Process for producing a polymer composition
    68.
    发明授权
    Process for producing a polymer composition 有权
    聚合物组合物的制造方法

    公开(公告)号:US06388017B1

    公开(公告)日:2002-05-14

    申请号:US09577952

    申请日:2000-05-24

    IPC分类号: C08L2300

    摘要: A process is provided for producing a polymer composition. The process comprises contacting a narrow molecular weight distribution base polymer and a high molecular weight polymer component. The base polymer is an ethylene polymer having a Mw/Mn less than about 5 and a melt flow index from about 0.2 g/10 min to about 20 g/10 min. The high molecular weight polymer component has a molecular weight distribution such that at least a substantial portion of its molecules have a molecular weight of greater than one million. The high molecular weight polymer component being incorporated is in an amount to give about 0.1% to about 10% by weight, based on the total weight of the polymer composition, of the molecules having a molecular weight greater than one million. The polymer composition has a higher bulk density than the base polymer. In addition, when the polymer composition is blown into film, the film has improved clarity over the base polymer.

    摘要翻译: 提供了一种制备聚合物组合物的方法。 该方法包括使窄分子量分布基质聚合物和高分子量聚合物组分接触。 基础聚合物是Mw / Mn小于约5,熔体流动指数为约0.2g / 10min至约20g / 10min的乙烯聚合物。 高分子量聚合物组分的分子量分布使其至少大部分分子的分子量大于100万。 引入的高分子量聚合物组分的量为基于聚合物组合物总重量的约0.1%至约10%重量的分子量大于100万的分子。 聚合物组合物具有比基础聚合物更高的堆积密度。 此外,当将聚合物组合物吹入薄膜时,该薄膜比基础聚合物具有更高的透明度。