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    Polyethylene film having improved barrier properties and methods of making same
    1.
    发明授权
    Polyethylene film having improved barrier properties and methods of making same 有权
    具有改进的阻挡性能的聚乙烯膜及其制造方法

    公开(公告)号：US07951881B2

    公开(公告)日：2011-05-31

    申请号：US12394651

    申请日：2009-02-27

    申请人： Ashish M. Sukhadia ,  Max P. McDaniel ,  Ted Cymbaluk ,  Rajendra K. Krishnaswamy ,  Lawrence Szmutko

    发明人： Ashish M. Sukhadia ,  Max P. McDaniel ,  Ted Cymbaluk ,  Rajendra K. Krishnaswamy ,  Lawrence Szmutko

    IPC分类号： C08F4/24

    CPC分类号： C08F110/02 ,  C08F4/24 ,  C08F2500/12 ,  C08F2500/07 ,  C08F2500/26

    摘要： A method comprising (a) providing a catalyst comprising chromium and a support having a pore volume of from about 1.7 ml/g to about 3.5 ml/g and a surface area of from about 450 m2/g to about 700 m2/g, (b) oxidizing the catalyst to form an oxidized catalyst, (c) reducing the oxidized catalyst to form an oxidized reduced catalyst, (d) oxidizing the oxidized reduced catalyst to form an activated catalyst, (e) contacting the activated catalyst with an olefin under conditions suitable to form a polyolefin, and (f) recovering the polyolefin, wherein the polyolefin has a density of greater than about 0.960 g/cc and a melt index of from about 1.3 g/10 min. to about 2.8 g/10 min.

    摘要翻译： 一种方法，包括（a）提供包含铬和具有约1.7ml / g至约3.5ml / g的孔体积和约450m 2 / g至约700m 2 / g的表面积的载体的催化剂， b）氧化催化剂以形成氧化的催化剂，（c）还原氧化的催化剂以形成氧化的还原催化剂，（d）将氧化的还原催化剂氧化以形成活化的催化剂，（e）使活化的催化剂与烯烃接触 适于形成聚烯烃的条件，和（f）回收聚烯烃，其中聚烯烃的密度大于约0.960g / cc，熔体指数为约1.3g / 10min。 至约2.8g / 10min。

    Process for producing a polymer composition
    3.
    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

    申请人： Max P. McDaniel ,  Anthony P. Eaton ,  Elizabeth A. Benham ,  Shawn R. Kennedy ,  Ashish M. Sukhadia ,  Rajendra K. Krishnaswamy ,  Kathy S. Collins

    发明人： Max P. McDaniel ,  Anthony P. Eaton ,  Elizabeth A. Benham ,  Shawn R. Kennedy ,  Ashish M. Sukhadia ,  Rajendra K. Krishnaswamy ,  Kathy S. Collins

    IPC分类号： C08L2300

    CPC分类号： C08L23/0815 ,  C08F210/16 ,  C08L23/04 ,  C08L2314/02 ,  C08L2314/06 ,  Y10S526/943 ,  C08L2666/04 ,  C08F210/14 ,  C08F2500/03 ,  C08F2500/12 ,  C08F2500/18 ,  C08F2500/26

    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。