Reactor wall coating and processes
    4.
    发明授权
    Reactor wall coating and processes 有权
    反应器壁涂和工艺

    公开(公告)号:US06870023B2

    公开(公告)日:2005-03-22

    申请号:US10651135

    申请日:2003-08-28

    摘要: Reactor wall coatings for polymerization reactors and processes for forming such coatings are disclosed. The reactor wall coatings can have a thickness of at least 100 μm and a molecular weight distribution including a major peak having one or more of an Mw/Mn ratio of less than 10; an Mz/Mw ratio of less than 7; and a maximum value of d(wt %)/d(log MW) at less than 25,000 daltons in a plot of d(wt %)/d(log MW), where MW is the molecular weight in daltons. The reactor wall coatings can be formed in-situ during polymerization, on reactor walls initially free of a reactor wall coating, or having a pre-existing reactor wall coating.

    摘要翻译: 公开了用于聚合反应器的反应器壁涂层和用于形成这种涂层的方法。 反应器壁涂层可以具有至少100μm的厚度,并且分子量分布包括具有小于10的Mw / Mn比中的一个或多个的主峰; Mz / Mw比小于7; d(重量%)/ d(对数MW)的曲线图中d(重量%)/ d(logMW)的最大值小于25,000道尔顿,其中MW是道尔顿中的分子量。 反应器壁涂层可以在聚合期间原位形成,最初不含反应器壁涂层的反应器壁上,或具有预先存在的反应器壁涂层。

    High density polyethylene and articles made therefrom
    5.
    发明授权
    High density polyethylene and articles made therefrom 有权
    高密度聚乙烯及其制品

    公开(公告)号:US07855253B2

    公开(公告)日:2010-12-21

    申请号:US12490763

    申请日:2009-06-24

    IPC分类号: C08L23/00 C08L23/04

    摘要: Articles such as, for example, pipes or bottles, prepared from multimodal polyethylenes possessing a density from 0.940 to 0.965 g/cm3, and an I21 from 4 to 20 dg/min, and comprising a low molecular weight ethylene copolymer having a weight average molecular weight from 5,000 amu to 50,000 amu; and a high molecular weight ethylene copolymer having a weight average molecular weight from 60,000 amu to 800,000 amu, both components having a desirable balance of short chain branching making the multimodal polyethylene suitable for films, pipes, rotomolding applications and blow molding applications.

    摘要翻译: 由密度为0.940〜0.965g / cm 3的多峰聚乙烯制备的制品,例如管道或瓶子,I21为4至20dg / min,并且包含具有重均分子量的低分子量乙烯共聚物 重量从5,000 amu到50,000 amu; 和重均分子量为6万am至80万amu的高分子量乙烯共聚物,两种组分具有短链分支的理想平衡,使多峰聚乙烯适用于薄膜,管道,滚塑应用和吹塑应用。

    HIGH DENSITY POLYETHYLENE AND ARTICLES MADE THEREFROM
    8.
    发明申请
    HIGH DENSITY POLYETHYLENE AND ARTICLES MADE THEREFROM 有权
    高密度聚乙烯和其制品

    公开(公告)号:US20090258995A1

    公开(公告)日:2009-10-15

    申请号:US12490763

    申请日:2009-06-24

    IPC分类号: C08L23/04

    摘要: Articles such as, for example, pipes or bottles, prepared from multimodal polyethylenes possessing a density from 0.940 to 0.965 g/cm3, and an I21 from 4 to 20 dg/min, and comprising a low molecular weight ethylene copolymer having a weight average molecular weight from 5,000 amu to 50,000 amu; and a high molecular weight ethylene copolymer having a weight average molecular weight from 60,000 amu to 800,000 amu, both components having a desirable balance of short chain branching making the multimodal polyethylene suitable for films, pipes, rotomolding applications and blow molding applications.

    摘要翻译: 由密度为0.940〜0.965g / cm 3的多峰聚乙烯制备的制品,例如管道或瓶子,I21为4至20dg / min,并且包含具有重均分子量的低分子量乙烯共聚物 重量从5,000 amu到50,000 amu; 和重均分子量为6万am至80万amu的高分子量乙烯共聚物,两种组分具有短链分支的理想平衡,使多峰聚乙烯适用于薄膜,管道,滚塑应用和吹塑应用。

    Method of reducing gels in polyolefins
    10.
    发明授权
    Method of reducing gels in polyolefins 有权
    降低聚烯烃凝胶的方法

    公开(公告)号:US07393916B2

    公开(公告)日:2008-07-01

    申请号:US11264567

    申请日:2005-11-01

    IPC分类号: C08F6/00

    摘要: A process of producing a polyolefin, in one embodiment a polyethylene, and in a preferred embodiment a bimodal polyethylene comprising a high molecular weight component and a low molecular weight component, the process comprising providing a polyolefin having an I21 value of from 2 to 100 g/10 min and a density of from 0.91 to 0.97 g/cm3; followed by forming a melt of the polyolefin and passing the polyolefin through one or more active screen filter(s) having a mesh size of from 70 to 200 micron at a mass flux of from 5 to 100 lbs/hr/square inch; and isolating the polyolefin having passed through the screen filter.

    摘要翻译: 一种制备聚烯烃的方法,在一个实施方案中为聚乙烯,在优选实施方案中为包含高分子量组分和低分子量组分的双峰聚乙烯,该方法包括提供具有I 21 >值为2至100g / 10分钟,密度为0.91至0.97g / cm 3; 随后形成聚烯烃的熔体并使聚烯烃通过一个或多个筛孔尺寸为70至200微米的活性筛网过滤器,质量通量为5至100磅/小时/平方英寸; 并分离通过筛网过滤器的聚烯烃。