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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Annular shear band for non-pneumatic tires with reduced rolling resistance. The shear band has an annular rubber shear layer with discrete annular reinforcing elements interlaced in a zigzag pattern. The reinforcing elements are arranged in rows with reinforcing elements from adjacent rows forming rhombus shapes. This configuration provides load support and prevents crack propagation while allowing high strain deformation. The shear layer is made of a rubber composition with natural rubber and a low styrene content copolymer. The reinforcing elements are made of silica with a coupling agent. The specific reinforcing element arrangement and rubber composition provide low rolling resistance in the shear band.

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Modifying conjugated diene-based polymers like styrene-butadiene rubber (SBR) to improve properties like wet grip, low rolling resistance, and processability. The modification involves reacting the polymer with a specific modifier containing a functional group derived from a compound represented by formula 1: R1-R6 are alkoxy groups, A is an arylene or heteroarylene ring, and L1-L4 are alkylene chains. The modifier has affinity with fillers like silica and improves compounding properties.

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Polydiene rubbers with improved properties for tire applications, made by polymerizing diene monomers with functionalized comonomers containing alkoxy silyl groups. The functionalized comonomers have repeating units derived from the functionalizing comonomer. The functionalized rubber polymers have better interactions with fillers and improved tire properties compared to non-functionalized diene polymers.

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Rubber composition for tire treads that provides improved wet grip and rolling resistance compared to conventional rubber compositions. The composition contains specific ratios of styrene-butadiene rubber (SBR), ethylene-propylene-diene rubber (EPDM), silica, and zinc oxide. The composition also has a specific styrene content in the SBR, vinyl content in the SBR, and glass transition temperature (Tg) of the SBR. Cross-linking the composition improves wet grip and maintains rolling resistance compared to cross-linking conventional rubber compositions.

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The prediction of tire rolling resistance is importance in both academic and engineering. Classic computational methods are complexity low efficiency. This paper proposes a method based on cumulative changes strain energy density to calculate resistance. Obtain the stress stains states various components by Finite Element Analysis (FEA), apply Karmals formula for computation changing density. proposed achieves good tendency between measurement results. Moreover, efficiency reduced 1/12 that classic methods. can be used complex simplified tread patterns tires predicting.

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Upgrading micronized rubber powder (MRP) for large-scale reuse in tires by chemically activating the powder to improve performance. The activation involves treating the powder with silane during grinding to prevent sticking and using silica as a dusting agent. This functionalizes the powder surface to enhance vulcanization and dispersion in rubber compounds. The activation step involves contacting the powder with silane, silica, peroxides, or other activators. This allows using lower amounts of MRP in tire formulations compared to unactivated powder, which improves properties like tear strength, abrasion resistance, and dynamic performance.

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Fully bio-based, highly filled lignin-rubber masterbatch for replacing carbon black in rubber. The masterbatch is prepared by mixing modified lignin with rubber. The lignin is modified by esterification with acetic acid and oleic acid to improve compatibility with non-polar rubbers. The modified lignin has reduced hydroxyl group content compared to unmodified lignin. The esterification reaction provides hydrophobic groups to decrease lignin polarity. This improves lignin dispersibility in the rubber matrix.

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Additive composition for improving properties of silica-filled rubber compounds in tires, such as fuel economy, traction, and wear resistance. The composition comprises a reaction product of fatty acid and polyamine. It is added to silica-filled rubber compounds, like tire treads, at low parts per hundred (phr) levels. The additive enhances silica dispersion and reduces payne effect, without affecting key rubber properties like viscosity, scorch, hardness, tensile strength, elongation, abrasion, and modulus. This enables improved tire performance, including lower rolling resistance, enhanced winter/dry traction, and better dry handling, without compromising other properties.

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Polysaccharide-elastomer masterbatch for making reinforced rubber compositions with reduced water content. The masterbatch is made by mixing a polysaccharide dispersion with an elastomer latex and then coagulating and drying the mixture. This avoids adding water during masterbatch production, allowing lower water content in the final rubber compound. The polysaccharide provides reinforcement and reduces rolling resistance compared to carbon black. The masterbatch can be used in applications like tires, belts, footwear, coatings, etc.

