Tert-Butyl Peroxybenzoate TBPB tert-Butyl peroxybenzoate CAS 614-45-9
- CAS: 614-45-9
- Synonyms: tert-Butyl peroxybenzoate
- Abbreviation: TBPB
- EINECS No.: 210-382-2
- Molecular Formula: C₁₁H₁₄O₃
- Grade: Industrial Grade I (≥ 98%, ≥ 97%) / Industrial Grade II (≥ 75%, ≥ 50%)
- Packaging: 20 kg / 25 kg PE drum
Tree Chem manufactures Tert-Butyl Peroxybenzoate (TBPB, CAS 614-45-9) for customers looking to purchase or use high-quality organic peroxides in polymerization and resin curing applications.
The product is supplied in several industrial grades to accommodate different formulation needs, offering stable oxygen content and controlled decomposition properties.
As a widely used initiator and crosslinking agent, TBPB features good solubility, consistent reactivity, and compatibility with multiple resin systems including polyester, silicone, and EVA. Its reliable performance and safe handling characteristics make it suitable for both high-performance polymerization and large-scale industrial processes. For further information or quotation, please contact info@cntreechem.com.
Specification
Basic Information
| Parameter | Value |
| CAS Number | 614-45-9 |
| Synonyms | tert-Butyl peroxybenzoate |
| Abbreviation | TBPB |
| EINECS No. | 210-382-2 |
| Molecular Formula | C₁₁H₁₄O₃ |
| Grade | Industrial Grade I (≥ 98%, ≥ 97%) / Industrial Grade II (≥ 75%, ≥ 50%) |
| Packaging | 20 kg / 25 kg PE drum |
Technical Specification
| Item | Industrial Grade I (≥ 98%) | Industrial Grade I (≥ 97%) | Industrial Grade II (≥ 75%) | Industrial Grade II (≥ 50%) |
| Appearance | Colorless to pale yellow liquid | Colorless to pale yellow liquid | Colorless to pale yellow liquid | Colorless to pale yellow liquid |
| Assay (%) | ≥ 98 | ≥ 97 | ≥ 75 | ≥ 50 |
| Active Oxygen Content (%) | ≥ 8 | ≥ 8 | ≥ 6 | ≥ 4 |
| TBHP Content (%) | ≥ 0.1 | ≥ 0.1 | ≥ 0.1 | ≥ 0.1 |
| Density (25 °C) (g/cm³) | 1.036 – 1.045 | 1.036 – 1.045 | 1.036 – 1.045 | 1.036 – 1.045 |
| Refractive Index (nᴰ 25 °C) | 1.495 – 1.505 | 1.495 – 1.505 | 1.495 – 1.505 | 1.495 – 1.505 |
| Melting Point (°C) | −8 | −8 | −8 | −8 |
| Boiling Point (°C) | 112 | 112 | 112 | 112 |
Tree Chem Tert-Butyl Peroxybenzoate (TBPB) has been approved and listed by multiple international chemical regulatory authorities, demonstrating its global compliance and consistent product quality.
Our product is registered or recognized under the following inventories: Australia (AICS), Canada (DSL), European Union (EINECS), China (IECSC), Japan (ENCS), New Zealand (NZIoC), Korea (ECL), United States (TSCA), and the Philippines (PICCS).
These certifications confirm that Tree Chem Tert-Butyl Peroxybenzoate (TBPB) meets comprehensive international standards for safety, environmental protection, and industrial application quality, ensuring reliability and compliance across global markets.
Applications
Polymer and Plastics Industry
- Tert-Butyl Peroxybenzoate (TBPB) is a key organic peroxide initiator widely applied in polymer manufacturing. It decomposes to generate free radicals that initiate polymerization in monomers such as ethylene, propylene, styrene, and acrylates. In polyethylene production, TBPB ensures stable radical release within 100–130°C, resulting in polymers with higher transparency and improved dielectric strength.
- In polypropylene modification, TBPB facilitates controlled chain scission to increase melt strength and processability, particularly for high-melt-strength PP used in automotive and packaging industries. In styrenic polymers such as PS and ABS, it offers clean decomposition without aromatic byproducts, aligning with environmental compliance standards and improving product appearance and stability.
Rubber Industry
- TBPB acts as a crosslinking and vulcanization agent for high-performance rubbers including silicone rubber, EPDM, NBR, and HNBR.
