To provide a rubber crosslinked product excellent in wet grip performance, low heat generating property and abrasion resistance.SOLUTION: There is provided a rubber crosslinked product which is obtained by crosslinking a rubber composition comprising a conjugated-diene-based rubber (A) having an aromatic vinyl monomer unit content of 20 wt.% or more, 5 wt.% or less of a rubber (B) and an inorganic filler (C), wherein when the loss tangent of the cross-linked material is measured under specific conditions, a loss tangent value Ka (m) of a non-interfacial component forming a part other than an interface with the inorganic filler (C) of a crosslinked rubber phase (a) derived from the conjugated-diene-based rubber (A), a loss tangent value Ka (i) of an interfacial component forming an interface with the inorganic filler (C) of the crosslinked rubber phase (a), a loss tangent value Kb (m) of a non-interfacial component forming a part other than an interface with the inorganic filler (C) of a crosslinked rubber phase (b) derived from the rubber (B) and a loss tangent value Kb (i) of an interfacial component forming an interface with the inorganic filler (C) of the crosslinked rubber phase (b) have a specific relationship.SELECTED DRAWING: None
【課題】ウエットグリップ性、低発熱性および耐摩耗性に優れたゴム架橋物を提供する。【解決手段】芳香族ビニル単量体単位の含有割合が20重量%以上である共役ジエン系ゴム(A)と、5重量%以下であるゴム(B)と、無機充填剤(C)とを含有するゴム組成物を架橋してなるゴム架橋物であって、特定の条件で該架橋物の損失正接を測定した際の、共役ジエン系ゴム(A)由来の架橋ゴム相(a)のうち、無機充填剤(C)との界面以外の部分を形成する非界面成分の損失正接値Ka(m)と、架橋ゴム相(a)のうち、無機充填剤(C)との界面を形成する界面成分の損失正接値Ka(i)と、ゴム(B)由来の架橋ゴム相(b)のうち、無機充填剤(C)との界面以外の部分を形成する非界面成分の損失正接値Kb(m)と、架橋ゴム相(b)のうち、無機充填剤(C)との界面を形成する界面成分の損失正接値Kb(i)とが特定の関係にあるゴム架橋物を提供する。【選択図】なし
RUBBER CROSSLINKED PRODUCT
ゴム架橋物
2023-09-05
Patent
Elektronische Ressource
Japanisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08C TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS , Behandlung oder chemische Modifizierung von Kautschuken / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS |
Europäisches Patentamt | 2023
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