摘要:
A storage battery (10) comprises several cells (1) enclosed within a housing, each cell containing electrolyte and plates coated with positive mass, negative mass, and positive and negative mass on different sections thereof. The cells are separated from each other with separator plates (14), and the requisite electrically conducting connectors are provided for connecting the plates and/or cells. Each cell (11) contains positive and negative plates (12,13,15). Each cell (11) is packed in an individual electrically insulating housing (16) so that merely the ends (12a,13a) of the plates (12,13) need to be electrically interconnected, respectively. The ends (12b, 13b) of the plates (12,13) are connected to the terminals (17,18) which emerge from the housing (16) to be electrically connected. For providing electrical conductivity, the spaces between the cells (11) and the end walls of the outer cells (11) are made electrically conductive with an electricity conduction joint (19).
摘要:
The present invention concerns a catalyst system and a process for selectively producing alcohols from olefines and synthesis gas. The catalyst system comprises one or several metal cluster compounds belonging to the cobalt group on an inorganic carrier and an amine of the form NR.sub.1 R.sub.2 R.sub.3, where R.sub.1,R.sub.2 and R.sub.3 are either hydrogen or an aliphatic or aromatic group containing 1 to 8 carbon atoms.
摘要:
The present invention relates to an olefin copolymer composition, which olefin copolymer composition contains (A) 25 to 97 wt. % of a propylene copolymer, and (B) 75 to 3 wt. % of a butene-1 copolymer having a content of .alpha.-olefin unit with 2 to 8 carbon atoms of 1 to 35 mol %, an intrinsic viscosity of 0.9 to 7.2 dl/g measured in decalin heated to 150.degree. C., a value of weight-average molecular weight/number-average molecular weight of 4 to 15, a temperature difference of 2.degree. to 40.degree. C. between the highest value and the lowest value of the melting point measured by the differential scanning calorimetric analysis, and a .alpha.-olefin block property of 0.015 or lower measured by the nuclear magnetic resonance spectral analysis, can provide molded items excellent, for example, in heat-sealing properties, transparency, blocking resistance, and surface gloss, and is good in processability.
摘要:
The invention concerns a fixed spike or a sleeve-mounted spike, fitted on a vehicle tire. The fixed spike or sleeve-mounted spike (20) has been so shaped that when the spike is in its state at rest, its region (A) in contact with rubber (14) is substantially smaller than the total surface area of the respective region of the spike. Flow, caused by the visco-elastic properties of the rubber (14), of the rubber (14) around the fixed spike or the sleeve-mounted spike (20), is arranged to soften the first contact between the tip (23) of the fixed spike or rivet (21) of the sleeve-mounted spike (20) and the road surface.
摘要:
This invention provides a process for producing a blown film of butene-1 polymer excellent in elasticity, elastic recovery, impact strength and the like which includes extruding a butene-1 polymer having a melt index of 0.3-10 g/10 min in a tubular form from extrusion die at an extrusion temperature of 120.degree.-250.degree. C. and then inflation molding the tubular film under the conditions that frost line height is 38-100 cm, stretch ratio in machine direction is 5 or more and ratio of stretch ratio in machine direction/stretch ratio in transverse direction is 2.5 or more.
摘要:
The present invention concerns a sleeve-mounted spike. The sleeve (14) of the substantially symmetric sleeve-mounted spike (10) is provided with an oblique hole (15) for a rivet, the sleeve-mounted spike (10) being arranged, at first contact with the road surface (18), to meet the surface of the road (18) in a substantially upright position.
摘要:
The carbamate content of cellulose carbamate products is reduced by treating such products with solutions of a base, which solution also contains one or several alkali metal salts, particularly carbonates, sulfates, phosphates, borates and acetates.
摘要:
A procedure for producing hydroquinone from a hydrocarbon mixture obtained as a by-product when producing cumene, by selectively oxidizing tertiary alkylaromatics to form hydroperoxides, by separating the dihydroperoxide of p-diisopropylbenzene from the oxidation product by selective crystallization through cooling, and by decomposing the dihydroperoxide of p-diisopropylbenzene with the aid of an acid catalyst to form the hydroquinone.
摘要:
A bolt-like fixing assembly for use in improving the strength and/or stability characteristics of rock structure, such as for reinforcing rocks, includes an elongate structure one end of which is adapted to be fixed within a bore formed in a rock and a device for fixing the other end of the elongate structure to the surface of the rock. According to aspects of the invention, the elongate structure is constituted of at least two rod-like members and a fixing device of the elongate structure is constituted by a wedge-shaped member and a bearing plate, such as a washer. The elongate structure is preferably constituted of three rod-like members, each of which preferably is constituted of a bulb steel rod.
摘要:
An alkali-soluble cellulose derivative is produced by treating cellulose with liquid ammonia having urea dissolved therein, removing the ammonia, resulting in cellulose having urea distributed therethrough, and heating the thus obtained cellulose-urea to cause reaction between the urea and cellulose and form alkali-soluble cellulose carbamate. This cellulose carbamate can be precipitated from alkaline solution in the form of cellulose carbamate film or fiber.