- In silicone rubber, TBPB achieves crosslinking efficiencies above 92–95%, enhancing tensile strength from 2 MPa to 12–15 MPa and maintaining elasticity and heat resistance. It is widely used in high-temperature vulcanized (HTV) and liquid silicone rubber (LSR) applications.
- For EPDM and specialty rubbers, TBPB ensures fast curing, excellent weather resistance, and high thermal stability—essential for automotive seals, radiator hoses, and electronic components. Compared with dicumyl peroxide (DCP), TBPB enables lower vulcanization temperatures (by about 25 °C) and cleaner odor profiles, improving workplace safety and product quality.
Coatings and Adhesives
- In the coatings and composites industries, TBPB functions as a thermal curing initiator for unsaturated polyester resins (UPR) and vinyl ester systems. It supports efficient curing in SMC, BMC, and DMC molding processes, completing polymerization at 120 °C within 20 minutes—faster and cleaner than BPO-based systems.
- TBPB reduces yellowing (ΔYI < 2) and volatile emissions (VOC < 50 ppm), making it ideal for low-VOC coatings and environmentally compliant adhesives. In powder coatings, it enables lower baking temperatures (160 °C vs 200 °C) and improves flow and surface appearance.
New Energy and Electronic Materials
- TBPB is increasingly used in new energy applications. In the photovoltaic sector, it is essential for crosslinking EVA encapsulant films used in solar panels, ensuring high transparency and weather resistance. Each gigawatt of installed solar capacity consumes about 13.5 tons of TBPB, reflecting the product’s crucial role in energy materials.
- In electric vehicles, TBPB supports the production of crosslinked polyethylene (XLPE) for high-performance cable insulation, enhancing thermal and mechanical strength. In semiconductors and packaging materials, high-purity electronic-grade TBPB (≥ 99.99%) ensures low ion contamination and stable curing for encapsulation compounds.
- These advanced applications, including photolithography and composite insulators, are driving strong demand growth for TBPB in the electronics supply chain.
Environmental and Advanced Applications
- The chemical’s low migration, clean decomposition, and non-aromatic byproducts make it suitable for eco-friendly polymer processes. It is used in biopolymer modification, chemical recycling of plastics, and green oxidation systems.
- Emerging technologies integrate TBPB into microchannel reactors and continuous flow production, which significantly improve yield, reduce waste, and enhance operational safety. As industries transition toward greener manufacturing, TBPB’s compatibility with bio-based and recyclable materials positions it as a next-generation initiator for sustainable chemistry.
Storage & Handling
- Store in cool, dry, and well-ventilated areas away from heat and direct sunlight.
- Keep containers tightly sealed to avoid contamination.
- Avoid contact with acids, alkalis, reducing agents, or heavy metal ions.
- Use explosion-proof, anti-static equipment during operation.
- Recommended storage temperature: below 30 °C.
Usage Notice
- Handle gently; avoid shock, friction, or exposure to heat.
- Do not mix with accelerators or other peroxides before use.
- Use protective gloves, goggles, and clothing during handling.
- Rinse with plenty of water in case of accidental spillage.
- Dispose of residues according to hazardous-chemical regulations.
- Polyethylene polymerization system: TBPB 1%, ethylene 99%; TBPB decomposes to generate radicals that initiate polymerization under 120 °C.
- Polypropylene modification process: TBPB 0.5%, PP 99.5%; TBPB improves melt strength and processing stability.
- Silicone rubber curing compound: TBPB 0.3–0.5%, silicone 99.5%; TBPB initiates crosslinking, increasing tensile strength and elasticity.
- EPDM vulcanization system: TBPB 1%, EPDM 99%; TBPB accelerates curing, enhancing thermal and weather resistance.
- Unsaturated polyester resin molding: TBPB 2%, cobalt accelerator 0.1%, UPR 97.9%; TBPB enables complete curing within 20 minutes at 120 °C.
- EVA encapsulant crosslinking: TBPB 0.4%, EVA 99.6%; TBPB ensures film transparency and high-temperature durability for photovoltaic modules.
- Powder coating formulation: TBPB 0.5%, epoxy–polyester 99.5%; TBPB lowers curing temperature and minimizes yellowing.
Packaging
- 20 kg PE drum
- 25 kg PE drum
- Custom packaging available upon request
