	US 12,441,830 B2
	Method for preparing polyolefin-polystyrene-based multiblock copolymer
Yun Kon Kim, Daejeon (KR); Seul Ki Im, Daejeon (KR); Hyun Mo Lee, Daejeon (KR); Ji Hyun Park, Daejeon (KR); Dong Min Kim, Daejeon (KR); Mi Kyung Kim, Daejeon (KR); Ki Soo Lee, Daejeon (KR); Eun Ji Shin, Daejeon (KR); Seok Pil Sa, Daejeon (KR); and Seung Jung Yu, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 18/022,818
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Aug. 25, 2021, PCT No. PCT/KR2021/011377 § 371(c)(1), (2) Date Feb. 23, 2023, PCT Pub. No. WO2022/045770, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 10-2020-0109159 (KR), filed on Aug. 28, 2020; and application No. 10-2021-0111575 (KR), filed on Aug. 24, 2021.
Prior Publication US 2023/0303753 A1, Sep. 28, 2023
Int. Cl. C08F 297/08 (2006.01); C08F 210/16 (2006.01); C08F 295/00 (2006.01)

CPC C08F 297/086 (2013.01) [C08F 210/16 (2013.01); C08F 295/00 (2013.01); C08F 2410/01 (2013.01)]

13 Claims

1. A method for preparing a polyolefin-polystyrene-based multiblock copolymer, the method comprising:

(S1) preparing a polyolefin by performing coordination polymerization of ethylene and an alpha-olefin-based monomer, while continuously injecting a hafnium compound, an organozinc compound, an organic solvent, an ethylene gas and an alpha-olefin-based monomer to a continuous type reactor, and transporting the polyolefin to a batch type reactor; and

(S2) performing anionic polymerization of the polyolefin and a styrene-based monomer in the presence of an alkyllithium compound, in the batch type reactor.