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    Propylene polymers for films
    2.
    发明授权
    Propylene polymers for films 有权
    丙烯聚合物薄膜

    公开(公告)号：US06583227B2

    公开(公告)日：2003-06-24

    申请号：US09800238

    申请日：2001-03-06

    申请人： Aspy K. Mehta ,  Michael C. Chen ,  James J. McAlpin ,  Anthony N. Speca ,  Kelly Tormaschy ,  Chon Y. Lin

    发明人： Aspy K. Mehta ,  Michael C. Chen ,  James J. McAlpin ,  Anthony N. Speca ,  Kelly Tormaschy ,  Chon Y. Lin

    IPC分类号： C08L2314

    CPC分类号： C08F10/00 ,  C08F10/06 ,  C08F210/06 ,  C08F210/16 ,  C08F297/08 ,  C08J5/18 ,  C08J2323/10 ,  C08J2323/12 ,  C08L23/12 ,  C08L23/142 ,  C08L2205/02 ,  C08L2308/00 ,  C08L2314/06 ,  Y10S526/943 ,  C08F4/65904 ,  C08F2/001 ,  C08L2666/04 ,  C08F2500/15 ,  C08F2500/05 ,  C08F2500/03 ,  C08F2500/01 ,  C08F2500/26 ,  C08F2500/12

    摘要： This invention relates generally to crystalline propylene polymers, to methods for their production and to methods for their use in film applications. Specifically, this invention relates to crystalline propylene polymers comprising both propylene homopolymer and propylene copolymer. The compositions are prepared using metallocene catalyst systems comprising at least two metallocenes in a polymerization process that involves the sequential or parallel polymerization of propylene homopolymer and copolymer using propylene with a small amount of comonomer, preferably ethylene. The polymerization is catalyzed by a dual metallocene catalyst system. The resulting polymers have a broad, bimodal molecular weight distribution. The resulting polymers are excellent for use in the production of biaxially oriented films or non-oriented films. Films prepared with these propylene polymers have a significantly broader processability range and can be evenly stretched at lower temperature compared to films prepared from traditional propylene polymer.

    摘要翻译： 本发明一般涉及结晶丙烯聚合物，其制备方法及其用于膜应用的方法。 具体地说，本发明涉及包含丙烯均聚物和丙烯共聚物的结晶丙烯聚合物。 在聚合过程中使用包含至少两种金属茂的茂金属催化剂体系制备组合物，其涉及使用丙烯与少量共聚单体，优选乙烯的丙烯均聚物和共聚物的顺序或平行聚合。 聚合由双茂金属催化剂体系催化。 所得聚合物具有宽的双峰分子量分布。 所得聚合物非常适用于制备双轴取向膜或非取向膜。 用这些丙烯聚合物制备的膜具有显着更宽的加工性能范围，与传统丙烯聚合物制备的膜相比，可以在较低的温度下均匀地拉伸。

    Homogeneous polymer blend and articles therefrom
    4.
    发明授权
    Homogeneous polymer blend and articles therefrom 失效
    均相聚合物共混物及其制品

    公开(公告)号：US07619038B2

    公开(公告)日：2009-11-17

    申请号：US11299022

    申请日：2005-12-09

    申请人： Aspy K. Mehta ,  Chia Cheng ,  Sudhin Datta ,  Wen Li ,  Chon Y. Lin ,  Srivatsan S. Iyer

    发明人： Aspy K. Mehta ,  Chia Cheng ,  Sudhin Datta ,  Wen Li ,  Chon Y. Lin ,  Srivatsan S. Iyer

    IPC分类号： C08L23/10 ,  C08L23/14

    CPC分类号： C08L23/10 ,  C08L23/142 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2314/06 ,  C08L2666/06

    摘要： This invention relates to homogeneous blends of: 1) from 60 to 99 weight percent of one or more semi-crystalline polymers (based upon the weight of the semi-crystalline and semi-amorphous polymers), each semi-crystalline polymer comprising propylene and from 0 to 5 weight % alpha-olefin comonomer (based upon the weight of the polymer), said semi-crystalline polymers each having a melting point between 100 and 170° C. and a melt flow rate of 200 dg/min or less; and 2) from 1 to 40 weight % of one or more semi-amorphous polymers (based upon the weight of the semi-crystalline and semi-amorphous polymers), each semi-amorphous polymer comprising propylene and from 5 to 12 weight % of one or more C2 and or C4 to C10 alpha-olefin comonomers, said semi-amorphous polymers each having: a) 10 to 50 percent crystallinity or less; b) a melt flow rate of 200 dg/min or less; c) a DSC melting point (second melt Tm) of 130° C. or less; d) an intermolecular composition distribution as determined by thermal fractionation in hexane such that 85% by weight or more of the polymer is isolated as one or two adjacent, soluble fractions with the balance of the polymer in immediately preceding or succeeding fractions; and wherein each of these fractions has a wt % comonomer content with a difference of no greater than 20 wt % relative to the average wt % comonomer content of the copolymer; e) an Mw/Mn of 1.5 to 4, f) a triad tacticity of three propylene units, as measured by 13C NMR, of 75% or greater, for use in films, fibers, non-wovens, molded articles and the like.

