Silica Fillers in Tire Compounds

Rubber compositions for vehicle tires that balance wet performance, rolling resistance, and wear resistance. The compositions contain a filler system with two different silicas. One is a surface-functionalized silica with specific surface areas of 250-310 m2/g and 230-285 m2/g. The other is an unfunctionalized silica with specific surface areas of 60-120 m2/g and 55-105 m2/g. This blend of silicas improves wet grip, rolling resistance, and wear resistance compared to similar filler systems using only one type of silica.

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Cross-linkable rubber composition for tire treads with improved rolling resistance without sacrificing wet grip. The composition contains specific ratios of mercaptosilane and disulfide/tetrasulfide silanes as coupling agents, along with natural/isoprene rubber, filler, resin, and alkoxysilane-amino SSBR. The mercaptosilane:silane ratio is 2:1 to 4:1. Cross-linking the composition in a tire assembly provides the rolling resistance benefit without compromising wet grip.

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Rubber mixture for tire treads with improved properties like rolling resistance, grip, and tear resistance. The mixture contains a specific type of styrene-butadiene rubber (SSBR) with a glass transition temperature between -35°C and -85°C. This rubber is combined with silica filler and a specific amount of a silane. The silane has a formula with a thioacetate or thiopropyl group (X) bonded to a silicon atom (Si) and a propyl group (R) with a siloxane (S) bond between them. The silane amount is 1-30 parts per hundred parts of rubber (phr). The mixture can be used in tire treads for vehicles to provide better balance of properties like rolling resistance, grip, and tear resistance compared to conventional tire tread compositions.

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Rubber composition for tires that provides improved rolling resistance, wet grip, and handling compared to conventional tire rubbers. The composition uses a blend of natural rubber, polybutadiene rubber, and two different solution-polymerized styrene-butadiene rubbers with specific glass transition temperatures. It also contains two silicas with different surface areas, along with coupling agents. The composition enables optimizing winter performance without sacrificing rolling resistance, by balancing silica-filler interactions and silanization. The cross-linkable composition can be used in tire treads, and the cross-linked tire has improved properties like rolling resistance, wet grip, and handling.

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Tire rubber composition for improved wet grip and fuel efficiency. It contains a specific combination of rubber components, hydrogenated resin, silica, and carbon black. The rubber components are isoprene-based and modified styrene-butadiene rubber with high styrene content (30% or more). The hydrogenated resin has a high softening point (100°C or above) and moderate molecular weight (1200-1600 g/mol). The silica loading is 50-100% of the total filler content. This composition balance provides optimal wet grip and rolling resistance.

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Rubber composition for tire treads that provides a balance of low rolling resistance, good wet traction, and wear resistance. The composition contains specific diene rubber, silica, a silane coupling agent, a fatty acid metal salt, and an alkylsilane. The diene rubber has a high percentage of a specific conjugated diene rubber formed by reacting a siloxane with a diene-based polymer. This improves silica dispersion for rolling resistance. The alkylsilane plasticizer suppresses silica aggregation. The fatty acid salt further aids silica dispersion. The blend ratio of these components provides a balance of rolling resistance, wet traction, and wear resistance.

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Rubber compound for tire treads that improves wet grip, rolling resistance, and profile stiffness. The compound contains a functionalized butadiene rubber, a liquid-modified diene polymer, a polar filler like silica, and a diene rubber. The functionalized butadiene rubber interacts with the polar filler. The modified diene polymer has a backbone modification that also allows interaction with the polar filler. This filler-rubber interaction improves wet grip and rolling resistance while maintaining stiffness.

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Tire rubber composition that provides improved wet grip and fuel efficiency. The composition contains an isoprene skeleton rubber, a modified styrene-butadiene rubber with 15% or less bound styrene, hydrogenated resin with a softening point over 100°C and Mw of 1200-1600, silica with 50-100% filler content, and carbon black. This balance of components enables optimized wet traction and reduced rolling resistance.

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Rubber composition for tire that balances wet grip performance and fuel efficiency. The composition contains a specific combination of diene-based rubbers, a resin, and filler. The diene-based rubber components have different glass transition temperatures. One component has an isoprene skeleton and a low glass transition temp (-50°C or lower). The other component has a butadiene skeleton and is incompatible with the first component. The resin has a molecular weight of 200-1600 g/mol and content of 1-45 parts by mass with respect to 100 parts rubber. The filler content is 20-120 parts by mass with respect to 100 parts rubber. The ratio of 0°C tan δ to 50°C tan δ is 2.7 or more.

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Rubber composition for tires that balances wet grip, fuel efficiency, and wear resistance. The composition contains a styrene-butadiene rubber (A) with a modified terminal group, and an unmodified styrene-butadiene rubber (B) with a higher glass transition temperature. The modified rubber (A) is produced by modifying an active polymer with a compound containing a silicon atom bonded to an amine group. This improves dispersion of fillers like silica for better wet grip and wear resistance. The unmodified rubber (B) provides the balance of fuel efficiency.

