tert-Butyl 3,5,5-trimethylperoxyhexanoate

tert-Butyl 3,5,5-trimethylperoxyhexanoate (CAS 13122-18-4), also known commercially as tert-butyl per-iso-nonanoate, is an organic peroxide used as a free-radical source in polymer manufacturing. It functions as a polymerization initiator and curing agent across rubber, plastics, and coating applications. In plastics and polymer production, it initiates free-radical polymerization of vinyl and acrylic monomers, controlling molecular weight and conversion rates at mid-range processing temperatures. Rubber compounders use it to cross-link elastomers.

This chemical improves mechanical strength and heat resistance in finished seals, gaskets, and molded components. In coatings and adhesive formulations, it drives the cure of unsaturated resins, enabling controlled hardening profiles suited to industrial application windows. Sealant and elastomer producers select it where a defined half-life temperature aligns with their processing or oven-cure conditions. This ensures consistent performance during the manufacturing of high-performance industrial materials.

The product is supplied as a liquid, typically in diluted or phlegmatized form to meet transport and handling requirements for organic peroxides. Concentrations vary by supplier, with technical-grade solutions being the standard commercial offering. Packaging ranges from small drums to bulk quantities depending on volume requirements and regional regulatory classifications. Proper storage and temperature control are essential to maintain the stability and efficacy of this reactive chemical intermediate.