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. 09, 1991
Filed:
Dec. 21, 1989
John T Hsieh, Warren, NJ (US);
Ann L Pruden, Bellemead, NJ (US);
Mobil Oil Corporation, Fairfax, VA (US);
Abstract
A modified supported catalyst composition for polymerizing olefins, particularly alpha-olefins, for example, ethylene or ethylene and 1-hexane, is prepared by combining a chromium compound-containing catalyst with a modifier which is an oxide of an element of Group IIIA of the Periodic Table of the Elements. The modifier contains a small quantity of water. The resulting modified catalyst composition produces polymer resins having higher values of High Load Melt Index -HLMI (I.sub.21) than catalyst compositions without the modifier. There is also disclosed a process for polymerizing olefins, at relatively lower temperatures than was heretofore possible, to obtain resins of relatively high HLMI, using the above-identified modified catalyst composition. The resulting polymers can be used for the fabrication of blow-molded products, e.g., household and industrial containers.