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:
Sep. 15, 2020
Filed:
Jun. 22, 2017
Dow Global Technologies Llc, Midland, MI (US);
Otto J. Berbee, Terneuzen, NL;
Nhi T. Y. Dang, Terneuzen, NL;
Cornelis J F Hosman, Terneuzen, NL;
Joaquin Flores, Tarragona, ES;
Dow Global Technologies LLC, Midland, MI (US);
Abstract
A process to form an ethylene-based polymer comprising polymerizing a mixture comprising ethylene, in the presence of a free-radical initiator, and in a tubular reactor system comprising at least two ethylene-based feed streams, and a reactor configuration that comprises at least three reaction zones; and the inlet pressure of the first zone is <3200 Bar; and the ethylene conversion >28%, and an m value from 20 mole % to 70 mole %, where m=mol % of ethylene-based feed stream to the first zone, based on total moles of ethylene-based feed streams fed to the reactor configuration; and the ratio (Q) of a 'MWDB of a broad polymer polymerized, to a 'MWDN of a narrow polymer polymerized, is as follows: {(T)*(−2.3×log(m)+7)}≤Q≤{(T)*(−13.0×log(m)+29.8)}; at the same melt index; and “T' is the “chain transfer activity ratio' as described herein.