PROBLEM TO BE SOLVED: To provide a rubber composition for a tire for improving low heat generation property and mechanical characteristics.SOLUTION: There is provided a rubber composition for a tire obtained by blending 30 to 80 pts.wt. of carbon black having a nitrogen adsorption specific surface area of 20 to less than 90 m/g and more than 0.8 pt.wt to less than 3 pts.wt. of a sulfur component in terms of pure sulfur based on 100 pts.wt. of a rubber component which is a rubber component composed of 40 wt.% or more of a natural rubber and/or an isoprene rubber, 30 to 100 wt.% of a masticated rubber masterbatch in which 0.3 to 5.0 wt.% of a compound having an amino group represented by the formula (i) is coexisted with 100 wt.% of a diene-based rubber optionally including a butadiene rubber and a total of 70 to 0 wt.% of a butadiene rubber, a natural rubber and an isoprene rubber and contains a total 30 to 70 wt.% of a natural rubber and an isoprene rubber and a total of 70 to 30 wt.% of a butadiene rubber.SELECTED DRAWING: None
【課題】低発熱性及び機械的特性を改良するタイヤ用ゴム組成物の提供。【解決手段】天然ゴム及び/又はイソプレンゴムを、40重量%以上及び任意にブタジエンゴムを含むジエン系ゴム100重量%に式(i)で表されるアミノ基を有する化合物0.3〜5.0重量%を共存させた素練りゴムマスターバッチ30〜100重量%、並びにブタジエンゴム、天然ゴム及びイソプレンゴムの合計70〜0重量%からなるゴム成分であると共に、天然ゴム及びイソプレンゴムの合計を30〜70重量%、並びにブタジエンゴムの合計70〜30重量%を含むゴム成分100重量部に対し、窒素吸着比表面積が20〜90m2/g未満であるカーボンブラックを30〜80重量部、硫黄成分を純硫黄換算で0.8超〜3重量部未満を配合するタイヤ用ゴム組成物。【選択図】なし
RUBBER COMPOSITION FOR TIRE
タイヤ用ゴム組成物
2016-11-24
Patent
Electronic Resource
Japanese
IPC: | C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen / B60C VEHICLE TYRES , Fahrzeugreifen / C08J Verarbeitung , WORKING-UP / 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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