Tert-Butyl Peroxybenzoate (TBPB): Effective Curing Agent for High-Temperature Molding Applications

Product Overview:

Tert-Butyl Peroxybenzoate (TBPB) is a highly efficient organic peroxide primarily used for curing unsaturated polyester resins in high-temperature molding processes such as Sheet Molding Compound (SMC), Bulk Molding Compound (BMC), and pultrusion. Known for its reliability and superior performance, TBPB is the preferred choice for manufacturers aiming for optimal curing in demanding industrial applications.

Applications:

TBPB is widely utilized in hot press molding techniques like SMC, BMC, and pultrusion. Its effective curing properties make it suitable for producing a variety of products, including automotive components, electrical housings, and construction materials. The high reactivity of TBPB ensures thorough polymerization, resulting in durable and robust end products.

Key Specifications:

Chemical Name: Tert-Butyl Peroxybenzoate
CAS Number: 614-45-9
TSCA Status: Listed on inventory
Physical Characteristics:

Appearance: Clear, colorless liquid
Active Oxygen Content: 8.24%
Density at 20°C: 1.043 g/cm³
Flashpoint: 96°C
Refractive Index: 1.499
Boiling Point: 124°C
Melting Point: 8°C

Thermal Stability:

As with other organic peroxides, TBPB is thermally unstable and can undergo self-accelerating decomposition. The Self-Accelerating Decomposition Temperature (SADT) is a critical parameter, determined using the Heat Accumulation Storage Test, which adheres to the Recommendations on the Transport of Dangerous Goods by the United Nations.

Self-Accelerating Decomposition

Temperature (SADT): 63°C
UN Number: 3103
China Dangerous Chemical Number (CN-No): 52076
Decomposition Temperature: 60°C

Solubility

Soluble in alcohols, esters, ethers, and hydrocarbon solvents
Insoluble in water

Packaging and Storage

TBPB is available in 20 kg and 25 kg PE drums. It should be stored in a cool, well-ventilated area at temperatures between 10-30°C. For customers with stringent color requirements, storage at 10-15°C is recommended to maintain quality.

Standard Packaging

20 kg, 25 kg PE drumsStorage Temperature: 10-30°C
Optimal Storage for Color: 10-15°C
Quality Specifications:

Appearance

Light yellow, transparent oily liquid
Content: Minimum 98.5%
Color: Maximum 100 Hazen units
Half-Life Data:

Activation Energy

33 kcal/mole
10-Hour Half-Life Temperature: 105°C
1-Hour Half-Life Temperature: 125°C
1-Minute Half-Life Temperature: 167°C

Safety and Handling:

Store and handle TBPB in a dry, well-ventilated area, away from heat sources, ignition, and direct sunlight. Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds. Refer to the Safety Data Sheet (SDS) available at nouryon.com/sds-search for comprehensive safety and handling instructions.