Diacyl peroxides commercial availability

Diacyl or diaroy] peroxides (36, R- alkyl or aryl respectively) are given specific coverage in reviews by Fujimori,141 Bouillion et c//.,14 and Hiatt.14j They are sources of acyloxy radicals which in turn are sources of aryl or alkyl radicals. Commercially available peroxides of this type include dibenzoyl peroxide (BPO), didodecanoyl or dilauroyl peroxide (LPO), didecanoyl peroxide (42) and succinic acid peroxide (43). 

Laboratory studies have generally focused on the diisopropyl, dicyclohexyl and di-t-butyl derivatives. These and the. s-butyl and 2-cthylhcxyl derivatives arc commercially available.189 The rates of decomposition of the peroxydicarbonates show significant dependence on the reaction medium and their concentration. This dependence is, however, less marked than for the diacyl peroxides (36) (see 3.3.1.1.4). Induced decomposition may involve a mechanism analogous to that described for diacyl peroxides. However, a more important mechanism for primary and secondary peroxydicarbonates involves abstraction of an cx-hydrogen (Scheme 3.31).190... 

These include the thermally less stable diacyl peroxides, e.g., diacetyl-, bis(2,4-dichlorobenzoyl)- or dilauryl, peroxide. The first two of these are available commercially as a 50% paste... 

Table 2 shows that commercial organic peroxides are available with 10-h half-life temperature activity varying from about room temperature to about 130°C. Organic peroxide classes such as diacyl peroxides and peroxyesters show a strong correlation between structural variation and 10-h half-life temperature activity. Other organic peroxide classes, eg, peroxydicarbonates and monoperox-ycarbonates, show very little change in activity with structural variation. The... 

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