Hydrogenated block copolymer
AssigneeKuraray Co., Ltd.
InventorsNaoto Takahashi, Yusuke Nojima
Life of this patent
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Abstract
A hydrogenated block copolymer containing polymer blocks (A1) and (A2) each mainly containing an aromatic vinyl compound-derived structural unit and polymer blocks (B) and (C) each mainly containing a conjugated diene compound-derived structural unit, at least one of the polymer blocks (B) and (C) being present between the polymer blocks (A1) and (A2), the hydrogenated block copolymer having a total content of the polymer blocks (A1) and (A2) of 5 to 30% by mass, a 3,4-bond and 1,2-bond content in the polymer block (B) of 1 to 40% by mole, a 3,4-bond and 1,2-bond content in the polymer block (C) of 50 to 100% by mole, and a mass ratio [(C)/{(B)±(C)} of the polymer block (C) to the sum of the polymer blocks (B) and (C) of 26/100 to 63/100.
Claims15
A hydrogenated block copolymer, comprising:
- polymer blocks (A1) and (A2) each comprising an aromatic vinyl compound-derived structural unit, and
- polymer blocks (B) and (C) each comprising a conjugated diene compound-derived structural unit,
- wherein at least one of the polymer blocks (B) and (C) is present between the polymer blocks (A1) and (A2),
- the hydrogenated block copolymer has
- a total content of the polymer blocks (A1) and (A2) of from 5 to 30% by mass,
- a 3,4-bond and 1,2-bond content in the polymer block (B) of from 1 to 40% by mole,
- a 3,4-bond and 1,2-bond content in the polymer block (C) of from 50 to 100% by mole, and
- a mass ratio [(C)/{(B)+(C)}] of the polymer block (C) to the sum of the polymer blocks (B) and (C) of from 26/100 to 63/100.
Dependencies are inferred from the claim text.