摘要:
A titanium trichloride catalytic complex is produced by reducing titanium tetrachloride with an organo-metal compound and then treating the resulting reduced solids product with a chlorinated saturated hydrocarbon having two carbon atoms in the presence of a complexing agent. The resulting titanium trichloride complex composition, when employed as a co-catalyst with an organo-metal compound for Ziegler-type catalysts in polymerization of .alpha.-olefins, results in uniform polymer grains with unexpectedly high polymerization activity and high stereoregular polymer yielding ratios.
摘要:
A supported titanium catalyst is produced by cogrinding, in combination, a magnesium halide, tetravalent titanium halide, organic acid ester, and an organic halogen compound. The resulting supported titanium catalyst, when employed as a titanium component with an organo aluminum catalyst component for the catalyst system in a process for stereoregular polymerization of .alpha.-olefins, produces high polymerization activity and unexpectedly high stereoregular polymer yielding ratios.
摘要:
A can end sealing rubber composition(A) consisting essentially of a styrene-butadiene rubbery copolymer, a tackifier and a filler, and(B) having (1) a creep resistance coefficient K defined by the following equation of at least 0.1 but not exceeding 0.6,K=log J.sub.90.sup.C (10)-log J.sub.90.sup.C (1) wherein J.sub.90.sup.C (10) is the creep compliance measured 10 minutes after exerting a load when a fabricated article of the composition as a specimen is compressed in water at 90.degree. C. by a parallel plate plastometer, and J.sub.90.sup.C (1) is the creep compliance measured 1 minute after exerting a load when the specimen is compressed in water at 90.degree. C. by a parallel plate plastomer,and (2) a creep compliance J.sub.25.sup.C (1) of at least 3.times.10.sup.-9 cm.sup.2 /dyne but not exceeding 1.times.10.sup.-6 cm.sup.2 /dyne, the creep compliance being measured 1 minute after exerting a load when the specimen is compressed in water at 25.degree. C. by a parallel plate plastometer.
摘要翻译:一种基本上由苯乙烯 - 丁二烯橡胶共聚物,增粘剂和填料组成的罐端密封橡胶组合物(A)和(B)具有(1)由下式定义的抗蠕变系数K至少为0.1但不超过 0.6,K = log J90C(10)-log J90C(1)其中J90C(10)是在作为样品的组合物的制品在90℃的水中压缩时施加负荷后10分钟测量的蠕变柔量。 J90C(1)是当试样在90℃的水中通过平行板塑性体压缩后施加载荷1分钟后测得的蠕变柔量,(2)蠕变顺应性J25C(1) )为至少3×10 -9 cm 2 /达因但不超过1×10 -6 cm 2 /达因,当试样在25℃的水中通过平行平板式塑性计压缩时,在施加载荷1分钟后测量蠕变柔量。
摘要:
The invention relates to a method for preparing a catalyst composition for polymerization of propylene, having high activity and producing polypropylene of high stereoregularity in narrow particle size distribution, which comprises:1. reducing TiCl.sub.4 by a mixture of diethylaluminum chloride (DEAC) and ethylaluminum dichloride (EADC), thereby forming a reduced solid (TiCl.sub.3),2. removing the aluminum compound from the reduced solid;3. treating the said reduced solid with a mixture or complex of TiCl.sub.4 and diisoamylether (IAE), and4. separating the solid catalyst from the solution.Preferably step 2 is performed by washing with a complexing agent for the aluminum compound.
摘要:
A heavy duty detergent powder and a process for producing the heavy duty detergent powder which comprises neutralizing a fatty acid having, optionally, dissolved therein at least one nonionic surface active agent with a powdered hydrous sodium carbonate at a temperature higher than the melting point of the fatty acid are disclosed.
摘要:
An adhesive composition for bonding together metal sheets in an extremely short time, which is an intimate mixture of (I) nylon 66, nylon 6, nylon 610, nylon 11 or nylon 12 and (II) a semicrystalline copolyamide such as a copolyamide of hexamethylene diammonium adipate, hexamethylene diammonium sebacate and 6-amino-caproic acid, in a ratio by weight of (I):(II) from 99:1 to 90:10.
摘要:
A transmission rate of a control message between a switch and a switch controller can be reduced. A network system includes the switch which transfers a packet based on a switch flow table, the switch controller and a front-end unit which relays the control message between the switch controller and the switch. The front-end unit includes a buffer, a flow table storage section and a buffer control section which buffers the control message which hits a buffer flow entry of the flow table in the buffer.
摘要:
The invention relates to a powdered milk product includes angiogenin and/or angiogenin hydrolysate in an amount of 1.4 to 24 mg/15 g, and lactoperoxidase and/or lactoperoxidase hydrolysate in the mass ratio to the angiogenin and/or angiogenin hydrolysate of 0.35 to 10.
摘要:
An intake camshaft device 1 includes an intake camshaft, a first rolling bearing and a second rolling bearing for rotatably supporting both end parts of the intake camshaft, and a first sliding bearing and a second sliding bearing for rotatably supporting the intake camshaft between the first and second rolling bearings. The first rolling bearing is arranged in a same plane as a rotation plane of a sprocket for an intake cam. In other words, the first rolling bearing is positioned in a plane which is overlapped with a plurality of teeth of the sprocket for the intake cam, and perpendicular to a center axis. The first sliding bearing is disposed adjacent to the first rolling bearing backward in an axial direction.
摘要:
In a network system, each server is assigned to at least one relay processing devices. A plurality of switches are arranged in a network and a controller controls the switches. Specifically, the controller designs, in response to a request from a request source switch, a route of a flow from the request source switch to a destination address. Here, the controller refers to assignment information indicating an assignment relationship between servers and relay processing devices to select, as a target, any one relay processing device assigned to a server specified by the destination address, and designs the route so as to include the target. Then, the controller instructs each switch on the designed route to set the flow table such that a packet is forwarded along the designed route.