Product Overview
Tert-Butyl Peroxybenzoate (TBPB, CAS No. 614-45-9) is a high-temperature organic peroxide polymerization initiator. In EPS suspension polymerization, TBPB is commonly used as a secondary initiator and is often combined with BPO to provide staged radical generation across the polymerization cycle.
Tert-Butyl Peroxybenzoate Technical Specifications
Chemical Name: Tert-Butyl Peroxybenzoate
Abbreviation: TBPB
Commercial Name: ST-TBPB
| Property | Specification |
| Chemical Name | Tert-Butyl Peroxybenzoate |
| Abbreviation | TBPB |
| CAS Number | 614-45-9 |
| Appearance | Clear Light Yellow Liquid |
| Assay | ≥ 98.5% |
| Active Oxygen | 8.12% |
| Water Content | ≤ 0.20% |
| Acidity (as Benzoic Acid) | ≤ 0.05% |
TBPB in EPS Polymerization
TBPB functions as a high-temperature initiator in EPS suspension polymerization. It is commonly paired with BPO to extend radical generation into later stages of the polymerization cycle.
Applications of TBPB
EPS polymerization
LDPE production
Unsaturated polyester resin curing
Acrylic ester polymerization
Selected crosslinking applications: Senthos Chem
Core Advantages of ST-TBPB
High Purity: Supports stable and consistent polymerization performance.
High-Temperature Activity: Suitable for later-stage initiation in polymerization processes.
Complementary Use with BPO: Helps create a staged initiation system across different temperature ranges.
Broad Application Range: Suitable for EPS, LDPE, and unsaturated polyester resin systems.
Packaging & Storage
Packaging: Available packaging: 18–20 kg PE drums.
Storage Conditions: Store in a cool, dry, and well-ventilated area, away from heat, direct sunlight, and incompatible materials.