Description

Description

Methyl Ethyl Ketone Peroxide (MEKP) is a highly reactive organic peroxide with the molecular formula C₈H₁₈O₆ and CAS number 1338-23-4. This compound, also known by its IUPAC name 2-hydroperoxy-2-(2-hydroperoxybutan-2-ylperoxy)butane, is widely utilized as a radical initiator in polymerization reactions, particularly in the curing of unsaturated polyester resins. MEKP is supplied as a clear, colorless to pale yellow liquid, typically dissolved in a phlegmatizer such as dimethyl phthalate for safe handling. It is available in various concentrations, with common commercial grades ranging from 30% to 60% active peroxide content.

MEKP is a critical component in the composites industry, offering excellent reactivity and curing performance at ambient temperatures. Its decomposition generates free radicals that initiate cross-linking reactions, making it indispensable for fiberglass-reinforced plastics (FRP), automotive parts, marine applications, and construction materials. Due to its hazardous nature, MEKP must be stored in a cool, well-ventilated area away from heat sources and incompatible materials. Proper personal protective equipment (PPE), including gloves and safety goggles, is required when handling this chemical.

Application

Methyl Ethyl Ketone Peroxide (MEKP) is primarily used as a curing agent for unsaturated polyester resins in the production of fiberglass-reinforced plastics (FRP). It enables room-temperature curing, making it ideal for manufacturing boat hulls, automotive components, and construction panels. MEKP also serves as a radical initiator in polymerization reactions for specialty coatings and adhesives. Its fast reactivity and efficient cross-linking properties ensure high-quality, durable composite materials.

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