| JFE CHEMICAL CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20120088109 | LINEAR POLYIMIDE PRECURSOR, LINEAR POLYIMIDE AND HEAT-CURED PRODUCT THEREOF, AND METHOD FOR PRODUCING THEM - A linear polyimide is produced from mellophanic dianhydride, diamine (NH | 04-12-2012 |
| 20120032119 | METHOD FOR PRODUCING LITHIUM IRON PHOSPHATE - A method for producing lithium iron phosphate includes: an aqueous solution preparing step of preparing an aqueous solution containing a phosphoric acid and a carboxylic acid; a first forming step of adding iron particles containing 0.5 mass % or more of oxygen to the aqueous solution, and making the phosphoric acid and the carboxylic acid and the iron particles react with each other in the aqueous solution under an oxidizing atmosphere, to form a first reaction liquid is formed by; the second forming step of adding a lithium source to the first reaction liquid obtained in the synthesizing step to form a second reaction liquid; the precursor forming step of drying the second reaction liquid to form a lithium iron phosphate precursor; and the primary baking step of baking the lithium iron phosphate precursor under a non-oxidizing atmosphere thus obtaining lithium iron phosphate. | 02-09-2012 |
| 20110279217 | MN-ZN FERRITE CORE AND METHOD FOR PRODUCING THE SAME - A Mn—Zn ferrite core includes a basic component, sub-components, and unavoidable impurities, wherein, as the sub-components, silicon oxide (in terms of SiO | 11-17-2011 |
| 20110279216 | MN-ZN-CO FERRITE CORE AND METHOD FOR PRODUCING THE SAME - A Mn—Zn—Co ferrite core includes a basic component, sub-components, and unavoidable impurities. As the sub-components, silicon oxide (in terms of SiO | 11-17-2011 |
| 20110278491 | MN-ZN-CO FERRITE - Disclosed is a MnZnCo-based ferrite consisting of base constituents, accessory constituents, and inevitable impurities, which MnZnCo-based ferrite is characterized by adding silicon oxide (SiO2 conversion): 50-400 mass ppm and calcium oxide (CaO conversion): 1000-4000 mass ppm as secondary constituents to base constituents consisting of iron oxide (Fe2O3 conversion): 51.0-53.0 mol %, zinc oxide (ZnO conversion): greater than 12.0 mol % and less than 18.0 mol %, cobalt oxide (CoO conversion): 0.04-0.60 mol %, and manganese oxide (MnO conversion): remainder, and keeping phosphorus, boron, sulfur, and chlorine of the inevitable impurities to phosphorous: less than 3 mass ppm, boron: less than 3 mass ppm, sulfur: less than 5 mass ppm, and chlorine: less than 10 mass ppm. This MnZnCo-based ferrite has the superior characteristics of always having incremental permeability [mu]? of 2000 or greater across a wide temperature range of −40 DEG C. to 85 DEG C. when a 33 A/m direct current magnetic field is applied, even in cases when formed into a small core with outside diameter of approximately 2-6 mm. | 11-17-2011 |
| 20110148006 | FIBRE-PRODUCTION DEVICE AND FIBRE-PRODUCTION METHOD - A fiber-producing apparatus includes a storage tank for storing a melt of a source material, an electric storage tank heater, a non-contact thermometer for the melt, a temperature control section which between the electric heater and its power supply, which controls the electric heater based on measurement results obtained from the non-contact thermometer to adjust the temperature of the melt, a nozzle for ejecting the melt in the storage tank, a collector for collecting a fiber, a voltage generator for electrifying the melt, and an insulating transformer disposed between the temperature control section and the electric heater. Since a closed circuit is formed by the electric heater, the electric heater power supply, the temperature control section, and the insulating transformer disposed therebetween, no high-voltage current flows into the electric heater power supply or the temperature control section. This allows stable spinning to be readily performed without breaking the apparatus. | 06-23-2011 |
| 20110012702 | MnZn FERRITE AND A TRANSFORMER MAGNETIC CORE - A MnZn ferrite having excellent characteristics of an incremental permeability μΔ value of 250 or greater in a wide temperature range of 0 to 85° C. and an incremental permeability μΔ value of 400 or greater at 65° C. when an 80 A/m direct current magnetic field is applied is provided. The MnZn ferrite has basic components that comprise: ferric oxide (in terms of Fe | 01-20-2011 |
| 20100147564 | ASYMMETRIC LINEAR POLYIMIDES AND THEIR POLYIMIDE PRECURSORS, AND THEIR MANUFACTURING METHODS - Disclosed is a linear polyimide precursor having an intrinsic viscosity of not less than 0.5 dL/g and composed of a repeating unit represented by at least one formula selected from the group consisting of the general formula (1) below and the general formula (2) below. In the general formulae (1) and (2), X represents a divalent aromatic group other than a residue of 1,4-bis(4-aminophenoxy)benzene and a residue of bis(4-amino-3-methylphenyl)methane or an aliphatic group. Since this linear polyimide precursor has high glass transition temperature and high toughness, while exhibiting excellent solubility and thermoplasticity, it is suitably used as a raw material for an asymmetric polyimide which is useful as an adhesive resin for flexible printed circuits (FPC) or the like. | 06-17-2010 |
| 20100056824 | METHOD FOR PREPARATION OF 1,2,3,4-BENZENETETRACARBOXYLIC ACID - A method for preparation of 1,2,3,4-benzenetetracarboxylic acid includes oxidizing 1,2,3,4,5,6,7,8-octahydrophenanthrene with potassium permanganate. | 03-04-2010 |
| 20090267508 | BLUE-LIGHT-EMITTING ELEMENT COMPRISING POLYIMIDE - A blue-light-emitting element includes a polyimide containing a repeating unit represented by formula (1): | 10-29-2009 |
