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    Gas phase polymerization process
    1.
    发明授权
    Gas phase polymerization process 失效
    气相聚合法

    公开(公告)号：US06753390B2

    公开(公告)日：2004-06-22

    申请号：US10368786

    申请日：2003-02-18

    申请人： Fred David Ehrman ,  Michael Elroy Muhle ,  Pradeep Pandurang Shirodkar ,  Keith Wesley Trapp

    发明人： Fred David Ehrman ,  Michael Elroy Muhle ,  Pradeep Pandurang Shirodkar ,  Keith Wesley Trapp

    IPC分类号： C08F234

    CPC分类号： C08F10/00 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/65925 ,  C08F210/16 ,  Y10S526/901 ,  Y10S526/905 ,  C08F4/65904 ,  C08F2/34 ,  C08F210/14 ,  C08F2500/07 ,  C08F2500/12 ,  C08F2500/18

    摘要： A gas phase polymerization process for producing a polyolefin composition is described, which includes passing a gaseous stream containing hydrogen gas and one or more monomers, including ethylene monomers, through a reactor that includes a fluidized bed, under reactive conditions, in the presence of a catalyst that includes metallocene, to provide a polyolefin composition, wherein in one embodiment the fluidized bulk density is 60% or more of the settled bulk density (or, a voidage of 40% or less); and wherein the voidage is controlled by a number of factors including, in certain embodiments, (a) the reactor temperature being maintained at 100° C. or below; (b) the molar ratio of hydrogen gas to ethylene introduced into the reactor being 0.015 or below.

    摘要翻译： 描述了一种用于生产聚烯烃组合物的气相聚合方法，其包括在反应条件下，在反应条件下，将含有氢气和一种或多种单体（包括乙烯单体）的气流通过包含流化床的反应器 包括茂金属的催化剂，以提供聚烯烃组合物，其中在一个实施方案中，流化体积密度为沉降堆积密度（或空隙率为40％以下）的60％或更多。 并且其中所述空隙率由许多因素控制，包括在某些实施方案中，（a）反应器温度保持在100℃或更低; （b）引入反应器的氢气与乙烯的摩尔比为0.015以下。

    BRANCHED SATURATED HYDROCARBON POLYMERS AS EXTENSIONAL RHEOLOGY MODIFIERS WITHOUT IMPACTING SHEAR PROPERTIES
    10.
    发明申请
    BRANCHED SATURATED HYDROCARBON POLYMERS AS EXTENSIONAL RHEOLOGY MODIFIERS WITHOUT IMPACTING SHEAR PROPERTIES 有权
    分散式饱和烃聚合物作为不影响剪切性能的扩展流变学改性剂

    公开(公告)号：US20130261264A1

    公开(公告)日：2013-10-03

    申请号：US13855181

    申请日：2013-04-02

    申请人： Johannes Mattieu Soulages ,  David John Lohse ,  Andy Haishung Tsou ,  Thomas Sun ,  Pamela Jean Wright ,  Nikos Hadjichristidis ,  Pradeep Pandurang Shirodkar

    发明人： Johannes Mattieu Soulages ,  David John Lohse ,  Andy Haishung Tsou ,  Thomas Sun ,  Pamela Jean Wright ,  Nikos Hadjichristidis ,  Pradeep Pandurang Shirodkar

    IPC分类号： C08F110/02 ,  C08L23/06

    CPC分类号： C08F110/02 ,  C08L23/06 ,  C08L2205/025 ,  C08L2207/07

    摘要： Provided are blends of branched hydrocarbon comb polymers having tailored branching and molecular weight parameters, with substantially linear polymers. Such blends have been found to have improved extensional rheological properties, while maintaining nearly the viscosity of the substantially linear polymers. The blends of the hydrocarbon comb polymers with the substantially linear polymers thus maintain the extrusion processing characteristics of the linear polymer alone, but have improved extensional flow processability, with strain hardening ratios (SHR) greater than 1. The blends are effective in blown film processing. Also disclosed are related methods for improving extensional flow processability using the branched hydrocarbon comb polymers, as well as the branched hydrocarbon comb polymers themselves, including as a property enhancing additive for such substantially linear polymers.

    摘要翻译： 提供具有定制的支化和分子量参数的支链烃梳聚合物的混合物，具有基本上线性的聚合物。 已发现这种共混物具有改进的拉伸流变性能，同时保持基本上线性聚合物的粘度。 烃梳聚合物与基本上线性的聚合物的共混物因此保持单独的线性聚合物的挤出加工特性，但具有改进的拉伸流动加工性能，应变硬化率（SHR）大于1.该共混物在吹塑薄膜加工中是有效的 。 还公开了使用支链烃梳聚合物以及支链烃梳聚合物本身提高拉伸流加工性的相关方法，包括作为这种基本上线性的聚合物的性能增强添加剂。