In many rubber manufacturing processes, compounds must undergo mixing, extrusion, calendering, or shaping before curing begins. Delayed action accelerators are used to provide adequate processing safety by preventing premature vulcanization while still enabling rapid curing at higher temperatures.
Accelerators such as CBS and TBBS are widely recognized delayed-action accelerators. They offer good scorch safety during processing and fast cure rates once vulcanization temperature is reached. These characteristics make them suitable for tyre treads, sidewalls, hoses, belts, and various molded rubber products.
Proper use of delayed action accelerators helps reduce processing defects, minimize scrap generation, and improve consistency between production batches. Supporting chemicals such as PVI further enhance scorch safety, while Zinc Oxide activates the curing system. Antioxidants like TMQ and TDQ improve long-term ageing resistance. Consistent-quality delayed action accelerators support stable processing and predictable curing performance.
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