摘要:
A thermosensitive recording material comprising (a) a support, and (b) a thermosensitive recording layer formed on the support, comprising a leuco dye and a color developing agent comprising a metal salt or metal complex of a compound having formula (I), which is capable of inducing color formation in the leuco dye upon application of heat thereto: ##STR1## wherein X represents a halogen, an alkyl group having 1 to 10 carbon atoms, or an alkoxyl group having 1 to 10 carbon atoms; R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 independently represent hydrogen, a halogen, a hydroxyl group, an alkyl group having 1 to 10 carbon atoms, an alkoxyl group having 1 to 10 carbon atoms, an aralkyloxyl group having 7 to 20 carbon atoms, an aryloxyl group having 6 to 20 carbon atoms, an alkylthio group having 1 to 10 carbon atoms, an aralkylthio group having 6 to 20 carbon atoms or an arylthio group having 6 to 20 carbon atoms, R.sup.1 and R.sup.2, or R.sup.2 and R.sup.3 may form together with an adjacent benzene ring a naphthalene ring, a tetrahydronaphthalene ring or an indan ring; and m is an integer of 1 to 4.
摘要:
A process for preparing a methylphenol from an alkylbenzene which process comprises oxidizing by molecular oxygen an alkylbenzene having one secondary alkyl group and 1-3 methyl groups of the general formula I ##STR1## where R is a secondary alkyl group and n is an integer of 1-3, acid-decomposing the oxidation product solution in the presence of an acid catalyst, stopping the acid-decomposition reaction before its completion, hydrogenating the acid decomposition product solution in the presence of a hydrogenation catalyst in the presence or absence of a solvent, and recovering the resulting methylphenol of the general formula II ##STR2## where n is an integer of 1-3 from the hydrogenation product solution.
摘要:
An exhaust gas recirculating control system for internal combustion engines including an engine vacuum operated exhaust gas recirculating valve which allows recirculation of the engine exhaust when a high vacuum is applied, an engine vacuum operated vacuum control valve which allows air pressure to be applied to the exhaust gas recirculation valve when the engine vacuum exceeds a predetermined level, and a vacuum transmitting valve which delays in time the application of engine vacuum to the vacuum control valve. In this way, exhaust gas recirculation occurs during a fixed period after acceleration of the vehicle occurs.
摘要:
A selector sequentially selects different coefficients during a time interval T. A plurality of coefficient multipliers multiply an input signal sampled at intervals T and coefficients selected by the selector. An input circuit selects, at interval T/2, an input signal supplied at intervals T. A pipeline type adder adds an output signal of the input circuit and output signals of the coefficient multipliers. An output circuit adds an output signal of the adder in an interval of T/2 and outputs the result of the addition as a signal of a period of T.
摘要:
An oxygen indicator adapted for printing or coating which comprises (a) at least one reducing agent, (b) a dyestuff causing color change when it is reduced with the reducing agent, (c) at least one thickening agent and (d) at least one solvent and a sheet-like oxygen indicator in which a composition comprising the above four components (a)-(d) is coated or printed on a substrate are disclosed.
摘要:
Fire retardant tablet is provided which is produced by tableting a fire retardant mixture containing heat-expandable graphite (A), and a water-soluble fire retardant synergist (B) or one containing additionally water-insoluble fire-retardant synergist (C). A method for fire retardation, a fire-retardant polymer composition, and a molded article of a fire-retardant resin by use of the fire retardant tablet are also provided. In the production of a fire retarding polymer composition containing heat-expandable graphite, the crushing of the heat-expandable graphite under melt-shearing is minimized.
摘要:
This invention relates to an internal combustion engine including an oil seal ring between a cylinder block and a crank shaft, a crank shaft cap and a conduit. The cylinder block includes a plurality of cylinders, a crank shaft support portion and an oil seal retainer. The crank shaft support portion is located under the plurality of cylinders and the oil seal retainer projects outwardly from the cylinder block. A crank case is defined within the cylinder block. The crank shaft cap is secured to the crank shaft support portion and an opening is defined therebetween. The crank shaft includes a main journal and a flange portion. The main journal is inserted into the opening defined between the crank shaft support portion and the crank shaft cap. The crank shaft is rotatably mounted on both the cylinder block and the crank shaft cap. The flange portion extends outwardly from the main journal and is spaced from the crank shaft support portion and the oil seal retainer of the cylinder block, so that a cavity is defined between the flange portion of the crank shaft, the oil seal retainer, the crank shaft support portion of the cylinder block and the crank shaft cap. The oil seal ring is located between the oil seal retainer of the cylinder block and the outer peripheral surface of the flange portion. The conduit is defined within the crank shaft support portion or the crank shaft cap. The conduit communicates the cavity with the crank case.