To provide: a rubber composition for tire capable of obtaining a vulcanized rubber excellent in balance between elastic modulus (Md50) and fracture elongation (Eb); a vulcanized rubber excellent in balance between elastic modulus (Md50) and fracture elongation(Eb); a bead filler; and tire.SOLUTION: There is provided a rubber composition for tire which comprises a rubber component having a natural rubber content of more than 50 mass%, a filler, a modified cellulose fiber having a cellulose I type crystalline structure in which a substituent of a specific structure is bonded via an ether bond, a phenolic thermosetting resin and a methylene donor, wherein the ratio (c/p) between the content c [pts.mass] of the modified cellulose fiber and the content p [pts.mass] of the phenolic thermosetting resin is 0.1 to 1.9.SELECTED DRAWING: None
【課題】弾性率(Md50)と破壊伸び(Eb)とのバランスに優れる加硫ゴムが得られるタイヤ用ゴム組成物、並びに、弾性率(Md50)と破壊伸び(Eb)とのバランスに優れた加硫ゴム、ビードフィラー及びタイヤを提供する。【解決手段】天然ゴムの含有量が50質量%を超えるゴム成分と、充填材と、特定構造の置換基がエーテル結合を介して結合しており、セルロースI型結晶構造を有する改質セルロース繊維と、フェノール系熱硬化性樹脂と、メチレン供与体とを含有し、改質セルロース繊維の含有量c〔質量部〕と、フェノール系熱硬化性樹脂の含有量p〔質量部〕との比(c/p)が0.1〜1.9であるタイヤ用ゴム組成物。【選択図】なし
RUBBER COMPOSITION FOR TIRE, VULCANIZED RUBBER, BEAD FILLER AND TIRE
タイヤ用ゴム組成物、加硫ゴム、ビードフィラー及びタイヤ
2020-06-04
Patent
Electronic Resource
Japanese
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08B POLYSACCHARIDES , Polysaccharide / 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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