Multilayered polymer films and process for the preparation thereof
    1.
    发明授权
    Multilayered polymer films and process for the preparation thereof 失效
    多层聚合物膜及其制备方法

    公开(公告)号:US06333086B1

    公开(公告)日:2001-12-25

    申请号:US08535259

    申请日:1996-01-29

    IPC分类号: B29D2200

    摘要: The present invention concerns a multilayered polymer film structure, which comprises at least one first layer (1) containing a thermoplastic polymer and at least one second layer (2), arranged adjacent to said first layer, containing a liquid crystalline polymer. According to the invention, the second layer (2) consists essentially of a compounded polymer blend formed by the liquid crystalline polymer and a thermoplastic polymer, the liquid crystalline polymer of the second layer forms a continuous phase, and the first and the second layers (1, 2) contain the same thermoplastic polymer. The oxygen transmission rate of the second layer is less than about 150 cm3/(m2·d·bar), determined according to the standard ASTM D 3985-81, and the water vapour transmission rate of the integral film structure is less than 10 g/(m2·24·h) at RH 80% 23° C., determined according to ASTM F 1249-90. The present structure can be used as a barrier layer in packages.

    摘要翻译: 本发明涉及一种多层聚合物膜结构,其包括含有热塑性聚合物的至少一个第一层(1)和邻近所述第一层设置的包含液晶聚合物的至少一个第二层(2)。 根据本发明,第二层(2)基本上由由液晶聚合物和热塑性聚合物形成的复合聚合物共混物组成,第二层的液晶聚合物形成连续相,并且第一和第二层( 1,2)含有相同的热塑性聚合物。 根据标准ASTM D 3985-81测定,第二层的氧气透过率小于约150cm 3 /(m2.d.bar),整体膜结构的水蒸汽透过率小于10g /(m2.24.h)在RH80%23℃下,根据ASTM F 1249-90测定。 本结构可用作封装中的阻挡层。

    Process for the preparation of creep-resistant polypropylene block copolymers
    5.
    发明授权
    Process for the preparation of creep-resistant polypropylene block copolymers 失效
    抗蠕变聚丙烯嵌段共聚物的制备方法

    公开(公告)号:US06221974B1

    公开(公告)日:2001-04-24

    申请号:US09171434

    申请日:1998-12-21

    IPC分类号: C08F29706

    CPC分类号: F16L9/133 F16L57/02

    摘要: The invention relates to a process for the preparation of a creep-resistant polypropylene by means of the following steps: (a) copolymerizing propylene and ethylene into a random copolymer at 40 to 110° C. using: a catalyst system of the above-mentioned type; a portion of ethylene or C4-C10-&agr;-olefin leading to 1.0 to 10.0% by weight of ethylene repeating units in said random copolymer; and no or a minimal amount of hydrogen leading to a MFR10 value of between 0.01 and 5.0 g/10 min for said random copolymer, if this step is performed first, or to a MFR2 value for said polypropylene of between 0.05 and 0.40 g/10 min, if this step is performed after step (b); the proportion of random copolymer of this step being from 20 to 80% by weight of said polypropylene, (b) polymerizing propylene at 40 to 110° C. using: a catalyst system of the above-mentioned type; no or a minimal portion of ethylene leading to 0.0 to 1.0% by weight of ethylene repeating units in the polymer resulting from this step; and an amount of hydrogen leading to a MFR2 value of between 30 and 300 g/10 min for said polymer, if this step is performed first, or to a MFR2 value for said polypropylene of between 0.05 and 0.40 g/10 min, if this step is performed after step (a); the proportion of polymer of this step being from 80 to 20% by weight of said polypropylene.

    摘要翻译: 本发明涉及一种通过以下步骤制备耐蠕变聚丙烯的方法:(a)在40-110℃下将丙烯和乙烯共聚到无规共聚物中,使用上述的催化剂体系 类型; 一部分乙烯或C4-C10-α-烯烃,导致所述无规共聚物中的乙烯重复单元的重量比为1.0-10.0% 并且对于所述无规共聚物,如果首先进行该步骤,或者对于所述聚丙烯的MFR 2值为0.05-0.40g / 10min,则没有或最小量的氢导致MFR10值在0.01-5.0g / 10min之间 min,如果在步骤(b)之后执行该步骤; 该步骤的无规共聚物的比例为所述聚丙烯的20至80重量%,(b)在40至110℃下聚合丙烯,使用上述类型的催化剂体系; 乙烯的无或最小部分导致由该步骤得到的聚合物中的乙烯重复单元为0.0-1.0重量% 如果该步骤首先进行,则导致所述聚合物的MFR 2值为30-300g / 10分钟的氢气量,或者对于所述聚丙烯的MFR 2值为0.05-0.40g / 10min,如果这样 在步骤(a)之后执行步骤; 该步骤的聚合物的比例为所述聚丙烯的80至20重量%。