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    • 1. 发明申请
    • Insulating foam composition
    • 绝缘泡沫组合物
    • US20080255261A1
    • 2008-10-16
    • US12150647
    • 2008-04-30
    • Dharmini Kshama Josephine MothaAchim HesseJames Elliott Robinson
    • Dharmini Kshama Josephine MothaAchim HesseJames Elliott Robinson
    • C08L23/12
    • C08J9/0061C08J2323/10C08J2423/00C08L2314/06C08L2666/02C09J123/12H01B3/441
    • Insulating foam composition for insulation on communication cables, contains 20-95 wt % of an unmodified propylene polymer, having a melt index of 0.1 to 10 g/10 min at 230° C./2.16 kg; and 5-80 wt % of a modified propylene polymer, with a propylene content of up to 100 wt %, and a melt index of 0.05 to 10 g/10 min at 230° C./2.16 kg. The unmodified propylene polymer is a propylene homopolymer; a propylene copolymer of propylene and ethylene or an α-olefin; a polyolefin mixture containing a crystalline copolymer of propylene and ethylene or an α-olefin, and an elastic copolymer containing ethylene and propylene or an α-olefin; or an amorphous, non-isotactic propylene polymer such as a propylene homopolymer, a propylene copolymer containing propylene and an α-olefin. The modified propylene polymer is a polypropylene modified by reaction with a bismaleimido compound, ionizing radiation, or a peroxide.
    • 在通信电缆上绝缘的绝缘泡沫组合物含有20-95wt%的未改性丙烯聚合物,在230℃/ 2.16kg下熔体指数为0.1-10g / 10min; 和5-80wt%的丙烯含量高达100wt%的改性丙烯聚合物,在230℃/ 2.16kg下的熔体指数为0.05-10g / 10min。 未改性的丙烯聚合物是丙烯均聚物; 丙烯和乙烯或α-烯烃的丙烯共聚物; 含有丙烯和乙烯或α-烯烃的结晶共聚物的聚烯烃混合物和含有乙烯和丙烯或α-烯烃的弹性共聚物; 或无定形非全同立构丙烯聚合物如丙烯均聚物,含有丙烯和α-烯烃的丙烯共聚物。 改性丙烯聚合物是通过与双马来酰亚胺化合物,电离辐射或过氧化物反应而改性的聚丙烯。