1
Helmut G Alt, Syriac J Palackal, Konstantinos Patsidis, M Bruce Welch, Rolf L Geerts, Eric T Hsieh, Max P McDaniel, Gil R Hawley, Paul D Smith: Organometallic fluorenyl compounds, preparation, and use. Phillips Petroleum Company, Edward L Bowman, July 25, 1995: US05436305 (105 worldwide citation)

Fluorenyl-containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition, polymers resulting from such polymerizations are disclosed.


2
M Bruce Welch, Helmut G Alt, Bernd Peifer, Syriac J Palackal, Gary L Glass, Ted M Pettijohn, Gil R Hawley, Darryl R Fahey: Method for making and using a supported metallocene catalyst system. Phillips Petroleum Company, Edward L Bowman, March 12, 1996: US05498581 (104 worldwide citation)

Methods are disclosed for preparing a highly active solid metallocene-containing catalyst system and its use in the polymerization of olefins. The catalyst system is prepared by creating a catalyst system solution by combining an aluminoxane with a metallocene having a substituent which has olefinic ...


3
Helmut G Alt, Konstantinos Patsidis, M Bruce Welch, Rolf L Geerts, Bernd Peifer, Syriac J Palackal: Metallocenes and processes therefor and therewith. Phillips Petroleum Company, Lucas K Shay, March 21, 1995: US05399636 (102 worldwide citation)

A composition is provided comprising a metallocene having the formula of: ##STR1## wherein each Z can be the same or different hydrocarbyl radical selected from the group consisting of cyclopentadienyl, indenyl, tetrahydroindenyl, fluorenyl, and mixtures thereof; each X can be the same or different ...


4
Konstantinos Patsidis, Bernd Peifer, Syriac J Palackal, Helmut G Alt, M Bruce Welch, Rolf L Geerts, Darryl R Fahey, Harold R Deck: Vinly-substituted bridged metallocenes. Phillips Petroleum Company, E L Bowman, October 15, 1996: US05565592 (85 worldwide citation)

A method is provided for forming a supported cyclopentadiene-type compound comprising contacting a cyclopentadiene-type compound containing an active halogen with an inorganic support having surface hydroxyl group. Also there is provided a method of preparing a supported metallocene comprising react ...


5
M Bruce Welch, Rolf L Geerts, Syriac J Palackal, Ted M Pettijohn: Process for producing broad molecular weight polyolefin. Phillips Petroleum Company, Edward L Bowman, January 14, 1997: US05594078 (76 worldwide citation)

A catalyst system comprising a bridged fluorenyl-containing metallocene, an unbridged metallocene, and a suitable cocatalyst and the use of such catalyst systems to produce olefin polymers. Also novel olefin polymers produced by those processes.


6
Syriac J Palackal, Helmut G Alt, Konstantinos Patsidis, Tara G Hill, Gil R Hawley, Peter P Chu, M Bruce Welch, Rolf L Geerts: Olefin polymerization using silyl-bridged metallocenes. Phillips Petroleum Company, Edward L Bowman, March 28, 1995: US05401817 (70 worldwide citation)

Fluorenyl-containing silyl bridged metallocenes, the process of using such metallocenes to polymerize olefins, and the resulting unusual syndiotactic polypropylene are disclosed.


7
Helmut G Alt, Syriac J Palackal, Roland Zenk, M Bruce Welch, Michael Schmid: Organometallic fluorenyl compounds and use thereof in an alpha-olefin polymerization process. Phillips Petroleum Company, Edward L Bowman, November 5, 1996: US05571880 (65 worldwide citation)

Fluorenyl-containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition, polymers resulting from such polymerizations are disclosed.


8
Michael Schmid, Helmut G Alt, M Bruce Welch: High activity ethylene selective metallocenes. Phillips Petroleum Company, Edward L Bowman, July 30, 1996: US05541272 (65 worldwide citation)

Unbridged indenyl-containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition, polymers resulting from such polymerizations are disclosed.


9
Helmut G Alt, Syriac J Palackal, M Bruce Welch, David C Rohlfing, Jay Janzen: Method for producing polymer of ethylene. Phillips Petroleum Company, Edward L Bowman, January 20, 1998: US05710224 (60 worldwide citation)

A process for preparing a polymer of ethylene having a flow activation energy higher than that of a substantially linear ethylene polymer of the same molecular weight involving using bridged sandwich-bonded fluorenyl-containing metallocenes and the polymers resulting therefrom.


10
Roland Zenk, Helmut G Alt, M Bruce Welch: Organometallic fluorenyl compounds, preparation, and use. Phillips Petroleum Company, Edward L Bowman, September 19, 1995: US05451649 (59 worldwide citation)

Benzofluorenyl-containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition, polymers resulting from such polymerizations are disclosed.