rubber tire chemicals

Gum Rosin (Rubber Tackifier)

CAS: 8050-09-7

Gum Rosin is a natural resin derived from pine trees, used as a cost-effective tackifier in NR, SBR, and other rubber compounds to improve adhesion, building tack, and green strength. Its main component, abietic acid, is soluble in rubber polymers and provides good compatibility with diene rubber systems. Rosin is also used in rubber cements, pressure-sensitive rubber adhesives, and as a starting material for esterified rosin derivatives with improved heat stability.

rubber tire chemicals

HMMM (Hexamethoxymethylmelamine) Adhesion Resin

CAS: 3089-11-0

Hexamethoxymethylmelamine (HMMM) is a methylene donor used with resorcinol to form an in-situ resin adhesion system (RF system) in rubber compounds for bonding to textile and steel cord reinforcements. HMMM is preferred over hexamethylene tetramine (HMT) due to its lower volatility, absence of ammonia release during processing, and improved bonding efficiency. The HMMM-resorcinol system is widely used in tire tread, belt, and carcass compounds where robust cord-rubber adhesion is critical.

rubber tire chemicals

HVA-2 Coagent (m-Phenylene Bismaleimide)

CAS: 17351-75-6

HVA-2 (m-Phenylene Bismaleimide) is a highly effective polyfunctional coagent used in peroxide-cured EPDM, NBR, and HNBR rubber systems to increase crosslink efficiency, reduce peroxide loading, and improve physical properties. It reacts rapidly with peroxide-generated radicals to form bis-addition crosslinks, delivering higher modulus, tensile strength, and improved compression set compared to peroxide-only systems. HVA-2 also acts as an antireversion agent in sulfur-cured NR compounds.

rubber tire chemicals

Insoluble Sulfur IS-HS (Rubber Grade)

CAS: 7704-34-9

Insoluble Sulfur IS-HS is a high-stability polymeric form of sulfur used as the primary vulcanizing agent in tire manufacturing. Unlike soluble sulfur, it prevents bloom migration to the rubber surface before vulcanization, ensuring excellent ply adhesion and uniform crosslink distribution. It is the industry standard for steel-cord and textile-cord tire compounds.

rubber tire chemicals

Liquid Polybutadiene (LBR Processing Aid)

CAS: 9003-17-2

Liquid Polybutadiene (LBR) is a low molecular weight, viscous liquid elastomer used as a processing aid, plasticizer, and tackifier in rubber compounds. Unlike conventional process oils, LBR chemically co-cures with the rubber matrix during vulcanization, contributing to the crosslinked network and maintaining or improving compound physical properties. It is particularly valuable in EPDM, BR, and SBR compounds where migration-free plasticization and enhanced tack are required.

rubber tire chemicals

Magnesium Oxide (Rubber Grade)

CAS: 1309-48-4

Rubber-grade Magnesium Oxide (MgO) is an essential activator and acid acceptor for the vulcanization of polychloroprene (CR) rubber, chlorosulfonated polyethylene (CSM), and fluoroelastomers (FKM). It neutralizes hydrochloric acid generated during processing and aging, preventing compound degradation and metal corrosion. Rubber-grade MgO is produced to have controlled activity, surface area, and particle size for consistent cure behavior.

rubber tire chemicals

Microcrystalline Wax (Rubber Grade)

CAS: 63231-60-7

Microcrystalline wax for rubber is a higher molecular weight, branched-chain wax that provides superior protection compared to paraffin wax under dynamic flex conditions. Its slower and more uniform bloom rate makes it particularly effective in tire sidewalls subjected to repeated flexing during service, preventing the wax film from cracking and losing protective function. Microcrystalline wax is often blended with paraffin wax to achieve a broad-spectrum protective wax system.

rubber tire chemicals

NBR Compound Antioxidant (PAN / Polymerized Amine)

Polymerized amine-type antioxidants (PAN system) formulated for nitrile rubber (NBR) and hydrogenated nitrile rubber (HNBR) compounds provide effective protection against thermal oxidation, ozone attack, and copper-catalyzed degradation in oil-contact environments. NBR is widely used in oil seals, fuel system components, and industrial hoses where resistance to both petroleum fluids and oxidative aging is required. This blend system is optimized for non-staining performance in natural-colored NBR goods.

