Perovion TBPB LC is a liquid organic peroxide based on tert-butyl peroxybenzoate (TBPB) chemistry, formulated as a high-purity initiator for elevated-temperature curing of unsaturated polyester (UP) resin systems. Perovion TBPB LC decomposes thermally to generate free radicals that drive crosslinking in hot press moulding processes, including sheet moulding compound (SMC) and bulk moulding compound (BMC) formulations used across automotive and electrical component manufacturing. Perovion TBPB LC is widely used across compression moulding and other high-temperature composite manufacturing routes where a well-defined, single-stage decomposition profile is required to achieve consistent part properties and cycle times across large-volume production runs.
Perovion TBPB LC Overview
tert-Butyl peroxybenzoate is an aromatic perester produced by reacting tert-butyl hydroperoxide with benzoyl chloride, yielding a single, well-defined peroxide species rather than a mixture of species as seen in ketone peroxides. Perovion TBPB LC is supplied as a high-assay, high-active-oxygen clear liquid, giving formulators a predictable and reproducible decomposition profile at hot-press moulding temperatures. This purity and consistency support tight process control across large production runs, helping moulders maintain predictable cycle times and reduce the variability that can arise from less well-defined initiator chemistries.
As a liquid initiator, Perovion TBPB LC is metered directly into SMC and BMC compounds during compounding, without the need for a room-temperature accelerator system. It activates thermally at elevated mould temperatures, making it well suited to hot press moulding, transfer moulding, and other processes that rely on heat rather than chemical promoters to initiate cure. This heat-activated behavior also allows for longer compound shelf life prior to moulding compared with room-temperature-cured systems.
Key Features
- High Purity Aromatic Perester: Perovion TBPB LC is supplied at high assay with a single, well-defined active species, giving formulators a predictable decomposition profile compared with mixed-composition ketone peroxides.
- High Active Oxygen Content: Perovion TBPB LC delivers a high active oxygen content, supporting efficient radical generation and thorough crosslinking during hot press moulding cycles.
- Optimized for Hot Press Moulding: Perovion TBPB LC is specifically suited to the elevated-temperature cure of SMC and BMC formulations, activating reliably across the typical hot-press temperature range without requiring a chemical accelerator.
- Consistent Batch-to-Batch Quality: Tight control over assay and active oxygen content in Perovion TBPB LC supports reproducible cure behavior and part quality across successive production batches.
- Broad Compatibility with Thermoset Systems: Perovion TBPB LC is applicable to a range of unsaturated polyester and related thermoset formulations used in compression moulding, transfer moulding, and other elevated-temperature composite processes across automotive, electrical, and industrial equipment manufacturing.
Typical Applications
Perovion TBPB LC functions as a thermally activated curing initiator for unsaturated polyester resin systems processed by hot press moulding. Its single-species decomposition profile provides predictable gel and cure behavior across the mould temperature range typically used for SMC and BMC compression moulding, supporting consistent part quality across production runs and helping moulders minimize scrap rates associated with inconsistent cure or premature gelation.
Common end uses for Perovion TBPB LC include sheet moulding compound (SMC) and bulk moulding compound (BMC) parts for automotive, electrical, and appliance housings, as well as other compression-moulded thermoset components used in structural and semi-structural applications. It is also applicable to transfer moulding and general hot-press composite processes requiring elevated-temperature initiation, including glass-fiber-reinforced structural components manufactured at scale.
Technical Specifications
- Chemical Type: tert-Butyl peroxybenzoate (TBPB)
- CAS No.: 614-45-9
- Physical Form: Clear liquid
- Assay: Approximately 98.0% min. (indicative for this TBPB grade; to be confirmed based on the final specification sheet)
- Active Oxygen Content: Approximately 8.07% min. (indicative for this TBPB grade; to be confirmed based on the final specification sheet)
- Density at 20°C: Approximately 1.04 g/cm³ (indicative for this TBPB grade; to be confirmed based on the final specification sheet)
- Recommended Cure Temperature Range: Approximately 120-170°C (indicative for hot press moulding; to be confirmed based on the final specification sheet)
- Viscosity at 20°C: To be confirmed based on the final specification sheet.
Thermal Stability
- Organic peroxides, including Perovion TBPB LC, are thermally unstable substances and must be handled and stored with appropriate care at all times to avoid accidental decomposition.
- Self-Accelerating Decomposition Temperature (SADT): To be confirmed based on the final specification sheet.
Storage Recommendations
- Recommended maximum storage temperature: To be confirmed based on the final specification sheet.
- Store in a dry, well-ventilated area away from heat sources, direct sunlight, and incompatible materials.
- Keep containers tightly closed and stored upright to prevent leakage and contamination, and label partially used containers clearly.
- Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds that can accelerate decomposition.
- Rotate stock on a first-in, first-out basis and inspect containers periodically for signs of leakage or damage.
Packaging & Transport
- Standard Packaging: Available in approved industrial packaging, such as drums or IBCs; exact options to be confirmed based on the final specification sheet.
- Net Weight: To be confirmed based on the final specification sheet.
- UN Number: To be confirmed based on the final specification sheet.
- Transport Class: To be confirmed based on the final specification sheet.
- Certificate of Analysis (COA): Provided per batch upon shipment, confirming assay and active oxygen content.
- Documentation: Labels and Safety Data Sheet (SDS) prepared in accordance with transport and destination regulations; industrial use only.
Perovion TBPB LC: Safety & Handling
Perovion TBPB LC should be handled in accordance with applicable safety procedures for organic peroxides. The product is classified as an oxidizing and thermally unstable material and requires appropriate storage, segregation, and handling measures to prevent accidental decomposition or contamination. Users are advised to review the Safety Data Sheet prior to handling and to implement suitable personal protective equipment and engineering controls, including eye protection, chemical-resistant gloves, and adequate ventilation in the work area, particularly when handling the product at elevated temperatures near the moulding press.
Spills should be contained and cleaned up promptly using absorbent materials compatible with organic peroxides, and contaminated waste should be disposed of according to local regulations and destination-specific environmental requirements. Safety Data Sheet and destination-compliant labeling information for Perovion TBPB LC are available upon request. For related products, see also Perovion AAP-TBPB L27 and Perovion TBPIN L42.