1
John A Ewen, Abbas Razavi: Process and catalyst for producing syndiotactic polyolefins. Fina Technology, Stuart L Watt, John K Abokhair, M Norwood Cheairs, January 9, 1990: US04892851 (286 worldwide citation)

The invention provides a metallocene catalyst for use in preparing syndiotactic polyolefins. The catalyst comprises a bridged metallocene in which one of the cyclopentadienyl rings is substituted in a substantially different manner from the other ring. It was discovered that this type of catalyst is ...


2
Michael J Elder, Abbas Razavi, John A Ewen: Process and catalyst for producing syndiotactic polyolefins. Fina Technology, William D Jackson, Jim D Wheelington, October 13, 1992: US05155080 (134 worldwide citation)

Syndiospecific catalysts and processes for the syndiotactic propagation of a polymer chain derived from an ethylenically unsaturated monomer which contains 3 or more carbon atoms or is a substituted vinyl compound. The catalysts comprise an unbalanced metallocene cation, characterized by a cationic ...


3
Ewen John A, Razavi Abbas: Process and catalyst for producing syndiotactic polyolefins.. Fina Technology, January 17, 1990: EP0351392-A2 (90 worldwide citation)

The invention provides a metallocene catalyst for use in preparing syndiotactic polyolefins. The catalyst comprises a bridged metallocene in which one of the cyclopentadienyl rings is substituted in a substantially different manner from the other ring. It was discovered that this type of catalyst is ...


4
Michael J Elder, Abbas Razavi, John A Ewen: Process and catalyst for producing syndiotactic polyolefins. Fina Technology, William D Jackson, Jim D Wheelington, M Norwood Cheairs, July 6, 1993: US05225500 (72 worldwide citation)

Syndiospecific catalysts and processes for the syndiotactic propagation of a polymer chain derived from an ethylenically unsaturated monomer which contains 3 or more carbon atoms or is a substituted vinyl compound. The catalysts comprise an unbalanced metallocene cation, characterized by a cationic ...


5
Ewen John A, Elder Michael J, Razavi Abbas: Methode et catalyseur pour la preparation de polyolefines syndiotactiques, Process and catalyst for producing syndiotactic polyolefins. Fina Technology, Fina Technology, GOWLING LAFLEUR HENDERSON, July 24, 2001: CA2027144 (1 worldwide citation)

Syndiospecific catalysts and processes for thesyndiotactic propagation of a polymer chain derived from anethylenically unsaturated monomer which contains 3 or more carbonatoms or is a substituted vinyl compound. The catalysts comprisean unbalanced metallocene cation, characterized by a cationicmetal ...


6
Ewen John A, Razavi Abbas: Methode et catalyseur pour la preparation de polyolefines syndiotactiques, Process and catalyst for producing syndiotactic polyolefins. Fina Technology, GOWLING LAFLEUR HENDERSON, September 17, 1996: CA1338600

The invention provides a metallocene catalyst for use inpreparing syndiotactic polyolefins. The catalyst comprises abridged metallocene in which one of the cyclopentadienyl rings issubstituted in a substantially different manner from the otherring. It was discovered that this type of catalyst is hig ...


7
Abbas Razavi, John A Ewen, Michael J Elder: Process and catalyst for producing syndiotactic polyolefins. Fina Technology, ZHANG HENGKANG, August 14, 1991: CN90109370

Syndiospecific catalysts and processes for the syndiotactic propagation of a polymer chain derived from an ethylenically unsaturated monomer which contains 3 or more carbon atoms or is a substituted vinyl compound. The catalysts comprise an unbalanced metallocene cation, characterized by a cationic ...


8
John A Ewen: Process and catalyst for producing syndiotactic polyolefins. Fina Technology, WU HUIZHONG, February 28, 1990: CN89104461

The invention provides a metallocene catalyst for use in preparing syndiotactic polyolefins. The catalyst is generally described by the formula R'' (CpRn)(CpR min m)MeQk wherein each Cp is a cyclopentadienyl or substituted cyclopentadienyl ring; each Rn and R' m is the same or different and is a hyd ...