摘要:
An acetylide-form propargyl-containing resin composition for cationic electrocoating, which comprises a resin having a skeleton of epoxy resin and has a number average molecular weight of 500 to 20,000, and which contains, per 100 grams of the resin composition solids, 5 to 400 millimoles of sulfonium group and 10 to 495 millimoles of propargyl group, the total content of the sulfonium and propargyl groups being not more than 500 millimoles per 100 grams of the resin composition solids, said propargyl group being partly in the form of an acetylide. This resin composition may further contain unsaturated double bonds.
摘要:
A method for manufacturing (3S,4R)-4-[(R)-1′-formylethyl]azetidin-2-one derivatives represented by formula (3) wherein R1 represents a hydrogen atom or a protective group, through asymmetric hydroformylation of 4-vinylazetidin-2-one represented by formula (1) wherein R1 has the same meaning as described above; in the presence of a rhodium complex and a (2S,4S)-diphosphine compound represented by formula (2) wherein R2 represents a phenyl group which may be substituted with 1-5 substituent(s) selected from a lower alkyl group, a lower alkoxy group, and a halogen atom. By use of both an inexpensive optically active diphosphine compound and a rhodium complex as catalysts, intermediate compounds important for carbapenem antibiotics can be manufactured with high selectivity and efficiency.
摘要:
A novel diphosphine compound of the formula (I): ##STR1## where R.sup.1 and R.sup.2 represent independently cycloalkyl, unsubstituted or substituted phenyl, or a five-membered heteroaromatic ring. The compound is useful as a ligand for an asymmetric reaction, in particular, as an asymmetric hydrogenation catalyst.
摘要:
A phosphine compound represented by one of the formulas: ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, each represent a phenyl group or a phenyl group substituted with a halogen atom or a lower alkyl group or taken together form a divalent hydrocarbon group; and R.sup.3 and R.sup.4, which may be the same or different, each represent a lower alkyl group, a phenyl group or a phenyl group substituted with a halogen atom, a lower alkyl group or a lower alkoxy group or taken together form a divalent hydrocarbon group, and wherein R.sup.6 and R.sup.6' which may be the same or different, each represent a hydrogen atom, a lower alkyl group or a lower alkoxy group; R.sup.5, R.sup.5', R.sup.11 and R.sup.11' which may be the same or different, each represent a hydrogen atom, a lower alkyl group, a lower alkoxy group or a halogen atom; or a pair of R.sup.5 and R.sup.6 or a pair of R.sup.5' and R.sup.6' may form a ring; R.sup.7 and R.sup.8, which may be the same or different, each represent a phenyl group or a phenyl group substituted with a lower alkyl group, a halogen atom or a lower alkoxy group; and R.sup.9 and R.sup.10, which may be the same or different, each represent a phenyl group or a phenyl group substituted with a lower alkyl group, a lower alkoxy group or a halogen atom; or R.sup.9 and R.sup.10 may be taken together to form a divalent hydrocarbon group.
摘要:
A process for preparing an optically active alcohol is disclosed, which comprises asymmetrically hydrogenating a 1,3-diketone in the presence of a ruthenium-optically active phosphine complex as a catalyst. The resulting alcohol has high optical purity.
摘要:
Disclosed is a method of forming a ferrite film on particulate and/or fibrous substrate by adding an oxidizer solution and a ferrous ion solution to a deoxidized solution containing particulate and/or fibrous substrates to form a thin ferrite film on the particulate and/or fibrous substrates, wherein an addition amount of the ferrous ion solution is controlled such that an oxidation-reduction potential of the deoxidized solution keeps approximately a center point between the oxidation side and the reduction side, when a pH value of the dioxidized solution is adjusted to a constant value between pH 6 and 10.
摘要:
Control units are mutually connected by separate common signal lines. A data link is provided between the control units via a preselected one of the common signal lines. A check is made as to whether the preselected common signal line is operating normally or abnormally. When the preselected common signal line is operating abnormally, the preselected common signal line is replaced by another common signal line in the data link.
摘要:
An improved process for preparing a water-soluble polymer having an excellent water solubility and a high molecular weight, which comprises subjecting a thin layer of an aqueous solution of a water-soluble vinyl monomer to polymerization on a solid support, covering the thin layer with a substantially water-insoluble organic material, e.g. a paraffin, a silicone oil or a low molecular polyethylene, and/or a slightly water-soluble or substantially water-insoluble alkylene oxide adduct at least at a point of time when the aqueous monomer solution has not freely flowed, and further continuing the polymerization.
摘要:
A travel locus display device has a display unit such as a CRT display to display a start point and a destination point of a vehicle and a travel locus of the vehicle from the start point to the destination point on a coordinate display area of a display screen of the display unit. The display screen is divided into four quadrants, one of which is selected as a display quadrant to which the destination point belongs. The display quadrant is displyed over an entire area of the coordinate display area.
摘要:
A differential multilayer-coated steel strip having an excellent corrosion resistance, enamel-adhering property, seam weldability and drawability and being useful for the production of cans, comprising(A) a steel strip substrate;(B) a first surface coating formed on a surface of the substrate and comprising(a) a plated nickel first base layer formed on the substrate surface and consisting of from 10 to 5,000 mg/m.sup.2 of plated nickel,(b) a plated tin intermediate layer formed on the first base layer surface and consisting of from 50 to 11,000 mg/m.sup.2 of plated tin, and(c) a chromium-plated first surface layer formed on the intermediate layer surface and having a weight of from 3 to 50 mg/m.sup.2, in terms of metallic chromium; and(C) a second surface coating formed on the other surface of the substrate and comprising(d) a plated nickel second base layer formed on the other surface of the substrate and consisting of from 10 to 5,000 mg/m.sup.2 of plated nickel, and(e) a chromium-plated second surface layer formed on the second base layer surface and having a weight of from 3 to 50 mg/m.sup.2, in terms of metallic chromium.
摘要翻译:具有优异的耐腐蚀性,搪瓷附着性,缝焊性和拉伸性的差示多层涂覆钢带,可用于制造罐头,包括(A)钢带基材; (B)形成在所述基板的表面上的第一表面涂层,其包含:(a)在所述基板表面上形成的镀镍的第一基层,由10-5,000mg / m2的镀镍组成,(b)镀锡 中间层,形成在第一基底层表面上,由50〜11000mg / m 2的镀锡组成,(c)形成在中间层表面上并具有3〜50mg的重量的镀铬的第一表面层 / m2,以金属铬计; 和(C)形成在所述基板的另一个表面上的第二表面涂层,并且包括(d)形成在所述基板的另一个表面上并由10至5,000mg / m 2的镀镍组成的镀镍的第二基底层,以及 (e)形成在第二基层表面上并以金属铬换算为3至50mg / m 2的镀铬第二表面层。