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:
Jan. 12, 1982
Filed:
Mar. 06, 1980
Applicant:
Inventor:
Arthur W Langer, Watchung, NJ (US);
Assignee:
Exxon Research & Engineering Co., Florham Park, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
2524 / ; 526125 ; 526141 ; 526142 ; 526139 ; 526140 ; 2524 / ; 2524 / ; 2524 / ; 2524 / ;
Abstract
A new improved catalyst system for alpha-olefin type polymerizations, includes at least one metal alkyl compound having the formula R.sub.3 '' M in combination with a Group IVB-VIII transition metal compound on a support and at least one hindered Lewis base and at least one unhindered Lewis base wherein R is selected from the group consisting of C.sub.1 to C.sub.20 secondary or tertiary alkyl, cycloalkyl, alkenyl or aralkyl groups; M is selected from the group consisting of aluminum, gallium, or indium. The improved catalyst system provides polymers having increased isotactic stereoregularity as well as lower catalyst residue.