rubber tire chemicals

Naphthenic Process Oil (Rubber Extender Grade)

CAS: 64742-53-6

Naphthenic process oil is a low-aromatic, low-pour-point mineral oil extender used primarily in EPDM, NR, CR, and NBR rubber compounding. It provides excellent solvation of EPDM due to its compatible chemical nature, enabling high oil loading for low-cost compounds. Naphthenic oils are also used in rubber sponge, tire inner liners, and colored rubber goods where the non-staining, light color of naphthenic oil is advantageous.

rubber tire chemicals

Oil-Treated Insoluble Sulfur IS-HS-OT20

CAS: 7704-34-9

Oil-Treated Insoluble Sulfur IS-HS-OT20 is an insoluble sulfur grade surface-treated with 20% naphthenic or process oil to suppress dust and improve dispersibility in rubber compounds. The oil coating reduces the risk of static charging during handling and facilitates uniform incorporation into rubber matrices on open mills and internal mixers. It is the preferred form for automated tire manufacturing lines.

rubber tire chemicals

PEG-4000 (Rubber Processing & Release Aid)

CAS: 25322-68-3

Polyethylene Glycol 4000 (PEG-4000) is a multifunctional rubber processing aid that improves the dispersibility of fillers, especially carbon black and silica, by coating hydrophilic surfaces and reducing filler agglomeration. In silica-filled compounds, PEG-4000 deactivates acidic silanol groups that would otherwise retard the cure system and absorb DPG. It also acts as an internal mold release agent and extrusion lubricant in various rubber compounds.

rubber tire chemicals

Paraffin Wax (Rubber/Tire Protective Grade)

CAS: 8002-74-2

Rubber-grade protective paraffin wax migrates to the surface of vulcanized rubber to form a continuous protective film that shields against ozone, UV light, and atmospheric oxidation. Specially selected for tire sidewall applications, rubber-grade paraffin wax is formulated with a controlled carbon chain length distribution and melting point range to provide effective bloom and continuous surface film formation under the temperature and deformation conditions typical of tire service.

rubber tire chemicals

Phenolic Tackifying Resin SP-1068 (Octylphenol Resol)

CAS: 9003-35-4

SP-1068 is an octylphenol-formaldehyde resol-type reactive tackifying resin that provides exceptional building tack and reinforcing properties in NR and SBR tire compounds. In addition to tackification, it acts as a reinforcing resin that crosslinks into the rubber matrix during vulcanization, contributing to hardness, modulus, and abrasion resistance. SP-1068 is also the primary component in phenolic resin cure systems for butyl and halobutyl rubber.

rubber tire chemicals

Platinum Catalyst for Silicone Rubber (LSR/HTV)

Platinum (Pt) catalyst for addition-cure silicone rubber is used in the hydrosilylation crosslinking of liquid silicone rubber (LSR) and room-temperature vulcanizing (RTV-2) systems. It catalyzes the addition reaction between vinyl-functional siloxane polymer and Si-H functional crosslinker at very low loading levels (typically 5–50 ppm Pt). The platinum catalyst enables fast, solvent-free, and by-product-free cure at moderate temperatures, producing transparent, odorless silicone vulcanizates.

rubber tire chemicals

Precipitated Silica VN3 (Tire Grade)

CAS: 112926-00-8

Precipitated Silica VN3 is a highly dispersible silica (HDS) developed specifically for use in green tire tread compounds where it replaces or partially replaces carbon black to achieve the simultaneous improvement of rolling resistance, wet grip, and wear resistance — the "magic triangle" of tire performance. When coupled with bis-TESPD or bis-TESPS silane, VN3 forms strong silica-polymer bonds that deliver significantly lower hysteresis and fuel economy benefits compared to carbon black-filled treads.

rubber tire chemicals

RFL Fiber Bonding Agent (Resorcinol-Formaldehyde-Latex)

RFL (Resorcinol-Formaldehyde-Latex) dip is the industry standard adhesive system for bonding textile tire cords (nylon, polyester, rayon, aramid) to rubber compounds. The dip consists of a resorcinol-formaldehyde resin precondensate dispersed in rubber latex (typically VP latex), which when applied to the cord and heat-cured, forms a strong interfacial bond between the cord and rubber matrix. RFL systems are critical to tire durability, ensuring the cord-rubber composite maintains integrity under dynamic flex conditions.

