Perovion MEKP L60 is a liquid organic peroxide based on methyl ethyl ketone peroxide (MEKP), formulated as a higher-active-content curing agent for unsaturated polyester (UP) resin systems. Perovion MEKP L60 initiates free-radical crosslinking when combined with a cobalt accelerator, delivering efficient cure performance for both room-temperature and elevated-temperature processing. Perovion MEKP L60 is widely used across glass fiber reinforced plastic (GRP) manufacturing, gelcoat application, laminating, and casting, where faster gelation and strong through-cure are required for demanding production schedules.
Perovion MEKP L60 Overview
Methyl ethyl ketone peroxide is produced by reacting methyl ethyl ketone with hydrogen peroxide, yielding a mixture of mono- and di-peroxide species with a defined active oxygen content. Perovion MEKP L60 is formulated with a relatively higher active content than standard general-purpose MEKP grades, giving it a stronger initiation strength and typically faster gel times in comparable resin systems. This higher active content makes Perovion MEKP L60 well suited to applications where efficient curing and reduced cycle time are priorities, without sacrificing the low-water-content profile that supports consistent surface quality.
As a liquid initiator, Perovion MEKP L60 is dosed volumetrically into resin batches using standard metering pumps or manual dosing equipment. It is compatible with the cobalt octoate or cobalt naphthenate accelerators typically used in unsaturated polyester and vinyl ester formulations, and dosage levels can be adjusted to fine-tune gel time and exotherm for a given production environment. Consistent batch-to-batch quality supports reliable process control for fabricators working to tight scheduling windows.
Key Features
- Higher Active Content for Efficient Curing: Perovion MEKP L60 carries a higher active oxygen content than standard general-purpose MEKP grades, supporting faster gelation and efficient radical generation in a range of unsaturated polyester and vinyl ester resin systems.
- Low Water Content: A controlled low water content supports consistent gel-time behavior batch to batch and helps reduce the risk of surface defects, such as pinholing, in gelcoat and laminate applications where finish quality is critical.
- Dual-Mode Cure Capability: In addition to room-temperature curing of cobalt-promoted resins, Perovion MEKP L60 supports elevated-temperature cure of unpromoted unsaturated polyester resins, giving processors flexibility across different production methods and equipment.
- Faster Gel Times in Comparable Systems: The elevated active oxygen level of Perovion MEKP L60 can shorten gel times relative to lower-concentration MEKP grades, which is useful for fabricators seeking to increase mold turnaround or reduce cycle time.
- Broad Process Compatibility: Perovion MEKP L60 is suitable for hand lay-up, spray-up, casting, and continuous laminating processes, making it a practical choice for composite fabricators handling varied production methods within a single facility and across multiple product lines.
Typical Applications
Perovion MEKP L60 functions as a curing catalyst for cobalt-promoted unsaturated polyester and vinyl ester resins, initiating the free-radical crosslinking reaction that converts liquid resin into a rigid thermoset network. Its higher active content makes it particularly suitable for gelcoat systems, laminating resins, and casting applications where efficient through-cure and reduced tack-free time are valued.
Common end uses for Perovion MEKP L60 include glass fiber reinforced plastic (GRP) panels and tanks, gelcoat finishing layers, hand lay-up and spray-up laminates, and general-purpose casting resins. It is also applicable to continuous laminating lines where a higher-reactivity, low-water-content initiator is required to support consistent production output across multiple shifts and operators.
Technical Specifications
- Chemical Type: Methyl ethyl ketone peroxide (MEKP)
- CAS No.: 1338-23-4
- Physical Form: Clear liquid
- Reactivity Level: Higher active content relative to standard general-purpose MEKP grades
- Density at 20°C: Approximately 1.18 g/mL (indicative for this MEKP grade; to be confirmed based on the final specification sheet)
- Flash Point: Approximately 63°C (indicative for this MEKP grade; to be confirmed based on the final specification sheet)
- Active Content / Total Active Oxygen: To be confirmed based on the final specification sheet.
- Water Content: Low; exact value to be confirmed based on the final specification sheet.
- Viscosity at 20°C: To be confirmed based on the final specification sheet.
Thermal Stability
- Organic peroxides, including Perovion MEKP L60, are thermally unstable substances and must be handled and stored with appropriate care at all times to avoid accidental decomposition.
- Self-Accelerating Decomposition Temperature (SADT): To be confirmed based on the final specification sheet.
Storage Recommendations
- Recommended maximum storage temperature: Below 25°C (indicative for this MEKP grade; to be confirmed based on the final specification sheet).
- Store in a dry, well-ventilated area away from heat sources, direct sunlight, and incompatible materials.
- Keep containers tightly closed and stored upright to prevent leakage and contamination.
- Avoid contact with reducing agents, acids, alkalis, and heavy metal compounds such as cobalt, manganese, and other transition metal salts unless controlled accelerator dosing is intended.
- Rotate stock on a first-in, first-out basis and inspect containers periodically for signs of leakage or damage.
Packaging & Transport
- Standard Packaging: Available in approved industrial packaging, such as drums or IBCs; exact options to be confirmed based on the final specification sheet.
- Net Weight: To be confirmed based on the final specification sheet.
- UN Number: UN 3105 (indicative for this MEKP grade; to be confirmed based on the final specification sheet).
- Transport Classification: Organic Peroxide Type D, Division 5.2 (indicative for this MEKP grade; to be confirmed based on the final specification sheet).
- Certificate of Analysis (COA): Provided per batch upon shipment.
- Documentation: Labels and Safety Data Sheet (SDS) prepared in accordance with transport and destination regulations; industrial use only.
Perovion MEKP L60: Safety & Handling
Perovion MEKP L60 should be handled in accordance with applicable safety procedures for organic peroxides. The product is classified as an oxidizing and thermally unstable material and requires appropriate storage, segregation, and handling measures to prevent accidental decomposition or contamination. Users are advised to review the Safety Data Sheet prior to handling and to implement suitable personal protective equipment and engineering controls, including eye protection, chemical-resistant gloves, and adequate ventilation in the work area.
Spills should be contained and cleaned up promptly using absorbent materials compatible with organic peroxides, and contaminated waste should be disposed of according to local regulations. Safety Data Sheet and destination-compliant labeling information for Perovion MEKP L60 are available upon request. For related products, see also Perovion MEKP L50 and Perovion MEKP L50A.