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:
Oct. 01, 1996
Filed:
May. 22, 1995
Mitsubishi Chemical Corporation, Tokyo-to, JP;
Abstract
A catalyst useful for the polymerization of olefins, comprising the following components (A) and (B): Component (A):A transition metallic compound having the following formula [I]: ##STR1## wherein M:a transition metal selected from Ti, Zr and Hf; R.sup.1 :a monovalent C.sub.1-6 hydrocarbyl group, or a monovalent C.sub.1-6 hydrocarbyl group containing Si; R.sup.2 :a divalent C.sub.4-20 hydrocarbyl group, or a divalent C.sub.4-20 hydrocarbyl group containing Si; R.sup.3 :a divalent C.sub.1-30 hydrocarbyl group, or a divalent C.sub.1-30 hydrocarbyl group containing Si or Ge; and X and Y:H, halogen, a monovalent C.sub.1-20 hydrocarbyl group, or a monovalent C.sub.1-20 hydrocarbyl group containing N, O or Si. Component (B):Alumoxane having the following formula [II] or [III]: ##STR2## wherein m:4 to 30; and R.sup.4 :a monovalent hydrocarbyl group. A highly stereoregular polyolefin having a high molecular weight can be obtained by the above catalyst.