摘要:
Use of a metallocene compound of the general formula: Ind2R''MQ2 as a component of a catalyst system for the production of a polyethylene copolymer substantially in the absence of comonomer, wherein each Ind is the same or different and is indenyl or substituted indenyl; R'' is a bridge which comprises a C1 to C4 alkylene radical, a dialkyl germanium or silicon or siloxane, alkyl phosphine or amine, which bridge is substituted or unsubstituted, M is Group IV metal or vanadium and each Q is hydrocarbyl having 1 to 20 carbon atoms or halogen; and the ratio of meso to racemic forms of the metallocene in the catalyst system is at least 1:3.
摘要:
The invention relates to catalyst systems and to their use for polymerising propylene. The inventive catalyst system contains at least one metallocene in the form of a rac-meso-isomer mixture, at least one organoboroaluminium compound, at least one inert support, at least one Lewis base and optionally, at least one other organometallic compound.
摘要:
Single component metallocene catalysts for α-olefin polymerization are disclosed. Prior art cation metallocene catalysts have required a separate anion co-catalyst like methyl aluminoxane (MAO). However, because the inventive zwitterion ansa metallocene (ZAM) catalysts have a 'built-in' anion co-catalyst functionality, the need for a separate anion co-catalyst is eliminated.
摘要:
This invention relates to supported metallocene catalyst systems and to methods for their production and use. Specifically, this invention relates to supported catalyst systems having unique, predetermined properties resulting from the designed distribution of catalyst components within and upon porous support particles. The methods of this invention are particularly well suited for the support of two or more metallocenes.
摘要:
This invention relates generally to supported metallocene catalyst systems and to methods for their production and use. Specifically, this invention relates to a method for preparing supported metallocene catalyst systems using an aliphatic solvent. The catalyst systems prepared by these methods exhibit increased activity.
摘要:
Stereospecific catalysts and processes for the stereotactic polymerization of ethylenically unsaturated monomers, specifically C 3 -C 4 alpha olefins involving a molecular sieve supported metallocene catalyst comprising a stereospecific metallocene catalyst component and a co-catalyst component. The metallocene catalyst component incorporates a metallocene ligand structure having two sterically dissimilar cyclopentadienyl ring structures coordinated with the central transition metal atom. Both the metallocene catalyst component and the co-catalyst component are supported on a molecular sieve having an average effective pore size which is less than the kinetic diameter of at least one of said ring structures. This supported catalyst is contacted in a polymerization reaction zone with an ethylenically unsaturated monomer which contains 3 or more carbon atoms or which is a substituted vinyl compound under polymerization conditions to produce stereospecific polymerization of the monomer. The supported catalyst incorporates a molecular sieve support having an average effective pore size within the range of 5-10 angstroms. The metallocene component can be an unbalanced metallocene having a ligand structure in which stereorigidity is imparted by means of a structural bridge extending between dissimilar cyclopentadienyl groups, for example, a fluorenyl group, a cyclopentadienyl group, of a ligand which exhibits bilateral symmetry. The specific zeolite supports are zeolite Y, zeolite X, mordenite, and zeolite β. Others include various zeolites of the ZSM substitutional series, including ZSM-5, ZSM-11, and ZSM-12.
