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    Method to improve the feeding of a carboxylic acid comonomer into a high pressure reactor
    33.
    发明授权
    Method to improve the feeding of a carboxylic acid comonomer into a high pressure reactor 有权
    改进将羧酸共聚单体进料到高压反应器中的方法

    公开(公告)号：US09416209B2

    公开(公告)日：2016-08-16

    申请号：US14438930

    申请日：2013-12-27

    Applicant: Dow Global Technologies LLC

    Inventor： Otto J. Berbee ,  Jeffery S. Bradley ,  Stefan Hinrichs

    IPC: C08F2/00 ,  C08F20/06 ,  C08F220/10 ,  C08F218/02 ,  C08F220/06 ,  C08F220/14 ,  C08F210/02 ,  C08F218/08 ,  C08F220/18

    CPC classification number: C08F220/06 ,  C08F2/00 ,  C08F210/02 ,  C08F218/08 ,  C08F220/14 ,  C08F220/18 ,  C08F2220/1808

    Abstract: The invention provides a method of injecting a compressed “comonomer/compound mixture,” comprising a “comonomer comprising a carboxylic acid,” and at least one compound, into at least one reactor; said method comprising, adding the at least one compound to the comonomer to form the “comonomer/compound mixture,” prior to compressing and injecting the mixture into the reactor; and wherein the crystallization temperature, at pressure P, of the “comonomer/compound mixture” is at least 5° C. lower than the crystallization temperature, at pressure P, of the comonomer, without the presence of the at least one compound; and wherein the pressure P is greater than 500 bar; and wherein the molar ratio of the at least one compound to the comonomer in the mixture is from 1/10 to 1/1; and wherein the comonomer/compound mixture comprises greater than, or equal to, 30 weight percent of the comonomer, based on the weight of the comonomer/compound mixture; and wherein the melting temperature, at atmospheric pressure, of the at least one compound is less than the melting temperature, at atmospheric pressure, of the comonomer. The invention also provides a method of forming an ethylene-based polymer, as described herein.

    Abstract translation: 本发明提供了将包含“包含羧酸的共聚单体”和至少一种化合物的压缩的“共聚单体/化合物混合物”注入至少一个反应器中的方法; 所述方法包括在将混合物压缩并注入反应器之前，将至少一种化合物加入到共聚单体中以形成“共聚单体/化合物混合物”; 并且其中“共聚单体/化合物混合物”在压力P下的结晶温度低于共聚单体的压力P下的结晶温度至少5℃，而不存在至少一种化合物; 并且其中所述压力P大于500巴; 并且其中所述混合物中所述至少一种化合物与所述共聚单体的摩尔比为1/10至1/1; 并且其中基于共聚单体/化合物混合物的重量，共聚单体/化合物混合物包含大于或等于30重量％的共聚单体; 并且其中所述至少一种化合物在大气压下的熔融温度小于所述共聚单体在大气压下的熔融温度。 本发明还提供如本文所述的形成乙烯基聚合物的方法。

    LOW DENSITY ETHYLENE-BASED POLYMER COMPOSITIONS WITH HIGH MELT STRENGTH AND MID-HIGH DENSITY CONTROL
    34.
    发明申请
    LOW DENSITY ETHYLENE-BASED POLYMER COMPOSITIONS WITH HIGH MELT STRENGTH AND MID-HIGH DENSITY CONTROL 有权
    具有高密度强度和中高密度控制的低密度乙烯基聚合物组合物

    公开(公告)号：US20160090476A1

    公开(公告)日：2016-03-31

    申请号：US14889221

    申请日：2014-05-21

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： Cornelis F.J. den Doelder ,  Karl Zuercher ,  Otto J. Berbee ,  Jian Wang ,  Teresa P. Karjala

    IPC: C08L23/06 ,  C08J9/00 ,  C09D123/06

    CPC classification number: C08L23/06 ,  C08J9/0061 ,  C08J2323/06 ,  C08J2423/06 ,  C08L2203/16 ,  C08L2205/025 ,  C08L2207/066 ,  C09D123/06

    Abstract: The invention provides a composition comprising a first ethylene-based polymer, formed by a high pressure, free-radical polymerization process, and a second ethylene-based polymer, formed by a high pressure, free-radical polymerization process, such composition comprising the following properties: a) a melt index (12) from 2.0 to 10 dg/min; b) a density from 0.922 to 0.935 g/cc; and wherein the second ethylene-based Hyper polymer is present in an amount from 60 to 95 weight percent, based on the sum of the weight of the first polymer and the second polymer; and wherein the second ethylene-based polymer has a density greater than, or equal to, 0.924 g/cc; and wherein the first ethylene-based polymer has a melt index less than 2.5 dg/min

