At A&D Polymers, our Specialty Rubber Accelerators—TMTD (Tetramethylthiuram Disulfide), CBS (N-Cyclohexyl-2-benzothiazole sulfenamide), ZDBC (Zinc Dibutyldithiocarbamate), and MBTS (Dibenzothiazole Disulfide)—are integral components for achieving efficient, high-quality vulcanization in rubber manufacturing. These accelerators are precisely engineered to meet the demanding performance requirements of industries such as automotive, construction, footwear, and general industrial rubber goods.

By carefully tailoring the vulcanization kinetics, our accelerators not only speed up production but also enhance the final mechanical and aging properties of rubber compounds. With a deep commitment to innovation, technical excellence, and customized solutions, A&D Polymers ensures that every batch delivers consistent quality and superior results.

Functional Properties of Specialty Rubber Accelerators

Each accelerator offers unique properties, allowing formulators to fine-tune their rubber compounds:

• TMTD: A fast primary accelerator for sulfur vulcanization, acting also as a sulfur donor. It offers quick cure rates and is widely used in NR, SBR, and other general-purpose rubbers.

• CBS: A delayed-action accelerator providing excellent scorch safety, outstanding modulus development, and high tensile strength. Ideal for thick articles and complex profiles.

• ZDBC: An ultra-fast accelerator especially useful in light-colored or non-staining rubber applications. It promotes excellent aging resistance and is used in specialty rubber compounds.

• MBTS: A semi-fast, versatile accelerator delivering balanced scorch safety and cure speed, suitable for a wide range of rubber goods.

Areas of Application

Our Specialty Rubber Accelerators are pivotal in multiple sectors, including:

• Automotive: Tires, belts, hoses, seals, and gaskets

• Construction: Expansion joints, membranes, and adhesives

• Footwear: Soles, heels, and specialty components

• Industrial Rubber Goods: Conveyor belts, molded goods, wire and cable insulation, vibration isolators

Key Benefits and Performance Enhancements of Specialty Rubber Accelerators

Choosing A&D Polymers’ Specialty Rubber Accelerators brings a range of advantages to rubber manufacturers:

• Optimized Vulcanization Efficiency: Tailored cure rates to fit diverse processing needs, from fast cure for high-throughput lines to delayed action for complex molding.

• Enhanced Mechanical Properties: Achieves higher tensile strength, elasticity, and tear resistance, ensuring longer service life of rubber goods.

• Improved Processing Safety: Accelerators like CBS and MBTS provide excellent scorch resistance, reducing the risk of premature vulcanization.

• Superior Aging and Heat Resistance: ZDBC offers excellent protection against degradation under thermal stress and aging environments.

• Customization Possibilities: A&D Polymers provides technical support to fine-tune formulations according to specific customer and application needs.

• Sustainability Focus: Formulations contribute to energy-efficient processing and longer-lasting end products, aligning with industry sustainability goals.

Technical Characteristics of Specialty Rubber Accelerators

Here’s a closer look at the technical features of each accelerator:

• TMTD:

  • Appearance: White/Off-white powder

  • Specific Gravity: ~1.29

  • Effective for sulfur-donor systems

  • Fast curing with slight scorch risk

• CBS:

  • Appearance: Off-white to pale yellow powder

  • Specific Gravity: ~1.31

  • Provides delayed action curing

  • Excellent for thick articles

• ZDBC:

  • Appearance: White powder

  • Specific Gravity: ~1.24

  • Ultra-accelerator with non-staining properties

  • Best for heat-resistant rubber products

• MBTS:

  • Appearance: Light yellow powder

  • Specific Gravity: ~1.45

  • Semi-fast accelerator with good processing safety

  • Compatible with a broad range of rubbers

All accelerators can be supplied in powder or granule form, and are available in customized particle size distributions to optimize mixing and dispersion in various rubber processing operations.

Partner with A&D Polymers to leverage our Specialty Rubber Accelerators portfolio for your next innovation. Our team provides end-to-end technical support to ensure your rubber products perform at their peak—today and into the future.