In high-end transparent rubber compounding, colorful technical moldings, and durable latex manufacturing, maintaining high-temperature aging protection without causing ugly dark staining is a critical engineering challenge. Rubber Antioxidant MB (universally recognized in global B2B procurement as MBI) operates as a highly effective heterocyclic secondary antioxidant. Chemically identified as 2-Mercatobenzimidazole (CAS No. 583-39-1), MB provides outstanding protection when used in combination with hindered phenols or amine antioxidants. By decomposing destructive hydroperoxides into completely stable compounds and deactivating hazardous heavy metal traces, MB preserves the physical network strength of Natural Rubber (NR) and synthetic elastomer chains under sustained heat stress.
Technical Product Specifications
| Property / Parameter | Standard Specification |
|---|---|
| Chemical Name | 2-Mercatobenzimidazole (MB / MBI) |
| CAS Number | 583-39-1 |
| Molecular Formula | C7H6N2S |
| Appearance | White to off-white or pale yellow powder / dust-free granules |
| Initial Melting Point (°C) | ≥ 290.0 °C |
| Loss on Drying (%) | ≤ 0.40% |
| Ash Content (%) | ≤ 0.30% |
| Sieve Residue (150 μm / 100 mesh) | ≤ 0.10% |
Why Choose Our MB (MBI) Antioxidant?
- ✓ True Non-Staining and Non-Discoloring Behavior: Does not cause yellowing or brown surface migration, completely preserving the clear aesthetics of light-colored, translucent, or pure white compounds.
- ✓ Powerful Secondary Anti-Hydroperoxide Synergy: Works hand-in-hand with primary antioxidants (such as Antioxidant SP or 2246) to produce a profound synergistic anti-thermal aging effect.
- ✓ Excellent Copper and Metal Ion Inhibition: Acts as an expert chemical deactivator to complex trace metallic poisons, preventing copper-catalyzed oxidation and curing degradation.
Primary Applications
Antioxidant MB (MBI) is highly integrated across Natural Rubber (NR), Styrene-Butadiene Rubber (SBR), Nitrile Rubber (NBR), and diverse aqueous latex matrices:
Transparent & Light-Colored Goods
Extensively selected for non-staining translucent athletic footwear soles, colorful household rubber articles, elastic threads, and bath mats.
Natural & Synthetic Latex Dipping
An ideal protective secondary stabilizer for dipped surgical gloves, premium catheters, balloons, baby bottle nipples, and carpet latex backings.
Heat-Resistant Wire & Cable Insulation
Selected for continuous vulcanization cable sheathing jackets, electrical appliance cords, and high-heat automotive wire lines.
⚠ Storage & Handling Guidelines
Maintaining correct warehouse climate parameters is vital to safeguard the premium color stability and active anti-aging potency of Antioxidant MB (MBI). Although it possesses a very high initial melting point (≥ 290.0 °C), prolonged exposure to atmospheric moisture or open oxygen cycles can induce slow powder agglomeration and mild color drift.
- • Warehouse Climate Control: Store the chemical bags within fully dry, cool, and shade-covered dedicated warehouse bays. Keep the warehouse footprint completely isolated from moisture tracks, direct solar exposure, dynamic steam lines, or heat vents.
- • Sealing & Stacking Management: Keep all bags or boxes tightly sealed and uncompromised until the material is immediately weighed. Avoid ultra-high pallet configuration stacking to eliminate the risk of logical moisture-caking.
- • Shelf Life Strategy: Under clean, temperature-controlled sealed environments, our industrial MB products possess a certified shelf life of 24 months from the manufacturing date. Emphasizing a continuous First-In, First-Out (FIFO) material control framework is advised.
Frequently Asked Questions
Why is Antioxidant MB (MBI) classified as a secondary antioxidant? +
Does Antioxidant MB affect the scorch time or cure velocity of accelerators? +
What physical forms of Antioxidant MB do you supply to prevent mill contamination? +
What is the standard recommended dosage range for Antioxidant MB? +
Partner with a Reliable Chemical Supplier
We provide premium-grade Rubber Antioxidant MB (MBI) carefully processed to meet international technical benchmarks. Available in high-purity crystalline powders and oiled configurations to ensure absolute batch precision inside your industrial mixing environment.
