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Fluorine and silicone oil

溶胀?裂解?这对氟硅油来说都不算事

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首页 >  技术干货 >  溶胀?裂解?这对氟硅油来说都不算事
发布时间 : 2018/12/18 | 文章来源 : NUSIL | 作者 : 易供应
    • 这对氟硅油来说都不算事
    • Fluorosilicones 氟硅油

    NuSil提供全系列氟硅油,包括HCR,LSR,粘合剂,密封剂和涂料。

    氟硅氧烷可耐受诸如喷气燃料,汽油或原油之类的碳氢化合物,并且可在宽温度范围内操作。
    该粘合剂是快速固化的单组分半透明RTV 有机硅,具有优异的弹性。

    它们可用于密封和粘接应用,不需要使用底漆。氟硅氧烷粘合剂保护和粘合通常暴露于溶剂,汽油或航空燃料的硬件组件
    硅氧烷涂料为分散在乙酸叔丁酯中的单组分RTV硅氧烷提供了便利

    NuSil公司氟硅氧烷涂层设计用于喷涂和浸渍成薄的弹性体薄膜。

    它们与大多数表面积极结合应用可包括:涂层,密封和粘合,其中需要耐溶剂和/或燃料。
    氟硅氧烷HCR是预催化的过氧化物固化体系。LSR是两部分铂固化氟硅氧烷。
    两者都是热固化的,主要用于挤出或模塑诸如将暴露于碳氢化合物的垫圈之类的部件。

    NuSil offers a full line of fluorosilicones including HCRs, LSRs,

    adhesives, sealants and coatings. Fluorosilicones are resistant
    to hydrocarbons such as jet fuel, gasoline or crude oil and
    operate in a broad temperature range.
    The adhesives are fast-cure, one-part, translucent RTV
    silicones possessing excellent elastomeric properties. They
    are useful for sealing and bonding applications and don’t
    require the use of a primer. The fluorosilicone adhesives
    protect and bond hardware components that are commonly
    exposed to solvents, gasoline or aviation fuels.
    Fluorosilicone coatings offer the convenience of a one-part,
    RTV silicone dispersed in tert butyl acetate. NuSil’s
    fluorosilicone coatings are designed for spraying and dip
    casting into thin elastomeric films. They bond aggressively to
    most surfaces. Applications may include: coating, sealing, and
    bonding where solvent and/or fuel resistance is necessary.
    The fluorosilicone HCR is a pre-catalyzed peroxide cure
    system. The LSR is a two part, platinum cure fluorosilicone.
    Both are heat cured and are used primarily for extruding or
    molding parts such as gaskets that will be exposed to hydrocarbons.

    氟硅氧烷的独特性能为需要广泛的操作温度,耐燃料性和长期可靠性的产品提供了解决方案

    传统的二甲基硅氧烷不能在氟硅氧烷可以承受的恶劣环境中存活。
    为了证明氟硅氧烷的有效性,NuSil测试了标准二甲基硅氧烷与氟硅氧烷相比随时间的膨胀百分比。

    测量膨胀百分比(参考ASTM D 471),测量基于比重的体积变化,FS3-3730,FS-3775,FS-3511和FS-3781。
    暴露于燃料之前和之后评估样品差异

    质量变化百分比越大意味着质量变化硅胶吸收更多溶剂。

    将硅氧烷在JP8 Jet Fuel中在环境条件下浸泡3天。

    3天的时间内每24小时测量并报告质量百分比变化

    The unique properties of fluorosilicones provide a solution for
    products that need broad operating temperatures, fuel resistance
    and long-term reliability. Conventional dimethyl silicones cannot
    survive the harsh environments that fluorosilicones can endure.
    To demonstrate the effectiveness of fluorosilicones, NuSil tested
    standard dimethyl silicone in comparison to fluorosilicones for
    percent swell over time. Percent Swell (Ref ASTM D 471),
    measures changes in volume based on specific gravity,
    FS3-3730, FS-3775, FS-3511 and FS-3781 were tested. The
    differences in the samples were evaluated before and after
    exposure to the fuel. A higher percent change in mass means the
    silicone is absorbing more solvent. The silicones were soaked in
    JP8 Jet Fuel for 3 days at ambient conditions. Percent change in
    mass was measured and reported every 24 hours over a 3 day
    period.

    研究结果表明,对于所有测试产品,膨胀的最大变化百分比在最初的24小时内。
    变化百分比范围从最高的FS-3775为19%,最低FS-3511为4.7%在72小时的早期峰值之后,
    硅树脂保持相当一致,使得更容易弄清楚期望什么以及材料在该环境中如何长时间运行。

    如上所示,FS-3511和FS3-3730经过优化,可实现最小膨胀,最大质量百分比变化为5-6%。

    然而,FS-3775 经过优化,可在高温下获得更好的性能,因此其最大质量百分比变化略高于20%

    The study results show that the largest percent change in swell is
    within the first 24 hours for all products tested. The percent
    change ranges from 19% for FS-3775 at the highest and 4.7% for
    FS-3511 at the lowest. After that early peak, at 72 hours, the
    silicone remains fairly consistent, making it easier to figure out
    what to expect and how the material will perform in that
    environment for an extended period of time. As shown above,
    FS-3511 and FS3-3730 are optimized for minimum swell with a
    maximum percent change in mass of 5-6%. FS-3775, however, is
    optimized for better performance in elevated temperatures, thus
    its maximum percent mass change is slightly higher at 20%.

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