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    Films comprising isotactic propylene copolymers
    1.
    发明申请
    Films comprising isotactic propylene copolymers 审中-公开
    包含全同立构丙烯共聚物的膜

    公开(公告)号：US20060004167A1

    公开(公告)日：2006-01-05

    申请号：US11216805

    申请日：2005-08-31

    申请人： Li-Min Tau ,  Pak-Wing Chum ,  Seema Karande ,  Clive Bosnyak

    发明人： Li-Min Tau ,  Pak-Wing Chum ,  Seema Karande ,  Clive Bosnyak

    IPC分类号： C08F10/00

    CPC分类号： C08J5/18 ,  B32B27/32 ,  C07B2200/11 ,  C07F7/00 ,  C08F4/65908 ,  C08F4/65912 ,  C08F4/65916 ,  C08F4/6592 ,  C08F4/65927 ,  C08F10/00 ,  C08F110/06 ,  C08F210/06 ,  C08F210/16 ,  C08J2323/12 ,  C08J2323/14 ,  C08J2367/02 ,  C08L23/02 ,  C08L23/10 ,  C08L23/12 ,  C08L23/142 ,  C08L23/147 ,  C08L23/16 ,  C08L101/00 ,  C08L2205/02 ,  C08L2314/06 ,  C09K3/10 ,  C09K2200/0617 ,  C09K2200/062 ,  D01F6/06 ,  D01F6/30 ,  D01F6/46 ,  Y10T428/31909 ,  C08F4/659 ,  C08F4/65904 ,  C08F4/64144 ,  C08L2666/04 ,  C08L2666/06 ,  C08F2500/12 ,  C08F2500/20 ,  C08F2500/15 ,  C08F2500/24 ,  C08F2500/26 ,  C08F2500/03 ,  C08F2500/08 ,  C08F2/001

    摘要： Films with excellent machine direction (MD) tear properties comprise at least one layer made from a polymer comprising: (A) at least 50 weight percent (wt %) propylene; and (B) at least 5 wt % ethylene and/or one or more unsaturated comonomers. Representative of component (B) unsatuarated comonomers are the C4-20 α-olefins, C4-20 dienes, styrenic compounds, and the like. Preferably, the film has at least one of a (i) haze value of less than about 10, (ii) 45 degree gloss of greater than about 65, and (iii) dart value of greater than about 100 g/mil. In one preferred embodiment, the layer comprises a compolymer characterized as having at least one of the following properties: (i) 13C NMR peaks corresponding to a regio-error at about 14.6 and about 15.7 ppm, the peaks of about equal intensity, (ii) a B-value greater than about 1.4 when the comonomer content, i.e., the units derived from ethylene and/or the unsaturated comonomer(s), of the copolymer is at least about 3 wt %, (iii) a skewness index, Six, greater than about −1.20, (iv) a DSC curve with a Tme that remains essentially the same and a Tmax that decreases as the amount of comonomer, i.e., the units derived from ethylene and/or the unsaturated comonomer(s), in the copolymer is increased, and (v) an X-ray diffraction pattern that reports more gamma-form crystals than a comparable copolymer prepared with a Ziegler-Natta (Z-N) catalyst.

    摘要翻译： 具有良好机器方向（MD）撕裂性能的膜包括由聚合物制成的至少一层，包括：（A）至少50重量％（wt％）丙烯; 和（B）至少5重量％的乙烯和/或一种或多种不饱和共聚单体。 组分（B）不饱和共聚单体的代表是C 4-14-20α-烯烃，C 4-20二烯烃，苯乙烯类化合物等。 优选地，膜具有小于约10的（i）雾度值，（ii）大于约65的45度光泽度和（iii）大于约100g / mil的飞镖值中的至少一种。 在一个优选的实施方案中，该层包含特征在于具有以下特性中的至少一个的共聚物：（i）对应于约14.6和约15.7ppm的区域误差的13 C NMR峰， 大约相同强度的峰，（ii）当共聚单体含量（即衍生自共聚物的乙烯和/或不饱和共聚单体的单元）的B值至少为约3重量％时，B值大于约1.4， （iii）偏度指数S≈大于约-1.20，（iv）具有保持基本相同的T曲线和T max ，和（v）报告更多的X射线衍射图 比使用齐格勒 - 纳塔（ZN）催化剂制备的可比共聚物更好。