To improve an on-ice performance and a wet performance.SOLUTION: A rubber composition for a studless tire tread according to an embodiment contains 20-50 pts.mass of carbon black, 5-60 pts.mass of silica, and 0.1-20 pts.mass of a cyclic alkoxide represented by a following general formula (1) based on 100 pts.mass of a rubber component containing 30-60 pts.mass of natural rubber and 40-70 pts.mass of polybutadiene rubber. In the formula (1), M represents a divalent metal atom; and R1 and R2 each represent a hydrogen atom, an alkyl group, a hydroxy group-substituted alkyl group, an amino group-substituted alkyl group or a thiol group-substituted alkyl group.SELECTED DRAWING: None
【課題】氷上性能とウェット性能を向上する。【解決手段】実施形態に係るスタッドレスタイヤトレッド用ゴム組成物は、天然ゴム30〜60質量部とポリブタジエンゴム40〜70質量部を含むゴム成分100質量部に対して、カーボンブラック20〜50質量部と、シリカ5〜60質量部と、下記一般式(1)で表される環状アルコキシド0.1〜20質量部と、を含む。式(1)中、Mは二価金属原子を表し、R1及びR2は水素原子、アルキル基、ヒドロキシ基置換アルキル基、アミノ基置換アルキル基またはチオール基置換アルキル基を表す。【化1】【選択図】なし
RUBBER COMPOSITION FOR STUDLESS TIRE TREAD, AND STUDLESS TIRE
スタッドレスタイヤトレッド用ゴム組成物及びスタッドレスタイヤ
2021-07-29
Patent
Elektronische Ressource
Japanisch
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / 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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