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, 2005
Filed:
Jun. 04, 2002
Wilhelm Zoller, Oberhausen, DE;
Wilhelm Zoller, Oberhausen, DE;
Basell Polyolefine GmbH, , DE;
Abstract
The invention relates to a process for preparing ethylene homopolymers and ethylene copolymers in a tube reactor at pressures above 1000 bar and temperatures in the range from 120 to 400° C. by free-radical addition polymerization, in which first small amounts of free-radical chain initiator are supplied to a streaming flow medium comprising ethylene, molar mass regulator, and, if desired, polyethylene, after which the polymerization takes place. The invention takes place at a pressure in the range from 2000 to 3500 bar and comprises reaction mixture within the tube reactor passing through a temperature profile in the range from 100 to 350° C.