    Abstract translation: 本发明提供一种组合物，其包含通过高压自由基聚合方法形成的第一乙烯类聚合物和通过高压自由基聚合方法形成的第二乙烯类聚合物，所述组合物包含以下 性质：a）2.0至10dg / min的熔体指数（12）; b）密度为0.922至0.935g / cc; 并且其中基于所述第一聚合物和所述第二聚合物的重量之和，所述第二基于乙烯的Hyper聚合物以60至95重量％的量存在; 并且其中所述第二乙烯类聚合物的密度大于或等于0.924g / cc; 并且其中所述第一乙烯类聚合物的熔融指数小于2.5dg / min

    POLYMERIZATION PROCESSES WITH FRESH ETHYLENE DISTRIBUTIONS FOR PREPARATION OF LOW DENSITY ETHYLENE-BASED POLYMERS
    36.
    发明申请
    POLYMERIZATION PROCESSES WITH FRESH ETHYLENE DISTRIBUTIONS FOR PREPARATION OF LOW DENSITY ETHYLENE-BASED POLYMERS 有权

    公开(公告)号：US20140288257A1

    公开(公告)日：2014-09-25

    申请号：US14352506

    申请日：2012-10-10

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： Werner Zschoch ,  Otto J. Berbee ,  Cornelis J. Hosman

    IPC: C08F110/02

    CPC classification number: C08F110/02 ,  C08F10/02 ,  C08F2/00 ,  C08F2/38 ,  C08F2500/08 ,  C08F2500/11 ,  C08F2500/12 ,  C08F2500/26

    Abstract: The invention provides a high pressure polymerization process to form an ethylene-based polymer, the process comprising at least the following steps: feeding ethylene to a first reaction zone and to one or more subsequent reaction zones, and wherein for each subsequent reaction zone that receives fresh ethylene, the ratio, Rn (n=reaction zone number, n>1), of “mass fraction of fresh ethylene fed to the first reaction zone (RZ1)” to “mass fraction of fresh ethylene fed to the nth reaction zone (RZn)” is (Rn=RZ1/RZn) greater than 1, or is from 0 to 0.30, and wherein the “total amount of ethylene fed to the polymerization process” derives from at least one fresh ethylene stream and at least one recycled ethylene stream, and wherein the at least one recycled ethylene stream comprises at least one chain transfer agent and/or comprises at greater than, or equal to, 1 weight %, based on total amount of components in recycled ethylene stream, of one or more non-ethylene components and/or CTA(s); and wherein the inlet feed to each reaction zone comprises less than 5 weight ppm oxygen based on the total weight of mass flows fed to the reaction zone. The invention also provides a high pressure polymerization process to form an ethylene-based polymer, the process comprising at least the following steps: feeding ethylene to a first reaction zone and to one or more subsequent reaction zones, and wherein 100 weight percent of the total amount of fresh ethylene fed to the polymerization process is fed to the first reaction zone, and wherein the “total amount of ethylene fed to the polymerization process” derives from at least one fresh ethylene stream and at least one recycled ethylene stream, and wherein the at least one recycled ethylene stream comprises at least one chain transfer agent and/or comprises at greater than, or equal to, 1 weight %, based on total amount of components in recycled ethylene stream, of one or more non-ethylene components and/or CTA(s); and wherein the inlet stream to each reaction zone comprises less than, or equal to, 5 weight ppm oxygen, based on the total weight of mass flows fed to the reaction zone.

    High pressure, free radical polymerizations to produce ethylene-based polymers
    39.
    发明授权
    High pressure, free radical polymerizations to produce ethylene-based polymers 有权

    公开(公告)号：US10774159B2

    公开(公告)日：2020-09-15

    申请号：US16302830

    申请日：2017-06-22

    Applicant: Dow Global Technologies LLC

    Inventor： Otto J. Berbee ,  Nhi T. Y. Dang ,  Cornelis J F Hosman ,  Joaquin Flores

    IPC: C08F2/01 ,  C08F2/00 ,  C08F2/38 ,  C08F10/02 ,  C08F110/02

    Abstract: A process to form an ethylene-based polymer comprising polymerizing a mixture comprising ethylene, in the presence of a free-radical initiator, and in a tubular reactor system comprising at least two ethylene-based feed streams, and a reactor configuration that comprises at least three reaction zones; and the inlet pressure of the first zone is 28%, and an m value from 20 mole % to 70 mole %, where m=mol % of ethylene-based feed stream to the first zone, based on total moles of ethylene-based feed streams fed to the reactor configuration; and the ratio (Q) of a “MWDB of a broad polymer polymerized, to a “MWDN of a narrow polymer polymerized, is as follows: {(T)*(−2.3×log(m)+7)}≤Q≤{(T)*(−13.0×log(m)+29.8)}; at the same melt index; and “T” is the “chain transfer activity ratio” as described herein.

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