Bis-(3-Triethoxysilane Propyl)-Disulfide combined with carbon black creates a specialty mixture used throughout industrial rubber production. This blend involves pairing a coupling agent, known for its silane functional groups and a disulfide bridge, with fine carbon particles recognized for giving strength and color to the base polymer. The result often looks like a dense, granular powder—sometimes a fine dust, sometimes near-black flakes, sometimes pressed pearls. Each form holds unique handling quirks, but all bring chemical and physical reinforcement.
The molecular formula of the key silane part is C18H42O6S2Si2. At a glance, the triethoxysilane ends let the molecule bond tightly to siliceous and inorganic fillers, connecting any carbon black evenly throughout the mix. The central disulfide bridge links two propyl chains, turning this into a robust, reactive linker. Molecular weight lands near 474.8 g/mol. This solid backbone supports tire treads, conveyor belts, gaskets, and hoses by making raw rubber harder, tougher, and more durable.
Suppliers often offer Bis-(3-Triethoxysilane Propyl)-Disulfide and carbon black blends in forms matched to how a buyer wants to load powders—chunky flakes, free-flowing beads, or ultra-fine powder. All forms will have a dark black or charcoal hue, thanks to the carbon black. Bulk density sits between 0.4 g/cm³ and 0.7 g/cm³, guided by whether the product is powdered or pressed. Texture runs from soft and almost slippery to a gritty sand-like grain, and the material feels heavy in the hand relative to fluffier organic powders. No one’s breathing this in without a mask; the finest dust can hang in the air or coat equipment, but heavier granules drop fast with little airborne risk.
Specific gravity—useful for anyone looking to blend, meter, or ship this material—typically measures about 1.1 to 1.2 (water baseline 1.0). In real-world terms, if you try to stir Bis-(3-Triethoxysilane Propyl)-Disulfide and carbon black into a solvent, expect minimal solubility in water. What dissolves best sits in low-polarity solvents like toluene or n-hexane; even then, the carbon black lingers as a suspended phase, not a true solution. This matters for anyone looking to wash, process, or recycle the mix.
Rubber and tire makers rely on Bis-(3-Triethoxysilane Propyl)-Disulfide blends to solve real headaches. This product helps carbon particles stick tightly inside the polymer structure, not just float free. Strong silane chemical bonds give finished parts extra tear-resistance, keep the rubber from breaking down under constant flex, and improve how tires grab the road in wet and cold. Thanks to this mix, truck tires run more miles, automotive seals last through more cycles, conveyor belts stand up to hot and oily loads without cracking. Improved abrasion resistance, chemical durability, and aging performance all trace back to the strength of the silane bridge.
No serious blending happens without precise specs. Pulp, tire, and plastic plants check for bis-silane content (above 90% in pure form), particle size distribution (between 0.1–1.0 mm by sieve), and carbon black structure. Moisture content stays low—under 1%—since both the silane and carbon hate water in their raw state. Buyers usually demand packing in sealed drums, fiber kegs, or bulk bags lined with vapor barriers. Labels specify batch numbers, net weights (often 20–25 kg sacks or 500–1000 kg big-bags), and traceability information like manufacturing date or HS code. For this mixture, the customs code (HS Code) 2930909099 picks up most international shipments.
Mixing silane with carbon black carries real shop-floor risks. Carbon black itself leaves black dust on anything it touches and can cause respiratory issues with long-term exposure, drying out skin or creating itchiness where it lands. The bis-silane portion, when inhaled or in direct skin contact, produces an irritating, sharp odor and stings eyes and mucous membranes. Proper PPE training means gloves, long sleeves, and professional-grade dust respirators. Spills and cleanup need careful, no-water methods, as both silane and carbon black react with strong oxidizers and acids. Storage stays locked, cool, and dry, away from the weather or sources of ignition—bis-disulfide burns with acrid, sulfur-laden smoke if mishandled. Transport rules classify this material as non-flammable but hazardous; keep transport documents and MSDS accessible.
Bis-(3-Triethoxysilane Propyl)-Disulfide and carbon black pose persistence issues if dumped. Neither breaks down fast in the environment. Carbon black floats into air or washes into drains, looking minor at first but complicating air filters and water quality over years. Silane residues can tie up soil nutrients and knock down beneficial soil microbes if large spills linger. Routine clean-up and airtight storage prevent losses. Reclaiming scrap through rubber reprocessing—using heat, pressure, and controlled shearing—can recycle both the silane and carbon black portions back into new product safely, keeping long-lived materials from becoming unmanaged waste.
Factories pushing high fill rates for truck tires, industrial sheets, or flame-retardant rubber have new ways to temper health and safety risks. Automated powder conveying and closed system blending lock up most fugitive dust, with negative pressure hoods and HEPA filtration keeping fine carbon black out of the lungs and airways. Silane can run in pre-mixed, pre-weighed masterbatch pellets to cut hand transfer and dosing errors. Waste reduction comes by recirculating floor sweep, dust collector fines, and off-grade product. Substituting smaller batch sizes and daily in-process QC lets manufacturers detect off-spec batches before scale-up, saving cost and reducing rejected shipments. Education on proper use—right from the production line to shipping dock—prevents both environmental releases and workplace exposure, giving workers confidence in a safe, proven material.
