Description

Rubber Accelerator MBT & MBTS: High-Performance Vulcanization Boosters

MBT (Mercaptobenzothiazole) and MBTS (Dibenzoyl Thiuram Disulfide) are widely used, highly effective rubber accelerators known for their versatility and performance in various rubber applications. They are crucial components in the vulcanization process, significantly impacting the speed, efficiency, and quality of the final rubber product. This description details the properties and applications of both accelerators.

MBT (Mercaptobenzothiazole):

• Description: MBT is a primary accelerator, meaning it's capable of initiating vulcanization on its own. It's a white to pale yellow crystalline powder with a characteristic odor. It offers a good balance of scorch safety (resistance to premature curing) and cure rate.
• Key Properties:
  • Excellent scorch safety: Prevents premature vulcanization during processing, allowing for more processing time and flexibility.
  • Moderate cure rate: Provides a balance between processing speed and final product properties.
  • Good aging properties: Contributes to improved durability and resistance to degradation over time.
  • Cost-effective: Offers a favorable price-performance ratio.
  • Wide compatibility: Suitable for use with various rubber types, including natural rubber (NR), styrene-butadiene rubber (SBR), and butyl rubber (IIR).
• Applications: MBT is frequently used in applications requiring good aging resistance and moderate cure speed, including:
  • Tires & tire components
  • Hoses & belts
  • Rubber seals & gaskets
  • Footwear

MBTS (Dibenzoyl Thiuram Disulfide):

• Description: MBTS is a secondary accelerator, meaning it's most effective when used in conjunction with a primary accelerator like MBT. It's a light yellow to yellowish-brown powder with a distinctive odor. It's known for its rapid cure rate and ability to improve the physical properties of vulcanizates.
• Key Properties:
  • Fast cure rate: Significantly accelerates the vulcanization process, reducing processing time.
  • Improved tensile strength: Contributes to increased strength and durability of the cured rubber.
  • Enhanced modulus: Improves the stiffness and rigidity of the rubber product.
  • Good processing safety: While faster curing, it still offers adequate safety during processing.
  • Synergistic effects with MBT: When used in combination with MBT, it produces superior vulcanization characteristics.
• Applications: MBTS is often utilized in applications requiring fast curing and enhanced physical properties, such as:
  • Tires & tire components (particularly for faster production)
  • Automotive parts
  • Mechanical rubber goods

Combined Use of MBT & MBTS:

The combination of MBT and MBTS is a common practice in rubber compounding. MBT provides scorch safety and a balanced cure, while MBTS boosts the cure rate and improves the physical properties of the final product. This synergistic effect leads to optimized processing and superior performance characteristics.

Safety Precautions:

Both MBT and MBTS are chemical compounds and require handling with appropriate safety measures. Consult the relevant Safety Data Sheets (SDS) for detailed information on handling, storage, and personal protective equipment (PPE).

Note: The specific properties and performance of MBT and MBTS can vary depending on the type and quantity of other ingredients in the rubber compound, as well as the vulcanization conditions. It's crucial to conduct thorough testing and optimization to determine the optimal dosage and combination for specific applications.