US 12,391,779 B2
Ethylene propylene diene monomer (EPDM) and nonconjugated diene copolymers and methods for making same
Solomon H. K. Tang, Geismar, LA (US); Willie Charles Burton, Geismar, LA (US); Alrica L. J. Payne, Geismar, LA (US); and Michael Durousseau, Geismar, LA (US)
Assigned to Lion Copolymers Holdings, LLC, Geismar, LA (US)
Filed by Lion Copolymer Geismar, LLC, Geismar, LA (US)
Filed on Jun. 18, 2024, as Appl. No. 18/746,829.
Application 18/746,829 is a continuation in part of application No. 17/975,261, filed on Oct. 27, 2022, granted, now 12,049,554.
Claims priority of provisional application 63/273,299, filed on Oct. 29, 2021.
Prior Publication US 2024/0336715 A1, Oct. 10, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C08F 210/16 (2006.01); C08F 210/18 (2006.01); C08L 23/16 (2006.01); C08L 23/26 (2025.01)
CPC C08F 210/18 (2013.01) [C08L 23/16 (2013.01); C08F 2500/17 (2013.01); C08F 2810/20 (2013.01); C08L 23/26 (2013.01); C08L 2205/025 (2013.01)] 19 Claims
OG exemplary drawing
 
1. The method of making a copolymer comprising:
adding a solvent to a reactor;
adding propylene and a catalyst mixture to the solvent in the reactor to make a first reaction mixture, wherein the catalyst mixture comprises: one or more catalysts, one or more cocatalysts, and one or more catalyst reactivators;
contacting ethylene with the first reaction mixture to make a second reaction mixture; and
contacting a diene compound with the second reaction mixture to make a copolymer, wherein the diene compound is selected from the group consisting of vinyl norbornene, dicyclopentadiene, and ethylidene norbornene, wherein the copolymer has a weight average molecular weight from about 2,500 g/mol to about 1,000,000 g/mol, and wherein the copolymer has a viscosity from about 1,000 cP to about 2,500,000 cP at 100° C.