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:
Jun. 01, 1976
Filed:
Sep. 23, 1974
Joseph M Kelley, Westfield, NJ (US);
John J Miskel, Jr, Mendham, NJ (US);
Dart Industries Inc., Los Angeles, CA (US);
Abstract
Propylene, for example, is polymerized with crystalline TiCl.sub.3 --AlCl.sub.3 and diethylaluminum monochloride catalyst at a rate of at least 300 lbs. polymer/lb. catalyst/hr. based on TiCl.sub.3 with partial H.sub.2 pressure of about 150 to about 1000 psi and sufficient total pressure to maintain propylene in liquid form. The resulting propylene homopolymer, while still containing active catalyst residues, is then reacted further with at least one additional alpha-olefin, preferably ethylene or ethylene-containing alpha-olefin mixtures in suitable amounts. The resulting waxy block copolymer has a melt flow of 40 to 400 as determined by ASTM-D-1238-62T at 230.degree.C.