Perovion DHBP P10-45S is a paste-form organic peroxide formulation containing 45% of 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane (DHBP) in a silicone oil and silica carrier. Formulated specifically for the crosslinking of silicone rubber compounds, Perovion DHBP P10-45S combines the high-temperature activation profile of DHBP with the dispersion advantages of a silicone-compatible paste matrix. The product delivers excellent scorch safety up to 135°C and a typical crosslinking temperature of 175°C, making it well-suited for both compression and continuous vulcanization of silicone rubber articles across a range of industrial applications.
Key Features
- 45% DHBP in Silicone Oil and Silica Carrier: Perovion DHBP P10-45S is supplied as a smooth paste containing 45% active DHBP dispersed in a combined silicone oil and silica matrix. This silicone-compatible carrier system promotes uniform distribution of the active peroxide throughout the silicone rubber compound, supporting consistent cure response and minimizing the risk of localized under-cure or over-cure regions in finished articles.
- Excellent Scorch Safety up to 135°C: Rubber compounds prepared with Perovion DHBP P10-45S exhibit excellent scorch safety, with a rheometer ts2 exceeding 20 minutes at 135°C under standard test conditions. This processing stability enables compounders to mix, extrude, and pre-form silicone rubber compounds at elevated temperatures without premature crosslinking, supporting clean and reproducible manufacturing workflows.
- Effective Silicone Rubber Crosslinking at 175°C: Perovion DHBP P10-45S activates at a typical crosslinking temperature of 175°C, with a rheometer t90 of approximately 12 minutes. This well-defined activation window is compatible with standard silicone rubber press-cure, oven-cure, and continuous vulcanization processes, delivering reproducible crosslink density and consistent physical properties across production runs.
- Silicone-Compatible Paste Matrix for Clean Incorporation: The silicone oil carrier is chemically compatible with silicone rubber gum and compound formulations, ensuring that the paste integrates cleanly into the compound without introducing incompatible additives that could affect electrical properties, transparency, or regulatory compliance of the cured article. The silica component provides the paste with structural consistency and prevents phase separation during storage and handling.
- Bifunctional DHBP for Dense Crosslink Networks: As a bifunctional peroxide, DHBP generates two reactive radical centers per molecule upon thermal decomposition, enabling efficient crosslink network formation within silicone rubber matrices. Cured articles exhibit good tensile strength, elongation retention, compression set resistance, and thermal aging stability, supporting performance in demanding service environments including elevated temperatures and dynamic loading conditions.
Typical Applications
Perovion DHBP P10-45S is incorporated into silicone rubber compounds on mixing rolls or in internal mixers, where the silicone oil and silica paste matrix facilitates uniform blending with the silicone gum without contaminating the compound with incompatible carriers. Upon curing at 175°C, the DHBP radical mechanism produces a thermally stable silicone vulcanizate. Post-cure operations are typically recommended to remove volatiles from peroxide decomposition, which also contributes to improved compression set and mechanical properties in the finished article.
End-use applications include silicone rubber profiles, tubing, and sheet for construction sealing, glazing, and HVAC systems; molded and extruded silicone parts for automotive components, household appliances, and industrial equipment requiring heat and electrical insulation resistance; food-contact and medical-grade silicone goods where a clean, silicone-compatible cure system is required; wire and cable insulation and jacketing in silicone rubber for high-temperature electrical applications; and specialty silicone rubber articles requiring low compression set and long-term dimensional stability in service at elevated temperatures.
Technical Specifications
- Chemical Type: 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane (DHBP) in silicone oil and silica
- Appearance: White to off-white smooth paste
- Active Content: 45%
- Total Active Oxygen: To be confirmed based on the final specification sheet.
- Density at 20°C: To be confirmed based on the final specification sheet.
- Viscosity at 20°C: N/A — paste 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: 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 and direct sunlight.
- Keep containers tightly closed.
- Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds.
Packaging & Transport
- Standard Packaging: 20 kg
- Net Weight: 20 kg
- UN Number: To be confirmed based on the final specification sheet.
- Transport Class: To be confirmed based on the final specification sheet.
Perovion DHBP P10-45S: Safety & Handling
Perovion DHBP P10-45S 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.