In modern elastomer compounding and high-volume rubber manufacturing, achieving reliable processing safety alongside rapid, complete vulcanization is essential. Rubber Accelerator CBS (widely known globally as CZ) stands as the most versatile delayed-action sulfenamide primary accelerator in the rubber industry. Chemically identified as N-Cyclohexyl-2-benzothiazolesulfenamide (CAS No. 95-33-0), CBS provides a clean induction period during high-shear mixing and extrusion, followed by a fast, vigorous cross-linking curve once curing temperatures above 138°C are reached. Because its cyclohexylamine structure does not produce regulated carcinogenic nitrosamines, CBS is an internationally trusted workhorse for Natural Rubber (NR) and synthetic elastomer formulations.
Technical Product Specifications
| Property / Parameter | Standard Specification |
|---|---|
| Chemical Name | N-Cyclohexyl-2-benzothiazolesulfenamide (CBS / CZ) |
| CAS Number | 95-33-0 |
| Molecular Formula | C13H16N2S2 |
| Appearance | Off-white to light grey-white powder / oiled powder / dust-free granules |
| Initial Melting Point (°C) | ≥ 98.0 °C (First Grade) / ≥ 96.0 °C (Qualified Grade) |
| Loss on Drying (%) | ≤ 0.30% |
| Ash Content (%) | ≤ 0.30% |
| Methanol Insolubles (%) | ≤ 0.50% |
Why Choose Our CBS (CZ) Accelerator?
- ✓ Balanced Scorch Safety & Rapid Cure: Offers an ideal induction delay during internal Banbury mixing, milling, and extrusion, followed by rapid cross-linking at standard vulcanization temperatures to maximize press productivity.
- ✓ High Tensile Modulus & Dynamic Resilience: Imparts superior tensile strength, high elasticity, low compression set, and strong abrasion resistance in both carbon-black and silica-reinforced rubber compounds.
- ✓ Clean Non-Nitrosamine & Non-Staining Profile: Does not generate regulated volatile nitrosamines during curing and causes minimal discoloration, making it suitable for both black industrial parts and light-colored molded goods.
Primary Applications
Accelerator CBS (CZ) is universally compatible with Natural Rubber (NR), Styrene-Butadiene Rubber (SBR), Polybutadiene Rubber (BR), Isoprene Rubber (IR), and Nitrile Rubber (NBR) compounds:
Automotive & Commercial Tires
Widely formulated into passenger and truck tire treads, sidewalls, carcass plies, and retread compounds where high abrasion resistance and fast cycle times are vital.
Conveyor Belts, Hoses & Cables
An industry standard for heavy-duty conveyor belting, automotive V-belts, hydraulic hoses, and flexible rubber cable jacketing requiring smooth extrusion.
Footwear & Molded Industrial Goods
Extensively used in high-wear rubber footwear outsoles, anti-vibration engine mounts, gaskets, seals, and precision injection-molded elastomer components.
Quality Assurance & Global Compliance
As a leading global partner in industrial chemical manufacturing, we understand that raw material purity, molecular consistency, and strict regulatory tracking directly safeguard your production line metrics. Our advanced manufacturing facilities maintain rigorous quality configurations to ensure total compliance and confidence across all international markets:
- Advanced Laboratory Quality Control: Every commercial batch of our Accelerator CBS (CZ) passes through extensive laboratory verification protocols—including capillary melting point profiling, high-performance liquid chromatography (HPLC) for active assay validation, and methanol insoluble screening—ensuring consistent cure kinetics and zero batch-to-batch variance in your mixing room.
- Comprehensive International Regulatory Compliance: We maintain a highly proactive approach to global chemical governance. All export shipments are systematically backed by complete regulatory documentation, including up-to-date, comprehensive multilingual GHS Safety Data Sheets (SDS), detailed Certificates of Analysis (CoA), and official tracking credentials fully matching EU REACH and US TSCA parameters.
- Optimized Packaging & Workspace Safety: To lower material handling loss and eliminate airborne chemical dust cross-contamination on your factory floor, we offer tailored logistics configurations. This includes standard multi-wall moisture-resistant kraft paper bags (25kg) lined with protective PE film, bulk jumbo supersacks (FIBCs), and dust-free oiled granule grades suited for automated dosing systems.
⚠ Storage & Handling Guidelines
Maintaining correct climate-controlled conditions is essential to protect the molecular performance stability of Accelerator CBS. Because sulfenamide compounds are sensitive to prolonged heat and ambient moisture, improper storage can induce gradual hydrolysis, lowering the melting point and diminishing scorch delay times.
- • Temperature & Humidity Controls: Store the chemical inside a completely dry, cool, and well-ventilated dedicated warehouse where ambient temperatures remain below 35°C. Keep storage racks isolated from direct solar radiation, steam pipes, heating vents, and acidic raw materials.
- • Sealing & Stacking Management: Keep all bags tightly tied and undamaged until immediate compounding use. Avoid excessive pallet double-stacking to prevent physical caking or lumping during warm summer months.
- • Shelf Life & Rotation: Under proper cool, shaded warehouse conditions, our premium CBS (CZ) exhibits a certified shelf life of 12 months from the date of manufacture. A strict First-In, First-Out (FIFO) inventory rotation cycle is strongly recommended.
Frequently Asked Questions
How does CBS (CZ) differ from TBBS (NS) and NOBS (MBS)? +
Can CBS be paired with secondary accelerators to achieve ultra-fast curing? +
What physical forms of CBS (CZ) are available for automated weighing lines? +
What is the typical recommended dosage range for CBS in rubber compounds? +
Partner with a Reliable Chemical Supplier
We provide premium-grade Rubber Accelerator CBS (CZ) carefully processed to meet international technical benchmarks. Available in high-purity crystalline powder and custom dust-free granule configurations to ensure absolute batch precision inside your industrial mixing environment.
