Dialkyl peroxide, cross-linking composition containing the same, method for cross-linking, and electric power cable.

摘要

A novel dialkyl peroxide is disclosed which is represented by the formula: <CHEM> wherein R1 and R2 independently stand for a hydrogen atom or a methyl group, R3 stands for an alkyl group of 1 to 5 carbon atoms, X stands for an alkylene group of 1 to 3 carbon atoms, -C(O)-, -CH2-(O-CH2-CHR4)m-OC(O)- [wherein R4 stands for a hydrogen atom or a methyl group and m stands for an integer in the range of 0 to 10], or -C(O)-(O-CH2-CHR5)n-OC(O)- (wherein R5 stands for a hydrogen atom or a methyl group and n stands for an integer in the range of 1 to 10). A composition for the production of a cross-linked ethylene type polymer comprises the dialkyl peroxide and an ethylene type polymer. An electric power cable excelling in electrical characteristics (AC breakdown strength) comprises a conductor and a resin layer deposited on the periphery of the conductor and formed of a cross-linked ethylene type polymer obtained by using the dialkyl peroxide as a cross-linking agent. <IMAGE>