The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 1996
Filed:
Feb. 18, 1994
Toshihiko Sugano, Yokkaichi, JP;
Tomohiko Takahama, Yokkaichi, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A catalyst component for use in the polymerization of .alpha.-olefins, comprising a compound represented by the following general formula I!: ##STR1## wherein R.sup.1 s represent a hydrogen atom, a C.sub.1-6 hydrocarbon group or a C.sub.1-12 hydrocarbon group containing silicon; each of R.sup.2 and R.sup.3 which forms the condensed ring represents a divalent C.sub.3-20 saturated or unsaturated hydrocarbon group, provided that at least one of R.sup.2 and R.sup.3 forms a ring condensed with the cyclopentadiene which is a seven- to twelve-membered ring having an unsaturated bond inherent in R.sup.2 or R.sup.3 ; Q represents a C.sub.1-20 divalent hydrocarbon group, a silylene group, a silylene group with a C.sub.1-20 hydrocarbon group, a germylene group, or a germylene group with a C.sub.1-20 hydrocarbon group; X and Y represent H, a halogen, a C.sub.1-20 hydrocarbon group, or a C.sub.1-20 hydrocarbon group containing oxygen, nitrogen or phosphorus; and M represents a Group IVB to VIB transition metal of the Periodic Table. Production of .alpha.-olefin polymers having a high melting point and a high molecular weight in a high yield and a process for producing .alpha.-olefin polymers is made possible upon the use of the catalyst.