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:
Jan. 02, 2024
Filed:
May. 19, 2021
Exxonmobil Chemical Patents Inc., Baytown, TX (US);
Crisita Carmen H. Atienza, Houston, TX (US);
Rhutesh K. Shah, Katy, TX (US);
Ron Walker, Pearland, TX (US);
John R. Hagadorn, Houston, TX (US);
Sudhin Datta, Houston, TX (US);
ExxonMobil Chemical Patents Inc., Baytown, TX (US);
Abstract
A process to produce a branched ethylene-α-olefin diene elastomer comprising combining a catalyst precursor and an activator with a feed comprising ethylene, C3 to C12 α-olefins, and a dual-polymerizable diene to obtain a branched ethylene-α-olefin diene elastomer; where the catalyst precursor is selected from pyridyldiamide and quinolinyldiamido transition metal complexes. The branched ethylene-α-olefin diene elastomer may comprise within a range from 40 to 80 wt % of ethylene-derived units by weight of the branched ethylene-α-olefin diene elastomer, and 0.1 to 2 wt % of singly-polymerizable diene derived units, 0.1 to 2 wt % of singly-polymerizable diene derived units, and the remainder comprising C3 to C12 α-olefin derived units, wherein the branched ethylene-α-olefin diene elastomer has a weight average molecular weight (M) within a range from 100 kg/mole to 300 kg/mole, an average branching index (g′) of 0.9 or more, and a branching index at very high M(g′) of less than 0.9.