摘要:
There is disclosed a process for prevention the polymerization of a vinyl compound selected from acrylic acid and methacrylic acid which comprises allowing at least one corrosion inhibitive substance selected from an alcohol and inorganic acid or salt thereof, an aromatic carboxylic acid or salt thereof and a zinc-containing salt to coexist with a metallic salt of dithiocarbamic acid, in prevention the polymerization of the vinyl compound with the metallic salt of dithiocarbamic acid.
摘要:
There is disclosed a process for preventing the polymerization of a vinyl compound which comprises allowing water in an amount of 0.05 to 5% by weight based on the vinyl compound or a corrosion inhibitive substance selected from an alcohol, an inorganic acid or its salt, an aromatic carboxylic acid or its salt and a zinc-containing salt in an amount of preferably 0.01 to 5% by weight based on the same, to coexist with a metallic salt of dithiocarbamic acid, in preventing the polymerization of the vinyl compound with the metallic salt of dithiocarbamic acid. The above process makes it possible to effectively inhibit the polymerization of acrylic acid, methacrylic acid, etc. in the distillation system, etc. of the production process for the above acids as well as the corrosion of the equipment and machinery to be used therein and also to assure long-term stable continuous operation of the equipment and machinery.
摘要:
An optical disk apparatus includes a carriage, a plurality of objective lens support portions, and a plurality of magnetic field generating means. The carriage is placed to oppose an optical disk and held to be reciprocally movable between an outer peripheral portion of the optical disk and its central portion. Each of the objective lens support portions has an objective lens elastically supported by an elastic member. The magnetic field generating means move each of the objective lenses in a direction perpendicular to the surface of the optical disk and a radial direction of the optical disk. Some of the magnetic field generating means which are used, in pairs, for the objective lens support portions are shared by the plurality of objective lens support portions.
摘要:
A simulator apparatus collects communication information on a transmission line by a line information collecting module, extracts the communication information between a server and clients from the collected communication information by an information extracting module, and further discriminates the communication information necessary for a simulation on a protocol unit basis from the communication information and converts to a simulating procedure by a procedure converting module. A simulation processing module performs a simulating operation of the client for the server in accordance with a simulation definition file of the simulating procedure and operating conditions and stores an operating situation to a performance log file.
摘要:
A system in which a plurality of spinning frames and a plurality of winders are connected by a common bobbin conveying passage, a circulating passage having a bobbin sensor is provided on a spinning bobbin supplying passage from the bobbin conveying passage to the winders, and a stopper is provided at an inlet of the circulating passage, the stopper being adapted to stop receiving bobbins when the number of passing bobbins per a predetermined time detected by the bobbin sensor exceeds a set value.
摘要:
Disclosed is a process for the preparation of rubber laminates, according to which a rubber laminate having a high bonding strength can be obtained by contacting an uncured composition A comprising a fluororubber and a metal oxide with an uncured composition B comprising an epichlorohydrin rubber and a phosphonium salt represented by the following general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each stand for a hydrocarbon residue having 1 to 20 carbon atoms, which may be substituted, with the proviso that up to three of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be a primary, secondary or tertiary amino group of a fluoroalkyl group, and R.sub.5 stands for a hydrogen atom or an alkyl group having 1 to 20 carbon atoms, and curing the uncured compositions.
摘要:
A percutaneous-administration-type pharmaceutical preparation of nitroglycerin comprising a backing that is impervious to medicines, and a pressure-sensitive adhesive layer that is disposed on one surface of the backing, wherein the pressure-sensitive adhesive layer contains alkyl (meth)acrylate copolymer in the concentration of 80-95% by weight and the nitroglycerin in the concentration of 5-20% by weight, said copolymer contains as major copolymer components alkyl (meth)acrylate with alkyl groups having 6 or more carbon atoms, which alkyl (meth)acrylates include 2-ethylhexylmethacrylate in the concentration of 40-90% by weight based on the total weight of said alkyl (meth)acrylates, and the copolymer has a rolling ball tack value of 2 or less. The preparation obtained makes it possible for nitroglycerin to be absorbed percutaneously at a controlled rate for long periods of time.
摘要:
A process for the production of polyesterpolycarbonate is described, which comprises reacting an aqueous alkaline solution of dihydric phenol and an organic solvent solution of acid chloride to prepare polyester oligomer, mixing chloroformate group-containing polycarbonate oligomer with the polyester oligomer, and polycondensing the polyester oligomer and the polycarbonate oligomer to form the polyesterpolycarbonate.
摘要:
Provided are a semiconductor device which enables reduction of diffusion of Si in the manufacturing process of an MIPS element and suppression of an increase in EOT, and a method of manufacturing the same. An embodiment of the present invention is a semiconductor device including a field effect transistor having a gate insulating film provided on a silicon substrate and a gate electrode provided on the gate insulating film. The gate electrode is a stack-type electrode including a conductive layer containing at least Ti, N, and O (oxygen) and a silicon layer provided on the conductive layer, and the concentration of oxygen in the conductive layer is highest in the side of the silicon layer.
摘要:
The present invention provides a novel compound having an excellent antitumor effect, stability and metabolic stability. The compound of the present invention is represented by the following general formula (1) wherein R1 represents a halogen atom, an aryl group, an aryloxy group or a lower alkyl group optionally substituted with one or more halogen atoms; R2 represents hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group; and; m represents an integer of 1 to 3; provided that when m represents 2 or 3, R1s are the same or different.