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. 24, 1983
Filed:
Apr. 21, 1981
James F Jaggard, Ludwigshafen, DE;
Peter Klaerner, Battenberg, DE;
Guenther Schweier, Friedelsheim, DE;
BASF Aktiengesellschaft, , DE;
Abstract
A process for the preparation of homopolymers and copolymers of .alpha.-monoolefins by means of a Ziegler-Natta catalyst system comprising (1) a titanium-III component, which is prepared by subjecting (1.1) a titanium trichloride/aluminum trichloride compound (a) and (1.2) an ester (b) to a certain type of milling treatment in which (A) a vibratory ball mill providing a relatively high milling acceleration is used, (B) the mill is first charged with the titanium-containing compound (a) and, if appropriate, is run for a certain period, thereafter (C) the ester (b) is added at a certain rate while milling the charge, thereupon (D) the charge is kept at +15.degree. C. or above for a certain period, while continuing the milling, hereupon (E), if appropriate, the product obtained from (D) is milled further for a certain period at +5.degree. C. or below, then (F), if appropriate, but advantageously so, the product obtained from (D) or (E) is kept at +20.degree. C. or above for a certain period, without milling, and thereafter (G), if appropriate, the product obtained from (F) is milled further for a certain period at +5.degree. C. or below, (2) an aluminum-alkyl component containing a chlorine bonded to the aluminum, and (3), if appropriate, a phenolic compound of a certain category, in which process a titanium-III component (1) is employed, in the preparation of which additionally .sup.- (H) a suspension is prepared from (H.sub.1) the product obtained according to (D), (E), (F) or (G), (H.sub.2) a liquid hydrocarbon (c) and (H.sub.3) an oxygen-containing compound (d), consisting of (d.sub.1) an ether of a certain category and/or (d.sub.2) an ester of a certain category, thereafter (I) the suspension obtained according to (H) is kept at an elevated temperature for a certain period, with vigorous agitation, and is then cooled, hereupon (J), if appropriate, the solid is isolated from the suspension obtained according to (I), and, if desired, is washed with a liquid hydrocarbon and dried, the novel titanium-III component (1) being the solid, in suspended form, obtained according to (I) or the solid, in isolated form, obtained according to (J). Using this Ziegler-Natta catalyst system, polymers with relatively high stereo-regularity and advantageous morphological properties can be obtained in relatively high yield.