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Rubber composition for tires that balances wet grip, fuel efficiency, and handling. The composition contains natural rubber, styrene-butadiene rubber with high glass transition temperature, resin, and fillers. The styrene-butadiene rubber has been partially hydrogenated to match the isoprene rubber's solubility parameter. The resin content is in the range of 15-50 parts by weight relative to the natural rubber. This composition improves wet grip, fuel efficiency, and handling compared to typical tire rubber compositions.

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Rubber composition for tires with improved steering stability, wet performance, and low rolling resistance over a wide temperature range. The composition contains specific amounts of modified styrene-butadiene rubber, silica, thermoplastic resin, and a silane coupling agent. The modified styrene-butadiene rubber has a vinyl content of 9-45 mol% and a glass transition temperature of -45°C or lower, with terminal groups containing siloxane or amine functionalities. The composition also has silica, thermoplastic resin, and a silane coupling agent in specific ranges.

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Low heat-generating tread rubber composition for tires that reduces tire temperature during rolling to improve tire durability and extend tire life. The composition contains specific additives like 2,5-diethoxyterephthaloyl hydrazide that modify the rubber and filler to improve dispersion and reduce sliding. The additives react with rubber chain ends, filler surfaces, and silica to enhance bonding, reduce hysteresis loss, and mitigate the Payne effect. This reduces heat generation compared to using just white carbon black instead of regular carbon black. The composition can be made using a mixing method involving specific steps to incorporate the additives.

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Rubber composition for tire treads that provides improved wet grip and rolling resistance compared to conventional tire rubber compositions. The composition contains a diene elastomer, a high surface area silica (Tl > 100 m2/g) as the main reinforcing filler, a microsilica (T2 < 50 m2/g) as a secondary filler, a silane coupling agent, and a crosslinking system. The microsilica in addition to the high surface area silica enhances wet grip and reduces rolling resistance compared to using just the high surface area silica.

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Low-rolling-resistance high-wear resistance tire tread rubber composition that can improve the dispersion of white carbon black in tread rubber and the processability of rubber materials by using white carbon black and silica fume as fillers and selecting a silane coupling agent capable of mixing at high temperature. The composition includes carbon black and white carbon black as fillers, and selecting a silane coupling agent capable of mixing at high temperature.

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Pneumatic tire with improved durability and wear resistance by using a specific silane coupling agent in the tread rubber. The coupling agent is represented by a formula with a specific alkyl group, alkoxy group, and substitution on the silicon atom. This coupling agent provides enhanced durability and wear resistance when used in tire tread rubber containing silica as a reinforcing filler. The formula is: (R1)3Si(OR3)x, where R1 is an alkyl group with 5 to 20 carbon atoms, n is 1 to 3, and x is 1 to 5.

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Rubber composition that is excellent in wet grip performance and low rolling resistance. The composition includes an isoprene skeleton rubber and a styrene-butadiene rubber, the filler contains at least silica, the silane coupling agent has a thiol group, the content of the silane coupling agent is 1 part by mass or more and 10.5 parts by mass or less with respect to 100 parts by mass of the rubber component, and the content of the fatty acid metal salt is 0.1 part by mass with respect to 100 parts by mass of the rubber component.

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Tire tread composition with improved properties like reduced rolling resistance, stiffness, and tear without compromising other performance metrics like traction, wear, and tensile strength. The composition uses a specific combination of silane coupling agents along with a diene rubber and silica filler. The silane agents include bis(dialkylalkoxysilyl-alkyl) polysulfide coupling agents. The agents improve silica dispersion and compatibility in the rubber matrix. This leads to better processing, reduced agglomeration, and enhanced rubber properties like hysteresis and stiffness without impacting tear and strength.

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Rubber composition for tire treads that improves wet grip and processing while maintaining rolling resistance. The composition contains specific fillers like silica, white carbon black, and silane coupling agent along with other components like butadiene and styrene-butadiene rubbers. The white carbon black R300 improves dispersibility and processing when using high filler loadings like over 60 parts by weight of silica. This allows better wet grip without sacrificing rolling resistance.

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Rubber composition for heavy duty tires with improved wear resistance, fuel efficiency, processability, and tensile strength compared to conventional rubber compositions. The composition contains 60-85% isoprene rubber, 15-40% modified styrene-butadiene rubber with a glass transition temperature below -50°C, and 40 parts or more of silica per 100 parts diene rubber. The isoprene rubber provides wear resistance, the modified styrene-butadiene rubber improves low rolling resistance, and the high silica content enhances wear resistance.

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