Abstract: I. A novel class of compounds X.sub.n --R.sub.p --Y.sub.m where R is a 2-4 valence aliphatic, cycloaliphatic or aromatic radical, X is an acylating function; Y is a peroxy containing group and n and m are each equal to 1-2 and p is at least 1.Ii. a novel class of polymers [A.sub.n -(R-D.sub.n).sub.n ].sub.v -P.sub.w -Z where A is a peroxy containing group; R is a 2-4 valence aliphatic, cycloaliphatic or aromatic radical, P is a polyvalent polymeric residue; D is a carbonyl containing connecting group; Z is H, OH, NH.sub.2, NHR.sub.2, SH or R.sub.2 O group; v and w are each equal to 1-100; and n is equal to 1-2.Iii. polymers II are useful with vinyl monomers in the formation of block and graft polymers.Iv. peroxides having an acylating function are prepared by reacting at 0.degree.-80.degree. C an organic peroxide having an hydroxyl or carboxyl group with a defined acylating reactant.V.

Abstract: A new class of compounds: R--W--R' were R and R' are identical oxy radicals containing peroxide functions such as dialkyl or diaralkyl peroxide, peroxyketal, peroxyester, or monoperoxycarbonate, and W is a carbonyl group, or carbonyl containing group, or an alkylidene or aralkylidene group, or a phosphorus containing group.ExamplesDi[1,3-dimethyl-3-(t-butylperoxy)butyl]carbonate;Di[1,3-dimethyl-3-(n-butoxycarbonylperoxy)butyl]carbonate;2,2-Bis[3,3-di(t-butylperoxy)butoxy]propane;Di[1,3-dimethyl-3-(t-butylperoxy)butyl]ethyl phosphate.They are free radical affording compounds useful in crosslinking of polyolefins and unsaturated polymers, and for the polymerization of vinyl monomers and diolefinic monomers.

Abstract: A new class of compounds: R-W-R' where R and R' are identical oxy radicals containing peroxide functions such as dialkyl or diaralkyl peroxide, proxyketal, peroxyester, or monoperoxycarbonate, and W is a carbonyl group, or carbonyl containing group, or an alkylidene or aralkylidene group, or a phosphorous containing group.Examples:Di[1,3-dimethyl-3-(t-butylperoxy)butyl]carbonate;Di[1,3-dimethyl-3-(n-butoxycarbonylperoxy)butyl]carbonate;2,2-Bis[3,3-di(t-butylperoxy)butyoxy]propane;Di[1,3-dimethyl3-(t-butylperoxy)butyl]ethyl phosphate.They are free radical affording compounds useful in crosslinking of polyolefins and unsaturated polymers, and for the polymerization of vinyl monomers and diolefinic monomers.

Abstract: A novel class of compounds X.sub.n --R.sub.p --Ym where R is a 2-4 valent aliphatic, cycloaliphatic or aromatic radical; X is an acylating function; Y is a peroxy containing group and n and m are each equal to 1-2 and p is at least 1.