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    Dual metallocene catalyst copolymer compositions
    11.
    发明授权
    Dual metallocene catalyst copolymer compositions 有权

    公开(公告)号：US11352451B2

    公开(公告)日：2022-06-07

    申请号：US16315722

    申请日：2017-06-14

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Francis C. Rix ,  Rhutesh K. Shah ,  Rainer Kolb ,  Jo Ann M. Canich ,  Peijun Jiang ,  Periagaram S. Ravishankar ,  Syamal Tallury

    IPC: C08F4/6592 ,  C08F210/18 ,  B01J31/22 ,  C08F4/6192 ,  C08F110/06 ,  C08F4/659

    Abstract: Processes are provided which include copolymerization using two different metallocene catalysts, one capable of producing high Mooney-viscosity polymers and one suitable for producing lower Mooney-viscosity polymers having at least a portion of vinyl terminations. The two catalysts may be used together in polymerization to produce copolymer compositions of particularly well-tuned properties. For instance, polymerizations are contemplated to produce high-Mooney metallocene polymers that exhibit excellent processability and elasticity, notwithstanding their high Mooney viscosity. Other polymerizations are also contemplated in which lower-Mooney metallocene polymers are produced, which also exhibit excellent processability and elasticity, while furthermore having excellent cure properties suitable in curable elastomer compound applications. Many of the contemplated polymerizations include controlling the ratio of the two metallocene catalysts used in the polymerization so as to obtain the desired Mooney viscosity and desired rheology (indicated by Mooney Relaxation Area) of the copolymer compositions.

    Lubricating Oil Compositions Comprising Dual Metallocene-Catalyzed Bimodal Copolymer Compositions Useful as Viscosity Modifiers
    12.
    发明申请
    Lubricating Oil Compositions Comprising Dual Metallocene-Catalyzed Bimodal Copolymer Compositions Useful as Viscosity Modifiers 审中-公开

    公开(公告)号：US20190309236A1

    公开(公告)日：2019-10-10

    申请号：US16315294

    申请日：2017-06-14

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Jingwen Zhang ,  Rainer Kolb ,  Andy H. Tsou ,  Periagaram S. Ravishankar ,  Jo Ann M. Canich ,  Francis C. Rix

    IPC: C10M143/02 ,  C08F210/16 ,  C08F4/6592

    Abstract: This application relates to copolymer compositions and copolymerization processes, as well as to lubricating oil compositions comprising such copolymer compositions as viscosity index improvers, and base oil. The copolymer compositions may be made using two different metallocene catalysts: one capable of producing high molecular weight copolymers; and one suitable for producing lower molecular weight copolymers having at least a portion of vinyl terminations, and the copolymer compositions produced thereby. Copolymer compositions may comprise (1) a first ethylene copolymer fraction having high molecular weight, exhibiting branching topology, and having relatively lower ethylene content (based on the weight of the first ethylene copolymer fraction); and (2) a second ethylene copolymer fraction having low molecular weight, exhibiting linear rheology, and having relatively higher ethylene content (based on the weight of the second ethylene copolymer fraction). Lubricating oil compositions comprising such copolymer compositions may exhibit superior viscosity properties.

    Methods of Making Polymer Compositions with Enhanced Elasticity by Employing VTP and HMP Catalyst Systems in Parallel Processes
    17.
    发明申请
    Methods of Making Polymer Compositions with Enhanced Elasticity by Employing VTP and HMP Catalyst Systems in Parallel Processes 有权

    公开(公告)号：US20210179827A1

    公开(公告)日：2021-06-17

    申请号：US17269433

    申请日：2019-08-15

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Francis C. Rix ,  Jo Ann M. Canich ,  Rainer Kolb

    IPC: C08L23/08 ,  C08L23/16

    Abstract: Provided herein are methods of making blended polymer compositions having enhanced elasticity. The present methods comprise the steps of producing a first polymer composition using a VTP catalyst system, producing a second polymer composition using a HMP catalyst system and combining the first polymer composition and the second polymer composition to make the blended polymer composition. The present methods include blending/combining the polymer compositions produced by different catalyst systems. One such catalyst system includes (i) a vinyl-terminated polymer (VTP) catalyst system comprising a VTP catalyst compound (referred to herein also as a “VTP catalyst”) and one or more activators. Another catalyst system includes a high molecular-weight polymer (HMP) catalyst system comprising a HMP catalyst compound (referred to herein also as a “HMP catalyst”) and one or more activators. The activators of these different catalyst systems can be the same or different in whole or in part.

    Polymer compositions and methods of making them
    20.
    发明授权
    Polymer compositions and methods of making them 有权

    公开(公告)号：US10316176B2

    公开(公告)日：2019-06-11

    申请号：US14510443

    申请日：2014-10-09

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Periagaram S. Ravishankar ,  Rainer Kolb

    IPC: C10L1/16 ,  C10M111/04 ,  C07F5/04 ,  C08L23/14 ,  C10M143/00 ,  C10M143/08 ,  C08L23/08 ,  C10M143/04 ,  C08L23/16

    Abstract: The present disclosure is directed to polymer compositions that can be useful as viscosity modifiers, comprising (a) a first ethylene-α-olefin copolymer having an ethylene content of from about 60 to about 80 wt % and (b) a second ethylene-α-olefin copolymer having an ethylene content of from about 40 to about 60 wt %. The polymer composition comprises about 35 wt % to about 50 wt of the first ethylene-α-olefin copolymer and about 50 wt % to about 65 wt % of the second ethylene-α-olefin copolymer. The polymer compositions are made by comprising producing a first ethylene-α-olefin copolymer in a first reactor, directing the first copolymer to a second reactor, producing the second ethylene-α-olefin copolymer in the second reactor and forming the polymer composition.

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