or less at 25° C., each amount being ppm of the ingredient (A) such that the water content of the PC resin in the extruder is adjusted to 500 to 1,300 ppm; producing a strand from the mixture by melt extrusion molding; cooling the strand; and cutting the strand into pellets. | 01-08-2009 |
20090047462 | THREE-LEVEL RECORDING PHASE-CHANGE OPTICAL DISC - A three-level recording phase-change optical disc including a first recording layer, a second recording layer, a third recording layer, a reflective layer, and a dielectric layer is provided. The first recording layer, the second recording layer, and the third recording layer can form three recording regions with three different reflective indexes respectively so as to increase the recording density of the optical disc. | 02-19-2009 |
20090061143 | ORGANIC COMPOUND FOR RECORDING LAYER FOR HIGH SPEED RECORDING OF INFORMATION AND OPTICAL RECORDING MEDIUM INCLUDING THE SAME - A recording layer including a novel organic compound for a high density optical recording medium is provided. The information may be recorded on the recording layer at a 2× speed or higher speed with a relatively lower writing power so that heat distribution of the recording layer in the irradiated area is not likely to become steep both in time and space. The organic compound incorporated in the recording layer has the following general chemical structural formula (I). | 03-05-2009 |
20090104395 | Disc-shaped high-density recording mediums - Optical recording mediums comprising a substrate and a recording layer and a light transmitting layer sequentially disposed on the substrate; wherein the substrate comprises one or more parts selected from the group consisting of injection molded parts, injection molded sandwich structures having a molded surface layer and a molded core layer or two injection molded parts which are UV-bonded, and combinations thereof; and wherein the substrate has a Young's modulus E of at least 2.15 GPa and a Q factor of lower than 160 measured at 25° C. at 2000 Hz in accordance to ASTM E 756-05. | 04-23-2009 |
20090117314 | PROCESS FOR THE PREPARATION OF POLYCARBONATE BY THE MELT TRANSESTERIFICATION METHOD - The invention relates to a process for the preparation of polycarbonate by the melt transesterification method, polycarbonate having a small buildup of electrostatic charge and obtainable by this process and shaped articles or extrudates, in particular optical data stores or diffuser discs, comprising this polycarbonate. | 05-07-2009 |
20090142537 | TRANSPARENT POLYCARBONATE BLEND - The invention relates to a transparent thermoplastic blend of polycarbonate (PC) and a copolymer of methyl methacrylate (MMA) and naphthyl methacrylate or a substituted naphthyl methacrylate. This copolymer has excellent miscibility with polycarbonate resin, even at elevated temperature, producing transparent polycarbonate blends. The blend provides an improved scratch resistance of polycarbonate while maintaining its excellent optical properties. | 06-04-2009 |
20090176048 | AgSb recording thin film for the inorganic write-once optical disc and the manufacturing method - A recording material of Ag1-xSbx (x=10.8˜25.5 at. %) films for WORM optical disk recording media is invented. The thermal analysis shows that the phase change temperature of AgSb film is between 250 and 270□. The optical property analysis shows that all the as deposited films have good optical absorption and high reflectivity. The X-ray Diffraction analysis shows that the as deposited film and the annealed film are kept at ∈′-AgSb crystalline phase. The TEM analysis shows that the grain size of the Ag80.9Sb19.1 film will grow after annealing. The dynamic test shows that the carrier-to-noise ratio (CNR) of the Ag80.9Sb19.1 optical disc is about 45 dB with λ=657 nm, NA=0.65 and a linear velocity of 3.5 m/s. These Ag | 07-09-2009 |
20090291248 | Coating composition, coating film, method of manufacturing coating film, and optical recording medium - A coating composition containing a solvent and a coating agent having an ionizing radiation-curable compound as a principal component thereof, wherein under the following condition for the concentration a (wt %) of the coating agent in the coating composition | 11-26-2009 |
20090304977 | Polycarbonate Resin and Optical Material Comprising the Same - A polycarbonate resin which is reduced in the change of hygroscopic-expansion coefficient with changing environ-mental humidity, is inhibited from warping, and is suitable for use as an optical material is provided with excellent productivity. The polycarbonate resin is obtained by reacting an aromatic dihydric phenol compound (2,2-bis(4-hydroxyphenyl)propane, etc.), a compound forming a carbonic ester (phosgene, etc.), and a chain terminator represented by the following general formula (A) (dodecyl 4-hydroxybenzoate, etc.). [Chemical formula 1] (A) (In the formula (A), n is an integer of 10-20.) | 12-10-2009 |
20100068445 | Optical Data Media Containing An Ultraviolet Protection Layer - Optical information media containing an ultraviolet protection layer are described. The protection layer will reduce or eliminate damage to the media's data layer and substrate. | 03-18-2010 |
20100086724 | ORGANIC DYE COMPOUND AND HIGH DENSITY OPTICAL RECORDING MEDIUM INCLUDING THE SAME - A recording layer including a novel organic dye compound (I) for a high density optical recording medium is provided. The organic dye compound (I) has the following general chemical structural formula: | 04-08-2010 |
