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    • 6. 发明申请
    • FLAME RETARDANT THERMOPLASTIC COMPOSITIONS HAVING EMI SHIELDING
    • 具有EMI屏蔽功能的阻燃热塑性组合物
    • US20070105994A1
    • 2007-05-10
    • US11619686
    • 2007-01-04
    • Gang LiThomas EbelingMonica MaruganZhaohui QuSrinivas SiripurapuDavid Zou
    • Gang LiThomas EbelingMonica MaruganZhaohui QuSrinivas SiripurapuDavid Zou
    • C08K5/49
    • C08L69/00C08K5/523C08K7/06C08L51/00C08L55/02C08L83/10C08L2666/02C08L83/00
    • A flame retardant thermoplastic composition having excellent physical properties that includes 20 to 90 wt. % of a polycarbonate resin; from 1 to 35 wt. % of an impact modifier; from 0.5 to 30 wt. % of a polysiloxane-polycarbonate copolymer including from 8 to 30 wt. % polydimethylsiloxane units or the equivalent molar amount of other diorganosiloxane units; from 0.5 to 20 wt. % of a phosphorus-containing flame retardant, and from 3 to 30 wt. % of metal fiber, each based on the total combined weight of the thermoplastic composition, exclusive of any filler. In one embodiment, a molded sample of the thermoplastic composition having a thickness of 3.0 mm (±10%) has an EMI shielding of at least 20 dB. In addition, a molded sample of the thermoplastic composition is capable of achieving UL94 V0 or V1 rating at a thickness of 1.5 mm (±10%). The compositions are useful in forming flame retardant articles having EMI shielding characteristics.
    • 具有优异物理性能的阻燃热塑性组合物,其包含20〜90重量% %的聚碳酸酯树脂; 1至35wt。 %抗冲改性剂; 0.5至30wt。 %的聚硅氧烷 - 聚碳酸酯共聚物,其包含8至30重量% %的聚二甲基硅氧烷单元或等摩尔量的其它二有机硅氧烷单元; 0.5至20wt。 %的含磷阻燃剂,和3〜30wt。 %的金属纤维,各自基于热塑性组合物的总组合重量,不包括任何填料。 在一个实施方案中,厚度为3.0mm(±10%)的热塑性组合物的模塑样品具有至少20dB的EMI屏蔽。 此外,热塑性组合物的模塑样品能够达到1.5mm(±10%)厚度的UL94V0或V1等级。 该组合物可用于形成具有EMI屏蔽特性的阻燃制品。