Techniques to Reduce Tire Rolling Resistance

Rubber composition for all-weather tire treads that provides good balance of wet grip, snow traction, and rolling resistance. The composition contains specific elastomer components, fillers, resins, oils, and cure package. The elastomer blend has a polybutadiene base with a high cis content, low Tg, and small amount of styrene-butadiene rubber. The filler is silica with moderate surface area. The resin has a mid Tg. The oil amount is moderate. The cure package has specific accelerators, activators, and inhibitors. This composition provides wet grip, snow traction, and rolling resistance balance for all-weather tires.

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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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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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Coated silicone hydrogel contact lenses with improved comfort and reduced uptake of antimicrobial agents. The coated lenses have a unique layered structure with hydrogel coatings on the front and back surfaces. The coatings are made by immersing the contact lens precursor in a buffered solution, heating it to crosslink, and then removing the lens. This process forms a hydrogel coating on the lens surfaces. The coated lenses have superior surface softness, good hydrophilicity, and lower polyquaternium-1 uptake compared to uncoated lenses.

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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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Tire with optimized snow performance and low rolling resistance by using specific narrow groove patterns in the shoulder and center regions. The shoulder has alternating linear/arc shaped narrow grooves, while the center has an angled narrow groove connected to the main groove and a separate narrow groove that extends circumferentially. This configuration improves snow traction without sacrificing rolling resistance by providing biting edges in the shoulder and center that enhance grip on snow while minimizing voids for reduced rolling resistance.

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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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Tire design with improved rolling resistance and durability by using an apex configuration between the bead and carcass ply. The tire has an apex with three layers: an outer tapered apex body, an intermediate harder strip apex, and an inner softer apex body. This gradual stiffness transition between the apex and carcass ply reduces concentration of stress at the outer end of the apex body compared to a single apex layer.

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Rubber composition and product with improved balance between low and high strain hysteresis losses. The composition contains a rubber component like natural rubber, butadiene rubber, or styrene-butadiene rubber, along with a specific compound containing thiol and amino groups. This compound helps balance hysteresis losses at low and high strains when the rubber is vulcanized. The vulcanized rubber has reduced loss at low strains for better low-speed properties, as well as increased loss at high strains for better fatigue resistance.

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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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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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Tyre pressure plays a vital role in dynamic control over the vehicle and enhancing overall fuel efficiency by lowering rolling resistance and, as result, tractive effort. Excessive speeding causes traction loss, which is primary cause of accidents. Wet roads make driving more perilous, hence majority accidents occur during rainy season. As worlds crude oil sources deplete electric car industry expands, it critical to extend range currently existing automobiles improving its efficiency. In order find solution above problems, authors investigated impact tyre on coefficient friction designed developed regulating system that uses an infrared rpm sensor track rate at tires rotational speed decreases function time, then information calculate ideal based current environmental conditions data from various accelerometers. This unique automatically changes provide best combination driver safety sensors detecting slip lateral acceleration, regardless road surface conditions.

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A method to reduce rolling resistance and tire temperature in electric vehicles by controlling lateral forces during straight line driving. The method involves designing asymmetric tire internal structures and external profiles that generate opposite lateral forces when the tire rolls straight. One force comes from the tire's internal structure (called Ply-Steer) and the other from the vehicle's camber angle (called Camber Force). By making the forces opposing, it reduces the net lateral force and rolling resistance compared to a symmetric tire. The method can be used to optimize tire designs for electric cars that tend to have higher lateral forces due to regenerative braking.

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A tyre heating system for vehicles like trucks that can increase range by capturing excess electrical power generated during braking and using it to heat the tires instead of wasting it. The system has an electric power source like an electric motor or fuel cell that generates excess power during braking. When this exceeds the battery charging capability, it feeds the excess to the tire heating system. This avoids wasting the power and uses it to heat the tires, reducing rolling resistance and improving range.

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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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Rubber composition for tire treads that provides improved wet performance, rolling resistance, and snow traction compared to traditional tire tread compounds. The composition contains a specific blend of elastomers, fillers, resins, and curing agents. The elastomer blend includes a low styrene content SBR with a low glass transition temperature, along with polybutadiene. The SBR has functional groups for improved adhesion to silica filler. The composition also contains a blocked mercapto organosilane coupling agent for better silica bonding. This combination provides a balance of wet traction, rolling resistance, and snow traction for all-season and winter tires.

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