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US 2021/0230338 A1Published application
Block copolymer and method of producing same, hydrogenated block copolymer, polymer composition, and shaped product
AssigneeZeon Corporation
InventorYusuke YASU
Life of this patent
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Abstract
Provided is a block copolymer that can serve as a precursor of a hydrogenated block copolymer. The block copolymer includes polymer blocks [A] and [B]. The polymer block [A] includes a polycyclic aromatic vinyl monomer unit including at least two monocycles selected from the group consisting of aromatic hydrocarbon monocycles and aromatic heteromonocycles. A mass ratio of proportional content of 1,2-vinyl bonds and proportional content of 1,4-vinyl bonds in the block copolymer is not less than 5/95 and not more than 90/10.
Claims8
A block copolymer comprising:
- a polymer block [A] having an aromatic vinyl compound-derived structural unit as a main component;
- and a polymer block [B] having an aliphatic conjugated diene compound-derived structural unit as a main component, wherein
- the polymer block [A] includes a polycyclic aromatic vinyl monomer unit including at least two monocycles selected from the group consisting of aromatic hydrocarbon monocycles and aromatic heteromonocycles, and
- a mass ratio of proportional content of 1,2-vinyl bonds and proportional content of 1,4-vinyl bonds in the block copolymer, in terms of 1,2-vinyl bonds/1,4-vinyl bonds, is not less than 5/95 and not more than 90/10.
1 more element
Dependencies are inferred from the claim text.