Sterically shielded diboron-containing metallocene olefin polymerization catalysts
Patent
·
OSTI ID:870055
A non-coordinating anion, preferably containing a sterically shielded diboron hydride, if combined with a cyclopenta-dienyl-substituted metallocene cation component, such as a zirconocene metallocene, is a useful olefin polymerization catalyst component. The anion preferably has the formula ##STR1## where R is branched lower alkyl, such as t-butyl.
- Research Organization:
- Northwestern University, Evanston, IL (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-86ER13511
- Assignee:
- Northwestern University (Evanston, IL)
- Patent Number(s):
- 5,447,895
- Application Number:
- 08/209,668
- OSTI ID:
- 870055
- Country of Publication:
- United States
- Language:
- English
Two-state propagation mechanism for propylene polymerization catalyzed by rac-[anti-ethylidene(1-.eta.5-tetramethylcyclopentadienyl)(1-.eta.5-indenyl)] dimethyltitanium
|
journal | October 1991 |
Isospecific polymerization of propylene catalyzed by rac-ethylenebis(indenyl)methylzirconium cation
|
journal | October 1991 |
Models for organometallic molecule-support complexes. Very large counterion modulation of cationic actinide alkyl reactivity
|
journal | April 1991 |
Cation-like homogeneous olefin polymerization catalysts based upon zirconocene alkyls and tris(pentafluorophenyl)borane
|
journal | April 1991 |
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Related Subjects
/502/526/
alkyl
anion
boron hydride
branched
catalyst
catalyst component
catalysts
cation
cation component
combined
component
containing
containing metal
coordinating anion
cyclopenta-dienyl-substituted
diboron
diboron-containing
formula
hydride
metallocene
metallocene olefin
non-coordinating
non-coordinating anion
olefin
olefin polymer
olefin polymerization
polymerization
polymerization catalyst
polymerization catalysts
preferably
preferably contain
preferably containing
shielded
shielded diboron
sterically
sterically shielded
str1
t-butyl
useful
zirconocene
alkyl
anion
boron hydride
branched
catalyst
catalyst component
catalysts
cation
cation component
combined
component
containing
containing metal
coordinating anion
cyclopenta-dienyl-substituted
diboron
diboron-containing
formula
hydride
metallocene
metallocene olefin
non-coordinating
non-coordinating anion
olefin
olefin polymer
olefin polymerization
polymerization
polymerization catalyst
polymerization catalysts
preferably
preferably contain
preferably containing
shielded
shielded diboron
sterically
sterically shielded
str1
t-butyl
useful
zirconocene