Low Rolling Resistance Materials for Tires

Rubber composition for tire treads that balances wet grip, rolling resistance, and wear. The composition contains specific amounts of styrene-butadiene rubber, polybutadiene, natural rubber, silica filler, hydrocarbon resin, oil, and a cure package. The styrene-butadiene rubber has a low glass transition temperature (-10 to -20°C) to improve grip. The polybutadiene has high cis content (-101°C Tg) for wet grip. The silica filler has high surface area (100 to 400 m2/g) for low rolling resistance. The hydrocarbon resin (Tg 70 to 110°C) and oil provide processability. The composition can omit carbon black filler for improved wet grip.

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Rubber composition for tire treads that improves the balance between wet performance and rolling resistance compared to conventional tire treads. The composition contains a diene rubber, thermoplastic elastomer, resin, and silica filler. The diene rubber is a blend of styrene-butadiene rubber (SBR) and butadiene rubber (BR). The thermoplastic elastomer has a butylene unit content of 25 mass % or less. The resin is added to the composition. This composition configuration improves wet traction while maintaining rolling resistance compared to using high styrene content rubber or hydrogenated thermoplastic elastomers alone.

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Rubber composition for tire treads that balances wet, rolling resistance, and snow performance. The composition contains a diene rubber, thermoplastic elastomer, resin, and silica. The diene rubber has a specific range of styrene-butadiene ratios. The thermoplastic elastomer has a low butylene content. The resin is a styrene-based resin. This composition provides improved balance of wet traction, rolling resistance, and snow performance compared to conventional tire treads.

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Elastomeric composition for tires with improved crosslinking properties and reduced hysteresis. The composition contains a polytetrazole crosslinking agent with a lower activation temperature compared to conventional sulfur-based vulcanizing agents. This allows controlled early crosslinking during mixing and processing without excessive crosslinking. The composition also includes diene elastomer, fillers, oil, wax, antioxidant, accelerator, and retarder. It aims to provide tires with improved low rolling resistance, reduced energy loss, and better processing properties.

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Pneumatic tire with improved low rolling resistance, durability, and steering stability compared to conventional tires. The tire has a tread with an inner undertread layer and outer cap tread layer. The undertread rubber composition contains specific carbon black, silica, and silane coupling agent ratios. The undertread layer thickness relative to the cap tread layer is optimized. This configuration reduces rolling resistance while maintaining durability and steering stability.

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A tire design that improves durability and fuel efficiency by optimizing the belt structure. The tire has a tread with circumferential main grooves and land portions. The belt layer includes an inner cross belt with belts at 45 degrees, an outer cross belt with belts at 45 degrees opposite sign, and a circumferential reinforcing layer between them with belts at 5 degrees. The reinforcing layer width is less than the outer cross belt width which is less than the inner cross belt width. This configuration provides durability by protecting the outer cross belt from groove bottom damage, while reducing rolling resistance by eliminating a small angle belt.

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Rubber compositions for tires that provide good rolling resistance, tensile strength, and stiffness. The compositions contain a partially saturated elastomer with >15% double bonds and pre-silanized silica. The double bond content in the elastomer balances rolling resistance and tensile strength. The pre-silanized silica improves tensile strength without reducing stiffness. This allows better rolling resistance without compromising properties like stiffness.

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A diene rubber composition for tire applications with improved low rolling resistance, wear resistance, and wet grip compared to conventional diene rubbers. The composition involves modifying two different diene rubbers with specific silicon compounds, then hydrolyzing and drying them. One diene rubber is modified with a silicon compound represented by formula (1) and/or (2). The other diene rubber is modified with the same silicon compounds. This modified rubber composition, when blended with silica and carbon black, provides better low rolling resistance, wear resistance, and wet grip compared to conventional diene rubbers. The composition also has good workability and processability. The silicon compound modifications create specific branching structures on the rubber chains that enhance silica interaction and performance.

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ABSTRACT Significant advancements in developing highperformance, sustainable tyre tread compounds have been achieved through the strategic integration of modified silica into carbon black (CB)/thermally exfoliated graphite hybrid filler systems. While benefits fillers such as CB, graphite, and are recognized, limited understanding their interaction mechanisms with polymer chains has hindered widespread adoption. This study investigates mechanical, thermal, dynamic mechanical properties an ecofriendly, green compound, focusing on both binary (CB/silica) ternary (CB, graphite/modified silica) The key aspect this research is utilization prepared by latex imprinting technique along epoxidized natural rubber (ENR) a compatibilizer to enhance between NR matrix. partial replacement CB thermally novel lateximprinted enhanced surface area provides excellent properties, low rolling resistance, improved wet grip, reduced heat buildup. porosity silica, coupled system, play crucial role reducing hysteresis, resulting resistance (0.0376), grip (0.0796), very buildup (13C). attribu... Read More

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A non-pneumatic tire design with a high stiffness shear band to reduce rolling resistance while maintaining load carrying capacity. The shear band uses oblong shaped cords with wider lateral width than height. These cords are arranged in parallel layers to increase the volume of reinforcement materials in the shear band. This allows using stiffer materials with lower hysteresis compared to rubber, which reduces rolling resistance compared to traditional shear bands with rubber sandwiched between belts.

