"ate, sodium persulfate, etc., organic peroxides such as t-butylperoxymaleic acid, succinic acid peroxide, t-butylhydroperoxide, etc., and azobis compounds such as 2,2'-azobis-(2-N-benzylamidino)propane hydrochloride, 2,2'-azobis-[2-(N-2-hydroxyethyl)amidino]propane, 2,2'-azobis-(2-methyl-N-hydroxyethyl)propionamide, etc." . . . .