RUBBER COMPOSITION FOR TIRE

• Main Author: ASHIURA MAKOTO
• Format: Patent
• Language: English; Japanese
• Published: 23.05.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS; TYRE CHANGING OR REPAIRING; TYRE INFLATION; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL

To provide a rubber composition for a tire which has excellent low rolling resistance and wet performance, high tensile stress and rubber hardness, and reduced rubber viscosity.SOLUTION: The rubber composition for a tire is obtained by blending: 100 pts.mass of a rubber component containing 10-100 mass% of a conjugated diene copolymer; 80-200 pts.mass of silica; and 2-20 mass% of a silane coupling agent based on the amount of the silica. The conjugated diene copolymer comprises a copolymer obtained by polymerizing a conjugated diene monomer, or the conjugated diene monomer and an aromatic vinyl compound by using an organic active metal. A terminal of the copolymer is modified with a phosphate ester compound or a phosphite ester compound.SELECTED DRAWING: None 【課題】 低転がり抵抗性、ウェット性能に優れ、引張り応力、ゴム硬度が高く、且つゴム粘度を低減するようにしたタイヤ用ゴム組成物を提供する。【解決手段】 共役ジエン系共重合体を１０〜１００質量％含むゴム成分１００質量部に、シリカを８０〜２００質量部、シランカップリング剤をシリカ量の２〜２０質量％配合してなり、前記共役ジエン系共重合体が、共役ジエン単量体、または共役ジエン単量体と芳香族ビニル化合物とを有機活性金属を用いて重合されてなる共重合体からなり、該共重合体の末端が、リン酸エステル化合物もしくは亜リン酸エステル化合物で変性されてなることを特徴とする。【選択図】なし