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Heavy duty tire with reduced rolling resistance and improved wet performance as the tire wears. The tire has a specific tread design with narrow grooves and sipes that suppresses rolling resistance increase due to wear. The narrow grooves have a radially inner enlarged width portion with wider groove width than the body. The sipes are shallower than the narrow grooves. This allows the enlarged width portion to remain as the body narrows and sipes disappear. It prevents wet performance degradation in the later stages of wear when the enlarged width portion is exposed. The tread has high styrene butadiene rubber and silica content to enable this design.

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Rubber composition for tire treads that improves rolling resistance without sacrificing wet traction. The composition contains a balanced blend of natural rubber and polybutadiene, a filler ratio of at least 1:1 carbon black to silica, a coupling agent, a traction resin, a cure accelerator, and a curing system. This formulation allows reducing rolling resistance while maintaining good wet traction compared to traditional tire treads.

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ABSTRACT As the global transportation industry evolves, there is a rapid surge in market demand for engineering tires. Nevertheless, working environment becoming increasingly complex and challenging, tires are now subject to more stringent performance requirements, including reduced rolling resistance, decreased heat generation, enhanced wear cut resistance. In this work, type of Eucommia ulmoides gum (EUG)/natural rubber (NR)/styrenebutadiene (SBR) nanocomposite was effectively prepared with silica as nanofiller. Subsequently, epoxidized natural (ENR) introduced into EUG/NR/SBR nanocomposites address issue agglomeration within enhance comprehensive nanocomposites. The relationship between ENR content further investigated. results demonstrate that reduces surface activity via hydrogen bond effect grafting reaction, thus enhancing dispersion. Moreover, at an 9 phr, dynamic temperature rise 25.2C volume abrasion 0.135 cm 3 1.61 km 1 , representing 12.2% reduction 21.1% decrease compared without ENR. This work develops innovative approach dispersion fillers EUGbased multifu... Read More

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Rubber composition for heavy-load tires with improved wear resistance and low rolling resistance. The composition contains a solution-polymerized aromatic vinyl-conjugated diene copolymer with specific vinyl bond content and functional group, and carbon black. The copolymer has 0.5-25% aromatic vinyl units and 0-50% vinyl bond content in the conjugated diene units. This copolymer interacts better with carbon black, providing lower heat buildup, better wear resistance, and tear resistance.

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Rubber composition for tires with improved wear resistance, wet performance, rolling resistance, and temperature dependency of rolling resistance. The composition contains a diene rubber with at least 55% of a specific styrene-butadiene rubber having a Tg of -50°C or lower. This rubber enhances silica dispersion, wear, and low rolling resistance. Additionally, the composition has a white filler of 30-100 parts, thermoplastic resin, and a silane coupling agent blended with the filler at 3-20 mass%. This balance improves dispersibility, reduces rolling resistance temperature dependency, and prevents gelling.

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Rubber compositions with improved wet traction and low rolling resistance for tire treads. The compositions contain a polysulfide crosslinking agent with polar groups that chemically attach to the rubber chains during mixing. This increases the hydrophilicity of the rubber and enhances wet traction without negatively impacting rolling resistance. The crosslinking agent has a polar group like carboxylate or ether that can be grafted onto the rubber during compounding.

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A precipitated silica with low aluminum content for improved properties in polymer compositions like rubber. The silica contains aluminum in an amount below 0.50 wt %. The low aluminum content improves compatibility with polymers like rubber, leading to better dispersion, reinforcement, and elastomer properties. The silica can be used in rubber compositions for tires and other articles. The low aluminum content is achieved by a process involving controlled acid addition during silica production.

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Rubber compositions with improved properties for tire applications by using silica fillers dispersed using nonionic surfactants. The compositions contain silica particles, rubber, and a nonionic surfactant with an HLB value of 8-14. The surfactant coats the silica particles during mixing, reducing viscosity compared to using water alone. This allows easier processing of the rubber without high temperatures. The surfactant also improves the rubber properties like lower hysteresis for better rolling resistance. The surfactant remains on the silica surface in the cured rubber.

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Passenger car tires (PCTs) usually consist of a silica/silane-filled Butadiene Rubber (BR) or Solution Styrene (SSBR) tread compound. This system is widely used due to improvements observed in rolling resistance (RR) as well wet grip compared carbon black-filled compounds. However, the covalent bond that couples silica via silane with rubber increases challenge recycling these products. Furthermore, this strong unable reform once it broken, leading deterioration tire properties. work aims improve negative aspects silica-filled compounds by developing novel coupling based on non-covalent interactions, which exhibit reversible feature. The formation new was accomplished reacting and phenolic resin order obtain simultaneous interactions hydrogen bonding. reaction performed using two different silanes (amino epoxy silane) an alkyl phenolformaldehyde resin. implementation resulted improved crosslink density, better mechanical performance, superior fatigue behavior, similar indicator.

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A polymer composition for tires that balances fuel efficiency and rigidity. The composition contains a modified conjugated diene-based polymer with nitrogen-containing functional groups, and a functional-group-containing polymer. The modified polymer improves fuel efficiency, while the functional-group-containing polymer maintains rigidity. The ratio of modified polymer to functional polymer is 99:1 to 70:30 by mass. This composition allows tires to have both low rolling resistance and good steering stability.

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