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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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 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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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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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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Rubber composition for self-sealing tires with improved adhesion, sealing performance, fluidity, and processability. The composition contains a butyl rubber, liquid polymer, organic peroxide, and crosslinking activator. The liquid polymer has specific kinematic viscosities at 100°C and 40°C. The organic peroxide and crosslinking activator are in a specific range. This composition provides better properties like tensile elongation, adhesion, sealing, fluidity, and processability compared to similar compositions lacking these ingredients.

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Using hydrocarbon polymer modifiers with functional groups to anchor them to fillers and/or elastomers in rubber compounds. This anchoring improves long term elastomeric performance, such as in tires. The modifiers are made by interpolymerizing hydrocarbon monomers like piperylenes, cyclic pentadienes, aromatics, limonenes, pinenes, and amylenes. Functional groups on the modifiers can be used to couple them to fillers like silica during rubber processing. This anchoring prevents migration of the modifiers to the surface over time and maintains compound properties. The functionalized modifiers can also be pre-reacted with crosslinking agents like organosilanes before adding them to the rubber mix.

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Rubber composition for tire with improved processability, low loss property, breaking resistance, and wear resistance. The composition contains a glycerin fatty acid ester, a silane coupling agent, and an activator added during kneading without the vulcanizing agent. This improves silica dispersion, reduces pre-vulcanization viscosity, and enhances low loss properties. The activator can be thioureas, ammonium thiocyanates, cysteines, thiadiazoles, zinc dialkyl dithiophosphates, or benzothiazoles. The fatty acid component of the ester is 10-90% of the total fatty acids.

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Polymer with pendant associative groups along its chain that improves dispersion of fillers in compositions like tire rubber. The polymer has units derived from butadiene and styrene, as well as pendant subunits grafted onto some of the backbone units. The grafted subunits contain associative groups like imidazolidinyl, triazolyl, triazinyl, ureido-pyrimidyl, or nitrogen-containing dipoles. These associative groups promote interaction between the polymer and fillers like carbon black or silica to improve filler dispersion and reduce hysteresis when the polymer is used in compositions. The polymer is made by grafting the modifying agent containing the associative groups and reactive group onto a diene polymer like SBR.

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Rubber composition for tire manufacture that uses thiazoline compounds as vulcanization accelerators instead of traditional accelerators like sulphenamides. The composition contains diene elastomers, reinforcing fillers, and a thiazoline-based vulcanization system. The thiazoline accelerators improve rheometric properties compared to conventional accelerators. The composition can have improved green strength, processability, and cure kinetics.

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Functionalizing rubber to improve filler compatibility and vulcanization properties for better tire performance. The functionalization involves adding terminators to the ends of rubber chains during polymerization to create functionalized rubber. The terminators are compounds like ethylene sulfide and chlorotriethoxysilane. This functionalization enhances the rubber's affinity for fillers like carbon black and silica. It reduces hysteresis (rolling resistance) and improves traction compared to unfunctionalized rubber. The functionalization can be done during polymerization using multifunctional initiators to end-cap the chains with metals from group I or II.

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Rubber composition for tires that improves rheometric properties and vulcanization performance compared to conventional accelerators. The composition uses a specific thiadiazole compound as the vulcanization accelerator. It also contains diene elastomers, reinforcing fillers, and a vulcanization system. The thiadiazole compound has a formula with a thiadiazole ring and a substituent like an amine. The composition can be used in tire manufacturing to provide similar rheometric properties to conventional accelerators while improving vulcanization performance.

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Rubber composition suitable for cushion rubbers of tires retreaded by using particularly a pre-cure tread (PCT) retreading method for adhering a vulcanized pre-cure tread rubber onto a buffed tire casing via an unvulcanized cushion rubber, wherein retreaded tires are produced and reused by replacing tread rubbers of pneumatic tires such as truck and bus tires (TBR) and aircraft tires in which tread rubbers are worn down. The composition comprises 0.3 to 2.5 parts by mass of aldehydeamines, 0.1 to 1.5 part by mass of at least one compound selected from a group consisting of tetra(2-ethylhexyl)thiuram disulfide, and a vulcanization accelerator such as benzothiazyldisulfide a vulcanization ultra-accelerator such as tetrabenzylthiuram disulfide, and an amine activator for curing.

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Preparing rubber compositions with improved filler-polymer interaction by in situ functionalization of the elastomer with organoaminoalkoxysilanes during mixing with fillers like precipitated silica. This involves reacting the elastomer with alkoxysilanes containing amino groups in the absence of primary/secondary amines to form elastomer-filler bonds. This improves filler dispersion and rubber reinforcement compared to traditional methods. The in situ functionalization allows tuning filler-polymer interaction without modifying the filler surface or adding extra compounds. The functionalized elastomer compositions can be used in tires, for example.

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