| 摘要 |
PURPOSE:The titled composition useful as an electrical insulating material for electric wire and cable, having especially improved heat resistance, obtained by adding a specific amount of a specified compound as an antioxidant to low- density polyethylene, crosslinking it with an organic peroxide. CONSTITUTION:100pts.wt. low-density polyethylene is blended with a combination of 0.2-0.8pt.wt. 4,4'-thiobis(3-methyl-6-t-butylphenol) and 0.5-3pts.wt. bis[2- methyl-4-(3-n-alkylthio-propionyloxy)-5-t-butylphenyl]sulfide, and the blend is mixed with an organic peroxide (e.g., 7-dicumyl peroxide, etc.) as a crosslinking agent, and, if necessary, a lubricant, colorant, and a crosslinking promotor. The blend is uniformly kneaded, and crosslinked, to give the desired crosslinked polyethylene. |
