Back to results
US 2026/0265283 A1Published application
Asymmetrical hafnium metallocenes
AssigneeDow Global Technologies LLC
InventorsRhett A. Baillie, David M. Pearson, Mahsa McDougal, Angela I. Padilla-Acevedo, Philip P. Fontaine, Kurt F. Hirsekorn, Roger L. Kuhlman
Life of this patent
Estimating the term…
Abstract
Embodiments of the present disclosure are directed towards asymmetrical hafnium metallocenes, compositions including those asymmetrical hafnium metallocenes, and methods utilizing compositions including the asymmetrical hafnium metallocenes.
Claims19
An asymmetrical hafnium metallocene represented by structure (I):
- wherein R1 is a (C1-C8)alkyl;
- and each X is independently a leaving group.
(canceled)
A method of making a polyolefin polymer, the method comprising:
- polymerizing at least one olefin monomer with a spray dried asymmetrical hafnium metallocene catalyst composition to make the polyolefin polymer;
- wherein at least one olefin monomer comprises ethylene and, optionally, a comonomer selected from the group consisting of propene and a (C4-C20)alpha-olefin, wherein the polyolefin polymer has a molecular weight comonomer distribution index (MWCDI) from 0.10 to 10.00 and a MWCDI vs density relationship such that:
- MWCDI>−133*Density+126.75.
Dependencies are inferred from the claim text.