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发明公开
CN107828116A ±500kV直流电缆用抗焦烧绝缘材料及其制备方法 有权

±500kV直流电缆用抗焦烧绝缘材料及其制备方法
摘要：
本发明公开了一种高压直流电缆用抗焦烧绝缘材料，可以为±500kV直流电缆用，其原料包括低密度聚乙烯、金属氧化物、抗氧剂、交联剂、助交联剂和抗焦烧剂；低密度聚乙烯的数均分子量为4000-60000，密度为0.91-0.93g/cm3，助交联剂为选自N-环己基硫代邻苯二甲酰亚胺、三烯丙基异氰脲酸酯、三羟甲基丙烷三甲基丙烯酸酯中的一种或多种的组合，抗焦烧剂为选自2-苯并噻唑基-N-吗啉基硫醚、N-苯基-N-〔(三氯甲基)硫代〕-苯磺酰胺、吗啉-4-二硫代甲酸-4-吗啉酯中的一种或多种的组合；本发明的绝缘材料在具备90℃以上的耐温等级的同时还具备抗焦烧功能。
摘要（英）：

The invention discloses a scorching-resistant insulating material for a high-voltage direct-current cable. The scorching-resistant insulating material can be used for the +/-500kV direct-current cableand comprises low density polyethylene, metal oxide, antioxidants, cross-linkers, assistant cross-linkers and scorching-resistant agents. The number-average molecular weight of the low density polyethylene is 4000-60000, the density of the low density polyethylene is 0.91-0.93g/cm<3>, the assistant cross-linkers are selected from combination of one or more of N-cyclohexyl sulfo-phthalimide, triallyl isocyanurate and trimethylolpropane trimethylacrylate, and the scorching-resistant agents are selected from combination of one or more of 2-benzothiazolyl-N-morpholinyl sulfur ether, N-phenyl-N-[(trichloromethyl) sulfo]-benzene sulfonamide and morpholine-4-dithioformate-4-morpholine ester. The insulating material has the temperature resistance level of 90 DEG C or more, and further has a scorching-resistant function.

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