US 12,473,383 B2
Transition metal catalysts for olefin polymerization
Todd D. Senecal, Midland, MI (US); David M. Pearson, Lake Jackson, TX (US); and Roxanne M. Jenkins, Missouri City, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/772,910
Filed by Dow Global Technologies LLC, Midland, TX (US)
PCT Filed Oct. 20, 2020, PCT No. PCT/US2020/056481
§ 371(c)(1), (2) Date Apr. 28, 2022,
PCT Pub. No. WO2021/086682, PCT Pub. Date May 6, 2021.
Claims priority of provisional application 62/928,098, filed on Oct. 30, 2019.
Prior Publication US 2023/0002515 A1, Jan. 5, 2023
Int. Cl. C08F 4/64 (2006.01); C07F 7/00 (2006.01); C08F 10/02 (2006.01); C08F 210/16 (2006.01)
CPC C08F 4/64186 (2013.01) [C07F 7/00 (2013.01); C08F 4/64044 (2013.01); C08F 210/16 (2013.01)] 19 Claims
 
1. A catalyst system comprising a metal-ligand complex according to formula (I):

OG Complex Work Unit Chemistry
where
M is a metal chosen from 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, (C1-C50)heterohydrocarbyl, (C6-C50)aryl, (C4-C50)heteroaryl, cyclopentadienyl, substituted cyclopentadienyl, (C4-C12)diene, halogen, —N(RN)2, or —NCORC;
n is 1, 2, or 3;
m is 1 or 2;
the metal-ligand complex has 6 or fewer metal-ligand bonds;
each T is nitrogen or CR4, wherein each R4 is independently chosen from (C1-C50)hydrocarbyl, (C1-C50)heterohydrocarbyl, (C6-C50)aryl, (C4-C50)heteroaryl, —Si(RC)3, —Ge(RC)3, —P(RP)2, —N(RN)2, —ORC, —SRC, —NO2, —CN, —CF3, halogen, or —H;
each R1 is independently selected from the group consisting of an aliphatic (C1-C50)hydrocarbyl, an aliphatic (C1-C50)heterohydrocarbyl, -halogen, or —H, and, when m is 2, two R1 are optionally covalently connected to each other;
each R2 is independently chosen from (C1-C50)hydrocarbyl, (C1-C50)heterohydrocarbyl, (C6-C50)aryl, (C4-C50)heteroaryl, —Si(RC)3, or —Ge(RC)3;
R1 and R2 are optionally covalently connected to form a ring structure;
each R3 and each R5 is independently chosen from (C1-C50)hydrocarbyl, (C1-C50)heterohydrocarbyl, (C6-C50)aryl, (C4-C50)heteroaryl, —Si(RC)3, —Ge(RC)3, —P(RP)2, —N(RN)2, —ORC, —SRC, —NO2, —CN, —CF3, RCS(O)—, RCS(O)2—, (RC)2C═N—, RCC(O)O—, RCOC(O)—, RCC(O)N(R)—, (RC)2NC(O)—, halogen, or —H;
each R6 is independently chosen from (C1-C50)hydrocarbyl, (C1-C50)heterohydrocarbyl, (C6-C50)aryl, (C4-C50)heteroaryl, —Si(RC)3, —Ge(RC)3, —P(RP)2, —N(RN)2, —ORC, —SRC, —NO2, —CN, —CF3, RCS(O)—, RCS(O)2—, (RC)2C═N—, RCC(O)O—, RCOC(O)—, RCC(O)N(R)—, (RC)2NC(O)—, or halogen;
R5 and R6 are optionally covalently connected to form a ring structure; and
each RC, RP, and RN in formula (I) is independently a (C1-C50)hydrocarbyl.