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    Polyethylene Resin Compositions Having Low Mi And High Melt Strengh
    1.
    发明申请
    Polyethylene Resin Compositions Having Low Mi And High Melt Strengh 审中-公开
    具有低密度和高熔体强度的聚乙烯树脂组合物

    公开(公告)号：US20080125547A1

    公开(公告)日：2008-05-29

    申请号：US11816970

    申请日：2006-03-03

    申请人： Kurt Swogger ,  Pak-Wing S. Chum ,  Thomas Oswald ,  Stephane Costeux

    发明人： Kurt Swogger ,  Pak-Wing S. Chum ,  Thomas Oswald ,  Stephane Costeux

    IPC分类号： C08L23/00

    CPC分类号： C08L23/04 ,  C08L2205/02 ,  C08L2666/06 ,  C08F210/16 ,  C08F210/14 ,  C08F2500/04 ,  C08F2500/11 ,  C08F2500/12

    摘要： Ethylene polymer compositions comprising a high molecular weight high density polyethylene resin and a low density polyethylene resin are disclosed, where the polymer composition has a comparatively high melt strength for a given melt index. The compositions comprise from 25 to 99 percent by weight of the composition of a linear or substantially linear polyethylene polymer having a density of at least about 0.90 g/cc, and an I21 of less than about 20; and from 1 to 25 percent by weight of the composition of a high pressure low density type polyethylene resin having a melt index (I2) less than about 5, a molecular weight distribution greater than about 10, a Mw_abs/Mw_gpc ratio (“Gr”) of at least 2.7, and a melt strength at 190° C. greater than 19.0−12.6*log10(Mi). The compositions of the present invention are particularly well suited for blown film and thermoforming applications.

    摘要翻译： 公开了包含高分子量高密度聚乙烯树脂和低密度聚乙烯树脂的乙烯聚合物组合物，其中聚合物组合物对于给定的熔体指数具有相对较高的熔体强度。 该组合物包含25至99重量％的组合物，其密度为至少约0.90g / cc，I21小于约20的直链或基本上线性的聚乙烯聚合物; 和组合物的1至25重量％的熔体指数（I 2）小于约5，分子量分布大于约10，Mw_abs / Mw_gpc比（“Gr”）的高压低密度型聚乙烯树脂， ）至少为2.7，熔体强度为190℃，大于19.0-12.6 * log10（Mi）。 本发明的组合物特别适用于吹塑薄膜和热成型应用。

    Cast stretch film of interpolymer compositions
    5.
    发明授权
    Cast stretch film of interpolymer compositions 有权
    互聚物组合物的拉伸膜

    公开(公告)号：US06812289B2

    公开(公告)日：2004-11-02

    申请号：US10200814

    申请日：2002-07-22

    申请人： Jozef J. I. Van Dun ,  Jacquelyn A. deGroot ,  Pradeep Jain ,  Kalyan Sehanobish ,  Pak-Wing S. Chum

    发明人： Jozef J. I. Van Dun ,  Jacquelyn A. deGroot ,  Pradeep Jain ,  Kalyan Sehanobish ,  Pak-Wing S. Chum

    IPC分类号： C08L2300

    CPC分类号： B32B27/32 ,  Y10S526/943

    摘要： This invention relates to cast films prepared from interpolymer compositions comprising; (A) a substantially linear ethylene/&agr;-olefin interpolymer present in the composition in an amount of from about 10 to about 100% by weight based on the combined weight of Components A and B; and (B) a heterogeneous interpolymer present in the composition in an amount of from about 0 to about 90% by weight based on the combined weight of Components A and B; and wherein said interpolymer composition has an I10/I2 value of −1.2−1.3* log(I2) The interpolymer compositions are useful in cast stretch film manufacture with the resulting cast films having an excellent balance of strength and processability.

    摘要翻译： 本发明涉及由互聚物组合物制备的流延膜，其包含：（A）组合物中基本上线性的乙烯/α-烯烃互聚物，其量为约10至约100重量％，基于组分A和 B; 和（B）基于组分A和B的组合重量，组合物中存在的异构互聚物的量为约0至约90重量％; 并且其中所述互聚物组合物的I 10 / I 2值<约10.0，并且其特征在于具有100rad / s的粘度和满足以下关系之一的弛豫时间（τ）;或所述互聚物组合物可用于铸塑拉伸膜 制造出具有优异的强度和加工性能的所得流延薄膜。

    Blends of .alpha.-olefin/vinyl aromatic monomer and/or aliphatic or cycloaliphatic vinyl or vinylidene monomer interpolymers
    7.
    发明授权
    Blends of .alpha.-olefin/vinyl aromatic monomer and/or aliphatic or cycloaliphatic vinyl or vinylidene monomer interpolymers 失效
    α-烯烃/乙烯基芳族单体和/或脂族或脂环族乙烯基或亚乙烯基单体互聚物的共混物

