Asahi Kasei Corporation is a global Japanese chemical company. Its main products are chemicals and materials science. It was founded in May 1931, using the paid in capital of Nobeoka Ammonia Fiber Co., Ltd, a Nobeoka, Miyazaki based producer of ammonia, nitric acid, and other chemicals. Now headquartered in Tokyo, with offices and plants across Japan, as well as China, Singapore, Thailand, U.S.A. and Germany.The company is listed on the first section of Tokyo Stock Exchange and is a constituent of the TOPIX 100 and Nikkei 225 stock market indices. Wikipedia.
Asahi Kasei Corporation | Date: 2015-08-26
An object of the present invention is to provide, for the production of isobutene, a high-yielding, highly-selective, and long-term stable production process of isobutene from TBA. With respect to the production of TBA, an object of the present invention is to provide a TBA production process in which, through long-term stable maintenance of a high reaction activity, long-term continuous operation is enabled and the productivity is improved. The present invention discloses a process for producing isobutene that employs a dehydration temperature of from 200 to 450 C. in use of an alumina catalyst that contains a Na content of 0.6% by weight or less in terms of NaO
Asahi Kasei Corporation | Date: 2015-10-27
An angular velocity sensor is provided, the angular velocity sensor comprising: a housing an outer edge shape of which is a polygon in a planar view; a planar substrate fixed to the housing; a vibrating weight that is surrounded by the housing and is formed to extend in a perpendicular direction in relation to the planar substrate on the planar substrate; and a vibrating unit to vibrate the vibrating weight in a predetermined direction, wherein the vibrating unit vibrates the vibrating weight in a different direction from a direction of a straight line that connects the shortest distance between the outer edge of the housing and the center of gravity of the vibrating weight in a planar view.
Asahi Kasei Corporation | Date: 2015-10-20
Provided is an abrasion-resistant polyester fiber, which has, in particular, a strength within a specific range, anelongation within a specific range and a Youngs modulus falling within a specific rangein a specific elongation range on a stress-strain curve, to improve the abrasion resistance of a woven/knitted product for clothing using, in particular, a fine size polyester fiber. The polyester fiber is an abrasion-resistant polyester fiber comprising ethylene terephthalate as a main repeating unit, characterized by satisfying the following requirements: (1) the fineness being from 8 dtex to 200 dtex inclusive; (2) the single yarn fineness being from 1.0 dtex to 4.0 dtex inclusive; (3) the breaking strength being 3.5 cN/dtex or greater; (4) the breaking elongation being from 20% to 50% inclusive; and (5) the minimum differential Youngs modulus being 20 cN/dtex or less in an elongation range of from 2% to 5% inclusive on a stress-strain curve of the fiber.
Asahi Kasei Corporation | Date: 2015-10-22
A method for producing a modified conjugated diene-based polymer having a good balance between the hysteresis loss properties and the wet skid resistance, practically sufficient abrasion resistance and breaking strength, and high processability when formed into a vulcanized product is provided. A method for producing a modified conjugated diene-based polymer, comprising: a polymerization step of polymerizing a conjugated diene compound, copolymerizing conjugated diene compounds, or copolymerizing a conjugated diene compound with an aromatic vinyl compound using an alkali metal compound or an alkaline earth metal compound as a polymerization initiator to obtain a conjugated diene-based polymer having an active end, and a modifying step of reacting a compound represented by following formula (1) with the active end of the conjugated diene-based copolymer.
Asahi Kasei Corporation | Date: 2015-10-28
To accurately measure the offset of an angular velocity sensor mounted in a mobile device in a short time, provided is an offset estimation apparatus including an acquiring section that acquires an output signal from an angular velocity sensor mounted in a mobile device; a hold state judging section that judges a hold state of the mobile device; and an offset estimating section that estimates an offset of the output signal of the angular velocity sensor according to a judgment result of the hold state judging section. Also provided is a method and program. The offset estimation apparatus may include a parameter control section that controls an estimation parameter of the offset estimating section according to the judgment result of the hold state judging section.