Composition for cross-linking of ethylene-polymer, method for cross-linking ethylene-polymer, and cross-linkable composition

摘要

A composition for cross-linking of ethylene·polymer comprises 2,4-diphenyl-4-methyl-1-pentene and at least one peroxide selected from the group consisting of [1] peroxides represented by the formula (I): (wherein R¹ stands for one member selected from the group consisting of alkyl groups, aryl groups, and alkyl-substituted aryl groups having 1 to 9 carbon atoms, R² for one member selected from the group consisting of phenylene group, ethylene group, -C≡C-, and alkyl groups, aryl groups, and alkyl-substituted aryl groups having 1 to 9 carbon atoms, and n for 1 or 2) and [2] peroxides represented by the formula (II): (wherein two R³′s independently stand for one member selected from the group consisting of alkyl groups, aryl groups, and alkyl-substituted aryl groups of 1 to 9 carbon atoms or jointly stand for an ethylene group, R⁴ and R⁵ independently stand for a linear or branched alkyl group of 1 to 6 carbon atoms or -(CH₂)_mC(O)OR⁶ [wherein R⁶ stands for an alkyl group of 1 to 4 carbon atoms and m for an integer in the range of 1 to 3] or jointly for a cyclohexane ring or a cyclododecane ring unsubstituted or substituted with 1 to 3 alkyl groups of 1 to 4 carbon atoms); a method for cross-linking an ethylene-polymer by the use of the composition mentioned above, a method for cross-linking an ethylene·polymer using the composition and a cross-linkable composition comprises an ethylene·polymer and the compositon.