Dialkyl peroxides commercial availability

Diall l Peroxides. Some commercially available diaLkyl peroxides and their corresponding 10-h half-life temperatures in dodecane are Hsted in Table 6 (44). DiaLkyl peroxides initially cleave at the oxygen—oxygen bond to generate alkoxy radical pairs ... 

The following commercially available dialkyl peroxides are produced according to equations 24—27 di-Z fZ-butyl peroxide from hydrogen peroxide and sulfated tert-huty alcohol or isobutylene dicumyl peroxide from a-cumyl hydroperoxide and cumyl alcohol, cumyl chloride, and/or a-methylstyrene m- and -di(2-/ f2 -butylperoxyisopropyl)ben2ene [2781-00-2] from tert-huty hydroperoxide [75-91-2] and m- and -di(2-hydroxyisopropyl)ben2ene ... 

Commercially available MEKP formulations are mixtures of the dihydroperoxide (1), where X = OOH R = H, R = methyl, and R = ethyl (2,2-dihydroperoxybutane [2625-67 ]) and dialkyl peroxide (2), where X = OOH, Y = OOH, R = methyl, and R = ethyl (di(2-hydroperoxy-2-butyl) peroxide [126-76-1J). These formulations are widely used as free-radical initiators in the metal-promoted cure of unsaturated polyester resins at about 20°C. 

Dialkyl Peroxydicarbonates. Some commercially available dialkyl peroxydicarbonates and their corresponding 10-h half-life temperatures (determined in trichloroethylene solutions) are listed in Table 7 (45). These peroxides are active at low temperatures and initially undergo homolytic cleavage to produce alkoxycarbonyloxy radical pairs that may subsequendy decarboxylate to produce alkoxy radicals ... 

Peroxide-forming solvents and reagents should be dated at the time they are first opened, and should be either discarded or tested for peroxides within a fixed period of time after their first use. Peroxides can be detected with Nal/AcOH, though dialkyl peroxides may need treatment with concentrated HCl or 50% H2SO4 before detection with iodide is possible. A commercially available test paper, which contains a peroxidase, can detect hydroperoxides and dialkyl peroxides, as well as oxidizing anions, in organic and aqueous solvents. 

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