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:
Nov. 24, 2020
Filed:
Jun. 22, 2017
Dow Global Technologies Llc, Midland, MI (US);
Otto J. Berbee, Hulst, NL;
Nhi T. Y. Dang, Terneuzen, NL;
Cornelis J F Hosman, Terneuzen, NL;
Joaquin Flores, Aguilar de Campoo, ES;
Dow Global Technologies LLC, Midland, MI (US);
Abstract
A process to form an ethylene-based polymer, as described herein, in a tubular reactor system comprising at least three ethylene-based feeds, and at least four reaction zones, and where the weight ratio of 'the ethylene-based feed to the second zone (EBF2)' to 'the ethylene-based feed to the first zone (EBF1),' is from 0.50 to 1.10; and the weight ratio of “the ethylene-based feed to the third zone (EBF3)” to “the ethylene-based feed to the first zone (EBF1),” is from 0.40 to 2.50; in each zone, the polymerization takes place at a start temperature≥135° C.; and (a) for three or more ethylene based feeds, the peak temperatures in the first and the second zones, are each from 200° C. to 250° C.; and/or (b) for four or more ethylene based feeds, the peak temperatures in the first, the second and the third zones, are each from 200° C. to 250° C.; and the differential in peak temperatures of the first three zones (TP1, TP2, TP3) meets at least one relationship described herein.