20100221481 | OPTICAL DATA STORAGE MEDIA CONTAINING SUBSTANTIALLY INERT LOW MELTING TEMPERATURE DATA LAYER - Optical information media that contain a data layer material that is substantially inert to oxidation and has a defined melting point range are disclosed. The inertness to oxidation and melting point range make the media particularly attractive for long-term information storage. | 09-02-2010 |
20100291338 | High-Resolution Optical Information Storage Medium - The invention relates to optical information storage. | 11-18-2010 |
20110059285 | OPTICAL RECORDING MEDIUM, AND METHOD FOR PRODUCING OPTICAL RECORDING MEDIUM - An optical recording medium includes: a substrate; an information recording layer formed on the substrate for recording and reproducing an information signal by irradiation with light; and a light transmission layer formed on the information recording layer and transmitting the light, the storage elastic modulus of the light transmission layer at −5° C. being within a range of 1500 MPa or less. | 03-10-2011 |
20110189424 | OPTICAL DISC WITH THERMALLY PRINTABLE-SURFACE - An optical disc is described that bears, on one surface, a plurality of color-forming layers that can form a multicolored image when heated in contact with a thermal print head. The color-forming composition comprises color-forming layers and thermally-insulating spacers and is designed such that warping of the optical disc in conditions of changing temperature and humidity is minimized. The compliance of the color-forming composition is such that intimate contact between the thermal print head and the printable surface of the disc can be maintained as one is translated relative to the other. Methods for assembling such an optical disc are provided. | 08-04-2011 |
20110236618 | OPTICAL RECORDING MEDIA - An optical recording media includes a substrate, a cap layer opposite to the substrate, at least one first stacked recording structure, at least one second stacked recording structure, and a space layer. The first stacked recording structure including a first recording layer disposed between the substrate and the cap layer and a reflective layer disposed between the substrate and the first recording layer is disposed between the substrate and the cap layer. The second stacked recording structure including a second recording layer disposed between the substrate and the cap layer and an Nb | 09-29-2011 |
20110262678 | OPTICAL INFORMATION RECORDING MEDIUM - An optical information recording medium includes a recording layer, wherein the recording layer includes a thermoplastic resin and inorganic oxide particles dispersed in the thermoplastic resin. | 10-27-2011 |
20110300325 | DISC SHAPED HIGH DENSITY RECORDING MEDIUM - This invention relates to an optical recording medium in which at least a recording layer and a light transmitting layer are sequentially formed on a substrate and in which the light is illuminated from the light transmitting layer side for recording and/or reproducing information signals, said substrate comprising an injection molded part, and said substrate having a Young's modulus E of at least 2.15 GPa and a Q factor of lower than 160 measured at 25° C. at 2000 Hz in accordance to ASTM E 756-05 05 and a transcriptability of the pit/groove structure of >85%. | 12-08-2011 |
20120121845 | HIGH-TRANSPARENCY POLYCARBONATES WITH SCRATCH-RESISTANT COATING, PROCESS FOR PRODUCTION THEREOF AND USE THEREOF - Disclosed is a coating composition for coating polycarbonate substrates. The coating composition comprises (A) at least one radiation-curing binder, (B) nanoparticles, and (C) optionally at least one reactive diluent and/or optionally a solvent, and wherein the nanoparticles (B) comprise silicon dioxide nanoparticles, the silicon dioxide nanoparticles have a d | 05-17-2012 |
20130029081 | HIGH SPEED DVDS - This invention relates to DVDs made from polycarbonate and a special UV curable bonder material consisting of A) an urethane acrylate oligomer as binder, which is the reaction product of i) one or more polyisocyanates and ii) one or more hydroxyfunctional lactone ester (meth)acrylates having a number average molecular weight of from 200 g/mol to 2000 g/mol and having the formula: CH | 01-31-2013 |
20130216758 | OPTIONAL DISK AND METHOD FOR MANUFACTURING THE SAME - A first substrate is formed to include a surface on which a first record layer is formed, and which includes an inner circumferential portion on which a ring-shaped member is provided. Ultraviolet curing resin is dropped onto part of the surface which is located inward of the ring-shaped member, and the first substrate is then spun to coat the first record layer with the ultraviolet curing resin. Furthermore, a second substrate is formed to include a surface on which a second record layer is formed, and the second substrate is spun to coat the second record layer with ultraviolet curing resin. Then, the first and second record layers are made to face each other, and the first and second substrates are bonded to each other by the ultraviolet curing resin. | 08-22-2013 |
20140093673 | POLYCARBONATE COMPOSITION TO PRODUCE OPTICAL QUALITY PRODUCTS WITH HIGH QUALITY AND GOOD PROCESSABILITY - The present disclosure relates to thermoplastic compositions, methods of making thermoplastic compositions, and articles made from thermoplastic compositions. The disclosed compositions comprise a polycarbonate polymer, a triacylglyceride release agent, and a monoacylglyceride release agent. In an embodiment, the thermoplastic composition comprises: greater than 90 weight percent based on the total weight of the composition of a melt polycarbonate polymer; a triacylglyceride release agent; and a monoacylglyceride release agent. The total amount of triacylglyceride release agent and the monoacylglyceride release agent is 0.01 to 0.5 weight percent based on the total weight of the composition. | 04-03-2014 |