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Silica-filled rubber compound for tires with high stiffness and reduced rolling resistance. The compound contains a specific additive with a dipole moment over 2 Debye, polar groups at one end of a hydrophobic carbon chain, and crosslinks only at the other end. This additive enhances silica dispersion and stiffness without increasing hysteresis compared to traditional plasticizers. The compound has a balance of stiffness and rolling resistance exceeding 1.15 in E'/TanD ratio.

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Tire tread design that improves rolling resistance while maintaining wet grip and reducing maximum lateral force for vehicles like SUVs and vans. The tread has a center section with a different rubber composition compared to the shoulder sections. The center rubber has lower storage modulus at 1% strain and higher glass transition temperature compared to the shoulder rubber. This allows lower rolling resistance and improved wet grip without sacrificing maximum lateral force. The center rubber composition can contain a styrene/alpha-methylstyrene copolymer resin.

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Rubber composition for truck tires with improved rolling resistance and wet grip while maintaining wear resistance. The composition contains 70-95 phr of polyisoprene and 5-30 phr of a low Tg SBR functionalized for silica coupling. It also has 40-80 phr of predominantly silica filler. This combination provides a balance of wear, wet, and rolling resistance properties for reduced environmental impact and safety in truck tires.

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Polymeric compositions for tire rubber with improved properties like reduced hysteretic loss and payne effect, and reduced aging degradation. The compositions contain a specific amount (10-95 mole %) of functionalized polydienes made by reacting reactive polydienes with a terminating agent containing an imine-containing hydrocarbyloxy silane group. This functionalization provides benefits like reduced hysteretic loss and payne effect in the rubber. The compositions also have stabilized rheology and reduced aging compared to higher functionalization levels.

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Functionalizing polydiene polymers like styrene-butadiene rubber (SBR) by modifying the backbone using silylating grafting agents. The grafting agents are synthesized by reacting siloxanes, compounds with a vinyl group and substituent, and a catalyst. The grafting agents are then used to hydrosilylate the polymer post-polymerization, incorporating multiple functional groups on the backbone. This improves properties like rolling resistance, wet traction, and filler interaction.

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Cured rubber compositions for tires with improved properties like filler dispersion, lower rolling resistance, and better snow traction. The compositions contain silylated polydiene polymers derived from diene monomers like styrene and butadiene. The silylation involves grafting a silylating agent with a functional group onto the diene polymer. The silylated polydiene polymer improves tire compound performance when cured.

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Tire design with reduced rolling resistance while maintaining electrical conductivity. The tire has specific sidewall and chafer rubber compositions with lower electrical resistance compared to the rest of the tire. This creates a voltage path from the rim to the ground through the sidewalls and chafers. The lower resistance sidewall/chafer rubber allows the tire to dissipate static charge to the environment. The rest of the tire components like tread, belt, and carcass have higher electrical resistance. This provides a balance between reduced rolling resistance from less carbon black in those areas and sufficient conductivity from the sidewalls/chafers.

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Rubber composition for tire sidewalls that improves rigidity, low rolling resistance, and crack resistance. The composition contains natural rubber, polybutadiene rubber, silica, carbon black, and a specific type of terminal-modified liquid polybutadiene rubber. The terminal-modified liquid polybutadiene improves dispersion and bonding of the silica filler, enhancing rigidity and crack resistance without sacrificing low rolling resistance. The composition balances performance by optimizing the ratios of natural rubber, polybutadiene, silica, carbon black, and terminal-modified liquid polybutadiene.

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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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A rubber composition for tire treads that minimizes trade-offs between wet road braking performance, wear resistance, and fuel efficiency. The composition contains a reinforcing filler like silica, along with a specific ratio of a high surface area silica and a plasticizer. This balance of filler and plasticizer improves both wet road braking and wear resistance without sacrificing fuel efficiency compared to conventional tire tread rubber compositions.

