Tread Bonding Enhancement for Tire Manufacturing

Statistical copolymers containing vinylbenzocyclobutane (VBCB) monomer units for improved crosslinking in rubber compositions like tire treads. The copolymers have a statistical distribution of conjugated diene and VBCB monomers along the chain. This improves crosslinking density and distribution when cured compared to copolymers without statistical distribution. The copolymers are made by anionic polymerization with an initiator and randomizing component. The VBCB monomer forms crosslinks with both itself and the polymer backbone. The statistical distribution disperses VBCB units throughout the chain versus clustering or alternating.

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High-strength adhesive for tire manufacturing that provides superior bonding between polyurethane tire treads and conventional rubber carcasses. The adhesive contains specific components like polyurethane prepolymer, plasticizer, silane coupling agent, filler, anti-aging agent, and nanometer oxide. This formulation enables strong and durable adhesion between the dissimilar rubber materials in composite tires. It improves tire integrity and longevity compared to conventional tire adhesives.

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A rubber compound for bonding aramid cords in aviation radial tires to improve adhesion and prevent delamination during aging. The compound contains natural rubber, styrene-butadiene rubber, a silane coupling agent, fatty acid, anti-aging agents, anti-scorch agent, and insoluble sulfur. The silane coupling agent improves bonding between the rubber and aramid fibers. The fatty acid and anti-aging agents enhance durability. The compound allows better adhesion of the aramid cords in the tire belt to prevent separation and delamination during thermal cycling.

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Producing a motor vehicle tire with improved bonding between textile cords and surrounding rubber to enhance tire durability. The method involves dipping the cords in a bath containing polyisocyanates to activate the bonding, instead of using resorcinol-formaldehyde dips. The cords are then coated with a rubber compound containing specific rubber types and carbon blacks. This avoids toxic and environmentally harmful resorcinol-formaldehyde dips while still providing adequate bonding.

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Rubber-steel cord composite for tire belts and carcasses with improved adhesion to steel cords. The rubber composition contains a specific vulcanizing agent, N, N-dibenzylbenzothiazole-2-sulfenamide, and a bismaleimide compound.

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Rubber-steel cord composite for tire reinforcement with improved adhesion properties without using cobalt compounds. It contains a rubber composition with specific ratios of sulfur, N, N-dibenzylbenzothiazole-2-sulfenamide (accelerator), hexamethylene bis-thiosulfate disodium salt dihydrate and 1,6-bis(N, N-dibenzylthiocarbamoyldithio)hexane.

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Steel cords for reinforcing rubber products like tires have improved adhesion to rubber and better aging resistance compared to traditional cords. The steel filament has an unusual amount of iron at the top surface. The iron content is higher than 4 atomic percent in a thin 3 nm layer below the surface. The iron-rich layer enhances adhesion to rubber while retaining good properties. The cord can be made by drawing wire with increased surface roughness using diamond dies, and electrolytically coating with brass.

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All-steel radial tire with interrelated constant elongation of upper and lower treads to maintain tire performance balance after tread improvements. The tire has a stacked upper tread layer A and lower tread layer B. The key is having a specific ratio of 100% modulus stress between the upper and lower tread layers: (0.7-0.8):1. This prevents breaking the tire's overall performance when improving tread performance by matching adjacent tread properties.

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Sulfur-cross-linkable rubber mixture for bonding rubber to strength members like textile or metallic cords in tires, belts, and hoses. The mixture contains novolac resins and etherified melamine resins to replace resorcinol as adhesive promoters for improved adhesion. The novolac resins are produced from a phenolic compound, aldehyde, and carbamate resin. The mixture also contains rubber, carbon black, silica, plasticizers, stabilizers, vulcanization activators, accelerators, and sulfur.

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A pneumatic tire design that enables improved adhesion between a hydrogenated copolymer rubber and a diene rubber in a tire while maintaining the wear resistance of the hydrogenated rubber. The tire includes a rubber member A containing a hydrogenated copolymer, sulfur, and a triazine-thiol compound. Rubber member B contains sulfur and a diene rubber. The hydrogenated copolymer has a high molecular weight and high hydrogenation level. The triazine-thiol compound provides adhesion between the copolymer and diene rubber.

