A novel dialkyl peroxide is disclosed which is represented by the formula:
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.
本发明公开了一种新型二烷基过
氧化物,其
化学式为
其中 R₁ 和 R₂ 各自代表
氢原子或
甲基,R₃ 代表 1 至 5 个
碳原子的烷基,X 代表 1 至 3 个
碳原子的亚烷基,-C(O)-、-CH₂-(O-CH₂-CHR₄)m-OC(O)-[其中 R₄ 代表
氢原子或
甲基,m 代表 0 至 10 之间的整数]、或-C(O)-(O-CH₂-CHR₅)n-OC(O)-(其中 R₅ 代表
氢原子或
甲基,n 代表 1 至 10 范围内的整数)。一种用于生产交联
乙烯聚合物的组合物包括过
氧化二烷基和
乙烯聚合物。一种电气特性(交流击穿强度)优异的电力电缆包括导体和沉积在导体外围的
树脂层,该
树脂层由通过使用过
氧化二烷基作为
交联剂而获得的交联
乙烯聚合物形成。