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| Name | Exterior view | Chemical composition | Complex carrier | Characteristics |
|---|---|---|---|---|
| First MAC-1489 |  |
Chemical composition: Highly Effective Anti-Yellowing Promoter | Complex carrier: EPDM | Characteristics: Outstanding yellowing resistance, achieving grades 4.0 to 5 under stable conditions with other ingredients in the formulation; exhibits a moderate vulcanization speed, resulting in wear resistance, tensile strength, and tear resistance that are comparable to those of standard accelerator-enhanced products. Additionally, it is free from contamination and discoloration, ensuring consistent color stability in rubber products—particularly making it ideal for use in rubber shoe soles. This product also boasts excellent scorch resistance when compounded into rubber, allowing it to remain stable at room temperature for 3–5 days, thus overcoming the common issue of short scorch times associated with conventional yellowing-resistant accelerators. It is primarily used in white and light-colored rubber shoe soles, as well as other rubber products. |
| First EM33-75 |  |
Chemical composition: EPDM Comprehensive Accelerator | Complex carrier: EPDM | Characteristics: A comprehensive accelerator specifically designed for EPDM, offering high vulcanization efficiency and excellent vulcanization flatness. It can be used alone or combined with ZDBC and ZDEC for even faster curing rates. This product is non-staining, does not cause discoloration, and disperses easily, making it ideal for white or light-colored rubber products. It is commonly employed in EPDM-based sealing strips, hoses, molded components, and other similar 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 MAC-2108 |  |
Chemical composition: Highly Efficient Comprehensive Promoter | Complex carrier: EPDM/SBR | Characteristics: Commonly known as Accelerator 2#, this product is a versatile accelerator suitable for NR, SBR, BR, IR, NBR, and other rubbers. It offers a moderate vulcanization rate with excellent flatness during the curing process. It can be used as the primary accelerator or combined with accelerators from the thiuram, guanidine, and aldehyde-amine families to further enhance the curing speed. This accelerator is ideal for both light-colored and dark-colored rubber products, such as footwear, balls, and hoses, and is particularly well-suited for thick-walled items as well as applications requiring extended scorch times. |
| First TCY-70 |  |
Chemical composition: Thiocyano-triazine | Complex carrier: EPDM/AEM | Characteristics: Widely used as a vulcanizing agent for acrylate and other chlorine-containing rubbers, as well as natural rubber and rubber-plastic blends (such as NBR/PVC) materials; it offers fast curing speeds, excellent scorch safety, and helps reduce overall vulcanization time—eliminating the need for secondary vulcanization. The resulting vulcanized rubber exhibits outstanding physical and mechanical properties, along with exceptional resistance to oil, heat, and compression set. Additionally, it enhances the aging resistance of diene-based rubber products and acts as an effective promoter for strong adhesion between polymers and metals. Notably, it also serves as a reliable inhibitor of copper-related damage. |
| First HMDC-75 |  |
Chemical composition: Hexamethylene diamine carbamate | Complex carrier: EPDM/AEM | Characteristics: Primarily used as a vulcanizing agent for fluororubber, ethylene acrylic rubber, and polyurethane adhesives, it also serves as a modifier for synthetic rubbers and an active vulcanizing agent for natural rubber, butyl rubber, isoprene rubber, and styrene-butadiene rubber. After application, it helps maintain the original vibrant color of rubber products. Additionally, it acts as a crosslinking agent for AEM (VAMAC), dispersing easily within AEM formulations and ensuring consistent product quality. The commonly used vulcanization system for AEM compounds involves combining HMDC with either DOTG or DPG. |
| First PDM-75 |  |
Chemical composition: N,N'-m-Phenylenebis(maleimide) | Complex carrier: EPDM | Characteristics: As a versatile rubber additive, it works synergistically with sulfur in natural rubber to prevent scorching and restore vulcanization. As an auxiliary curing agent, it also reduces the amount of peroxide required, significantly enhancing cross-linking efficiency and boosting heat resistance—making it ideal for high-temperature vulcanization systems. Additionally, it markedly decreases compression set while improving the scorch resistance of the compound. Furthermore, as a sulfur-free curing agent, it can be used in cable rubber formulations, effectively replacing all sulfur-containing curatives such as thiazoles and thiurams. This innovation resolves the longstanding issue of copper wires and copper electrical components turning black due to sulfur contamination caused by contact with conventional sulfur-based vulcanizing agents. |
| First DTDC-80 |  |
Chemical composition: Dicyclopentyl disulfide | Complex carrier: EPDM | Characteristics: Eco-friendly vulcanizing agents for NR, SBR, NBR and other rubbers—these agents provide an equal replacement for DTDM, are nitrosamine-free, easily disperse in compounded rubber, exhibit no blooming or scorching risks, and ensure safe processing. They also accelerate the vulcanization process while delivering vulcanized rubber with outstanding mechanical properties, excellent heat resistance, superior aging durability, and minimal compression set. Ideal for manufacturing large-scale rubber products such as wires, cables, heat-resistant items, thick-section components, medical embolization devices, and even tires, these agents are particularly well-suited for producing heat-resistant, sanitary, and colored rubber products. |
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