Perovion TMCH L29 is a high-concentration organic peroxide initiator based on 1,1-Di(tert-butylperoxy)-3,3,5-trimethylcyclohexane dissolved in isododecane at 90% active content. It generates free radicals upon thermal decomposition, making it suitable for elevated-temperature curing of unsaturated polyester and vinyl ester resins, as well as for radical-initiated polymerization of a broad range of industrial monomers. The product addresses the needs of thermoset composite manufacturers, polymer producers, and acrylics processors who require a reliable and versatile high-temperature initiator.
Key Features
- High Active Content at 90%: Perovion TMCH L29 contains 88.0–90.0% of the active peroxide species in isododecane solution. This concentration level allows formulators to use precise dosage quantities while maintaining consistent radical output across production batches, supporting process repeatability in both continuous and batch manufacturing environments.
- Versatile Initiator Across Multiple Segments: The product functions effectively as both a curing agent for thermoset composite resins and a polymerization initiator for vinyl and acrylic monomers. It is applicable across BMC, SMC, TMC, prepreg, and pultrusion composite processes, as well as LDPE production, polystyrene manufacture, and acrylic and optical monomer polymerization, providing broad compatibility with established industrial processes.
- Stability in Pigmented and Filled Systems: Perovion TMCH L29 exhibits stability in the presence of pigments, including carbon black, without adverse effects on cure reactivity or product quality. This characteristic is particularly relevant for composite manufacturers working with colored BMC and SMC compounds, where peroxide-pigment interaction can otherwise affect shelf life and cure profiles.
- Excellent Catalyzed Shelf Life in BMC and SMC: When incorporated into BMC and SMC formulations with standard catalysts, Perovion TMCH L29 supports extended pre-moulding shelf life. This property allows compound manufacturers and moulding operations to maintain flexibility in production scheduling while keeping catalyzed material within specification during storage prior to pressing.
- Suitable for Elevated-Temperature Cure Cycles: Perovion TMCH L29 is designed for processes that apply heat during curing, including hot-press moulding and continuous pultrusion. Its decomposition kinetics at elevated temperatures support controlled radical generation, allowing engineers to design cure cycles that achieve target mechanical properties within defined cycle times.
Typical Applications
Perovion TMCH L29 is widely used in the thermoset composites industry as a curing initiator for unsaturated polyester and vinyl ester resin systems processed at elevated temperatures. In hot-press moulding operations, the product initiates crosslinking of the resin matrix within SMC, BMC, and TMC charges, producing structural composite components used in automotive, electrical, and construction applications. In pultrusion, Perovion TMCH L29 is incorporated into resin bath formulations to enable continuous fibre-reinforced profile production with consistent throughput.
In polymer production, Perovion TMCH L29 serves as a radical initiator for the (co)polymerization of ethylene to produce low-density polyethylene (LDPE), styrene-based polymers, acrylonitrile-containing copolymers, and acrylic or methacrylic polymers. It is also used in the polymerization of diethylene glycol bis(allyl carbonate), a monomer widely used in the optical lens industry. For acrylics producers, Perovion TMCH L29 supports the polymerization of acrylate and methacrylate systems under elevated temperature conditions, including cast sheet and continuous cell polymerization processes.
Technical Specifications
- Chemical Type: 1,1-Di(tert-butylperoxy)-3,3,5-trimethylcyclohexane (DTBPTMCH), 90% solution in isododecane
- CAS Number: 6731-36-8
- Appearance: Clear to slightly colored liquid
- Active Content: 88.0–90.0%
- Total Active Oxygen: 9.31–9.52%
- Density at 20°C: To be confirmed based on the final specification sheet.
- Viscosity at 20°C: To be confirmed based on the final specification sheet.
- Water Content: To be confirmed based on the final specification sheet.
Thermal Stability
- Organic peroxides are thermally unstable substances and must be handled with appropriate care.
- SADT: To be confirmed based on the final specification sheet.
Storage Recommendations
- Recommended maximum storage temperature: 25°C
- Store in a dry, well-ventilated area away from heat sources and direct sunlight.
- Keep containers tightly closed.
- Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds.
Packaging & Transport
- Standard Packaging: 25 kg
- Net Weight: 25 kg
- UN Number: To be confirmed based on the final specification sheet.
- Transport Class: To be confirmed based on the final specification sheet.
Perovion TMCH L29: Safety & Handling
Perovion TMCH L29 should be handled in accordance with applicable safety procedures for organic peroxides. 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 products, see also Perovion MEKP-CHP L24 and Perovion TBPB LC.