Abstract:
PROBLEM TO BE SOLVED: To provide a polyethylene film which is manufactured from the polyethylene in which the processing is easier than that of the linear low density polyethylene manufactured by a conventional metallocene catalyst (mLLDPE), which has high machine direction tear strength (MD tear strength) and/or high transversal direction tear strength (TD tear strength) and/or high dart drop impact. SOLUTION: A polyolefin film comprises a linear low density polyethylene (LLDPE) manufactured by the gas phase process using a substituted hafnium transition metal metallocene catalyst system, and has ≥0.9 of a MD tear strength to a TD tear strength ratio (both tear strengths are determined by ASTM D-1922), ≥350 g/mil (8,890 g/μ) of a MD tear strength, ≥500 g/mil (12,700 g/μ) of a dart drop impact(determined by ASTM D-1709) and ≥70% MD shrinkage rate, wherein the film properties can be attained when the extrusion amount is ≥12 pound/hour/inch die circumference (16.00 kg/hour/cm die circumference). COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To control a proportion of weight fractions in an olefin resin product having a broad or bimodal molecular-weight distribution using a make-up catalyst having at least one metallic component of bimetallic catalyst components together with a bimetallic catalyst. SOLUTION: The bimetallic catalyst produces a broad or bimodal molecular weight distribution polyolefin resin whose composition depends on a ratio of the concentration of two catalyst components producing a HMW/LMW component. The make-up catalyst including a single metal component is added in an amount necessary to make-up the deficiencies in an amount of the HMW/LMW component. The type of the make-up catalyst added depends on whether increase of the HMW or LMW component produced by the bimetallic catalyst is sought or not. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To produce medium and high density polyethylenes at commercially attractive productivities, especially polyethylenes useful in rotomolding and injection molding applications.SOLUTION: A method of polymerizing olefins comprises: combining ethylene, at a partial pressure of at least 1,300 kPa, and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor, at a pressure of less than 10,000 kPa, wherein the catalyst composition comprises a hafnocene; and isolating a polyethylene having a density in the range from 0.935 to 0.975 g/cm.
Abstract translation:要解决的问题:以商业上有吸引力的生产率生产中高密度聚乙烯,特别是可用于滚塑和注射成型应用的聚乙烯。 解决方案:聚合烯烃的方法包括:在连续聚合反应器中以小于10,000的压力将乙烯在至少1,300kPa的分压下和任选的一种或多种α-烯烃与催化剂组合物组合 kPa,其中催化剂组合物包含铪茂; 并且分离密度在0.935至0.975g / cm 3范围内的聚乙烯。 版权所有(C)2013,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a catalyst composition, to provide its preparation method, to provide a method for using the catalyst composition in an olefin polymerization process, and to provide a method for preparing a catalyst composition comprising a bulky ligand metallocene type catalyst system and/or a conventional transition metal catalyst system, and a metal carboxylate. SOLUTION: The bulky ligand metallocene-type catalyst system-carried type catalyst is combined, contacted and blended with the metal carboxylate, and then used in an olefin polymerization gas phase or slurry phase process. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide the use of aluminum alkyl activators and co-catalysts to improve the performance of chromium-based catalysts. SOLUTION: The aluminum alkyls allow for the variable control of polymer molecular weight and control of side chain branching while possessing desirable productivity, and may be applied to the catalyst directly or separately to a reactor. Adding the alkyl aluminum compound directly to the reactor (in situ) eliminates the induction time. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an olefin polymerization method using a catalyst system containing polymerization catalyst compounds for producing polymer and polymer blend, low in comonomer incorporation and having high activity and high performance. SOLUTION: The olefin polymerization method for producing polymer products comprises bringing ethylene and at least one comonomer into contact with a catalyst system, wherein the catalyst system comprises a poor comonomer incorporating catalyst compound having at least one fused ring cyclopentadienyl-based ligand and a good comonomer incorporating catalyst compound, the poor comonomer incorporating catalyst compound produces higher density polyethylene than bisindenyl zirconium dichloride (Ind) 2 ZrCl 2 when producing on the same process conditions and is a polymerization catalyst requiring at least two times comonomer/monomer molar ratio of the good comonomer incorporating catalyst compound when producing the same density polymer, and the polymer products have bimodal composition distribution. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an ethylene copolymer having a widened molecular weight distribution, and a film which is excellent in mechanical properties and is obtained from the resin. SOLUTION: Using a hafnium metallocene-type catalyst where a substituent on a bulky ligand or a moiety is the substituent having three or more non-hydrogen atoms, preferably three or more carbon atoms, more preferably an alkyl substituent, for example n-propyl or n-butyl, the ethylene copolymer is produced and the film is produced using the resin. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract in simplified Chinese:提供一种触媒组成物,其包括具有改良粒径分布之载体材料。也提供制备聚烯烃组成物之方法。也提供聚合物和薄膜。触媒组成物之一例子为一种受载多过渡金属触媒组成物,其包括:(a)至少二种触媒成分,其系选自由非二茂金属触媒成分和二茂金属触媒成分所组成之群组;(b)载体材料,其具有小于约30微米之D50和小于约6之D90/D10比的粒径分布;和(c)活化剂。
Abstract in simplified Chinese:本发明系有关一种制备经氟化触媒化合物的方法、触媒组成物及包括其之聚合方法。至少一个本发明之特定具体实施例包括使一种经氯化二茂金属触媒成分与一种经氟化无机盐接触,经足以形成一种经氟化二茂金属触媒成分例如下例所述之时间:其中R在一特定具体实施例中为选自C1到C10烷基之取代基,及p为0或1至5之整数。在一特定具体实施例中经氟化无机盐之特征在作为一种当与至少50重量%水的稀释剂接触时产生至少一个氟离子之化合物。