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US 2025/0136742 A1Published application
Multi-Block Copolymer and Method for Preparing the Same
AssigneeLG Chem, Ltd.
InventorsHyun Mo Lee, Seul Ki Im, Dae Woong Lee, Ji Hyun Park, Yun Kon Kim, Eun Ji Shin, Seok Pil Sa
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Abstract
A multi-block copolymer and a method for preparing the same which are capable of providing a resin composition with excellent compatibility and high impact strength due to a chain structure close to symmetry are described herein.
Claims20
A multi-block copolymer comprising a polystyrene-based block including a repeating unit derived from an aromatic vinyl-based monomer and a polyolefin-based block including a repeating unit derived from an ethylene and a repeating unit derived from an alpha-olefin, wherein:
- the multi-block copolymer satisfies the following conditions when a storage modulus G′ according to temperatures and a loss modulus G″ according to temperatures as measured by a dynamic mechanical analysis method are plotted as a y-axis and an x-axis, respectively:
- a) a slope at 130° C. is 2.00 to 4.00, and
- b) a slope at 190° C. is 3.00 to 5.00.
Dependencies are inferred from the claim text.