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US 12,441,830 B2Granted
Method for preparing polyolefin-polystyrene-based multiblock copolymer
AssigneeLG Chem, Ltd.
InventorsYun Kon Kim, Seul Ki Im, Hyun Mo Lee, Ji Hyun Park, Dong Min Kim, Mi Kyung Kim, Ki Soo Lee, Eun Ji Shin, Seok Pil Sa, Seung Jung Yu
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Abstract
The present invention relates to a method for preparing a polyolefin-polystyrene-based multiblock copolymer having a uniform structure and showing excellent physical properties through continuous type coordination polymerization and batch type anionic polymerization.
Claims13
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.
Dependencies are inferred from the claim text.