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:
Jul. 25, 1978
Filed:
Mar. 13, 1973
Akihiro Sato, Yokosuka, JP;
Shiro Konotsune, Yokohama, JP;
Atsuyuki Kachi, Yokohama, JP;
Hiroshi Shimizu, Yokohama, JP;
Chisso Corporation, Osaka, JP;
Abstract
Polymers of .alpha.-olefin such as polyethylene, polypropylene, copolymers of ethylene with propylene, butene-1 or styrene, are produced by the (co-) polymerization using a catalyst obtained by mill-mixing an oxide of a metal belonging to I, II, III, VII or VIII Group of the Periodic Table of Elements such as MgO or SiO.sub.2 or B.sub.2 O.sub.3, with a trivalent metal halide such as AlCl.sub.3, then reacting the resultant mixture with a transition metal compound such as TiCl.sub.4 in the presence of an aromatic compound such as xylene, and activating the resultant solid reaction product with an organoaluminum compound such as triethyl aluminum. In the preparation of the present catalyst, no dehydrochlorination occurs. The present catalyst has an excellent utilization efficiency of transition metal compound in the polymerization. Further, no polymer film forms on the wall surface of the polymerization vessel.