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公开(公告)号：EP4257368A1
公开(公告)日：2023-10-11
申请号：EP21903255.4
申请日：2021-12-01
发明人： KIKUCHI, Toshimitsu , SENGA, Hirofumi , SAKAGAMI, Yuto , SANO, Takuya , FUKUMOTO, Takato , HAYAKAWA, Toshiyuki
摘要： A polymer composition includes a conjugated diene-based polymer (A) and a filler having a Mohs hardness of 5 or more (B), wherein the conjugated diene-based polymer (A) comprises a polymer (Al) satisfying expression (i) when a composition ratio (molar ratio) of a structural unit represented by formula (1), a structural unit represented by formula (2), a structural unit represented by formula (3) and a structural unit represented by formula (4) in the polymer is p, q, r and s, respectively. 0.75 ≤ p + 0.5 × r / p + q + 0.5 × r + s ≤ 0.95
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公开(公告)号：EP4253081A1
公开(公告)日：2023-10-04
申请号：EP21898150.4
申请日：2021-11-29
发明人： SENGA, Hirofumi , KIKUCHI, Toshimitsu , SAKAGAMI, Yuto , SANO, Takuya , FUKUMOTO, Takato , HAYAKAWA, Toshiyuki
摘要： A polymer composition includes a conjugated diene-based polymer (A) and a liquid polymer (B), wherein: the conjugated diene-based polymer (A) includes a polymer (A1) satisfying expression (i) when a composition ratio (molar ratio) of a structural unit represented by formula (1), a structural unit represented by formula (2), a structural unit represented by formula (3) and a structural unit represented by formula (4) in the polymer is p, q, r and s, respectively; a glass transition temperature of the polymer (A1) is -40°C or less; and the liquid polymer (B) is polybutadiene, polyisoprene, polyisobutylene, polybutene, or the like. Expression (i):0.75 ≤ (p + (0.5 × r))/ (p + q + (0.5 × r) + s) ≤ 0.97.
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3.发明公开
公开(公告)号：EP4310110A1
公开(公告)日：2024-01-24
申请号：EP22771389.8
申请日：2022-03-14
发明人： NAKAHAMA, Tatsumoto , KIKUCHI, Toshimitsu , SENGA, Hirofumi , SANO, Takuya , FUKUMOTO, Takato , SAKAGAMI, Yuto , HAYAKAWA, Toshiyuki
摘要： A conjugated diene-based polymer has a value α defined by mathematical expression (i) of 0.65 to 0.97. p, q, r, and s represent compositional ratios (mole ratios) of the structural units represented by formulas (1) to (4) respectively in the polymer. The conjugated diene-based polymer includes, in an amount of 25 to 75 mass%, polymer (A1) which has a multi-branched structure having 4 or more molecular chains. The polymer (A1) has a functional group containing at least one element selected from the group consisting of nitrogen, oxygen, and sulfur at one or both of a terminal and a branching point of the polymer (A1). α = p + 0.5 × r / p + q + 0.5 × r + s
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