US 12,077,619 B2
Process of polymerizing tetra-functional long-chain branched polyolefin resins
Robert D. J. Froese, Midland, MI (US); Daniel J. Arriola, Midland, MI (US); and Bryan D. Stubbert, Midland, MI (US)
Assigned to Dow Global Technoloiges LLC, Midland, MI (US)
Appl. No. 17/280,301
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Sep. 27, 2019, PCT No. PCT/US2019/053524
§ 371(c)(1), (2) Date Mar. 26, 2021,
PCT Pub. No. WO2020/069362, PCT Pub. Date Apr. 2, 2020.
Claims priority of provisional application 62/738,621, filed on Sep. 28, 2018.
Prior Publication US 2022/0033548 A1, Feb. 3, 2022
Int. Cl. C08F 210/18 (2006.01); C08F 210/16 (2006.01)
CPC C08F 210/18 (2013.01) 15 Claims
OG exemplary drawing
 
1. A process of synthesizing long-chain branched copolymers, the process comprising:
contacting together one or more C2-C14 alkene monomers, at least one α,ω-diene or α,ω-polyene, optionally a solvent, and a multi-chain catalyst, wherein the multi-chain catalyst comprises multiple polymerization sites;
producing at least two polymer chains of the C2-C14 alkene monomers, each polymer chain polymerizing at one of the polymerization sites; and
synthesizing the long-chain branched copolymers by connecting the two polymer chains with the α,ω-diene or α,ω-polyene, the connecting of the two polymer chains being performed in a concerted manner during the polymerization.