Lauroyl Peroxide (LPO, 98% Purity)

Lauroyl Peroxide (LPO) is a diacyl peroxide with a 10-hour half-life temperature of approximately 62°C, making it one of the most reactive solid peroxides available for low-temperature thermal cure of unsaturated polyester, acrylic, and vinyl ester resins. LPO generates lauroyloxy and undecyl radicals upon thermal decomposition, initiating free-radical polymerization efficiently at 50–80°C. Its relatively low half-life temperature makes it valuable in applications where full cure must be achieved at low oven temperatures, such as in continuous lamination lines, SMC maturation, and low-energy cure cycles. LPO can also be activated with amine accelerators for ambient-temperature cure, similar to BPO, though it is less commonly used in this mode. The 98% purity grade is a waxy white solid with a faint odor. Decomposition products include dodecane and CO2, which are relatively benign compared to BPO's phenyl radical products. LPO is used at dosage levels of 1–3% on resin in thermal cure applications. Store below 15°C to prevent premature decomposition.