Polymerization catalyst, process for preparing, and use for ethylene homopolymerization

US4395359A · kind A · utility

Assignee

• UNION CARBIDE CORPORATION · US

Inventors

• Burkhard E. Wagner · Highland Park, US
• Frederick J. Karol · Montgomery, US
• George L. Goeke · Kendall Park, US
• Robert J. Jorgensen · Fort Bragg, US
• Nils Friis · Gulf Stream, US

Key dates

• Filing date: Mar 31, 1981
• Grant date: Jul 26, 1983
• Expiry date: Mar 31, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/901
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A catalyst formed from selected organo aluminum compounds and a precursor composition of the formula EQU Mg.sub.m Ti.sub.1 (OR).sub.n X.sub.p [ED].sub.q wherein PA0 ED is a selected electron donor compound PA0 m is .gtoreq.0.5 to .ltoreq.56 PA0 n is 0 or 1 PA0 p is .gtoreq.6 to .ltoreq.116 PA0 q is .gtoreq.2 to .ltoreq.85 PA0 R is a C.sub.1 to C.sub.14, aliphatic or aromatic hydrocarbon radical, or COR' wherein R' is a C.sub.1 to C.sub.14 aliphatic or aromatic hydrocarbon radical, and PA0 X is selected from the group consisting of Cl, Br, I, or mixtures thereof, which catalyst is in particulate from and diluted with an inert carrier material; a process for preparing such catalyst; a process for using said catalyst to readily prepare ethylene homopolymer having a density of about .gtoreq.0.958 to .ltoreq.0.972 and a melt flow ratio of .gtoreq.22 to .ltoreq.32 in a low pressure gas phase process at a productivity of .gtoreq.50,000 pounds of polymer per pound of Ti. Novel polymers and molded articles are prepared.