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    • 10. 发明公开
    • LIQUID SILICONE RUBBER COMPOSITION FOR HIGH-VOLTAGE ELECTRICAL INSULATION COMPONENT
    • FLÜSSIGESILIKONKAUTSCHUK-ZUSAMMENSETZUNGFÜREINE ELEKTRISCHE HOCHSPANNUNGS-ISOLIERUNGSKOMPONENTE
    • EP2623563A1
    • 2013-08-07
    • EP11829153.3
    • 2011-09-28
    • Momentive Performance Materials Japan LLC
    • MATSUKURA ToshihikoIIJIMA Hiroyoshi
    • C08L83/07C08K5/3472C08K9/06C08L83/05
    • C09D119/00C08G77/12C08G77/20C08K5/3472C08K9/06C08L83/04C08L83/00
    • Provided is a silicone rubber composition to form a high voltage insulation cured material, having tracking resistance, providing a low tension set and an excellent mechanical strength such as tensile strength, and having a good tracking resistance. The silicone rubber composition contains:(A) 100 parts by weight of a dimethylpolysiloxane being sequestered at both ends of the molecular chain thereof by dimethylvinylsiloxy group; (B) 5 to 100 parts by weight of a dry silica, being treated by a vinyl group-containing organosilicon compound and having a specific surface area of 50 m 2 /g or more; (C) 5 to 100 parts by weight of a copolymer of dimethylsiloxane and methylhydrogen siloxane; (D) platinum or a platinum compound as a curing agent in an amount of 1 to 1,000 ppm as platinum atom to the total amount of component (A) and component (C); and (E) triazole or a derivative of triazole, in an amount of 1 to 10,000 ppm to the total amount of (A) component and (C) component, wherein the amount of vinyl group derived from the component (B) is 40% by mole or more to the total amount of vinyl group in the composition, and the ratio of the molar number of hydrogen atoms binding to the silicon atoms in the composition relative to the molar number of alkenyl group binding to the silicon atoms is in a range of 3.0 to 10.0.
    • 本发明提供一种形成高电压绝缘固化材料的硅橡胶组合物,具有跟踪电阻,提供低张力组合和优异的机械强度,例如拉伸强度,并且具有良好的跟踪电阻。 硅橡胶组合物含有:(A)通过二甲基乙烯基甲硅烷氧基在其分子链的两端螯合100重量份的二甲基聚硅氧烷; (B)5〜100重量份的干二氧化硅,用含乙烯基的有机硅化合物处理,比表面积为50m 2 / g以上; (C)5〜100重量份的二甲基硅氧烷与甲基氢硅氧烷的共聚物; (D)铂或铂化合物作为铂原子相对于组分(A)和组分(C)的总量为1-10ppm的固化剂; (A)成分和(C)成分的总量为1〜10,000ppm的量的(E)三唑或三唑衍生物,其中,来自(B)成分的乙烯基的量为40质量% 摩尔数以上,组合物中结合硅原子的氢原子的摩尔数相对于与硅原子结合的烯基的摩尔数的比例在乙烯基的总量的范围内。 为3.0〜10.0。