Phenylene substituted polymeric dialkyl peroxides

A method for making a phenylene substituted dialkyl peroxide comprising:

• etherifying a diol selected from 1,4-bis(hydroxyisopropyl)benzene and 1,3-bis(hydroxyisopropyl)benzene with a dihydroperoxide selected from 2,5-dimethyl-2,5-dihydroperoxyhexane, 2,5-dimethyl-2,5-dihydroperoxyhexyne-3, and 3,6-dimethyl-3,6-dihydroperoxyoctane, said diol and dihydroperoxide being present in co-reactive amounts and under conditions which permit etherification therebetween, and recovering the organic peroxide reaction product.