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44 条记录 (耗时 0.049 秒)

    Synthesis and use of well-defined, highly-branched saturated hydrocarbon polymers
    22.
    发明申请
    Synthesis and use of well-defined, highly-branched saturated hydrocarbon polymers 有权
    明确定义的高度支化的饱和烃聚合物的合成和使用

    公开(公告)号：US20100227977A1

    公开(公告)日：2010-09-09

    申请号：US12658567

    申请日：2010-02-05

    申请人： David J. Lohse ,  César Garcia-Franco ,  Nikos Hadjichristidis

    发明人： David J. Lohse ,  César Garcia-Franco ,  Nikos Hadjichristidis

    IPC分类号： C08L23/04 ,  C08F236/00 ,  C08F110/02

    CPC分类号： C08C19/44 ,  C08C19/02 ,  C08F36/04 ,  C08F110/02 ,  C08F236/10 ,  C08F255/02 ,  C08G83/003 ,  C08L9/00 ,  C08L23/0815 ,  C08L51/06 ,  C08L101/005 ,  C08L2205/14 ,  C08L2205/16 ,  C08L2666/06 ,  C08L2666/02 ,  C08L2666/04 ,  C08F4/48 ,  C08F2500/09

    摘要： The present invention relates to a method to produce highly branched polymers with a polyolefin backbone structure of ethylene and precise control of the nature of the branching. In particular, the distribution of branch length and number of branches can be more precisely controlled via the polymerization method of the present invention. The method comprises using anionic chemistry to make unsaturated polydienes with a well-defined, highly-branched structure, and then hydrogenating these polydienes to form highly branched or dendritic saturated hydrocarbon polymers. Highly branched or dendritic polyethylene, ethylene-propylene copolymer and atactic polypropylene are among the saturated hydrocarbon polymers that can be anionically synthesized via the proper selection of diene monomer type, coupling agent, and hydrogenation conditions. The highly branched or dendritic saturated hydrocarbon polymers of the present invention find application in injection molding and extrusion processes as a minor additive for improving processability of linear polyolefins by delaying the onset of melt fracture, and correspondingly increasing melt throughput rates. An additional benefit is that the mechanical properties of the polyolefinic film, sheet, pipe or fiber produced with minor amounts of highly branched or dendritic saturated hydrocarbon polymers of the present disclosure are not negatively impacted.

    摘要翻译： 本发明涉及一种生产具有乙烯聚烯烃骨架结构的高度支化聚合物的方法，并且精确控制了支化性质。 特别地，可以通过本发明的聚合方法更精确地控制分支长度和分支数的分布。 该方法包括使用阴离子化学制备具有明确定义的高支化结构的不饱和聚二烯，然后将这些聚二烯氢化形成高度支化或树枝状饱和烃聚合物。 高分支或树枝状聚乙烯，乙烯 - 丙烯共聚物和无规立构聚丙烯是通过二烯单体类型，偶联剂和氢化条件的适当选择可阴离子合成的饱和烃聚合物之一。 本发明的高度支化或树枝状饱和烃聚合物可用于注射成型和挤出方法，作为通过延迟熔体破裂开始并改善熔体通过速率来改善线性聚烯烃的加工性的次要添加剂。 另外的好处是，用本发明的少量高支化或树枝状饱和烃聚合物生产的聚烯烃膜，片，管或纤维的机械性能不会受到负面影响。

    Fullerene-polymer compositions
    23.
    发明授权
    Fullerene-polymer compositions 失效
    富勒烯聚合物组合物

    公开(公告)号：US5281653A

    公开(公告)日：1994-01-25

    申请号：US797525

    申请日：1991-11-25

    申请人： Hans Thomann ,  Patrick Brant ,  John P. Dismukes ,  David J. Lohse ,  Jyi-Faa Hwang ,  Edward N. Kresge

    发明人： Hans Thomann ,  Patrick Brant ,  John P. Dismukes ,  David J. Lohse ,  Jyi-Faa Hwang ,  Edward N. Kresge

    IPC分类号： C08K3/02 ,  C08K3/04 ,  C08L101/00 ,  C08K5/01

    CPC分类号： C08K3/04 ,  Y10S977/753

    摘要： The present invention relates to novel compositions of matter comprising fullerenes and polymers, wherein the fullerenes are combined with the polymer in an amount sufficient to result in a change or modification in the viscoelastic properties of the resulting composition from that of the unmodified polymer typically within the range of from about 0.01 wt. % to about 85 wt. %. Also included in the present invention is the process for making the novel fullerene-polymer compositions and the products produced by the process disclosed therein. The novel compositions show changes in the viscoelastic properties in comparison to the unmodified polymer, and hence, have utility in any application in which the unmodified polymer may be used, but wherein the application would benefit from the resulting change in the viscoelastic properties.