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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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Pneumatic tire that can improve the performance of the tire and reduces the investment of equipment. The tire is formed with a tread layer and shoulder rubber, wherein the shoulder rubber is arranged on two sides of the tread layer and the tread layer comprises an upper tread rubber, a lower tread rubber and a base rubber; the upper tread rubber is responsible for the tread performance such as abrasion, wet land braking, control and the like and controls rolling resistance and control, and the lower layer tread adopts a carbon black formula or a carbon black white carbon black combined formula to provide lower rolling resistance and higher modulus to achieve the high control and low rolling resistance performances of the tire.

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High-performance car tire tread rubber composition that provides improved wet, dry, handling, and rolling resistance performance compared to conventional tire tread compounds. The composition uses specific combinations of styrene-butadiene rubbers, fillers, resin-reinforced rubber, silica with different surface areas, and silane coupling agents to achieve the balance of performance. The mixing method involves using two types of styrene-butadiene rubber, high filler content, a resin-reinforced rubber, silica with varying surface areas, and two silane coupling agents.

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A rubber composition for tire tread that balances rolling resistance, wet road braking, and wear performance. It uses silica as a filler to disperse well and improve wet grip. To balance rolling resistance, it contains a low molecular weight neodymium-catalyzed butadiene rubber with narrow chain distribution. The composition also includes lithium catalyst butadiene rubber for improved rolling resistance and wear. The specific filler ratios are: 5-50 parts silica, 5-50 parts carbon black, 10-30 parts styrene-butadiene rubber or 10-30 parts neodymium-catalyzed butadiene rubber, and 10-20 parts lithium catalyst butadiene rubber.

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Tire tread rubber with a five-component material structure that provides low rolling resistance and good wet grip. The tread rubber has two layers with different upper and lower compositions. This allows the upper layer to have lower rolling resistance while the lower layer has better grip. The five components are compounded and extruded into the tread shape. After vulcanization, the interfaces between the layers crosslink to prevent separation. The resulting tread provides a tire with low rolling resistance, good wet grip, and control performance.

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Rubber composition for tires that reduces heat buildup and improves modulus for better tire performance. The composition contains diene rubber with tin-modified polybutadiene, carbon black, silica, a silane coupling agent, and an amino group-containing compound selected from formulas (1) and (2). The compound improves low heat buildup while the tin-modified polybutadiene improves modulus. The composition can be used in tire treads to reduce rolling resistance and improve steering stability.

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Rubber composition, vulcanized rubber, and tire for improved braking on ice while maintaining low rolling resistance. The rubber composition contains specific ratios of natural rubber, polybutadiene rubber, and styrene-butadiene copolymer rubber. It also has a filler containing silica with at least 50% of the silica in the phase containing polybutadiene and styrene-butadiene copolymer rubber. This composition provides low modulus at low temperatures (-20°C) with high hysteresis loss for ice grip, without compromising wear 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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Tire rubber composition and tire with improved vulcanization speed and silica dispersion for low rolling resistance tires. The composition contains specific amounts of silica, plasticizer, styrene-butadiene rubber, and an aminoguanidine weak acid salt. The aminoguanidine salt improves vulcanization speed and silica dispersion in the rubber. The composition can further contain other rubbers like natural rubber.

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Rubber composition that reduces rolling resistance while maintaining the grip properties of the resulting rubber composition on wet road surfaces. The composition includes a rubber component, a white filler containing silica, a silane coupling agent, and a compound such as monoalkanolamide in order to improve the dispersibility of silica in the rubber composition.

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Tire tread compound with a five-component rubber structure that provides low rolling resistance, high wet grip, and good handling control. The tread compound has an upper layer and lower layer made of different rubber formulations. This two-part structure allows optimizing rolling resistance in the lower layer while maintaining grip and control in the upper layer. The compound can be used in electric vehicle tires to improve driving range. The tires have a tread made using the compound.

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