Metallocene compounds, catalysts comprising them, process for producing an olefin polymer by use of the catalysts, and olefin homo- and copolymers
申请人:Lammus Novolen Technology GmbH
公开号:US08299287B2
公开(公告)日:2012-10-30
Certain metallocene compounds are provided that, when used as a component in a supported polymerization catalyst under industrially relevant polymerization conditions, afford high molar mass homo polymers or copolymers like polypropylene or propylene/ethylene copolymers without the need for any α-branched substituent in either of the two available 2-positions of the indenyl ligands. The substituent in the 2-position of one indenyl ligand can be any radical comprising hydrogen, methyl, or any other C2-C40 hydrocarbon which is not branched in the α-position, and the substituent in the 2-position of the other indenyl ligand can be any C4-C40 hydrocarbon radical with the proviso that this hydrocarbon radical is branched in the β-position. This metallocene topology affords high melting point, very high molar mass homo polypropylene and very high molar mass propylene-based copolymers. The activity/productivity levels of catalysts including the metallocenes of the present invention are exceptionally high.
METALLOCENE COMPOUNDS, CATALYSTS COMPRISING THEM, PROCESS FOR PRODUCING AN OLEFIN POLYMER BY USE OF THE CATALYSTS, AND OLEFIN HOMO-AND COPOLYMERS
申请人:Dimeska Anita
公开号:US20100267907A1
公开(公告)日:2010-10-21
Certain metallocene compounds are provided that, when used as a component in a supported polymerization catalyst under industrially relevant polymerization conditions, afford high molar mass homo polymers or copolymers like polypropylene or propylene/ethylene copolymers without the need for any α-branched substituent in either of the two available 2-positions of the indenyl ligands. The substituent in the 2-position of one indenyl ligand can be any radical comprising hydrogen, methyl, or any other C
2
-C
40
hydrocarbon which is not branched in the α-position, and the substituent in the 2-position of the other indenyl ligand can be any C
4
-C
40
hydrocarbon radical with the proviso that this hydrocarbon radical is branched in the β-position. This metallocene topology affords high melting point, very high molar mass homo polypropylene and very high molar mass propylene-based copolymers. The activity/productivity levels of catalysts including the metallocenes of the present invention are exceptionally high.
Aromatic Substituted Group 4 Metallocene Catalysts for the Polymerization of α-Olefins
作者:Patrick Foster、James C. W. Chien、Marvin D. Rausch
DOI:10.1021/om960519x
日期:1996.11.12
Six new group4metallocene complexes were synthesized as precursors for the polymerization of α-olefins. The phenyl-substituted precursors 2b−4b when activated by methylaluminoxane (MAO) were highly active for the polymerization of ethylene but exhibited no activity for the polymerization of propylene. Bis(2-methylbenz[e]indenyl)zirconium dichloride (5b) was activated with both MAO and triphenylcarbenium
合成了六个新的第4组茂金属配合物,作为α-烯烃聚合的前体。当被甲基铝氧烷(MAO)活化时,苯基取代的前体2b - 4b对乙烯的聚合具有高活性,但对丙烯的聚合则没有活性。双(2-甲基苯并[ e ]茚基)二氯化锆(5b)被MAO和三苯基碳四(五氟苯基)硼酸酯(三苯甲基)/三异丁基铝活化,其分子量根据聚合温度而变化。与锆类似物5b相比,钛前体6b对乙烯的活性较低。 当被MAO或三苯甲基活化时,对丙烯几乎没有活性。
Process of preparing 2-alkyl-2,3-dihydro-1H-benz \x9be!indene-1-one
申请人:Akzo Nobel N.V.
公开号:US05942636A1
公开(公告)日:1999-08-24
The invention relates to a process of preparing a 2-alkyl-2,3-dihydro-1H-benz\x9be!indene-1-one derivative, preferably 2,3-dihydro-2-methyl-benz\x9be!indene-1-one, characterized in that a naphthalene derivative is condensed with an active ester of 2-alkyl-2-propenoic acid, preferably with 2-methyl-2-propenoyl chloride. The product which is obtained in high yield and substantially free from its isomer is an intermediate in the preparation of rac-dimethyl bis(2-alkyl-1H-benz\x9be!indenyl)silandiyl zirconium dichloride complex.