Luperox KC70 Blend of Methyl Ethyl Ketone Peroxide Cumene Hydroperoxide 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 KC70 another faster form of phthalate-free MEK peroxide characterized by outstanding performance in certain vinyl ester—and isophthalic resins. 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 vinyl ester and isophthalic resin systems.