Perovion MIBKP LHM is a methyl isobutyl ketone peroxide (MIBKP) solution used as a curing agent for unsaturated polyester resins, either alone or in combination with a cobalt accelerator, across a working temperature range of approximately 60°C to 150°C. Perovion MIBKP LHM is formulated to give composites processors a dependable balance of long working time at ambient temperature and rapid cure once elevated temperature is applied, which is especially valuable in continuous manufacturing processes where consistent line speed and predictable cure onset are critical. Perovion MIBKP LHM is widely used in filament winding, pultrusion, and continuous flat and corrugated sheet production, and is often selected specifically for its high-temperature reactivity profile.
Perovion MIBKP LHM Overview
Perovion MIBKP LHM belongs to the ketone peroxide family of free-radical initiators derived from methyl isobutyl ketone and hydrogen peroxide. Unlike simpler peroxide chemistries, the methyl isobutyl ketone peroxide structure in Perovion MIBKP LHM retains meaningful reactivity at elevated temperature even without a cobalt accelerator, which gives formulators flexibility to tune gel time and cure speed independently. This dual behavior, low reactivity at room temperature but strong reactivity above roughly 80°C, is the defining characteristic that makes Perovion MIBKP LHM a preferred choice for processes where parts must be handled, moved, or shaped before final cure is triggered by heat, since it avoids the risk of premature gelation during intermediate handling steps.
Key Features
- Wide temperature working range: Perovion MIBKP LHM cures unsaturated polyester resins effectively across 60°C to 150°C, allowing the same product to serve both cobalt-accelerated ambient cure and elevated-temperature cure processes.
- Long ambient gel time when accelerated: When combined with a cobalt accelerator, Perovion MIBKP LHM supports extended gel and production time at room temperature, giving operators a wider processing window before cure sets in and reducing the risk of scrapped batches from premature gelation.
- High reactivity without accelerator at elevated temperature: Perovion MIBKP LHM shows strong reactivity above roughly 80°C even without any cobalt accelerator, which avoids discoloration issues in applications where a colorless or unaccelerated system is required, such as light-colored gel coats or clear laminates.
- Kicker compatibility for pultrusion: Perovion MIBKP LHM can be used as a kicker peroxide alongside a lower-reactivity initiator to help drive complete cure through the thickness of pultruded profiles, particularly in thick-walled sections where heat transfer to the core is otherwise slow.
- Process versatility: Perovion MIBKP LHM is suitable across filament winding, continuous sheet lines, resin transfer molding, and hand lay-up or spray-up processes, reducing the need to qualify multiple separate curing agents across different production lines within the same facility.
Typical Applications
Perovion MIBKP LHM is primarily selected for continuous manufacturing processes where a fast, uniform through-cure is essential to keep pace with line speed. In continuous flat and corrugated sheet production, the fast elevated-temperature reactivity of Perovion MIBKP LHM allows resin-impregnated glass mat to move through a heated tunnel or press and reach full cure before final cutting and stacking, without requiring excessive dwell time or additional post-cure ovens, which helps producers maintain consistent output on high-speed continuous sheet lines.
Beyond continuous sheet lines, Perovion MIBKP LHM is used in filament winding of pipes and tanks, where a long working time at ambient temperature followed by controlled oven cure is needed, and as a kicker peroxide in pultrusion formulations alongside lower-reactivity initiators such as a benzoyl peroxide or tert-butyl perbenzoate type product to help ensure complete through-cure of thick composite profiles, an important consideration for structural pultruded parts where under-cured cores can compromise long-term mechanical performance and durability.
Technical Specifications
- Chemical Type: Methyl isobutyl ketone peroxide (MIBKP)
- Appearance: Colorless to slightly yellow liquid
- 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.
- Viscosity at 20°C: To be confirmed based on the final specification sheet.
- Water Content: To be confirmed based on the final specification sheet.
- CAS Number: 37206-20-5
Thermal Stability
- 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.
Storage Recommendations
- Store Perovion MIBKP LHM 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 such as accelerators or metal soaps, which can trigger premature decomposition and, in severe cases, violent self-accelerating reaction.
- Recommended shelf life under proper storage conditions: To be confirmed based on the final specification sheet.
Packaging & Transport
- Standard Packaging: Plastic drums, typical net weights of 20 kg and 25 kg; other packaging sizes available on request to match customer handling and storage requirements.
- UN Number: UN 3105, Organic peroxide type D, liquid
- Hazard Class: Class 5.2, Packing Group II
- Exact transport documentation and regional classification: To be confirmed based on the final specification sheet.
Perovion MIBKP LHM: Safety & Handling
Perovion MIBKP LHM should be handled in accordance with applicable safety procedures for organic peroxides. The product is classified as an oxidizing and potentially explosive material under certain conditions, particularly if allowed to dry out, and requires appropriate storage and handling measures at all times, consistent with general good practice for organic peroxide products. Operators should avoid contact with skin and eyes, keep the product away from open flames and other heat sources, and ensure adequate ventilation wherever Perovion MIBKP LHM is mixed, transferred, or applied, since vapors and mist from organic peroxides can be irritating with prolonged or repeated exposure.
Users are advised to review the Safety Data Sheet for Perovion MIBKP LHM 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 curing agents used in similar unsaturated polyester resin systems, see also Perovion MEKP L50R and Perovion MEKP-CHP L24.