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    Ethylene-Based Polymers with Low Hexane Extractables and Low Densities
    62.
    发明申请
    Ethylene-Based Polymers with Low Hexane Extractables and Low Densities 审中-公开

    公开(公告)号：US20190002606A1

    公开(公告)日：2019-01-03

    申请号：US15737474

    申请日：2016-06-16

    Applicant: Dow Global Technologies LLC

    Inventor： Otto J. Berbee ,  Cornelis F.J. Den Doelder ,  Stefan Hinrichs ,  Teresa P. Karjala ,  John O. Osby

    IPC: C08F110/02

    Abstract: Ethylene-based polymers comprising the following properties: (A) a density less than 0.9190 g/cc; (B) a hexane extractable level that meets the following equation: hexane extractable level ≤A+B [log(12)], where A=2.65 wt %. and B—0.25 wt %[log (dg/min)]; based on total weight of the ethylene-based polymer; (C) a G′ (at G″=500 Pa, 1 70° C.) that meets the following equation: G′≥C+D [log(12)], where C=150 Pa, and D=−60 Pa/[log(dg/min)]; and (D) a melt index (12) from 0.7 to 20 dg/min; are made in high pressure tubular process that comprises at least three reaction zones with the peak polymerization temperature of the first reaction zone ≥320° C. and the peak polymerization temperature of the last reaction zone ≤290° C.

    PROCESS TO CONTROL OUTPUT AND QUALITY OF ETHYLENE-BASED POLYMER FORMED BY HIGH PRESSURE FREE RADICAL POLYMERIZATION
    63.
    发明申请
    PROCESS TO CONTROL OUTPUT AND QUALITY OF ETHYLENE-BASED POLYMER FORMED BY HIGH PRESSURE FREE RADICAL POLYMERIZATION 审中-公开

    公开(公告)号：US20180346613A1

    公开(公告)日：2018-12-06

    申请号：US15527853

    申请日：2015-12-18

    Applicant: Dow Global Technologies LLC ,  Dow Brasil Sudeste Industrial Ltda.

    Inventor： Cornelis J F Hosman ,  Otto J. Berbee ,  Sergio E. Goncalves ,  Nhi T. Y. Dang

    IPC: C08F10/02

    CPC classification number: C08F10/02 ,  C08F2/01 ,  C08F2/34 ,  Y02P20/582

    Abstract: The invention provides a process to prepare an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one initiator system selected from the following: a) class 1 initiator system, b) class 2 initiator system, c) class 3 initiator system, or d) a combination thereof; and at a inlet pressure (P2) greater than, or equal to, 1000 Bar (100 MPa); and in a reactor system comprising at least one hyper compressor and a reactor configuration comprising at least one reactor, which comprises at least one reaction zone; and wherein the inlet pressure (P2) is reduced by at least 200 Bar, as compared to a similar polymerization, in the same reactor system, except it is operated at a higher inlet pressure (P1), and at a different hyper compressor throughput, and at a different maximum temperature for at least one reaction zone, and optionally, at a different amount of CTA system fed to the reactor configuration; and wherein, for the process, the “Ratio of total reactor consumption of the highest temperature class initiator system(s) (Y)” meets the following Equation D: 0.95*x̂((P1−P2)/10 MPa)

    HIGH PRESSURE FREE-RADICAL POLYMERIZATIONS
    68.
    发明申请
    HIGH PRESSURE FREE-RADICAL POLYMERIZATIONS 审中-公开

    公开(公告)号：US20180134824A1

    公开(公告)日：2018-05-17

    申请号：US15574310

    申请日：2016-06-30

    Applicant: Dow Global Technologies LLC

    Inventor： Christopher R. Eddy ,  Jeffery S. Bradley ,  Otto J. Berbee ,  Sarat Munjal ,  Bryan Gutermuth

    IPC: C08F210/02 ,  B01J3/04

    CPC classification number: C08F210/02 ,  B01J3/00 ,  B01J3/04 ,  B01J3/042 ,  Y02P20/582 ,  C08F2/01 ,  C08F220/06

    Abstract: A process to form an ethylene-based polymer comprising, in polymerized form, ethylene and at least one acid comonomer, said process comprising polymerizing a reaction mixture comprising the ethylene and the acid comonomer, in a reactor configuration comprising at least one Secondary compressor, at least one pressurization device, and at least one reactor selected from the following: at least one autoclave reactor, at least one tubular reactor, or a combination thereof; and wherein the reaction mixture is polymerized in the presence of at least one free-radical initiator, and at a pressure of at least 1000 Bar; and wherein at least a portion of a comonomer composition comprising at least a portion of the acid comonomer used in the polymerization, is compressed, to form a compressed comonomer composition, in the pressurization device, up to a discharge pressure ranging from 1000 Bar to 4000 Bar, and at a discharge temperature (DT) from 10 C to 100 C; and wherein the compressed comonomer composition bypasses the Secondary compressor, and is fed, downstream from the Secondary compressor, into the reactor, and/or into one or more feed streams to the reactor.

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