US 12,286,502 B2
Olefin polymerization catalysts bearing a thiazole or imidazole
Jordan C. Reddel, Midland, MI (US); Todd D. Senecal, Midland, MI (US); Brad C. Bailey, Midland, MI (US); Andrew M. Camelio, Auburn, MI (US); Sukrit Mukhopadhyay, Midland, MI (US); and John B. Etienne, Mount Pleasant, MI (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/622,373
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Jun. 23, 2020, PCT No. PCT/US2020/039076
§ 371(c)(1), (2) Date Dec. 23, 2021,
PCT Pub. No. WO2020/263790, PCT Pub. Date Dec. 30, 2020.
Claims priority of provisional application 62/867,039, filed on Jun. 26, 2019.
Prior Publication US 2022/0259336 A1, Aug. 18, 2022
Int. Cl. C08F 4/64 (2006.01); C08F 4/659 (2006.01); C08F 10/02 (2006.01); C08F 210/14 (2006.01); C08F 210/16 (2006.01)
CPC C08F 4/64044 (2013.01) [C08F 4/65908 (2013.01); C08F 210/14 (2013.01); C08F 210/16 (2013.01); C08F 10/02 (2013.01)] 18 Claims
 
1. A catalyst system comprising a metal-ligand complex having a structure according to formula (I):

OG Complex Work Unit Chemistry
where:
M is a metal chosen from titanium, zirconium, or hafnium, the metal having a formal oxidation state of +2, +3, or +4;
each X is a monodentate or bidentate ligand independently chosen from unsaturated (C2-C50) hydrocarbon, unsaturated (C2-C50) heterohydrocarbon, (C1-C50) hydrocarbyl, (C6-C50) aryl, (C6-C50) heteroaryl, cyclopentadienyl, substituted cyclopentadienyl, (C4-C12) diene, halogen, —N(RN) 2, or —NCORC;
m is 1 or 2;
n is 2 or 3, provided m+n=4;
each Z is NRN or S, wherein RN is (C1-C40) hydrocarbyl or (C1-C40) heterohydrocarbyl;
each R1 is (C1-C40) hydrocarbyl, (C1-C40) heterohydrocarbyl, or trimethylsilyl methyl;
each R2 and R3 is independently selected from the group consisting of (C1-C50) hydrocarbyl, (C1-C50) heterohydrocarbyl, (C6-C50) aryl, (C4-C50) heteroaryl, —Si(RC)3, halogen, and —H, wherein RC is independently selected from the group consisting of (C1-C20) hydrocarbyl, (C1-C20) heterohydrocarbyl, and —H; and
optionally, R2 and R3 are covalently linked to form a ring.