    公开(公告)号：US6166145A

    公开(公告)日：2000-12-26

    申请号：US121461

    申请日：1998-07-23

    申请人： Martin J. Guest ,  Yunwa W. Cheung ,  John J. Gathers ,  Pak-Wing S. Chum

    发明人： Martin J. Guest ,  Yunwa W. Cheung ,  John J. Gathers ,  Pak-Wing S. Chum

    IPC分类号： C08J5/18 ,  C08J9/00 ,  C08L23/00 ,  C08L23/04 ,  C08L23/08 ,  C08L25/02 ,  C08L25/04 ,  C08L25/08 ,  C09J123/02 ,  C09J125/02 ,  C09J145/00 ,  C09K3/10 ,  D01F6/44 ,  C08L45/00

    CPC分类号： C08L23/04 ,  C08L23/0815 ,  C08L23/0838 ,  C08L25/02 ,  C08L2205/02 ,  Y10T428/1397 ,  Y10T428/2913 ,  C08L2666/04

    摘要： Blends of polymeric materials comprising a plurality of substantially random interpolymers each interpolymer comprising:(1) from about 1 to about 65 mole percent of polymer units derived from either(a) at least one vinyl aromatic monomer or(b) at least one aliphatic or cycloaliphatic vinyl or vinylidene monomer, or(c) a combination of at least one vinyl aromatic monomer and at least one aliphatic or cycloaliphatic vinyl or vinylidene monomer, and(2) from about 35 to about 99 mole percent of polymer units derived from ethylene and/or at least one aliphatic alpha olefin having from 3 to 20 carbon atoms; and wherein:the amount of polymer units derived from vinyl aromatic monomer and/or aliphatic or cycloaliphatic vinyl or vinylidene monomer in any interpolymer component differs from that amount in another interpolymer component by at least 0.5 mole percent.These blends of interpolymer components give enhanced properties or processability when compared to the individual polymers comprising the blend.

    摘要翻译： 包含多个基本无规共聚体的聚合材料的共混物，每个共聚体包含：（1）约1至约65摩尔％的衍生自（a）至少一种乙烯基芳族单体的聚合物单元或（b）至少一种脂族或 脂环族乙烯基或亚乙烯基单体，或（c）至少一种乙烯基芳族单体和至少一种脂族或脂环族乙烯基或亚乙烯基单体的组合，和（2）约35至约99摩尔％的衍生自乙烯和 /或至少一种具有3至20个碳原子的脂族α-烯烃; 并且其中：衍生自乙烯基芳族单体和/或任何互聚物组分中的脂族或脂环族乙烯基或亚乙烯基单体的聚合物单元的量与另一互聚物组分中的量的量不同至少为0.5摩尔％。 当与包含共混物的各种聚合物相比时，互聚物组分的这些共混物提供了增强的性能或加工性能。

    Cross-linked ethylenic polymer foam structures and process for making
    9.
    发明授权
    Cross-linked ethylenic polymer foam structures and process for making 失效
    交联乙烯聚合物泡沫结构及其制备方法

    公开(公告)号：US5288762A

    公开(公告)日：1994-02-22

    申请号：US54329

    申请日：1993-04-28

    申请人： Chung P. Park ,  Pak-Wing S. Chum ,  George W. Knight

    发明人： Chung P. Park ,  Pak-Wing S. Chum ,  George W. Knight

    IPC分类号： C08J9/10 ,  C08J9/14

    CPC分类号： C08J9/14 ,  C08J9/10 ,  C08J2323/16 ,  Y10S526/943

    摘要： Disclosed is a cross-linked ethylenic polymer foam structure of an ethylenic polymer material of a cross-linked, substantially linear ethylenic polymer. The substantially linear ethylenic polymer having in an uncross-linked state has: a) a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63; b) a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation: M.sub.w /M.sub.n .gtoreq.(I.sub.10 /I.sub.2)- 4.63; and c) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear ethylenic polymer having about the same I.sub.2 and M.sub.w /M.sub.n. Further disclosed is a process for making the above foam structure.

    摘要翻译： 公开了交联的，基本上线性的烯属聚合物的乙烯类聚合物材料的交联乙烯类聚合物泡沫结构。 具有未交联状态的基本上线性的乙烯类聚合物具有：a）熔体流动比，I10 / I2> = 5.63; b）由以下等式定义的分子量分布Mw / Mn：Mw / Mn> =（I10 / I2）-4.63; 和c）在具有大约相同的I2和Mw / Mn的线性烯属聚合物的表面熔融断裂开始时，表面熔融断裂开始时的临界剪切速率比临界剪切速率大至少50％。 进一步公开了制造上述泡沫结构的方法。