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| Name | Exterior view | Chemical composition | Complex carrier | Characteristics |
|---|---|---|---|---|
| First MTT-80 |  |
Chemical composition: 3-Methyl-2-thiazolethione | Complex carrier: EPDM/SBR | Characteristics: This product is an environmentally friendly accelerator based on a thiazole heterocyclic compound, containing active sulfur atoms that induce crosslinking in halogen-containing polymer materials. It is particularly well-suited for use in chlorinated butyl rubber and chloroprene rubber, serving as a highly effective accelerator specifically for chloroprene rubber. Compared to ETU, it retains the excellent physical properties and superior aging resistance characteristic of ETU-cured chloroprene rubber, while also enhancing scorch resistance and improving processing safety. Additionally, it offers a faster vulcanization rate without compromising overall performance. |
| First DBTU-75 |  |
Chemical composition: N,N'-Dibutylthiourea | Complex carrier: EPDM/SBR | Characteristics: This product is a fast-acting vulcanization accelerator specifically designed for chloroprene rubber, and it also enhances the curing process of natural rubber, styrene-butadiene rubber, butyl rubber, and ethylene-propylene-diene monomer (EPDM) rubber. DBTU exhibits performance comparable to ETU and DETU, making it ideal for rubber compounds cured at lower temperatures—resulting in products with superior physical properties. Additionally, DBTU provides moderate ozone resistance in various types of rubber, including natural rubber, chloroprene rubber, nitrile rubber, and styrene-butadiene rubber, making it suitable for use as an anti-ozonant additive. |
| First DPTU(CA)-75 |  |
Chemical composition: N-N'-Diphenylthiourea | Complex carrier: EPDM/SBR | Characteristics: Fast vulcanization accelerator for natural rubber and neoprene products; critical vulcanization temperature is 80°C—during mixing, care must be taken to prevent premature curing, as the product becomes highly active above 100°C. The resulting materials exhibit exceptional toughness, with excellent tensile strength and flex resistance, though they may undergo discoloration when exposed to light. It is also used as a heat stabilizer in emulsion polymerization of polyvinyl chloride, making it particularly suitable for soft PVC products. However, it should not be combined with stabilizers like lead or cadmium, as this could lead to discoloration of the final product. |
| First DETU-75 |  |
Chemical composition: Diethylthiourea | Complex carrier: EPDM/SBR | Characteristics: Chloroprene rubber exhibits unique vulcanization properties, resulting in products with minimal compression set and excellent aging resistance. In non-sulfur-modified chloroprene rubber vulcanization systems, it typically delivers superior curing performance when used in combination with zinc oxide and magnesium oxide. Additionally, it serves as an effective accelerator for butyl rubber and a vulcanizing activator for EPDM rubber. It also provides antioxidant protection for NR, CR, NBR, and SBR. While it can be activated by accelerators like ZDC and salicylic acid, DM and TMTD tend to inhibit its activity. In NR and SBR, it effectively enhances the activation of thiazole- and sulfonamide-based accelerators. At higher dosages, it enables rapid, high-temperature vulcanization, making it particularly well-suited for the continuous production of extruded rubber products. |
| First ETU (NA-22)-75 |  |
Chemical composition: 1,2-Ethylenethiourea (Ethylene Thiourea) | Complex carrier: EPDM/SBR | Characteristics: A general-purpose accelerator for halogenated rubber products such as CR, CSM, and CPE. In non-sulfur-modified chloroprene rubber vulcanization systems, zinc oxide and magnesium oxide are typically used as vulcanizing agents, often combined with this product to achieve superior curing performance. For low-sulfur or sulfur-free vulcanization of other diene rubbers, it can serve as both an activator and a secondary accelerator. |
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