In high-speed elastomer compounding and modern tire manufacturing, achieving the ideal balance between processing safety and vulcanization efficiency is essential. Rubber Accelerator NOBS (widely known as MBS or MOR) serves as a high-performance, delayed-action sulfenamide accelerator. Chemically identified as N-Oxydiethylene-2-benzothiazolesulfenamide (CAS No. 102-77-2), NOBS provides a significantly longer induction period than standard CBS or MBT accelerators. This extended scorch delay allows complex, high-fill compounds to undergo high-shear mixing, extrusion, and calendering safely before initiating rapid, uniform cross-linking at curing temperatures.
Technical Product Specifications
| Property / Parameter | Standard Specification |
|---|---|
| Chemical Name | N-Oxydiethylene-2-benzothiazolesulfenamide (NOBS / MBS) |
| CAS Number | 102-77-2 |
| Molecular Formula | C11H12N2OS2 |
| Appearance | Light yellow or buff crystalline powder / dust-free granules |
| Initial Melting Point (°C) | ≥ 80.0 °C (First Grade) / ≥ 78.0 °C (Qualified Grade) |
| Loss on Drying (%) | ≤ 0.30% |
| Ash Content (%) | ≤ 0.30% |
| Free Amine Content (%) | ≤ 0.50% |
Why Choose Our NOBS (MBS) Accelerator?
- ✓ Superior Scorch Processing Safety: NOBS provides one of the longest scorch delay times among commercial sulfenamide accelerators, preventing premature vulcanization in high-temperature Banbury mixers and extruders.
- ✓ Rapid Cure & Broad Vulcanization Plateau: Once curing temperature is reached (typically above 140°C), it delivers a fast cross-linking velocity and a flat curing curve, ensuring uniform physical properties even in thick-walled rubber sections.
- ✓ Enhanced Dynamic & Adhesion Properties: Vulcanizates cured with NOBS exhibit high tensile modulus, low heat build-up, and strong interfacial adhesion to brass-plated steel cords and synthetic tire fabrics.
Primary Applications
Accelerator NOBS (MBS) is extensively utilized in Natural Rubber (NR), Styrene-Butadiene Rubber (SBR), Polybutadiene Rubber (BR), and Nitrile Rubber (NBR) formulations:
Radial & Heavy-Duty Tires
An essential component for high-fill furnace black tread stocks, carcass plies, sidewall compounds, and steel-belted radial tire skim coats.
Conveyor Belts & Industrial Hoses
Ideal for heavy-duty mining conveyor belts, power transmission V-belts, and high-pressure braided hoses requiring extended extrusion safety.
Molded Mechanical Goods
Widely selected for thick-section shock absorbers, anti-vibration engine mounts, and precision footwear soles where uniform cure depth is critical.
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 NOBS (MBS) passes through extensive laboratory verification protocols—including capillary melting point profiling, high-performance liquid chromatography (HPLC) for active assay verification, and free amine titration—ensuring absolute matrix uniformity and zero performance variance in your compounding plant.
- 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 weighing systems.
⚠ Storage & Handling Guidelines
Maintaining correct climate-controlled conditions is essential to protect the molecular performance stability of Accelerator NOBS. Because sulfenamide compounds are sensitive to heat and moisture, improper storage can trigger gradual hydrolysis, lowering the melting point and diminishing scorch delay performance.
- • Temperature & Humidity Controls: Store the product inside a completely dry, cool, and well-ventilated dedicated warehouse where ambient temperatures remain below 35°C. Keep storage racks isolated from direct sunlight, steam pipes, heating vents, and acidic materials.
- • Sealing & Stacking Management: Keep all bags tightly sealed and undamaged until immediate use. Avoid excessive pallet stacking height to prevent caking or compaction under high ambient summer temperatures.
- • Shelf Life & Rotation: Under proper cool, shaded warehouse conditions, our premium NOBS (MBS) 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 NOBS (MBS) compare to CBS (CZ) in terms of scorch safety and cure rate? +
Can NOBS be combined with secondary accelerators to boost curing speed? +
What physical forms of NOBS (MBS) do you supply for automated mixing rooms? +
What is the typical recommended dosage range for NOBS in tire compounds? +
Partner with a Reliable Chemical Supplier
We provide premium-grade Rubber Accelerator NOBS (MBS) carefully formulated 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.
