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| Name | Exterior view | Chemical composition | Complex carrier | Characteristics |
|---|---|---|---|---|
| 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. |
| First DTDM-80 | |
Chemical composition: 4-4'-Dithiobis(morpholine) | Complex carrier: EPDM | Characteristics: It can be used as a vulcanizing agent for rubbers such as NR, SBR, NBR, and EPDM. At vulcanization temperatures, it releases active sulfur with an effective sulfur content of 21.6%, ensuring safe handling. When used alone, it results in a slower curing rate; however, combining it with thiazole, thiuram, or dithiocarbamate accelerates the vulcanization process. When incorporated into efficient or semi-efficient vulcanization systems, the resulting rubber exhibits excellent heat resistance and outstanding aging performance. Additionally, the compound demonstrates no frosting, minimal staining or discoloration, and easy dispersion and weighing during processing. |
| First IS90-80 |  |
Chemical composition: Insoluble sulfur | Complex carrier: EPDM/SBR | Characteristics: It serves as a vulcanizing agent for both natural and synthetic rubber; offering superior thermal stability, it helps prevent sulfur migration during processing and storage, while also reducing the tendency of accelerators (such as thiazoles) to cause "sulfur blooming." Additionally, it enhances the adhesion between the rubber compound and other reinforcing materials. This product is suitable for applications in tires, hoses, belts, footwear, and various industrial products. |
| First IS60-80 |  |
Chemical composition: Insoluble sulfur | Complex carrier: EPDM/SBR | Characteristics: It serves as a vulcanizing agent for both natural and synthetic rubber; offering superior thermal stability, it helps prevent sulfur migration during processing and storage, while also reducing the tendency of accelerators (such as thiazoles) to promote "sulfur blooming." Additionally, it enhances the adhesion between the rubber compound and other reinforcing materials. This product is suitable for applications in tires, hoses, belts, footwear, and various industrial products. |
| First S-80 |  |
Chemical composition: Sulfur | Complex carrier: EPDM/SBR | Characteristics: A versatile vulcanizing agent for both natural and synthetic rubber. It offers excellent dispersibility and ease of handling, making it particularly suitable for low-hardness rubbers. This agent ensures uniform distribution throughout the rubber matrix, effectively preventing localized over-vulcanization. It’s especially ideal for compounds requiring short mixing times. Applications include tires, hoses, belts, footwear, and a wide range of general industrial products. |
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