Perovion DEHP L14 is a 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane formulation supplied as a liquid, temperature-controlled organic peroxide. Perovion DEHP L14 is a bifunctional diperoxyester used as an initiator for the suspension polymerization of styrene and as a curing agent for unsaturated polyester and vinylester resins. Perovion DEHP L14 is widely used in hot press molding of DMC and BMC compounds, and in styrene suspension processes running around 90°C.
Perovion DEHP L14 Overview
Perovion DEHP L14 belongs to the diperoxyester family, combining two 2-ethylhexanoylperoxy groups on a single dimethylhexane backbone. This bifunctional structure gives Perovion DEHP L14 two reactive peroxide sites per molecule, supporting efficient cross-link formation and cure in thermoset resin systems while also serving as an effective initiator in styrene suspension polymerization, a dual capability that few other single peroxide products offer. Because it is classified under UN Division 5.2 as temperature controlled, Perovion DEHP L14 requires closer attention to storage and transport temperature than many single-function peroxyesters used elsewhere in resin curing and polymer production.
Key Features
- Bifunctional reactivity: Two peroxyester groups per molecule give Perovion DEHP L14 efficient cross-linking action in thermoset resin curing applications.
- Hot press molding compatibility: Perovion DEHP L14 is preferred for curing unsaturated polyester and vinylester resin based DMC and BMC formulations in the 120°C to 160°C range.
- Styrene suspension initiation: The formulation can be used as an initiator for suspension polymerization of styrene at approximately 90°C.
- Neat liquid supply form: Perovion DEHP L14 is supplied without carrier dilution, simplifying formulation calculations for resin producers.
- Temperature-controlled logistics: Perovion DEHP L14 is classified as a Division 5, type C temperature-controlled organic peroxide, requiring dedicated cold-chain handling.
Typical Applications
Perovion DEHP L14 is preferred for curing unsaturated polyester and vinylester resin based hot press molding formulations, such as dough molding compound (DMC) and bulk molding compound (BMC), in the 120°C to 160°C temperature range typical of these compression molding processes. Its bifunctional structure supports efficient, uniform cure through the thickness of molded parts, an important factor for structural components molded under pressure and heat.
In suspension polymerization processes, Perovion DEHP L14 can be used for the polymerization of styrene at approximately 90°C, offering an alternative initiator option for producers running suspension-grade polystyrene resin production lines. This dual capability across both the polymer production and thermoset composites market segments gives formulators flexibility when standardizing on a smaller set of qualified initiators across otherwise distinct manufacturing operations.
Formulators typically qualify bifunctional diperoxyester curing agents of this type against gel time, cure rate, and final cross-link density under the specific press temperature and cycle time used on a given molding line. Because performance is sensitive to storage history and residual activity loss over time, resin producers commonly retest incoming batches before committing them to full production runs.
Technical Specifications
- Chemical Type: 2,5-Dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane
- Appearance: Colorless to slightly yellow liquid
- Active Content: Neat (undiluted)
- 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: 13052-09-0
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. Perovion DEHP L14 is classified as an organic peroxide type C, temperature controlled, Division 5, reflecting its bifunctional reactivity and the need for consistent cold-chain handling from manufacture through warehousing to final use.
- 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.
Maintaining consistent product quality between manufacture and use depends on strict adherence to the specified temperature range at every stage of the supply chain, since temperature excursions can accelerate decomposition and shorten the effective service life of the material before it reaches the point of use.
Storage Recommendations
- Store Perovion DEHP L14 under temperature-controlled conditions 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 with refrigerated transport; 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, temperature controlled
- Exact transport documentation, packing group, temperature control class, and regional classification: To be confirmed based on the final specification sheet.
In DMC and BMC compression molding, cure speed and cross-link density directly determine cycle time, part strength, and surface finish quality of the finished component. In styrene suspension polymerization, initiator reactivity affects particle size distribution and bead morphology of the resulting resin, both of which influence downstream processing behavior. Selecting a bifunctional initiator that performs reliably across both applications reduces the number of distinct peroxide grades a formulator needs to qualify and stock.
Perovion DEHP L14: Safety & Handling
Perovion DEHP L14 should be handled in accordance with applicable safety procedures for organic peroxides. Given its bifunctional structure and temperature-controlled classification, the product requires strict adherence to specified storage and transport temperatures, along with avoidance of contact with incompatible materials such as reducing agents and heavy metal compounds. Operators should avoid contact with skin and eyes, and should ensure adequate ventilation wherever Perovion DEHP L14 is mixed, transferred, or applied.
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 bifunctional peroxide products used in thermoset and polymer production processes, see also Perovion TBPC L22-50 and Perovion DBPH P14-45.