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Burkhardt Terry J, Wiser Dawn C, Li Robert T, Stehling Udo M, Haygood William T Jr, Rix Francis C, Mehta Aspy K: Propylene impact copolymers. Exxonmobil Chemical Patents, Burkhardt Terry J, Wiser Dawn C, Li Robert T, Stehling Udo M, Haygood William T Jr, Rix Francis C, Mehta Aspy K, FAULKNER Kevin M, August 16, 2001: WO/2001/058970 (4 worldwide citation)

This invention relates to propylene impact copolymer compositions. In particular, these unique and improved compositions can be produced using conventional, commercial-scale processes.


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Burkhardt Terry J, Stehling Udo M, Hart James R, Haygood William T, Li Robert T, Vizzini James C, Kuchta Matthew C: (indenyl) Metallocene compounds. Exxonmobil Chemical Patents, SCHMIDT Paige, January 10, 2002: WO/2002/002576 (4 worldwide citation)

This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The metallocene compositions may be represented by the formula wherein M?1¿ is selected from the group consisting of titanium, zir ...


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Burkhardt Terry J, Hart James R, Haygood William T, Li Robert T: Metallocenes and catalyst compositions derived therefrom. Exxonmobil Chem Patents, March 29, 2006: EP1640377-A1 (3 worldwide citation)

Metallocenes and catalyst systems for olefin polymerization derived therefrom. The metallocenes may be represented by the formula: wherein M 1 preferably is zirconium or hafnium; and R 5 is different from hydrogen.


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Burkhardt Terry J, Hart James R, Haygood William T, Li Robert T: Metallocenes and catalyst compositions derived therefrom. Exxonmobil Chemical Patents, Burkhardt Terry J, Hart James R, Haygood William T, Li Robert T, sSCHMIDT Paige, June 19, 2003: WO/2003/050131 (1 worldwide citation)

Metallocenes and catalyst systems for olefin polymerization derived therefrom. The metallocenes may be represented by the formula: (I), wherein M?1¿ preferably is zirconium or hafnium; and R?5¿ is different from hydrogen.


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Burkhardt Terry J, Stehling Udo M, Hart James R, Haygood William T, Li Robert T, Vizzini James C, Kuchta Matthew C: Propylene polymer. Exxonmobil Chem Patents, March 8, 2006: EP1632506-A1

This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. The metallocene compositions may be represented by the formula: wherein M 1 is selected from the group consisting of titanium, zir ...


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Kuchta Matthew C, Stehling Udo M, Li Robert T, Haygood William T, Burkhardt Terry J: Bridged bisindenyl metallocene compositions. Exxonmobil Chem Patents, April 21, 2004: EP1411058-A1

This invention relates to metallocene compositions and their use in the preparation of catalyst systems for olefin polymerization, particularly propylene polymerization. In one embodiment, the metallocenes of the present invention may be represented by the formula: wherein M is a metal of Group 4, 5 ...


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