Activators for Tire Vulcanization

RFID tag coating rubber composition for tires that balances communication performance, crack resistance, adhesion, and elastic modulus. The composition contains a rubber component, sulfur, silica, and a guanidine-based vulcanization accelerator. The sulfur is mainly insoluble and has a high content of 6.0 parts by mass per 100 parts rubber. The insoluble sulfur improves elastic modulus without blooming or tackiness issues. The guanidine accelerator prevents modulus loss and vulcanization decay.

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Rubber compounds for pneumatic tires containing recycled carbon black from end-of-life tires with improved properties compared to untreated recycled carbon black. The recycled carbon black is treated with aminoacidic compounds containing thiol groups or disulfide groups to activate the surface. This treatment enhances the surface reactivity of the recycled carbon black compared to untreated recycled carbon black, allowing it to better reinforce the rubber compound. The treated recycled carbon black can partially replace virgin carbon black in tire compounds without significantly degrading mechanical properties like abrasion resistance and tensile strength.

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Compounds with multiple organic thiosulfate groups for improving aging, adhesion, and vulcanization properties in rubber compositions. The compounds are represented by formula I: S,S′,S″-((1,3,5-triazinane-1,3,5-triyl)tris(R1-1,1-diyl)) tris(sulfurothioate), where R1 is a methyl, ethyl, or propyl group. These compounds can be made by reacting a haloalkylamine hydrohalide with a metal thiosulfate to form a Bunte salt, followed by deprotonation and reaction with an aldehyde. They can be used in vulcanizable elastomeric formulations at 0.1-5 parts per 100 parts elastomer to improve aging, adhesion, and

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Rubber composition for non-pneumatic tire spokes that provides ozone resistance and adhesion to cords without compromising fatigue and tear strength. The composition contains ethylene-propylene-diene terpolymer (EPDM) rubber along with a lower amount of another elastomer like natural rubber or polyisoprene. This balance improves ozone resistance while maintaining properties like adhesion and tear strength. The composition also includes reinforcing fillers like carbon black and silica for improved tear strength and degradation resistance. The curative system includes vulcanizing agents, accelerators, activators, inhibitors, and anti-scorching agents for curing the rubber.

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Preparing elastomeric compounds for tyres with reduced zinc content, characterised by the incorporation of particular vulcanisation-activating fillers and by a precise sequence of adding some components of the compound. The preparation includes a number of components of the compound, a certain number of fatty acids, at least one product comprising zinc directly bound to a white filler, and at least one compatibilising agent (silane).

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Triazinane derivatives with three aminecarbotrithioate end-groups that act as both cross-linking agents and vulcanization accelerators in rubber compounds. These triazinane compounds, like (1,3,5-triazinane-1,3,5-triyl)tris(propane-3,1-diyl) tris(dibenzylcarbamo(dithioperoxo)thioate), have dual effects during rubber vulcanization: they cross-link the rubber matrix by splitting their disulfide bonds, and they accelerate vulcanization by generating dithiocarbamate radicals. The compounds can be synthesized by reacting triazinane compounds with dithiocarbamate salts in water.

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A novel silane compound for improving properties like rolling resistance, grip, and stiffness in rubber mixtures used in vehicle tires. The silane has a specific structure with a spacer group between the silicon atom and the sulfur-containing functional group. It can be added to rubber mixtures during compounding to enhance tire performance. The silane can be prepared by reactions like thiol-ene addition and hydrosilation.

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Silane compound for improving dispersion and adhesion of inorganic fillers like silica in rubber compositions. The compound has a structure with an alicyclic ring containing an olefin bond and a silyl group. It provides better reinforcement and viscoelastic properties in rubber compounds with silica fillers compared to traditional silane coupling agents with high polarity groups. The compound also improves adhesion in sealant and adhesive compositions containing inorganic fillers. The compound can be used in rubber, sealant, and adhesive compositions along with the filler and polymer to provide better dispersion and adhesion between the filler and polymer.

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A laminate structure for tire inner liners that improves adhesion between the thermoplastic film and rubber layer. The rubber composition for the layer contains specific chemical additives. It has a rubber component, a condensate made from a phenolic compound and formaldehyde, and a methylene donor. This combination improves the adhesion between the thermoplastic film and rubber layer in the laminate.

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A silane compound for improving the durability of rubber compounds used in vehicle tires. The silane has a specific structure with functional groups that provide benefits when added to rubber mixtures. The silane has a urea group (-HNC(═O)NH-) for bonding to the rubber, an acid amide group (-HNC(═O) or -C(═O)NH-) for reacting with double bonds in the rubber, and alkoxy groups (-ORn, where R is an alkyl or aryl group) on the silicon atom for crosslinking during vulcanization. The silane improves tire durability by enhancing the rubber-silane bond strength, increasing rubber-silane crosslinking, and facilitating silane grafting onto the rubber.

