Tert-Butyl Peroxybenzoate
CAS Number: 614-45-9
Tert-butyl peroxybenzoate (TBPB) is a high-temperature organic peroxide initiator with a 10-hour half-life temperature of 104°C, suited for bulk and high-temperature suspension polymerization, as well as crosslinking of polyethylene and rubber compounds. It produces benzoyloxy and tert-butoxy radicals and is often used in combination with AIBN or BPO for two-stage cure profiles.
Technical Specifications
| appearance | Colorless to pale yellow transparent liquid |
| purity (%) | ≥98.0 |
| water content (%) | ≤0.1 |
| active oxygen content (%) | 8.0–8.3 |
| 10-hour half-life temperature (°C) | 104 |
Applications
- High-temperature bulk polymerization of styrene and MMA
- Crosslinking agent for XLPE wire and cable insulation
- Rubber vulcanization at elevated temperatures
- Co-initiator in two-stage cure systems for thick-section parts
- Grafting agent for maleic anhydride onto polyolefins
Key Features
- High decomposition temperature extends processing window for thick-section and bulk polymerization
- Dual radical type (benzoyloxy + tert-butoxy) improves grafting efficiency on polyolefins
- Liquid form allows precise dosing and easy blending with monomer streams
- Complementary half-life with BPO/AIBN enables tailored two-stage cure profiles
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CAS Number
614-45-9
Category
Polymer Synthesis ChemicalsAvailability
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