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    Elastomeric Formulations Comprising Branched EPDM Polymers
    73.
    发明申请
    Elastomeric Formulations Comprising Branched EPDM Polymers 审中-公开

    公开(公告)号：US20200172717A1

    公开(公告)日：2020-06-04

    申请号：US16689214

    申请日：2019-11-20

    申请人： ExxonMobil Chemical Patents Inc.

    发明人： Narayanaswami Dharmarajan ,  Zhifeng Bai ,  Andy H. Tsou ,  Rhutesh K. Shah ,  John R. Hagadorn

    IPC分类号： C08L23/16

    摘要： A compound suitable for use in producing articles including foamed articles can include 100 parts per hundred rubber (phr) of a branched ethylene propylene diene monomer (EPDM) elastomer comprising 35 wt % to 70 wt % ethylene derived units, 20 wt % to 64 wt % propylene derived units, and 1 wt % to 10 wt % diene derived units, wherein the EPDM elastomer has a Mooney viscosity (ML) (1+4) at 125° C. of 30 MU to 120 MU, a corrected Mooney relaxation area (cMLRA) at 80 ML of 300 MU·sec to 1000 MU·sec, and long chain branching (LCB) g′ (vis) of 0.80 to 1.0; 75 phr to 200 phr of a filler; 25 phr to 125 phr of a processing oil; 5 phr to 50 phr of a curative, and optionally 0.1 phr to 25 phr of a foaming agent.

    PREPARATION OF BIMODAL RUBBER, THERMOPLASTIC VULCANIZATES, AND ARTICLES MADE THEREFROM
    74.
    发明申请
    PREPARATION OF BIMODAL RUBBER, THERMOPLASTIC VULCANIZATES, AND ARTICLES MADE THEREFROM 审中-公开

    公开(公告)号：US20200024436A1

    公开(公告)日：2020-01-23

    申请号：US16460260

    申请日：2019-07-02

    申请人： ExxonMobil Chemical Patents Inc.

    发明人： Andy H. Tsou ,  John R. Hagadorn ,  Jian Yang ,  Ron Walker ,  Sudhin Datta

    IPC分类号： C08L23/16 ,  C08F210/18 ,  C08J3/12

    摘要： Pellet-stable olefinic copolymer bimodal rubber is made using parallel reactors, with one reactor synthesizing higher molecular weight (MW) rubber with dual catalysts, with an improved molecular weight split ratio and an improved composition distribution of the moderate and ultra-high MW components, while another reactor synthesizes random isotactic polypropylene copolymer (RCP). The effluents are reactor-blended and result in pellet-stable bimodal rubber (P-SBR), which may be pelletized. When making thermoplastic vulcanizates (TPVs) with P-SBR, the need to granulate rubber bales and subsequently use talc, clay, or other anti-agglomeration agents to prevent granulated rubber crumbs from agglomerating are eliminated. TPVs made with P-SBR have vulcanized rubber particles that are smaller and more uniform in size, resulting in TPVs with higher particle counts and more thermoplastic “ligaments” between the particles, with such ligaments being made stronger by the added RCP. Such thus-produced TPVs have a lower hysteresis and flexural modulus, and better elastic properties.

    Production of olefin dimers
    77.
    发明授权
    Production of olefin dimers 有权

    公开(公告)号：US10358397B2

    公开(公告)日：2019-07-23

    申请号：US15948323

    申请日：2018-04-09

    申请人： ExxonMobil Chemical Patents Inc.

    发明人： Meagan E. Evans ,  Crisita Carmen H. Atienza ,  Jo Ann M. Canich ,  John R. Hagadorn ,  David A. Cano ,  Gregory S. Day ,  Patrick C. Chen

    IPC分类号： C07C2/32 ,  B01J31/22 ,  C10G50/00

    摘要： A process for producing alpha-olefin dimers comprises contacting, at a temperature of 80° C. or more, a feedstock comprising at least one C8+ (linear) alpha-olefin with a catalyst system comprising activator and one or more catalyst compounds represented by the formula: where M is a Group 4 metal; n is 1, 2, or 3; RA is hydrogen or a C1 to C10 alkyl; each of R1, R2, R3, R4, R5, R6, R7, and R8 is independently selected from hydrogen and C1 to C10 alkyl; each X is independently selected from the group consisting of hydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halides, and a combination thereof, (two X's may form a part of a fused ring or a ring system), the contacting being conducted under conditions effective to oligomerize at least part of C8+ alpha-olefin to produce an oligomerized product containing at least 30 wt % of the alpha-olefin dimer and at least 80 mol % of vinylidene unsaturation, where the conversion of the alpha olefin is at least 10 wt %, based upon the weight of the alpha olefin monomer entering the reactor and the weight of dimer produced.