METHOD FOR PRODUCING RUBBER COMPOSITION FOR TIRE

• Main Author: TSUCHIYA SHUJI
• Format: Patent
• Language: English; Japanese
• Published: 22.11.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; GENERAL PROCESSES OF COMPOUNDING; 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; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL; WORKING-UP

PROBLEM TO BE SOLVED: To provide a method for producing a rubber composition for tire which improves abrasion resistance or cut resistance to a conventional level or higher while reducing heat build-up property.SOLUTION: A method for producing a rubber composition for tire which contains 15-55 pts.mass of silica and 30-60 pts.mass of a filler formed of carbon black with respect to 100 pts.mass of a rubber component containing 30-80 mass% of natural rubber and/or isoprene rubber and 20-70 mass% of butadiene rubber, and includes 6-15 mass% of a silane coupling agent with respect to the amount of the silica, includes: mixing the whole amount of the butadiene rubber, 10-30 pts.mass of silica with respect to 100 pts.mass of the butadiene rubber, and 6-15 mass% of the silane coupling agent with respect to the amount of the silica to prepare BR master batch; mixing the BR masterbatch and a residue of the component; and setting Mooney viscosity of the BR masterbatch to be higher than Mooney viscosity of the natural rubber and/or isoprene rubber.SELECTED DRAWING: None 【課題】発熱性を小さくしながら、耐摩耗性または耐カット性を従来レベル以上に向上するようにしたタイヤ用ゴム組成物の製造方法を提供する。【解決手段】天然ゴムおよび／またはイソプレンゴムを３０〜８０質量％、ブタジエンゴムを２０〜７０質量％含有するゴム成分１００質量部に対し、シリカ１５〜５５質量部およびカーボンブラックからなるフィラーを３０〜６０質量部配合し、シランカップリング剤を前記シリカの量に対し６〜１５質量％含み、前記ブタジエンゴムの全量と、該ブタジエンゴム１００質量部に対し１０〜３０質量部のシリカと、該シリカ量に対し６〜１５質量％のシランカップリング剤を混合しＢＲマスターバッチを調製し、このＢＲマスターバッチと、前記成分の残余を混合し、前記ＢＲマスターバッチのムーニー粘度を、前記天然ゴムおよび／またはイソプレンゴムのムーニー粘度よりも高くすることを特徴とする。【選択図】なし