RUBBER COMPOSITION FOR TIRE, AND PNEUMATIC TIRE USING THE SAME

• Main Author: IWAKUNI KEISUKE
• Format: Patent
• Language: English; Japanese
• Published: 11.07.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; VEHICLE TYRES; VEHICLES IN GENERAL

To provide a rubber composition for tire capable of improving on-ice brake performance and operation stability on ice and wet road surface, and a pneumatic tire using the same.SOLUTION: There is provided a rubber composition for tire containing a rubber component and having a ratio between storage elastic modulus at a temperature -40°C of a vulcanizate E' (-40°C) and storage elastic modulus at the temperature -5°C E' (-5°C), measured under a condition of frequency of 10 Hz, static strain of 10% and dynamic strain of ±0.25% in a range of 2.5≤E'(-40°C)/E'(-5°C)≤5.0, and storage elastic modulus E' (-40°C) of 30 MPa or less.SELECTED DRAWING: None 【課題】氷上制動性能と、氷上及び湿潤路面での操縦安定性を向上させることができる、タイヤ用ゴム組成物、及びそれを用いた空気入りタイヤを提供する。【解決手段】ゴム成分を含有し、周波数１０Ｈｚ、静歪み１０％、動歪み±０．２５％の条件で測定した、加硫物の温度−４０℃での貯蔵弾性率Ｅ'（−４０℃）と温度−５℃での貯蔵弾性率Ｅ'（−５℃）の比が、２．５≦Ｅ'（−４０℃）／Ｅ'（−５℃）≦５．０の範囲内であり、貯蔵弾性率Ｅ'（−４０℃）が、３０ＭＰａ以下である、タイヤ用ゴム組成物とする。【選択図】なし