CROSSLINKED POLYETHYLENE COMPOSITION HAVING IMPROVED PROCESSABILITY
    6.
    发明申请
    CROSSLINKED POLYETHYLENE COMPOSITION HAVING IMPROVED PROCESSABILITY 有权
    交联聚乙烯组合物具有改进的可加工性

    公开(公告)号:US20150291774A1

    公开(公告)日:2015-10-15

    申请号:US14405220

    申请日:2012-06-04

    IPC分类号: C08K5/36 C08K5/3492 C08K5/14

    摘要: Disclosed in the present invention is a crosslinked polyethylene composition having improved processability comprises: 100 parts by weight of polyethylene, 0.03-5 parts by weight of crosslinking agent, 0.03-5 parts by weight of crosslinking promoter, and 0.01-1.5 parts by weight of free radical inhibitor, wherein the polyethylene is a copolymer and/or homopolymer containing at least 90 wt. % of vinyl and at least one C3-C8 α-alkenyl, and has a density in the range of 0.920-0.970 g/cm3, a melt index in the range of 2.5-17.5 g/10 min; the crosslinking agent is a peroxide crosslinking agent; the crosslinking promoter is an organic substance containing maleimido, (meth)acrylate group, and/or allyl, and/or a polymer containing more than 50% of vinyl; the free radical inhibitor is an organic antioxidant, a quinhydrone and/or a substituted quinhydrone. The crosslinked polyethylene composition of the present invention has a crosslinking efficiency index of more than 1,100 Nm/g and a δ torque value of more than 10 Nm at the temperature of 200° C., a significantly higher safety process temperature and a significantly improved crosslinking retardation time compared to the conventional crosslinked polyethylene composition, which make it especially be suitable for the production of rotational molding articles.

    摘要翻译: 在本发明中公开的是具有改进的加工性的交联聚乙烯组合物,包括:100重量份的聚乙烯,0.03-5重量份的交联剂,0.03-5重量份的交联促进剂和0.01-1.5重量份的 自由基抑制剂,其中聚乙烯是共聚物和/或均聚物,其含有至少90wt。 %的乙烯基和至少一个C 3 -C 8α-烯基,其密度在0.920-0.970g / cm 3范围内,熔体指数在2.5-17.5g / 10min的范围内; 交联剂是过氧化物交联剂; 交联促进剂是含有马来酰亚胺基,(甲基)丙烯酸酯基和/或烯丙基的有机物,和/或含有50%以上乙烯基的聚合物; 自由基抑制剂是有机抗氧化剂,醌氢醌和/或取代的氢醌。 本发明的交联聚乙烯组合物在200℃的温度下具有大于1100Nm 3 / g的交联效率指数和大于10Nm的δ扭矩值,显着更高的安全性工艺温度和明显改善的交联 延迟时间与传统的交联聚乙烯组合物相比,特别适用于生产旋转模塑制品。