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| Name | Exterior view | Chemical composition | Complex carrier | Characteristics |
|---|---|---|---|---|
| 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. |
| First MAC-1108 |  |
Chemical composition: Highly Efficient Comprehensive Promoter | Complex carrier: EPDM/SBR | Characteristics: Suitable for use as a general-purpose accelerator in NR, SBR, BR, IR, NBR, and other rubbers, it offers a relatively fast curing speed and excellent cure flatness. It can be used as the primary accelerator or combined with accelerators from the thiuram, guanidine, and aldehyde-amine families. This product is ideal for both light-colored and dark-colored rubber products, including items like footwear soles, balls, and hoses. |
| First MAC-3108 |  |
Chemical composition: Environmentally friendly, highly efficient promoter without a thiazole structure | Complex carrier: EPDM/SBR | Characteristics: A comprehensive eco-friendly accelerator suitable for NR, SBR, BR, EPDM, IIR, and other rubbers; it can be used as the primary accelerator on its own or combined with small amounts of TBzTD-75, ZBEC-75, ZDTP-50, and other components to create an environmentally friendly vulcanization system. This system delivers rapid curing speeds while completely eliminating the thiourea structure, ensuring a non-bitter taste. Importantly, no nitrosamine carcinogens are produced during the vulcanization process. During storage, the product may gradually change from pale yellow to gray, though it remains non-staining to rubber. |
| First ZBPD-50 |  |
Chemical composition: Zinc O,O-dibutyl dithiophosphate | Complex carrier: EPDM | Characteristics: A fast-acting vulcanization accelerator for NR and EPDM; it exhibits no blooming, disperses easily, and ensures stable product performance. Featuring a non-amine structure, it is commonly used in vulcanization systems designed to avoid nitrosamine formation, while also demonstrating excellent resistance to reduction. This product is frequently employed in light-colored, vibrant-colored, and white rubber products. Additionally, it can serve as a secondary accelerator in place of DPG, helping to reduce the toxicity of DPG in rubber compounds. When manufacturing articles intended for food contact, compliance with Class 4 regulations outlined in BgVV XXI is required; however, no specific FDA guidelines currently exist for food-contact applications. |
| First ZDTP-50 |  |
Chemical composition: Zinc dialkyldithiophosphate | Complex carrier: EPDM | Characteristics: As a rapid vulcanization accelerator for NR and EPDM, it features a non-amine structure, making it ideal for use in vulcanization systems that eliminate nitrosamine formation while maintaining excellent anti-reduction properties. In effective sulfur-based curing systems, the resulting vulcanizates exhibit outstanding heat resistance. Additionally, when incorporated into NR or EPDM compounds containing sulfur, zinc oxide, thiazole-based, and thiuram accelerators, this product serves as both a primary and co-accelerator, promoting high cross-linking levels and ensuring safe processing conditions. When used in the manufacture of articles intended for food contact applications, compliance with Class 4 regulations outlined in BgVV XXI is mandatory. However, no specific guidelines currently exist regarding its use in FDA-approved food-contact applications. |
| First CDD-80 |  |
Chemical composition: Copper dimethyldithiocarbamate | Complex carrier: EPDM | Characteristics: Rapid vulcanization accelerators for NR, SBR, NBR, IIR, and EPDM systems—particularly well-suited for SBR, IIR, and EPDM formulations. These accelerators enhance vulcanization efficiency more effectively than TT or PX, but they are prone to scorching. To improve the safety of rubber compounds, thiazole- and sulfonamide-based accelerators are commonly used. Notably, in thiazole-based accelerator systems—whether used alone or as co-accelerators—this product requires the lowest dosage. Additionally, this compound exhibits slight rubber staining properties. |
| First TDEC-75 |  |
Chemical composition: Diethyl dithiocarbamate telluride | Complex carrier: EPDM | Characteristics: Used as an ultrafast vulcanization accelerator for rubbers such as NR, SBR, NBR, EPDM, and IIR; commonly employed as a co-accelerator with thiazole, thiuram, and dithiocarbamate-based accelerators. For IIR or EPDM compounds that vulcanize relatively slowly, as well as low-hardness formulations containing high levels of softening oils, it significantly reduces curing time and enhances cross-link density. Non-toxic, slightly odorous, easily dispersible, simple to weigh, and characterized by minimal processing loss. Particularly well-suited for continuous vulcanization, resulting in products with excellent rigidity. |
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