摘要:
An ethylene-.alpha.-olefin copolymer having;(A) a density (.rho.) of from 0.870 to 0.945 g/cm.sup.3,(B) a ratio (TVR) of trans-vinylene type carbon-carbon double bonds to total cabon-carbon double bonds as determined with an infrared absorption spectrum being 35% or more, and(C) a weight average molecular weight (Mw) of from 3.0.times.10.sup.4 to 6.0.times.10.sup.5, and a molded article comprising thereof. The present invention provides an ethylene-.alpha.-olefin copolymer and a molded article comprising thereof having an excellent transparency, high gloss and high melt tension.
摘要:
A liquid catalyst component which can be used as a component of a catalyst system in combination with an organoaluminum compound (B) for producing ethylene-.alpha.-olefin copolymers.
摘要:
A process for producing an ethylene-.alpha.-olefin copolymer which comprises copolymerizing ethylene and an .alpha.-olefin at a temperature higher than 120.degree. C. by using a catalyst system comprising a specified titanium amide compound represented by general formula (R.sup.1 R.sup.2 N).sub.4-n TiY.sub.n and an oxygen-containing alkylaluminum compound. According to the above process, there can be obtained ethylene-.alpha.-olefin copolymers narrow in composition distribution, high in molecular weight and excellent in weather resistance, colorizability, corrosion resistance and dynamic properties.
摘要:
The present invention provides a diaryl sulfone compound represented by Formula (1): wherein R1 to R4 and R1′ to R4′ are the same or different, and each represents hydrogen, C1-4 alkyl, or halogen, and R5 represents C2-6 alkenyl, C1-4 alkyl, or aromatic heterocyclic group; a method for producing the diaryl sulfone compound represented by Formula (1) by reacting a 4,4′-dihaloarylsulfone compound with thiol salt compound having an alkylene group; and a method for producing the diaryl sulfone compound represented by Formula (1) by reacting a 4,4′-dihaloarylsulfone compound with a thiol salt compound having a hydroxyl group, and subjecting the resulting compound to reaction with a halogenating agent, followed by a dehydrohalogenation reaction.
摘要:
The present invention provides a diaryl sulfone compound represented by Formula (1): wherein R1 to R4 and R1′ to R4′ are the same or different, and each represents hydrogen, C1-4 alkyl, or halogen, and R5 represents C2-6 alkenyl, C1-4 alkyl, or aromatic heterocyclic group; a method for producing the diaryl sulfone compound represented by Formula (1) by reacting a 4,4′-dihaloarylsulfone compound with thiol salt compound having an alkylene group; and a method for producing the diaryl sulfone compound represented by Formula (1) by reacting a 4,4′-dihaloarylsulfone compound with a thiol salt compound having a hydroxyl group, and subjecting the resulting compound to reaction with a halogenating agent, followed by a dehydrohalogenation reaction.
摘要:
According to one embodiment, an image forming apparatus includes: a light source unit including light emitting elements for red, green, and blue; an image pickup section configured to receive, from a reference board on which light from the light source unit is irradiated, reflected light to pick up an image of the reference board; and a control section configured to control the light emitting elements of the light source unit to separately emit light, acquire separate data picked up by the image pickup section, select data having a smallest luminance value among the separate data, and control light amounts of all the light emitting elements of the light source unit with the selected data set as a reference.
摘要:
A borate single crystal which can stably perform light wavelength conversion with high efficiency down to the ultraviolet region is represented by the chemical formula (A2O).(B2O3)x, and is an orthorhombic crystal belonging to the P212121 space group, wherein A includes two elements selected from the group consisting of Li, Na, K, Rb, and Cs, and 1.5
摘要翻译:可以通过化学式(A 2 O)(B 2 O 3)x表示能够以高效率稳定地进行紫外线区域的光波长转换的硼酸盐单晶,并且是属于P212121空间群的正交晶体,其中A包括两个 元素选自Li,Na,K,Rb和Cs,以及1.5
摘要:
An olefin polymer characterized by having (A) a density of from 0.850 to 0.940 g/cm3, (B) a melt flow rate (MFR) of from 0.1 to 200 g/10 minutes, and (C) a relation between the melt flow rate (MFR) and an intrinsic viscosity [&eegr;] measured in tetralin at 135° C. satisfying the range of the following equation (1): −4.04 log [&eegr;]+0.6≦log MFR≦−4.04 log [&eegr;]+0.96 (1) and its a film or sheet, and a method for producing an olefin polymer characterized by homopolymerizing an olefin or copolymerizing two or more olefins, with a catalyst for olefin polymerization, comprising: (A) a transition metal complex represented by the general formula [I] below; (B) at least one aluminum compound selected from (B1) to (B3); and/or (C) at least one boron compound selected from (C1) to (C3), at a temperature of at least 130° C. under a pressure of at least 300 kg/cm2G.
摘要:
A process for polymerizing ethylene at a high temperature under high pressure, which comprises contacting ethylene alone or along with an .alpha.-olefin at a temperature of 120.degree. C. or more at a pressure of 350 kg/cm.sup.2 or more with a catalyst consisting essentially of (A) a reaction product of (A1) a titanium compound having at least one titanium-nitrogen bond with (A2) an organometallic compound of an element of Groups I to III of the Periodic Table and (B) an organoaluminum compound. Said process enables the production of an ethylene polymer or copolymer having a narrow composition distribution and a high molecular weight and being excellent in weather resistance, color development, transparency, corrosiveness and mechanical properties.
摘要翻译:一种在高压下在高温下聚合乙烯的方法,其包括在150℃或更高的温度下,以350kg / cm 2或更高的压力使乙烯单独或与α-烯烃接触,催化剂基本上与 (A)(A1)具有至少一个钛 - 氮键的钛化合物与(A2)元素周期表第I至III族元素的有机金属化合物和(B)有机铝化合物的反应产物。 所述方法能够制备具有窄组成分布和高分子量并且耐候性,显色性,透明性,腐蚀性和机械性能优异的乙烯聚合物或共聚物。
摘要:
An olefin polymerization catalyst comprising:(A) a solid catalyst component containing a trivalent titanium, which is represented by the composition formulaMg.sub.m Ti(OR).sub.n X.sub.p [ED].sub.q (wherein R is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen, ED is a electron donative compound, and m, n, p and q are each a number satisfying 1.ltoreq.m.ltoreq.51, 0