摘要:
Die vorliegende Erfindung betrifft ein Metallocen mit der allgemeinen Formel I, zur Herstellung von Polyolefinen, worin bevorzugt M 1 Zr, Hf oder Ti ist, R 1 und R 2 ein Wasserstoffatom, eine C 1 -C 3 -Alkyl-, C 1 -C 3 -Alkoxy-, C 6 -C 8 -Aryl-, C 6 -C 8 -Aryloxy-, C 2 -C 4 -Alkenyl-, C 7 -C 10 -Arylalkyl-, C 7 -C 12 -Alkylaryl-, C 8 -C 12 -Arylalkenylgruppe oder Chlor bedeuten, R 3 ein Chlor, eine C 1 -C 3 -Alkyl-, C 2 -C 4- Alkenyl-, C 6 -C 8 -Arylgruppe, einen NR 16 2 -, SR 16 -, OSiR 16 3 -, SiR 16 3 - oder PR 16 2 -Rest, worin R 16 Chlor, eine C 1 -C 4 -Alkyl- oder C 6 -C 8 -Arylgruppe bedeutet. R 4 ein Wasserstoffatom bedeuten, R 13 -(R 14 M 2 R 15 )-, -(R 14 CR 15 )-(R 14 CR 15 )-, -(R 14 CR 15 )-(R 14 M 2 R 15 )- oder -(R 14 CR 15 )- bedeutet, wobei R 14 und R 15 ein Wasserstoffatom, Chlor, eine Si(methyl) 3 -, N(methyl) 2 -, N(phenyl) 2 -, Si(phenyl) 3 -, B(methyl) 2 -, B(phenyl) 2 -, C 1 -C 4 -Alkyl-, insbesondere Methyl-, CF 3 -, C 6 -C 12 -Aryl-, Pentafluorphenyl-, C 1 -C 4 -Alkoxy-, insbesondere Methoxy-, C 2 -C 4 -Alkenyl-, C 7 -C 10 -Arylalkyl-, C 8 -C 12 -Arylalkenyl- oder C 7 -C 12 -Alkylarylgruppe bedeuten, oder R 14 und R 15 jeweils mit dem sie verbindenden Atomen einen Ring bilden, M 2 Silizium oder Germanium ist, z 0 oder 1 ist, R x und R y gleich sind, wobei R 5 bis R 9 die Bedeutung von R 14 haben und l + m + n + o + p ≥ 2 und ≤ 5 , und l + n + p ist ≥ 1 ist, wobei l, n, m, o oder p 0, 1, 2 oder 3 sein können oder R 5 bis R 9 mit den sie verbindenden Atomen einen oder mehrere Ringe bilden.
摘要翻译:要求保护式(I)的金属茂,其中M 1 = a IVb族,Vb或VIb族金属; R 2,R 2 = H,1-40C烃基如1-10C烷基或烷氧基,2-10C烯基,6-10C芳基或芳氧基,7-40C芳烷基或烷芳基,或8-40C芳烯基 ,OH或卤素; R 3,R 4 = H,卤素,1-20C烃基如1-10C烷基,2-10C烯基或6-10C芳基或N(R 16)2,SR 16, ,OSi(R 16)3,Si(R 16)3或P(R 16)2(其中R 16 =卤素,1-10C烷基或6-10C芳基); R 13 =桥接基团,例如-A-,-AA-,-QQ-,-OAO-,-Q-,-OA-,-QA-,-QQQ-,= BR 14,= AlR 14,-Ge-,-O - , - S - ,= SO,= SO 2,= NR 14,= CO,= PR 14或= P(O)R 14; A = -M 2 R 14 R 15 - ; Q = -CR 14 R 15 - ; R 14,R 15 = H,卤素,或含有SiF 3,NR 2或BR 2(R = 1-10C烷基或6-20C芳基)的含1-40C碳的基团,1-10C烷基, 氟烷基或烷氧基,氟代芳基的6-20C芳基,2-10C烯基,7-40C芳烷基或烷芳基,或8-40C芳烯基,或R 14 + R 15可以与连接原子形成环; M 2 = Si,Ge或Sn; z = 0或1; R f = - (CR 5)1 - (CR 6 = CR 6)m - (CR 7)n - (CR 8 = CR 8) ) - (CR 9)p - ,其中R 5 -R 9 = R 14和R 15; l + m + n + o + p = 2-6; l + n + p =至少1; l,m,n,o,p = 0,1,2,3或4; 指标m或o中的至少一个不为零; 组合m = 0,o = 0和l + n + p = 4,组合l = 0,n = 0,p = 0和m + o = 2。 还要求保护的是(i)制备(I)的方法,(ii)含有(a)茂金属(I)和(b)助催化剂的催化剂的方法,和(iii)生产方法 的聚烯烃。