摘要:
Gaskets are placed in joints between adjacent nonferrous metal engine members of a water-cooled engine for an outboard motor, such as a cylinder block, a cylinder head, a crankcase, a mount case and an oil pan, to seal the joints. Each of the gaskets has a base member formed of a stainless steel. The surfaces of the base member are coated with electrochemical corrosion preventing films formed by applying a liquid containing flakes of an aluminum alloy or a zinc alloy and a silicate resin in films and baking the films of the liquid. The electrochemical corrosion preventing films are coated with sealing films formed by applying a liquid containing aluminum flakes and a silicate resin to the electrochemical corrosion preventing films and baking the films of the liquid. The gaskets are prevented from electrochemically corroding despite potential difference between each gasket and the adjacent engine members.
摘要:
Gaskets are placed in joints between adjacent nonferrous metal engine members of a water-cooled engine for an outboard motor, such as a cylinder block, a cylinder head, a crankcase, a mount case and an oil pan, to seal the joints. Each of the gaskets has a base member formed of a stainless steel. The surfaces of the base member are coated with electrochemical corrosion preventing films formed by applying a liquid containing flakes of an aluminum alloy or a zinc alloy and a silicate resin in films and baking the films of the liquid. The electrochemical corrosion preventing films are coated with sealing films formed by applying a liquid containing aluminum flakes and a silicate resin to the electrochemical corrosion preventing films and baking the films of the liquid. The gaskets are prevented from electrochemically corroding despite potential difference between each gasket and the adjacent engine members.
摘要:
Mounting port, provided adjacent to a cooling water passageway, has a hole opening from the passageway for mounting an anode metal in the passageway. Lid member, which closes the outer end of the hole, has a head portion formed at its outer end and an externally threaded portion engageable with an internally threaded portion of the hole with a sealing member sandwiched therebetween. The lid member having the anode metal fixed thereto is inserted in and attached to the port with the threaded portions engaging with each other with a sealing tape sandwiched therebetween. Space is defined between an outer end portion of the port and an outer end portion of the lid member between the head portion and the externally threaded portion so that part of the sealing member protruding from between the threaded portions can be received in the space.
摘要:
Mounting port, provided adjacent to a cooling water passageway, has a hole opening from the passageway for mounting an anode metal in the passageway. Lid member, which closes the outer end of the hole, has a head portion formed at its outer end and an externally threaded portion engageable with an internally threaded portion of the hole with a sealing member sandwiched therebetween. The lid member having the anode metal fixed thereto is inserted in and attached to the port with the threaded portions engaging with each other with a sealing tape sandwiched therebetween. Space is defined between an outer end portion of the port and an outer end portion of the lid member between the head portion and the externally threaded portion so that part of the sealing member protruding from between the threaded portions can be received in the space.
摘要:
A microlens transcription molding roller used for transcription-molding a plurality of microlenses on a sheet includes a plurality of microlens molding surfaces arrayed on an outer circumference of the roller along one spiral around an axis of the roller at a constant interval.
摘要:
The present invention provides a water-soluble transition metal-diamine complex which can be easily separated from reaction products through liquid separation, etc. and is recycleable; an optically active diamine compound constituting the ligand of the complex; and a catalyst for asymmetric synthesis which comprises these. The present invention relates to a water-soluble optically active transition metal-diamine complex represented by the formula (2): [wherein R1 and R2 each represents hydrogen, a hydrocarbon group, —SO2R13 (wherein R13 is a hydrocarbon group, substituted amino, etc.), etc.; R3 to R12 each represents hydrogen, a hydrocarbon group, alkoxy, substituted amino, etc.; M represents a transition metal; X represents halogen; L represents a ligand; and * indicates an asymmetric carbon atom; provided that at least one of R3 to R7 and R8 to R12 is substituted amino], a catalyst for asymmetric synthesis containing the complex, and a process for producing an optically active alcohol, which comprises using the catalyst to asymmetrically reduce a ketone.
摘要:
A process for producing highly pure 3-1-menthoxypropane-1,2-diol safely and efficiently, and an intermediate to be used in the process. 3-1-menthoxypropane-1,2-diol represented by the chemical formula (IV) is produced by adding 1-menthol to a 1,2-epoxy-3-halogenopropane represented by the following general formula (I) (wherein X represents a halogen atom) in an organic solvent in the presence of a Lewis acid to produce a novel 1-halogeno-3-1-menthoxypropan-2-ol represented by the following general formula (II), then, epoxidating it with a base in the presence of a phase transfer catalyst to produce a 1,2-epoxy-3-1-menthoxypropane represented by the chemical formula (III), and further hydrolyzing it.
摘要:
An (E)-(R)-2-alkyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl)-2-buten-1-ol represented by formula (I): ##STR1## wherein R represents an alkyl group having 1 to 3 carbon atoms, and a process for preparing the same comprising hydrogenating a corresponding (E)-(R)-2-alkyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl)-2-buten-1-al in the presence of a ruthenium-phosphine complex as a catalyst, a base comprising an alkali metal or an alkaline earth metal, and an amine. The compound (I) has an excellent sandalwood oil odor.
摘要:
An (E)-(R)-2-alkyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl)-2-buten-1-ol represented by formula (I): wherein R represents an alkyl group having 1 to 3 carbon atoms,and a process for preparing the same comprising hydrogenating a corresponding (E)-(R)-2-alkyl-4-(2,2,3-trimethylcyclopent-3-en-1-yl)-2-buten-1-al in the presence of a ruthenium-phosphine complex as a catalyst, a base comprising an alkali metal or an alkaline earth metal, and an amine. The compound (I) has an excellent sandalwood oil odor.
摘要:
A lawn mower has a cutter blade rotatable in a substantially horizontal plane, and a cutter housing with the cutter blade being rotatably accommodated therein, the cutter housing comprising an upper wall having a raised scroll, and a circumferential wall having a discharge duct contiguous to the scroll and defining a discharge port. A first inner member is detachably disposed along inner surfaces of the upper and circumferential walls of the cutter housing, the first inner member having an inner surface of arcuate cross section. A second inner member is detachably disposed in the discharge duct contiguously to the first inner member in closing relationship to the discharge port, the second inner member being separate from the first inner member and having an inner surface of arcuate cross section.