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A silane compound with high reactivity with organic polymers like rubber and high affinity with inorganic materials like silica or glass. The compound has a unique reactive functional group with low polarity and a hydrolyzable group. It improves dispersion and adhesion properties when mixed with low-polarity materials like rubber. The compound is useful as a silane coupling agent in rubber compositions and as an adhesion aid in adhesives and sealants. It can be synthesized by hydrosilylation of an alicyclic epoxy compound with trimethoxysilane or triethoxysilane in the presence of a hydrosilylation catalyst.

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A silane compound for improving the handling and stiffness properties of rubber compounds, particularly in vehicle tires. The silane has a specific structure with an aromatic group containing an acid amide functional group on each side, connected by a silicon atom. It can be added to rubber mixtures during mixing to enhance the rubber properties. The silane adsorbs onto fillers like silica in the rubber compound. The modified filler-silane hybrid then improves the rubber stiffness and handling properties compared to conventional silanes.

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Rubber compound for making rubber products like tires without using zinc oxide as a vulcanization activator. The compound replaces zinc oxide with halogenated graphite. This allows reducing or eliminating zinc oxide for environmental benefits without compromising vulcanization and mechanical properties. The compound consists of a cross-linkable polymer base, reinforcing filler, sulfur, accelerants, and halogenated graphite as the sole vulcanization activator.

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Polymer compound for modifying rubber, like tire rubber, to improve wet grip, abrasion resistance, and silica reinforcement. The compound contains a specific structure that provides functional groups when reacted with rubber. The modified rubber has better affinity and bonding to fillers like silica compared to unmodified rubber. This enables lower silane coupling agent requirements for silica reinforcement. The compound structure is a polymer with a terminal group represented by formula 1: R1-R6 are alkyl or aryl, R7-R10 are alkylene or arylene, and X1-X2 are alkoxy or ester.

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Rubber composition for self-sealing tires that improves adhesion, sealing performance, fluidity, and processability. The composition contains a specific combination of a butyl rubber, liquid polymer, organic peroxide, and crosslinking activator. This composition allows the sealant to have properties like good tack, air sealing, elasticity, and flow resistance at high temperatures, preventing sealant migration and leakage. The composition can be applied to the inner liner of tires to seal punctures. The sealant adhesion, processability, and sealing performance are optimized by adjusting the distances between the tire and nozzle during application.

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Rubber composition for tires that improves abrasion resistance without sacrificing vulcanization rate. The composition contains a hydrogenated aromatic vinyl-conjugated diene copolymer with high hydrogenation ratio (80 mol% or more) and molecular weight of 300,000 or more. It also has 0.3 to 3 parts of a thiuram accelerator. The high hydrogenated copolymer provides abrasion resistance while the thiuram accelerator maintains vulcanization rate.

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Rubber composition and tire with improved abrasion resistance by optimizing the distribution of vulcanization accelerators during compounding. The composition contains a sulfur atom-containing accelerator that disperses better in the rubber before adding fillers. This reduces adsorption of the accelerator onto fillers, allowing more uniform crosslinking during vulcanization. The dispersed accelerator is combined with a separate non-sulfur releasing accelerator. This prevents excessive crosslinking during kneading. The composition also contains zinc oxide as a catalyst carrier. The dispersed accelerators and filler-kneaded rubber are mixed with sulfur. This provides more uniform crosslink density and better abrasion resistance.

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Rubber composition with improved vulcanization rates for tire rubber, vibration dampers, belts, etc. The composition contains a vulcanization aid compound with a specific structure. The aid compound has an active group represented by formula (W) with a single bond connecting Z1 to another group. This group accelerates vulcanization of rubber components. The aid compound can have other substituents. The vulcanization aid improves cure rates when added to rubber compositions for products like tires.

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A method for producing a vulcanized rubber composition with improved low temperature grip and reduced rolling resistance compared to conventional rubber compounds. The method involves adding a specific compound called aminoguanidine during the initial kneading step before vulcanization. The aminoguanidine compound helps control the rubber's glass transition temperature and loss tangent at 0°C and 60°C. This allows enhancing grip at low temps while reducing rolling resistance. The final vulcanized rubber composition contains the rubber, filler, coupling agent, aminoguanidine, sulfur, and vulcanization accelerator.

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Inner liner material for tires with improved adhesion between the liner film and rubber layer. The laminate comprises a thermoplastic resin/elastomer film and a rubber layer. The rubber composition contains a specific condensate of a phenolic compound like resorcinol and formaldehyde, along with a methylene donor. This improves adhesion at the interface between the thermoplastic film and rubber layer in the tire inner liner.

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