PROBLEM TO BE SOLVED: To provide a silica-containing rubber composition that uses a cyclic olefin ring-opened polymer such as cyclopentene ring-opened polymer which is an alternative material for BR (Butadiene Rubber) and SBR (Styrene-Butadiene Rubber) and that has improved processability and improved dispersion property of silica and that enables fuel economy to be improved when used in a tire application.SOLUTION: In one embodiment, the rubber composition for a tire is provided that contains a rubber component, silica and a silane coupling agent. The rubber component contains a cyclic olefin ring-opened polymer having in a polymer chain terminal, at least one kind of functional group selected from a group consisting of a hydroxyl group, an alkoxysilyl group, an aldehyde group, a carboxyl group, an amino group, an imino group, an epoxy group, an amide group, a thiol group and an ether group. The silane coupling agent contains a monosulfide group, the amount of the silane coupling agent is 0.3 to 20 pts.wt. based on 100 pts.wt. of the silica. In another embodiment, the rubber composition for a tire is provided that is the same as the above rubber composition except that the rubber composition further contains a crosslinking agent.SELECTED DRAWING: None
【課題】加工性の向上および、シリカの分散性を向上し、タイヤ用途に用いた際の燃費の向上が図れるBR、SBRの代替材料であるシクロペンテン開環重合体などの環状オレフィン開環重合体を用いたシリカ含有ゴム組成物の提供。【解決手段】ゴム成分、シリカ及びシランカップリング剤を含み、前記ゴム成分が、重合体鎖末端に、ヒドロキシル基、アルコキシシリル基、アルデヒド基、カルボキシル基、アミノ基、イミノ基、エポキシ基、アミド基、チオール基およびエーテル基からなる群から選ばれる少なくとも1種の官能基を有する環状オレフィン開環重合体を含み、前記シランカップリング剤がモノスルフィド基を含んでおり、前記シランカップリング剤の量が前記シリカ100重量部に対して0.3〜20重量部であるタイヤ用ゴム組成物。更に架橋剤を含有するタイヤ用ゴム組成物。【選択図】なし
RUBBER COMPOSITION FOR TIRE, RUBBER CROSSLINKED ARTICLE AND TIRE
タイヤ用ゴム組成物、ゴム架橋物およびタイヤ
2016-05-16
Patent
Electronic Resource
Japanese
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08G MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind / 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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