Perovion TMCH P29-40 is a powder-form organic peroxide containing 39.0–41.0% of 1,1-Di(tert-butylperoxy)-3,3,5-trimethylcyclohexane (TMCH) dispersed on an inert mineral carrier. Upon thermal decomposition, it generates free radicals that drive crosslinking of rubber and polyolefin compounds at processing temperatures above 115°C. Perovion TMCH P29-40 is formulated to provide compounders with a safe, easy-to-disperse solid peroxide that integrates readily into internal mixer and open-mill compounding workflows, offering a practical alternative to liquid organic peroxide systems for rubber vulcanization applications.
Key Features
- Powder Dispersion on Inert Carrier: Perovion TMCH P29-40 is supplied as a free-flowing white powder in which the active peroxide is uniformly distributed on a mineral carrier system at 39.0–41.0% active content. This format reduces handling hazards associated with neat liquid peroxides and simplifies accurate dosing and weighing during rubber batch preparation and compounding operations.
- Good Scorch Safety at 115°C: The product maintains acceptable scorch safety up to a processing temperature of 115°C, with a rheometer ts2 exceeding 20 minutes under standard test conditions. This processing window helps manufacturers sustain compound quality and production consistency during mixing, calendering, and pre-forming operations without premature crosslinking.
- Bifunctional Crosslinking Efficiency: As a bifunctional peroxide, TMCH generates two reactive radicals per molecule upon thermal decomposition, promoting efficient crosslink network formation within rubber matrices. This mechanism leads to vulcanizates with well-balanced mechanical properties, including improved tensile strength, compression set resistance, and heat aging performance compared to monofunctional peroxides.
- Broad Polymer Substrate Compatibility: Perovion TMCH P29-40 is suitable for crosslinking a range of polymers including EPDM, HNBR, POE, natural rubber, and other synthetic rubber types, as well as thermoplastic polyolefins. This versatility allows formulators to rationalize their peroxide inventory and apply a single crosslinking agent across multiple compound recipes and application segments.
- Wire and Cable Application Suitability: The product is recognized for use in wire and cable insulation and jacketing compounds, where consistent crosslink density and retention of electrical properties over service life are required. Its solid powder form supports clean, dust-controlled mixing practices and is compatible with the handling requirements of cable manufacturing environments.
Typical Applications
Perovion TMCH P29-40 functions as a crosslinking agent in rubber compounding, where thermal activation at temperatures around 145°C — corresponding to a rheometer t90 of approximately 12 minutes — produces vulcanizates with controlled and reproducible crosslink network density. The peroxide crosslinking mechanism avoids sulfur-related discoloration, blooming, and off-gassing associated with conventional sulfur vulcanization systems, making it well-suited for rubber articles that require color stability, low compression set, and resistance to long-term heat aging in service conditions up to 150°C and above.
End-use applications include EPDM and HNBR sealing compounds, gaskets, and molded rubber parts for automotive cooling, fuel, and HVAC systems; polyolefin elastomer (POE) crosslinking for flexible foam, film, and sheet applications; wire and cable insulation and semiconductor screening compounds; and heat-resistant industrial rubber articles such as hoses, vibration dampers, and roll coverings. The powder form is also compatible with continuous mixing processes and automated gravimetric dosing systems used in high-volume rubber manufacturing operations.
Technical Specifications
- Chemical Type: 1,1-Di(tert-butylperoxy)-3,3,5-trimethylcyclohexane (TMCH)
- Appearance: White to off-white free-flowing powder
- Active Content: 39.0–41.0%
- Total Active Oxygen: 4.13–4.34%
- Density at 20°C: To be confirmed based on the final specification sheet.
- Viscosity at 20°C: N/A — solid powder form
- 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: 60°C
Storage Recommendations
- Recommended maximum storage temperature: 30°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: To be confirmed based on the final specification sheet.
- Net Weight: To be confirmed based on the final specification sheet.
- UN Number: UN 3110
- Transport Class: Organic peroxide type F, solid; Class 5.2
Perovion TMCH P29-40: Safety & Handling
Perovion TMCH P29-40 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 TMCH L29 and Perovion DCP PBC.