Perovion TBPC L22-50 is a 1,1-di(tert-butylperoxy)cyclohexane formulation supplied as a 50% solution in mineral oil. Perovion TBPC L22-50 is a dialkyl peroxide initiator used for the polymerization of styrene, acrylonitrile, and (meth)acrylates. Perovion TBPC L22-50 is widely used in the bulk polymerization of styrene and in styrene copolymer systems requiring initiation at elevated process temperatures.
Perovion TBPC L22-50 Overview
Perovion TBPC L22-50 belongs to the ketal-type dialkyl peroxide family, formed from cyclohexanone and tert-butyl hydroperoxide. This structure gives the initiator a higher decomposition temperature than the peroxyesters and diacyl peroxides commonly used for lower-temperature polymerization, positioning it for processes that run in the 90°C to 125°C range, complementing the lower-temperature initiators used elsewhere in a typical polymer plant’s peroxide portfolio. Diluting the active peroxide to 50% in mineral oil improves handling safety and metering accuracy in industrial polymerization plants.
Key Features
- High-temperature reactivity: Perovion TBPC L22-50 is designed for polymerization processes running between roughly 90°C and 125°C, complementing lower-temperature initiators in a plant’s overall peroxide portfolio.
- Bulk styrene polymerization compatibility: Perovion TBPC L22-50 initiates bulk polymerization of styrene in the 90°C to 120°C range, supporting standard polystyrene production schedules used across a wide range of continuous and batch reactor configurations.
- Broad copolymer compatibility: The formulation is effective for styrene, acrylonitrile, acrylate, and methacrylate copolymerization systems in the 95°C to 125°C range, covering a broad set of common ABS and SAN-type copolymer processes.
- Blendable with other peroxides: Combining Perovion TBPC L22-50 with faster-reacting initiators helps producers tune the overall reactivity profile of a polymerization batch, supporting consistent conversion across the entire reaction cycle.
- Mineral oil carrier system: The carrier is chosen for compatibility with standard peroxide dosing equipment used across polymer plants, simplifying integration into existing process infrastructure.
Typical Applications
Perovion TBPC L22-50 is used as an initiator for the bulk polymerization of styrene, where its higher decomposition temperature allows processors to maintain good conversion rates at the elevated temperatures typical of continuous bulk polystyrene production. This reactivity profile supports efficient monomer conversion while helping control residual monomer levels in the finished resin, an important quality parameter for downstream molding and extrusion processes.
Beyond bulk polystyrene, Perovion TBPC L22-50 is used in the copolymerization of styrene with acrylonitrile, acrylates, and methacrylates in the 95°C to 125°C range. Its high-temperature reactivity profile makes it a useful complement to faster-reacting initiators in multi-stage polymerization processes where a broad temperature and conversion window is required, particularly in reactors that ramp through several temperature zones during a single batch.
Formulators typically qualify high-temperature dialkyl peroxide initiators of this type against target conversion rate, residual monomer level, and molecular weight distribution at the reactor exit. Because reactivity depends on dilution level, carrier oil, and storage history, many producers run small-scale trial batches before committing a new initiator grade to full production volume.
Technical Specifications
- Chemical Type: 1,1-Di(tert-butylperoxy)cyclohexane
- Appearance: Colorless to slightly yellow liquid
- Active Content: 50% in mineral oil
- Active Oxygen Content: To be confirmed based on the final specification sheet.
- Density at 20°C: To be confirmed based on the final specification sheet.
- Assay: To be confirmed based on the final specification sheet.
- CAS Number: 3006-86-8
Thermal Stability
As with all organic peroxides, controlling exposure to heat, contamination, and mechanical shock during storage and handling is essential to maintaining safe and predictable decomposition behavior. Because Perovion TBPC L22-50 has a higher decomposition temperature than many other commercial peroxide classes, it generally tolerates a wider ambient storage window than faster-decomposing peroxide classes, though standard organic peroxide precautions still apply at all times.
- Organic peroxides are thermally unstable substances and must be handled with appropriate care at all times.
- Self-Accelerating Decomposition Temperature (SADT): To be confirmed based on the final specification sheet.
- Recommended maximum storage temperature: To be confirmed based on the final specification sheet.
As with other liquid dialkyl peroxide concentrates, maintaining product quality between manufacture and use depends on avoiding prolonged exposure to elevated ambient temperature, contamination, and physical damage to containers during warehousing and transport.
Storage Recommendations
- Store in a cool, dry, well-ventilated area away from direct sunlight and other heat sources.
- Keep containers tightly closed when not in use to prevent contamination and moisture ingress.
- Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds, which can trigger premature decomposition.
- Recommended shelf life under proper storage conditions: To be confirmed based on the final specification sheet.
Packaging & Transport
- Standard Packaging: Plastic drums or IBC totes; typical net weights available on request based on customer volume and logistics requirements.
- UN Number: To be confirmed based on the final specification sheet.
- Hazard Class: Organic peroxide, Class 5.2
- Exact transport documentation, packing group, hazard labeling, and regional classification: To be confirmed based on the final specification sheet.
In bulk styrene polymerization, initiator selection at elevated temperature directly influences conversion rate, molecular weight distribution, and the residual monomer content of the finished resin, all of which affect downstream processing behavior and product clarity. In styrene copolymer systems, matching initiator reactivity to the target reactor temperature profile helps producers achieve consistent composition and properties across multiple production runs. Selecting the right high-temperature initiator is therefore an important part of process optimization for both homopolymer and copolymer styrene systems.
Perovion TBPC L22-50: Safety & Handling
Perovion TBPC L22-50 should be handled in accordance with applicable safety procedures for organic peroxides. The product is classified as an oxidizing material and requires appropriate storage and handling measures at all times, including avoidance of contact with incompatible materials and heat sources. Operators should avoid contact with skin and eyes, and should ensure adequate ventilation wherever this initiator is mixed, transferred, or applied, since vapors and mist can be irritating with prolonged exposure.
Users are advised to review the Safety Data Sheet prior to handling and to implement appropriate personal protective equipment and engineering controls as specified therein. Safety Data Sheet and destination-compliant labeling information are available upon request. For related dialkyl peroxide initiators used across similar high-temperature polymerization processes, see also Perovion DBPH P14-45 and Perovion TBPEH L21.