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. 17, 1989
Filed:
Feb. 22, 1988
Shinya Miya, Ichiharashi, JP;
Masato Harada, Kisarazushi, JP;
Takaya Mise, Kawagoeshi, JP;
Hiroshi Yamazaki, Tokorozawashi, JP;
Chisso Corporation, both of, JP;
The Institute of Physical & Chemical Research, both of, JP;
Abstract
Bis(di-, tri- or tetra-substituted-cyclopentadienyl)zirconium dihalides represented by the following general formula [I] are provided, ##STR1## (wherein R.sup.1 denotes a substituent group on the cyclopentadienyl ring which is an alkyl radical of 1 to 5 carbon atoms; R.sub.2.sup.1 --C.sub.5 H.sub.3 stands for a di-substituted cyclopentadienyl radical; and X is a halogen atom). This compound, when combined with an aluminoxane repesented by the following general formula [VII], gives a high-activity catalyst for the synthesis of polyolefins, ##STR2## (wherein m is an integer of 4 to 20; and R.sup.2 denotes a hydrocarbyl radical).