Alkylideneperoxides,method for preparing same and vulcanizable compositions obtained therefrom

Abstract

Abstract A vulcanizable composition contains an olefin copolymer or terpolymer, a reinforcing filler and an alkylidene peroxide of the formulae <FORM:1122579/C3/1> <FORM:1122579/C3/2> <FORM:1122579/C3/3> <FORM:1122579/C3/4> wherein R and R1 are each H, alkyl, aryl or aralkyl groups, R11 and R111 are each tertiary alkyl or tertiary aralkyl groups, R1111 is a hydrogen atom or an alkyl radical, R5 is an alkylene, arylene or aralkylene radical and R6 is the same as R11 or R111, R11 and R111 are different and n is 0 or 1. The peroxide should be present in an amount from 0.1 to 10 parts by weight, per 100 parts of copolymer or terpolymer. Also, vulcanized articles obtained from the said compositions by heating the composition to a temperature higher than the decomposition temperature of the alkylidene peroxide. Examples are given in which ethylene-propylene copolymers are vulcanized.ALSO:Alkylidene peroxides of the general formulae <FORM:1122579/C2/1> <FORM:1122579/C2/2> <FORM:1122579/C2/3> <FORM:1122579/C2/4> wherein R and R1 are each H, alkyl, aryl or aralkyl groups, R11 and R111 are each tertiary alkyl or tertiary aralkyl groups, R1111 is a hydrogen atom or an alkyl radical, R5 is an alkylene, arylene or aralkylene radical and R6 is the same as R11 or R111, R11 and R111 are different and n is 0 or 1 are prepared in the case of the first three types by transperoxidation of an alkylidene peroxide of the formulae <FORM:1122579/C2/5> <FORM:1122579/C2/6> with a hydroperoxide of the formula R111OOH which is less volatile than the hydroperoxide R11OOH from which the radical -OOR11 is derived, in the absence of catalysts generally at from 35 DEG to 110 DEG C. by continuously removing by distillation the hydroperoxide R11OOH released generally until 1 mol. of hydroperoxide R11OOH per 1 mol. of starting alkylidene peroxide has been eliminated or until the R11OOH hydroperoxide has been completely eliminated; and in the case of the fourth type by transperoxidation generally of 2 mols of an alkylidene peroxide of the formula <FORM:1122579/C2/7> with 1 mol. of a dihydroperoxide of the formula <FORM:1122579/C2/8> This invention also comprises the compounds of the formulae <FORM:1122579/C2/9> <FORM:1122579/C2/100> <FORM:1122579/C2/111> per se: Examples are given for the production of the compounds. They are useful as vulcanizing agents.

Inventors

• 👤 Carlo Buttar
• 👤 Emilio Martini

Bibliographic Details