Method and preparation of stable bitumen polymer compositions
    1.
    发明授权
    Method and preparation of stable bitumen polymer compositions 失效
    稳定的沥青聚合物组合物的方法和制备

    公开(公告)号:US06469075B1

    公开(公告)日:2002-10-22

    申请号:US09712671

    申请日:2000-11-14

    IPC分类号: E08L9500

    摘要: The present invention provides a method for preparing an asphalt and thermoplastic elastomer composition. The process comprises heating an asphalt cut in a stirred tank to a temperature sufficient to allow the stirring of the asphalt in the tank. A thermoplastic elastomer or rubber is added to the asphalt while continuing to stir the asphalt. The mixture is stirred at a speed and for a period of time sufficient to increase the distribution of the elastomer into the asphalt. The stirring speed is reduced and the temperature is increased to add crosslinking agents to the tank. Stirring is continued for a period of time sufficient to improve the distribution of the crosslinking agent dispersion in the asphalt. Crosslinking agents comprise zinc 2-mercaptobenzothiole and elemental sulfur in a ratio of zinc 2-mercaptobenzothiazole to sulfur of 2.0/1.0. Useful concentrates are possible using this method while avoiding gel formation.

    摘要翻译: 本发明提供一种制备沥青和热塑性弹性体组合物的方法。 该方法包括将在搅拌槽中切割的沥青加热到足以允许在罐中搅拌沥青的温度。 在沥青中继续搅拌沥青时,加入热塑性弹性体或橡胶。 将混合物以足以增加弹性体分配到沥青中的速度搅拌一段时间。 搅拌速度降低,温度升高,向罐中加入交联剂。 搅拌持续一段时间,足以改善沥青中交联剂分散体的分布。 交联剂包括2-巯基苯并硫代锌和元素硫,其中2-巯基苯并噻唑锌与硫的比例为2.0 / 1.0。 使用这种方法可以使用有用的浓缩物,同时避免凝胶形成。