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. 14, 2023
Filed:
Jun. 13, 2019
Dow Global Technologies Llc, Midland, MI (US);
Timothy W. Gambrel, Lake Jackson, TX (US);
Curvel Hypolite, Rosharon, TX (US);
Daniel S. Rynearson, Lake Jackson, TX (US);
Michael J. Zogg, Jr., Houston, TX (US);
Kyle E. Hart, Manvel, TX (US);
Michael D. Turner, Lake Jackson, TX (US);
Jorge Rubalcaba, Pearland, TX (US);
Pradeep Jain, Lake Jackson, TX (US);
Mehmet Demirors, Pearland, TX (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
A method of producing bimodal ethylene-based polymer includes reacting ethylene monomer and C-Cα-olefin comonomer in the presence of a first catalyst in an agitated reactor to produce a first polymer fraction, and outputting effluent from the agitated reactor. A second catalyst is added to the effluent downstream of the agitated reactor and upstream from a non-agitated reactor, the second catalyst facilitates production of a second polymer fraction having a density and melt index (I) different from the first polymer fraction. The second catalyst and effluent are mixed in at least one mixer. The second catalyst, second polymer fraction, and the first polymer fraction are passed to the non-agitated reactor; and additional ethylene monomer, additional C-Cα-olefin comonomer, and solvent are passed to the non-agitated reactor to produce more second polymer fraction and thereby the bimodal ethylene-based polymer.