Luperox Delta-X-9 Methyl Ethyl Ketone Peroxide Solutions 1338-23-4 Arkema North America South and Central America Western Europe Central and Eastern Europe Middle East and Central Asia Crosslinking / Coupling / Curing Agents Polyester Vinyl Coatings Architectural / Decorative Automotive OEM General Industrial /Maintenance Insoluble in water Miscible in ethylacetate Luperox Delta X-9 Phthalate free MEKP formulated to give faster gel and cure times in a wide variety of ortho and isophthalic resin systems. Luperox Ketone Peroxides are used exclusively for the cure of promoted unsaturated polyester resins and vinyl ester resins at ambient temperatures. The function of the promoter, usually a transition metal salt such as cobalt naphthenate or octoate, is to activate decomposition of the peroxide or initiator. Ketone peroxides. Offers faster gel and cure times. Used in ortho and isophthalic resin systems.