Materials to Reduce Tire Rolling Resistance

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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A double-layer tire tread design that reduces rolling resistance while maintaining good braking performance. The tire has an upper tread layer with high wear resistance and dry braking ability, and a lower tread layer with lower rolling resistance. The lower tread thickness is between 30% and 60% of the total tread thickness. This allows reducing rolling resistance by using a lower rolling resistance lower tread compound, while still maintaining adequate braking performance from the upper tread layer.

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Tire inner layer composition with improved durability and rolling resistance compared to traditional high stiffness tire compounds. The inner layer contains a rubber composition with specific ingredients to enhance durability without compromising rolling resistance. The composition uses a rubber like isoprene, carbon black filler, salt of alkaline earth metals, alkali metals, or lanthanides, and a crosslinking system. This allows improving stiffness for durability without degrading rolling resistance like conventional stiffness methods.

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