Adv Polym Sci (2013) 258: 29–42
DOI: 10.1007/12_2013_215
# Springer-Verlag Berlin Heidelberg 2013
Published online: 16 May 2013
Development of ansa-Metallocene Catalysts
for Isotactic Olefin Polymerization
Hans H. Brintzinger and David Fischer
Abstract The development of ansa-metallocene catalysts is considered along
several lines of interest – ansa-metallocene complexes with different ligand
frameworks, insights gained with regard to relevant reaction intermediates and
contributions of ansa-metallocene catalysts to industrial polymer production –
with a view toward the present state of the art in these fields of catalysis research.
Keywords Activation Á ansa-Zirconocene catalysts Á Constrained-geometry
catalysts Á ethene/propene rubbers Á Isotactic polypropylene Á Linear low-density
polyethylene Á Molar-mass distribution Á Olefin polymerization Á Reaction
mechanisms Á Single-site catalysts Á Stereosectivity
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2 Structural Variants of ansa-Metallocene Catalysts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3 Mechanisms of Catalyst Activation and Polymerization Catalysis . . . . . . . . . . . . . . . . . . . . . . . . . 32
4 Industrial Use of ansa-Metallocene Catalysts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5 Concluding Remarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
H.H. Brintzinger (*)
University of Konstanz, Konstanz D-78457, Germany
e-mail: hans.brintzinger@uni-konstanz.de
D. Fischer
Albemarle Corporation, Baton Rouge, LA 70801, USA
e-mail: david.fischer@albemarle.com
DOI: 10.1007/12_2013_215
# Springer-Verlag Berlin Heidelberg 2013
Published online: 16 May 2013
Development of ansa-Metallocene Catalysts
for Isotactic Olefin Polymerization
Hans H. Brintzinger and David Fischer
Abstract The development of ansa-metallocene catalysts is considered along
several lines of interest – ansa-metallocene complexes with different ligand
frameworks, insights gained with regard to relevant reaction intermediates and
contributions of ansa-metallocene catalysts to industrial polymer production –
with a view toward the present state of the art in these fields of catalysis research.
Keywords Activation Á ansa-Zirconocene catalysts Á Constrained-geometry
catalysts Á ethene/propene rubbers Á Isotactic polypropylene Á Linear low-density
polyethylene Á Molar-mass distribution Á Olefin polymerization Á Reaction
mechanisms Á Single-site catalysts Á Stereosectivity
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
2 Structural Variants of ansa-Metallocene Catalysts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3 Mechanisms of Catalyst Activation and Polymerization Catalysis . . . . . . . . . . . . . . . . . . . . . . . . . 32
4 Industrial Use of ansa-Metallocene Catalysts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5 Concluding Remarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
H.H. Brintzinger (*)
University of Konstanz, Konstanz D-78457, Germany
e-mail: hans.brintzinger@uni-konstanz.de
D. Fischer
Albemarle Corporation, Baton Rouge, LA 70801, USA
e-mail: david.fischer@albemarle.com