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Method to improve adhesion between the support structure and tread in non-pneumatic tires without using specialized resins. The method involves modifying the outer surface of the support structure in the radial direction to have wetting tension of 40-60 mN/m. This is achieved by surface treatments like corona or plasma treatment. Then a vulcanizing adhesive is applied to the modified surface and vulcanized to bond the support and tread. This ensures good adhesion without requiring resins with specific chemical structures or properties in the support structure.

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A method to manufacture non-pneumatic tires with improved adhesion between the support structure and tread without using resin-containing support structures. The method involves sequentially applying a first adhesive with higher affinity for the resin and a second vulcanizing adhesive to the support structure. This improves compatibility between the adhesives and the resin. The vulcanization bonds the support structure and tread to ensure adhesion without needing a resin-containing support.

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Polybenzoxazine adhesive for bonding metal to rubber that has improved thermal and chemical stability compared to conventional adhesives. The adhesive is made from a thermosetting polymer derived from benzoxazine monomers containing sulfide groups. The polymer can coat metal surfaces and bond to rubber for metal/rubber composites like vehicle tires. The adhesive has the same initial adhesion as conventional rubber/metal adhesives but with improved long-term performance due to its chemical stability.

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Tire design that reduces rolling resistance while ensuring wear resistance in limit run. The tire has a thin tread with reduced thickness in the shoulder region. To prevent separation of the thinner cap layer from the carcass in the shoulder, fixation layers are added between the cap layer and carcass. The fixation layers have higher adhesion than the cap layer to securely join the cap, base, and carcass. This prevents exposure of the more brittle base layer in the shoulder when contacting the road in limit run. The cap layer loss tangent is lower than the base layer to reduce rolling resistance.

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Cord for reinforcing elastomers like rubber that has better adhesion to elastomers compared to conventional steel cords. The cord is made by twisting together metallic filaments with resin filaments. An inorganic filler is added to the resin filaments which improves adhesion to rubber during vulcanization.

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Adhesive composition for tire cords that improves adhesion between tire rubber and tire cords while maintaining strength of the cords. The composition is environmentally friendly as it does not contain resorcinol-formaldehyde resin. The composition contains a reaction product of an epoxy resin and a diol compound, a water-dispersible polyurethane, and an isocyanate compound. The reaction product improves adhesion to rubber, the polyurethane provides flexibility, and the isocyanate crosslinks the adhesive to the cord.

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Ensuring quality of tire tread components during manufacturing to improve tire life by preventing defects like air bubbles in the shoulder. The process involves laminating the tread onto the base rubber after the belt layer is already applied. This eliminates the need for manual pressing and observation at the end to fix quality issues. After lamination, the base rubber is roughened and cleaned to improve adhesion between the tread and base. This prevents air bubbles and other defects in the tread pressing step since the base is already in place.

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An environmentally friendly adhesive composition for tire cords that improves tire cord strength while enhancing adhesion between the tire rubber and tire cord. The composition does not contain the harmful RF resin commonly used in tire cord adhesives. It uses a unique formulation of water-dispersed polyurethane and an epoxy resin reacted with a diol compound. The adhesive composition is applied to tire cords during tire manufacturing to enhance adhesion to the rubber without negatively impacting cord stiffness. This provides improved tire cord strength and durability while avoiding the environmental and health concerns of traditional RF resin-based adhesives.

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A tire design that improves adhesion between the cord and compound layers to prevent delamination in high-temperature, high-humidity conditions. The tire has a cap ply with first cords coated in a rubber compound containing silica, and a body ply with second cords coated in a rubber compound containing silica. This silica-containing compound on the cords improves adhesion between the cord and compound layers, preventing delamination in harsh environments.

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Rubber composition for metal adhesion in tires that improves the adhesiveness between the rubber and metal reinforcing cords after aging. The composition contains cinnamic acid and/or cinnamic alcohol blended with a diene-based rubber containing 80% or more natural rubber or synthetic isoprene rubber. The cinnamic acid/alcohol amount is 0.5-10 parts per 100 parts rubber. This composition provides sufficient hardness and improves metal adhesion compared to conventional rubber compositions for metal adhesion.

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