Transition metal compound and catalyst containing the same for polymerization of olefins
AssigneeJapan Polyolefins Co., Ltd.
InventorsTakashi Seki, Hiroyuki Shimizu, Akira Sano
Life of this patent
Estimating the term…
Abstract
Disclosed is a novel transition metal composition of a metallacycle structure represented by the formula ##STR1## wherein M.sup.1 is an element of Group IVB in the Periodic Table, M.sup.2 is an element of Group IIIA in the Periodic Table, R.sup.1 and R.sup.2 each are for instance a cyclopentadienyl group, R.sup.3 and R.sup.4 each are for instance a hydrocarbon group, R5 and R6 each are a hydrogen atom and R7 and R8 indicate an indan ring formed by bonding to each other.
Claims5
A novel transition metal compound represented by the formula ##STR12## wherein M.sup.1 is an element of Group IVB in the Periodic Table, M.sup.2 is an element of Group IIIA in the Periodic Table, R.sup.1 and R.sup.2 each are a cyclopentadienyl group, a substituted cyclopentadienyl group, an indenyl group or a substituted indenyl group and may be bonded to each other through a C.sub.1 -C.sub.18 hydrocarbon group and/or silylene group, R.sup.3 and R.sup.4 each are a hydrogen atom or a C.sub.1 -C.sub.18 hydrocarbon group, R.sup.5 and R.sup.6 each are a hydrogen atom or a C.sub.1 -C.sub.18 hydrocarbon group and R.sup.7 and R.sup.8 each are a hydrogen atom or a C.sub.1 -C.sub.18 hydrocarbon group and may be bonded to each other to form one or more cyclic hydrocarbon group.
Dependencies are inferred from the claim text.