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    POLYETHYLENE COMPOSITIONS
    3.
    发明申请
    POLYETHYLENE COMPOSITIONS 有权

    公开(公告)号：US20230072649A1

    公开(公告)日：2023-03-09

    申请号：US17789424

    申请日：2020-12-21

    Applicant: Dow Global Technologies LLC

    Inventor： Sanjib Biswas ,  Rahul Sharma ,  Jacquelyn A. DeGroot ,  Erica Spiekermann ,  Douglas S. Ginger ,  Jian Wang ,  Mehmet Demirors ,  David T. Gillespie ,  Hien Q. Do ,  Philip P. Fontaine

    IPC: C08L23/08 ,  C08F210/02 ,  C08J5/18

    Abstract: Embodiments of a polyethylene composition are provided, which may include a first polyethylene fraction comprising at least one peak in a temperature range of from 35° C. to 70° C. in an elution profile via improved comonomer composition distribution (iCCD) analysis method, where a first polyethylene area fraction is an area in the elution profile from 35° C. to 70° C., and where the first polyethylene fraction area comprises from 25% to 65% of the total area of the elution profile; and a second polyethylene fraction comprising at least one peak in a temperature range of from 85° C. to 120° C. in the elution profile, where a second polyethylene area fraction is an area in the elution profile from 85° C. to 120° C., and where the second polyethylene fraction area comprises at least 20% of the total area of the elution profile.

    IMPROVED METHOD TO MAKE CARBON MOLECULAR SIEVE HOLLOW FIBER MEMBRANES
    6.
    发明申请
    IMPROVED METHOD TO MAKE CARBON MOLECULAR SIEVE HOLLOW FIBER MEMBRANES 审中-公开

    公开(公告)号：US20190275471A1

    公开(公告)日：2019-09-12

    申请号：US16333919

    申请日：2017-09-25

    Applicant: Dow Global Technologies LLC

    Inventor： Liren Xu ,  Rahul Sharma ,  William J. Harris ,  Mark K. Brayden ,  Marcos V. Martinez

    IPC: B01D67/00 ,  B01D53/22 ,  B01D69/02 ,  B01D69/08 ,  B01D71/02 ,  C08G73/10

    Abstract: An asymmetric hollow fiber (CMS) carbon molecular sieve is made by providing a dope solution comprised of a polvimide and a solvent, at a temperature greater than 250° C. that is less than the storage modulus at a temperature of 250° C., but no more than ten times less as measured using dynamic mechanical thermal analysis from 250° C. to a temperature where the polyimide carbonizes. The polvimide is shaped into a hollow polvimide fiber, the solvent removed and the polyimide hollow fiber is heated to pyroiyze the polvimide and form the asymmetric hollow carbon molecular sieve. The asymmetric hollow fiber carbon molecular sieve has a wall that is defined by an inner surface and outer surface of said fiber and the wall has an inner porous support region extending from the inner surface to an outer raicroporous separation region that extends from the inner porous support region to the outer surface. Surprisingly, when the polyimide has the particular storage modulus characteristics, the method allows for the hollow fiber CMS to be made without any pre-treatmenis or additives to inhibit stractural collapse of the inner microporous region.

    ORIENTATION CONTROL LAYER POLYMERS, METHODS OF MANUFACTURE THEREOF AND ARTICLES COMPRISING THE SAME
    8.
    发明申请
    ORIENTATION CONTROL LAYER POLYMERS, METHODS OF MANUFACTURE THEREOF AND ARTICLES COMPRISING THE SAME 有权
    方向控制层聚合物，其制造方法和包含其的文章

    公开(公告)号：US20140377518A1

    公开(公告)日：2014-12-25

    申请号：US13925061

    申请日：2013-06-24

    Applicant: Dow Global Technologies LLC ,  Rohm and Haas Electronic Materials LLC

    Inventor： Peter Trefonas, III ,  Deyan Wang ,  Rahul Sharma ,  Phillip D. Hustad ,  Mingqi Li

    IPC: B05D1/36 ,  B32B43/00

    CPC classification number: B32B43/00 ,  B05D1/185 ,  B05D7/52 ,  B32B27/08 ,  B32B2457/14 ,  C08F2438/03 ,  C08L53/00 ,  G03F7/0002 ,  Y10T428/24942

    Abstract: Disclosed herein is a method comprising disposing a first composition comprising a first block copolymer upon a substrate; where the first block copolymer comprises a first segment and a second segment that are covalently bonded to each other and that are chemically different from each other; where the first segment has a first surface free energy and where the second segment has a second surface free energy; and disposing a second composition comprising an second copolymer upon a free surface of the first block copolymer; where the second copolymer comprises a surface free energy reducing moiety; where the surface free energy reducing moiety has a lower surface free energy than the first surface free energy and the second surface free energy; the second copolymer further comprising one or more moieties having an affinity to the first block copolymer; where the surface free energy reducing moiety is chemically different from the first segment and from the second segment.

    Abstract translation: 本文公开了一种方法，包括将包含第一嵌段共聚物的第一组合物设置在基材上; 其中第一嵌段共聚物包含彼此共价键合并且在化学上彼此不同的第一链段和第二链段; 其中所述第一段具有第一表面自由能，并且其中所述第二段具有第二表面自由能; 以及在所述第一嵌段共聚物的自由表面上设置包含第二共聚物的第二组合物; 其中第二共聚物包含表面自由能减少部分; 其中表面自由能减少部分具有比第一表面自由能和第二表面自由能更低的表面自由能; 所述第二共聚物还包含与所述第一嵌段共聚物具有亲和性的一个或多个部分; 其中表面自由能减少部分在化学上不同于第一段和第二段。

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