Tert-Butyl peroxybenzoate

Tert-Butyl peroxybenzoate (CAS 614-45-9) is an organic peroxide supplied under trade names including Trigonox C, Perbutyl Z, Esperox 10, Chaloxyd TBPB, and VAROX TBPB. It belongs to the peroxyester class and decomposes thermally to generate free radicals, making it reactive across a range of industrial processes.

In polymer manufacturing, it initiates crosslinking of polyester resins and silicone rubbers by generating radicals that form covalent bonds between polymer chains, increasing mechanical strength and heat resistance. It also functions as a high-temperature cure initiator for unsaturated polyesters in coatings and composite applications, where its half-life temperature profile suits elevated-temperature processing cycles.

This product is available in liquid form and supplied under REACH compliance for European markets. It carries an HS code of 29163900 and is handled under organic peroxide transport regulations. Procurement teams should confirm concentration grade and packaging format, as these determine classification and storage requirements.