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:
May. 17, 1988
Filed:
Nov. 14, 1986
Guenther Schweier, Friedelsheim, DE;
James F Jaggard, Gruenstadt, DE;
Rainer A Werner, Bad Durkheim, DE;
Wolfgang Gruber, Frankenthal, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Polymers of propylene are prepared by means of a Ziegler-Natta catalyst system comprising (1) a titanium component which contains titanium, magnesium, chlorine and a benzenecarboxylic acid derivative, (2) an aluminum component and (3) a silane component, wherein the (1) used is obtained by (1.1) first reacting with one another (1.1.1) in a liquid hydrocarbon, (1.1.2) a finely divided magnesium halide, (1.1.3) an alkanol, (1.1.4) a phthalic acid ester and (1.1.5) titanium tetrachloride under certain conditions, (1.2) then extracting the solid intermediate obtained from (1.1) with a liquid alkylbenzene until the remaining solid substance has become significantly richer in magnesium, and (1.3) finally washing the solid substance remaining in (1.2) with an alkane in a certain manner.