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| Name | Exterior view | Chemical composition | Complex carrier | Characteristics |
|---|---|---|---|---|
| First TBzTD-75 |  |
Chemical composition: Tetrabenzyl tetraurea | Complex carrier: EPDM | Characteristics: Fast-acting vulcanization accelerators and sulfur carriers in both natural and synthetic rubber are primarily used as a replacement for TMTD. During the vulcanization process, they do not generate or release carcinogenic nitrosamine compounds, thereby complying with Germany’s "Technical Rules for Hazardous Substances" TRGS 552 regarding nitrosamine toxicity. TBzTD-75GE offers a longer scorch time compared to TMTD-75GE. It is occasionally employed as a PVC rubber vulcanization inhibitor. Additionally, TBzTD-75 can serve as a delayed-action agent when used alongside ETU-75 in mercaptan-modulated chloroprene rubber compounds. |
| First TBSI-75 |  |
Chemical composition: N-tert-Butyl-bis(2-benzothiazolyl) sulfenimide | Complex carrier: EPDM/SBR | Characteristics: Natural rubber and synthetic rubber's post-curing, eco-friendly accelerators—particularly suited for carbon black compounds with high alkalinity—offer excellent scorch resistance, ensuring safe handling even at elevated temperatures. They also promote faster vulcanization while maintaining outstanding resistance to reduction. These accelerators can effectively replace the TBBS + PVI system in large-scale, thick natural rubber products. With their high molecular weight, elevated melting point, and superior thermal stability, they remain stable even when exposed to water. Additionally, they enhance the heat resistance and durability of steel cord-to-rubber adhesion, making them an ideal choice for demanding applications. |
| First TBBS(NS)-80 |  |
Chemical composition: N-tert-Butyl-2-benzothiazole sulfonamide | Complex carrier: EPDM/SBR | Characteristics: Post-effect accelerators for natural rubber, synthetic rubber, and reclaimed rubber—particularly well-suited for carbon black compounds with high alkalinity. They ensure safety at processing temperatures, exhibit excellent scorch resistance, promote rapid vulcanization, deliver high tensile strength, and allow for increased incorporation of synthetic rubber. Importantly, these accelerators do not generate nitrosamines, the carcinogenic byproducts typically associated with vulcanization, making them an ideal NOBS replacement while also offering outstanding overall performance—they’re often referred to as the "standard accelerator." Additionally, they can be used in combination with thiazole, guanidine, and aldehyde-amine accelerators to enhance activity, and when paired with the scorch inhibitor PVI, they form a highly effective vulcanization system. |
| First MBTS(DM)-75 |  |
Chemical composition: Dibenzothiazole dithide | Complex carrier: EPDM/SBR | Characteristics: A general-purpose accelerator for natural rubber, synthetic rubber, and reclaimed rubber—offers excellent flatness, moderate vulcanization speed, a relatively high critical vulcanization temperature, significant post-cure effects, prevents premature curing, and ensures safe handling. |
| First MBT(M)-75 |  |
Chemical composition: 2-Thiobenzothiazole | Complex carrier: EPDM/SBR | Characteristics: A general-purpose accelerator for both natural and synthetic rubber. It offers rapid vulcanization rates, requires low vulcanization temperatures (as low as 125°C), and provides a wide vulcanization plateau. Used in sulfur-free or low-sulfur systems, as well as in chloroprene rubber, it functions effectively as an anti-scorch agent and a vulcanization retarder. Additionally, it helps plasticize and soften raw rubber. |
| First CaO-80 |  |
Chemical composition: Calcium oxide | Complex carrier: EPDM/EVM | Characteristics: Applied to both natural and synthetic rubber; effectively absorbs moisture within the compound, eliminating surface defects caused by water; enhances bubble uniformity in foamed products, significantly reducing defect rates; suitable for use in atmospheric continuous vulcanization systems, such as salt bath, microwave, or hot-air curing processes. |
| FST Si69-50E |  |
Chemical composition: Bis-(triethoxypropyl) tetrasulfide | Complex carrier: EPDM/SBR | Characteristics: Multifunctional silane coupling agents for natural and synthetic rubber. These agents enhance the reinforcing properties of fillers, including white carbon black and light-colored fillers, improve compatibility between fillers and rubber, and boost the degree of rubber crosslinking, resulting in higher elastic modulus and tensile strength. They also significantly improve the abrasion resistance and compression set performance of rubber while reducing both rubber viscosity and energy consumption. Additionally, they prevent scorching during vulcanization, ensuring that rubber products exhibit excellent heat aging resistance. |
| First CTP-80 |  |
Chemical composition: N-Cyclohexylthiophthalimide | Complex carrier: EPDM/SBR | Characteristics: It is a high temperature effective anti-scorch agent suitable for natural rubber, synthetic rubber and rubber with multiple vulcanization promotion systems (especially EPDM); it can effectively prevent the rubber compound from scorching ahead of time during processing and storage, and can greatly improve the safety of operation; compared with CTP, E/Chas better anti-scorch effect at high temperature, less dosage and lower odor, and does not produce nitrosamines during vulcanization. It is especially suitable for rapid vulcanization at high temperature. |
| FST-801/802/803 Black |  |
Chemical composition: Black | Complex carrier: SBR | Characteristics: Characterized by high concentration, non-migratory properties, no blue light emission, and exceptional color intensity. |
| FST-307 Black |  |
Chemical composition: Black | Complex carrier: SBR | Characteristics: Non-migrating, non-blue-light-emitting, highly tinting, cost-effective black masterbatch. |
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