Tread Bonding Enhancement for Tire Manufacturing

Retreading tires without using a curing chamber by facilitating adhesive curing using moisture. The method involves applying a primer to the tire casing and tread, then an adhesive over the primer. A moisture reservoir is coupled to the tread near the bondline. Enclosing the tread, casing, and reservoir in an envelope and vacuuming out the air to apply pressure. This facilitates curing of the moisture-curing adhesive using the moisture reservoir instead of a curing chamber.

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Recycled carbon black with improved properties for reinforcing rubber products. The recycled carbon black has a modified surface condition with specific characteristics that enhance bonding with rubber components. The modifications involve oxidative decomposition of rubber residuals on the carbon black surface followed by filling pores with carbide. This removes rubber carbide adhering to the carbon black and exposes the surface for better rubber bonding. The modified carbon black has a nitrogen surface area of 50-250 m2/g, a Raman peak intensity ratio of 1580/1350 cm-1 of 84-111, and fewer defects compared to unmodified recycled carbon black.

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Rubber compounds with improved properties for tire treads by combining functionalized diene polymers with silica fillers derived from biomass ash like rice husk ash. The diene polymers are functionalized with polar groups like -OX, -OR, -COOX, -COOR, -N(R1)(R2)X or -Si(R3)(R4) where X is a cation and R are alkyl groups. This functionalization allows better compatibility and adhesion between the polymer and silica filler. The biomass ash silica has specific cation distribution from the ash digestion process. Using this functionalized diene polymer and silica filler combination improves properties like rebound resilience, tensile strength, and damping performance compared to standard diene polymers with conventional silicas.

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Metallic reinforcing cord for tires that allows good adhesion to the surrounding elastomeric material without the need for coatings or treatments. The cord has a unique helical geometry where the metallic wires are spaced apart at certain cross sections to allow penetration of the elastomeric material. The cord consists of two or more twisted metallic wires with a predetermined twisting pitch. The spacing between the wires changes along the cord length to balance penetration and rigidity. This provides a metallic cord with a behavior similar to textile cords with low modulus at low loads, and high modulus at high loads.

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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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Vulcanization bonding composition for producing laminates with improved adhesion between epoxy-containing rubber layers and fluororubber layers. The composition contains an epihalohydrin rubber, a hydroxyl-free tri- to penta-functional acrylate, an epoxy resin, nickel dibutyldithiocarbamate antioxidant, and a vulcanizing agent. This composition allows strong adhesion between the rubber and fluororubber layers when vulcanized, even using steam vulcanization. The hydroxyl-free acrylate prevents capture of radicals by hydroxyl groups during vulcanization.

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ABSTRACT A facile strategy to improve silica dispersion and enhance the dynamic performance of silicafilled green tire treads is herein proposed. In this study, sulfurized (Z)sorbitan mono9octadecenoate (SS80) was synthesized characterized using Fourier transform infrared (FTIR) spectroscopy, gel permeation chromatography (GPC), liquid chromatographymass spectrometry (LCMS), elemental analysis. It confirmed that (S80) can react with sulfur form larger molecular weight SS80 disulfur or polysulfur bonds. subsequently used in conjunction bis (triethoxysilylpropyl)disulfide (TESPD) modify prepare silica/SSBR composites. Particle size analysis transmission electron microscopy (TEM) revealed incorporating reduced particle modified enhanced its composite. Dynamic mechanical analyzer (DMA), rubber process (RPA), tests demonstrated composites exhibit loss, modulus, improved wear resistance, maintained propertiesprimarily due dispersion. Overall, study provides a universal costeffective for enhancing dispersibility hydrophobic matrix.

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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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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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Retread tire with improved durability to prevent separation of the recapped tread from the base tire. The retread has a recapped tread with dimples on the inside edge that extends into the tread. The dimples have a maximum diameter of 2-5 mm and depth of 1-3 mm. These dimples help prevent separation by absorbing and dissipating heat generated during driving, reducing the risk of the tread separating from the base tire.

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Process to make composite materials for elastomeric products like tires with improved sustainability and adhesion. The process involves activating textile reinforcement yarns with a bath containing polyisocyanates, waxes, and surfactants before immersing them in the rubber mixture. This coating improves adhesion between the yarns and surrounding rubber. The coated yarns are then used to create the composite material. The activation bath can be made from recycled materials like post-consumer PET bottles. The composite with recycled yarns provides similar performance to conventional composites but with lower environmental impact. The vulcanized composite material and resulting elastomeric products, like tires, have improved sustainability and adhesion compared to conventional composites.

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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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ABSTRACT In this study, the effect of (2,3epoxypropoxy)propytrimethoxysilane(KH560) concentration on relationship between filler and rubber matrix is investigated by using tannic acid (TA) tetraethylenepentamine (TEPA) as intermediate reaction platforms for KH560modified hollow microspheres (RiM02) to enhance interfacial bonding RiM02 natural (NR). process, oxidized highly reactive quinone in TA reacts with amino group TEPA a Schiff base reaction. This followed accelerating rate metal ion complexation Fe 3+ . Finally, KH560 epoxy it ringopening The NR/RiM02@KH560 composites are prepared mechanical blending method. results show that adding improves vulcanization crosslinking degree composites, also improved. Compared unmodified RiM02, tensile strength, tear abrasion resistance RiM02TA@KH5609 improved 19.46%, 12.83%, 18.42%, respectively. Meanwhile, most significant, possess best rolling thermooxidative aging resistance. These findings provide reference value fillers reinforce rubber.

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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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