rubber tire chemicals

Rapeseed Oil (Bio-Based Rubber Extender)

Rapeseed oil is a bio-based, renewable process oil and extender used in rubber compounding as a sustainable alternative to mineral-based aromatic and naphthenic process oils. It provides good solvation of NR, SBR, and BR polymers, improves filler dispersion, and reduces compound viscosity. With growing demand for bio-content and eco-label tires, rapeseed oil is increasingly specified in green tire tread compounds to replace part of the mineral oil fraction.

rubber tire chemicals

Reclaim Rubber Activator (Devulcanizing Additive)

Reclaim Rubber Activator is a blend of devulcanizing agents, peptizers, and processing aids used in the reclaiming of waste tire rubber and industrial rubber scrap by the wet (pan) or dry (devulcanization) process. It cleaves polysulfide crosslinks in vulcanized rubber to restore plastic processability while retaining sufficient molecular weight for compounding with virgin rubber. The use of reclaim rubber activators enables cost-effective incorporation of recycled rubber content in new tire and rubber compounds.

rubber tire chemicals

Resorcinol (Rubber-to-Cord Bonding Agent)

CAS: 108-46-3

Resorcinol is used in rubber compounding as a methylene acceptor in combination with hexamethylene tetramine (HMT) or HMMM to form an in-situ resole resin within the rubber matrix, providing excellent adhesion between the rubber compound and textile or steel cord reinforcements. The resorcinol-HMT/HMMM system (RF system) is widely used in tire carcass, belt, and bead compounds to improve cord pull-out resistance and interfacial bonding strength.

rubber tire chemicals

Silane Coupling Agent Si69 (Bis-TESPD)

CAS: 40372-72-3

Silane Coupling Agent Si69 (bis[3-(triethoxysilylpropyl)]-tetrasulfide, Bis-TESPD) is the industry benchmark silane for silica-filled green tire tread compounds. It reacts with silanol groups on precipitated silica during mixing to reduce silica-silica interactions and covalently bonds the silica surface to the rubber polymer during vulcanization. Si69 significantly reduces rolling resistance and improves wet traction in silica-based tire treads while maintaining acceptable processing viscosity.

rubber tire chemicals

Silane Coupling Agent Si75 (Bis-TESPS)

CAS: 56706-10-6

Silane Coupling Agent Si75 (bis[3-(triethoxysilylpropyl)]-disulfide, Bis-TESPS) is a disulfide silane offering lower ethanol release and reduced premature vulcanization risk compared to the tetrasulfide Si69. Its shorter polysulfide chain provides a more predictable processing window and is preferred in compounds requiring tight scorch control and on continuously operating mixing lines. Si75 delivers comparable reinforcement and rolling resistance benefits to Si69 while improving processing safety.

rubber tire chemicals

Silicone Mold Release Agent for Rubber

CAS: 9006-65-9

Silicone-based mold release agents for rubber molding are used to prevent adhesion between cured rubber compounds and metal mold surfaces, enabling clean part ejection and extending mold life. They are available as solvent-based sprays, water-based emulsions, and semi-permanent coatings to suit different molding processes including compression, transfer, and injection molding. Silicone mold releases are compatible with a wide range of rubber types and cure systems including sulfur-cured and peroxide-cured compounds.

rubber tire chemicals

Silicone Rubber Cure Inhibitor (LSR/RTV-2)

Silicone cure inhibitors are used in platinum-catalyzed addition-cure silicone systems to extend pot life and working time at room temperature while maintaining fast cure at elevated temperatures. They function by temporarily complexing or deactivating the platinum catalyst below a threshold temperature. Common inhibitor types include ethynylcyclohexanol, diallyl maleate, and 2-methyl-3-butyn-2-ol, which are used at concentrations of 0.01–0.5% to tune working time from minutes to hours.

rubber tire chemicals

Stearic Acid (Rubber Grade)

CAS: 57-11-4

Stearic Acid rubber grade is a critical vulcanization activator used in combination with zinc oxide to form the zinc stearate complex that activates accelerated sulfur vulcanization. It also acts as an internal lubricant to improve processing, reduce compound viscosity, and aid dispersal of fillers and other compounding ingredients. Rubber-grade stearic acid is available in flake and bead forms.