    摘要翻译： 本发明涉及包含富勒烯和聚合物的新型物质组合物，其中富勒烯与聚合物结合的量足以导致所得组合物的粘弹性性质与未改性聚合物的粘弹性性质的改变或改性， 范围为约0.01重量％ ％至约85重量％ ％。 本发明还包括制备新型富勒烯聚合物组合物和通过其中公开的方法制备的产品的方法。 与未改性的聚合物相比，该新型组合物显示出粘弹性性能的变化，因此在可以使用未改性聚合物的任何应用中具有实用性，但是其应用将受益于所得到的粘弹性质的变化。

    High throughput property testing of olefin copolymers using rheological determinations
    24.
    发明授权
    High throughput property testing of olefin copolymers using rheological determinations 失效
    使用流变学测定的烯烃共聚物的高通量性能测试

    公开(公告)号：US07427506B2

    公开(公告)日：2008-09-23

    申请号：US10823460

    申请日：2004-04-13

    申请人： Cesar A. Garcia-Franco ,  David J. Lohse ,  Bruce A. Harrington ,  Robert Jay Wittenbrink

    发明人： Cesar A. Garcia-Franco ,  David J. Lohse ,  Bruce A. Harrington ,  Robert Jay Wittenbrink

    IPC分类号： G01N37/00 ,  G01N1/00 ,  B01L9/00

    CPC分类号： G01N33/445 ,  Y10T436/13 ,  Y10T436/25

    摘要： A high throughput method to determine an amount of a comonomer in a copolymer sample of a copolymer system comprises the steps of providing a plurality of copolymer samples; creating an array of the copolymer samples; measuring a sample complex modulus of each of the copolymer samples at a comparison phase angle; and determining the amount of a comonomer in the copolymer sample by comparing the sample complex modulus to a calibration curve, wherein the calibration curve relates a concentration of the comonomer in the copolymer sample to a complex moduli of the copolymer sample determined at the comparison phase angle. A method of determining the amount of a comonomer in both a single copolymer sample, and in a high throughput scheme using the crossover modulus is also disclosed.

    摘要翻译： 用于确定共聚物体系的共聚物样品中共聚单体的量的高通量方法包括提供多个共聚物样品的步骤; 产生共聚物样品阵列; 以比较相位角测量每个共聚物样品的样品复数模量; 并且通过将样品复合物模量与校准曲线进行比较来确定共聚物样品中的共聚单体的量，其中校准曲线将共聚物样品中的共聚单体的浓度与在比较相位角处确定的共聚物样品的复数模量相关 。 还公开了在单一共聚物样品中以及使用交叉模量的高通量方案中测定共聚单体的量的方法。

    Polyethylene compositions for rotational molding
    25.
    发明授权
    Polyethylene compositions for rotational molding 有权
    用于旋转成型的聚乙烯组合物

    公开(公告)号：US07307126B2

    公开(公告)日：2007-12-11

    申请号：US11078320

    申请日：2005-03-14

    申请人： Arnold Lustiger ,  David J. Lohse ,  Blair A. Graham

    发明人： Arnold Lustiger ,  David J. Lohse ,  Blair A. Graham

    IPC分类号： C08L23/04 ,  C08L23/06

    CPC分类号： C08L23/0815 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2314/06 ,  Y10T428/1352 ,  Y10T428/1386 ,  Y10T428/31938 ,  C08L2666/06

    摘要： Polyethylene blend compositions suitable for rotomolding, rotomolded articles, and processes for rotomolding articles are provided. The polyethylene compositions include a first polyethylene having a melt index of 0.4 to 3.0 g/10 min and a density of from 0.910 to 0.930 g/cm3; and a second polyethylene having a melt index of 10 to 30 g/10 min and a density of 0.945 to 0.975 g/cm3. The composition has a density of from 0.930 to 0.955 g/cm3 and a melt index of 1.5 to 12 g/10 min, and the first and second polyethylenes differ in density by from 0.030 to 0.048 g/cm3. These compositions exhibit improved physical properties, such as Environmental Stress Crack Resistance and Izod Impact Strength.

    摘要翻译： 提供适合于滚塑的聚乙烯共混组合物，滚塑制品和滚塑制品的方法。 聚乙烯组合物包括熔体指数为0.4-3.0g / 10min，密度为0.910-0.930g / cm 3的第一聚乙烯; 和熔体指数为10〜30g / 10min，密度为0.945〜0.975g / cm 3的第二聚乙烯。 该组合物的密度为0.930至0.955g / cm 3，熔体指数为1.5至12g / 10min，第一和第二聚乙烯的密度在0.030至0.048g / cm 3。 这些组合物表现出改善的物理性能，例如环境应力开裂抗力和艾佐德冲击强度。