    摘要翻译： 本发明涉及以下均质共混物：1）60至99重量％的一种或多种半结晶聚合物（基于半结晶和半无定形聚合物的重量），每种半结晶聚合物包含丙烯和 0至5重量％的α-烯烃共聚单体（基于聚合物的重量），所述半结晶聚合物各自具有100-170℃的熔点和200dg / min以下的熔体流动速率; 和2）1至40重量％的一种或多种半无定形聚合物（基于半结晶和半无定形聚合物的重量），每种包含丙烯的半无定形聚合物和5至12重量％的一种 或更多的C 2和C 4至C 10α-烯烃共聚单体，所述半无定形聚合物各自具有：a）10至50％的结晶度或更低; b）200dg / min或更低的熔体流动速率; c）130℃或更低的DSC熔点（第二熔体Tm）; d）通过在己烷中的热分馏测定的分子间组成分布，使得85重量％或更多的聚合物作为一个或两个相邻的可溶性级分分离，在紧邻的前面或后续级分中余量的聚合物分离; 并且其中这些级分中的每一种都具有相对于共聚物的平均重量％共聚单体含量的不大于20重量％的重量％共聚单体含量; e）Mw / Mn为1.5至4，f）通过13 C NMR测量的三个丙烯单元的三单元组立构规整度为75％或更大，用于膜，纤维，无纺布，模制品等。

    Polymer blends and nonwoven articles therefrom
    5.
    发明授权
    Polymer blends and nonwoven articles therefrom 有权

    公开(公告)号：US07319077B2

    公开(公告)日：2008-01-15

    申请号：US11299167

    申请日：2005-12-09

    申请人： Aspy K. Mehta ,  Chia Yung Cheng ,  Sudhin Datta ,  Wen Li ,  Chon Y. Lin ,  Srivatsan S. Iyer

    发明人： Aspy K. Mehta ,  Chia Yung Cheng ,  Sudhin Datta ,  Wen Li ,  Chon Y. Lin ,  Srivatsan S. Iyer

    IPC分类号： D04H1/00 ,  D04H3/00 ,  D04H5/00 ,  B32B25/02

    CPC分类号： C08L23/10 ,  C08L23/142 ,  C08L2205/02 ,  C08L2314/06 ,  D01F1/10 ,  D01F6/46 ,  D04H1/4291 ,  D04H1/4382 ,  D04H1/4391 ,  D04H1/56 ,  D04H3/16 ,  Y10T428/249938 ,  Y10T442/60 ,  Y10T442/607 ,  Y10T442/627 ,  Y10T442/633 ,  Y10T442/636 ,  Y10T442/637 ,  C08L2666/06

    摘要： This invention relates to a nonwoven article comprising a heterogeneous blend comprising: 1) from 60 to 99 weight percent of one or more semi-crystalline polymers (based upon the weight of the semi-crystalline and semi-amorphous polymers), each semi-crystalline polymer comprising propylene and from 0 to 5 weight % alpha-olefin comonomer (based upon the weight of the polymer), said semi-crystalline polymers each having a melting point between 100 and 170° C. and a melt flow rate of 2000 dg/min or less; and 2) from 1 to 40 weight % of one or more semi-amorphous polymers (based upon the weight of the semi-crystalline and semi-amorphous polymers), each semi-amorphous polymer comprising propylene and from 10 to 25 weight % of one or more C2 and or C4 to C10 alpha-olefin comonomers, said semi-amorphous polymers each having: a) heat of fusion of 4 to 70 J/g; b) a Melt Flow Rate of 0.1 to 2000 dg/min; c) an intermolecular compositional distribution as determined by thermal fractionation in hexane such that 85% by weight or more of the polymer is isolated as one or two adjacent, soluble fractions with the balance of the polymer in immediately preceding or succeeding fractions; and wherein each of these fractions has a wt % comonomer content with a difference of no greater than 20 wt % relative to the average wt % comonomer content of the copolymer; and d) an Mw/Mn of 1.5 to 4, and e) a propylene triad tacticity, as measured by 13C NMR, of 75% or greater; where the blend of the semi-crystalline and semi-amorphous polymers comprises less than 5 weight % filler, based upon the weight of the polymers and the filler, and the blend has: i) an MFR greater than 10 dg/min; and ii) a Permanent Set of greater than 65% (as measured on a 125 mil thick molded part); and where the nonwoven article has a Hand of 40 g or less at a fabric basis weight of 35 gsm.