PROBLEM TO BE SOLVED: To provide a rubber composition which contains a rubber component excellent in cold flow resistance and is improved in low loss properties and wear resistance as compared with conventional ones.SOLUTION: The rubber composition contains: a modified conjugated diene-based polymer having a hydroxyl group at its terminal; and at least one of natural rubber and polyisoprene rubber. The modified conjugated diene-based polymer preferably has a cis-1,4 bond content of 95% or more and a molecular weight distribution (Mw/Mn) of 2.5 or less, and the content of the modified conjugated diene-based polymer in a rubber component is preferably 20 mass% or more.SELECTED DRAWING: None
【課題】耐コールドフロー性に優れたゴム成分を含み、従来よりも低ロス性と耐摩耗性を向上させたゴム組成物を提供する。【解決手段】末端にヒドロキシル基を有する変性共役ジエン系重合体と、天然ゴム及びポリイソプレンゴムの少なくとも一方と、を含有することを特徴とする、ゴム組成物である。前記変性共役ジエン系重合体は、シス−1,4結合量が95%以上であることが好ましく、分子量分布(Mw/Mn)が2.5以下であることが好ましく、また、ゴム成分中の前記変性共役ジエン系重合体の含有量は、20質量%以上であることが好ましい。【選択図】なし
RUBBER COMPOSITION, CROSSLINKED RUBBER COMPOSITION, AND RUBBER PRODUCT
ゴム組成物、架橋ゴム組成物及びゴム製品
2017-09-28
Patent
Electronic Resource
Japanese
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 |
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