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    Soft Polypropylene-Based Nonwovens
    21.
    发明申请
    Soft Polypropylene-Based Nonwovens 有权
    柔软的聚丙烯基无纺布

    公开(公告)号：US20140374967A1

    公开(公告)日：2014-12-25

    申请号：US14484376

    申请日：2014-09-12

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Sudhin Datta ,  Derek W. Thurman ,  Chia Y. Cheng ,  Kuangyao B. Peng

    IPC: D04H3/009

    CPC classification number: D04H3/009 ,  C08F210/06 ,  C08L23/10 ,  C08L23/142 ,  C08L2314/06 ,  D01D5/0985 ,  D01F6/46 ,  D04H1/4291 ,  D04H3/007 ,  Y10T442/696 ,  C08L2666/06

    Abstract: Disclosed herein is a nonwoven fabric comprising within the range of from 1 to 49 wt %, by weight of the fabric, of a reactor grade propylene-α-olefin copolymer possessing; within the range of from 5 to 35 wt %, by weight of the copolymer, of units derived from one or more of ethylene and/or C4 to C12 α-olefins; a melt flow rate (230° C./2.16 kg) within the range of from 600 to 7500 g/10 min; and a weight average molecular weight of less than 200,000; and a second polypropylene having a melting point, Tm, of greater than 110° C. and a melt flow rate (230° C./2.16 kg) within the range of from 20 to 7500 g/10 min; wherein the fabric has a Handle value of less than 60% (measuring the fabric of 35 g/m2 basis weight). The fabric can be used in structures comprising one or more layers of the fabric described herein, and can include any number of other fabric layers made from other materials.

    Abstract translation: 本文公开了一种非织造织物，其包含在织物重量的1至49重量％的范围内，该反应器级丙烯-α-烯烃共聚物具有; 在5至35重量％的共聚物的范围内，衍生自一种或多种乙烯和/或C 4 -C 12α-烯烃的单元; 熔体流动速率（230℃/ 2.16kg）在600至7500g / 10min的范围内; 重均分子量小于20万; 和熔点Tm（Tm）大于110℃，熔体流动速率（230℃/ 2.16kg）在20至7500g / 10min范围内的第二聚丙烯; 其中织物具有小于60％的手柄值（测量织物为35g / m 2基重）。 织物可以用于包括本文所述的一层或多层织物的结构中，并且可以包括由其它材料制成的任何数量的其它织物层。

    Compatibilized thermoplastic vulcanizate compositions
    22.
    发明授权
    Compatibilized thermoplastic vulcanizate compositions 有权

    公开(公告)号：US11142605B2

    公开(公告)日：2021-10-12

    申请号：US16356844

    申请日：2019-03-18

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Sudhin Datta ,  Andy H. Tsou ,  Ron Walker ,  Hillary L. Passino

    IPC: C08L23/16 ,  C08F236/04 ,  C08F210/06 ,  C08F210/02 ,  C08L23/14 ,  C08F236/20 ,  C08F210/18 ,  C08J3/21 ,  C08J3/24

    Abstract: Disclosed is the preparation of compatibilized thermoplastic vulcanizates with reduced crosslinked rubber dispersion sizes and dispersity. A cross-linkable ethylene-propylene-diene terpolymer with majority propylene (PEDM) is used to compatibilize a plastic and rubber blend of a polypropylene (PP) and an ethylene-propylene-diene terpolymer rubber, where the propylene content is less than 50 wt % (EPDM), in dynamic vulcanization and preparation of PP/EPDM thermoplastic vulcanizates. The resulting PP/EPDM thermoplastic vulcanizates typically exhibit a weight average equivalent dispersion diameter of less than 3 microns and a particle size polydispersity index (PSDI), or weight average over number average dispersion diameter, of less than 5. This reduction in crosslinked rubber dispersion size in a PP/EPDM TPV by using PEDM compatibilizers enhances the toughness of the vulcanizate product by raising both elongation to break and break stress.

    Thermoplastic polyolefin containing amorphous ethylene elastomer
    25.
    发明授权
    Thermoplastic polyolefin containing amorphous ethylene elastomer 有权

    公开(公告)号：US10647841B2

    公开(公告)日：2020-05-12

    申请号：US15504233

    申请日：2015-08-21

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Sudhin Datta ,  Xin Chen ,  Abdul M. Jangda ,  Rohan A. Hule ,  Jan Kalfus

    IPC: C08L23/14

    Abstract: Disclosed is a thermoplastic polyolefin composition useful in automotive components comprising at least a polypropylene having a melting point temperature (Tm) of greater than 130° C. and a melt flow rate (230° C./2.16 kg) within the range from 10 g/10 min to 80 g/10 min; an amorphous ethylene-propylene copolymer comprising within the range from 40 wt % to 80 wt % ethylene derived units and having a melt flow rate (230° C./2.16 kg) within the range from 0.1 g/10 min to 20 g/10 min; and a propylene-based elastomer having within the range from 5 to 25 wt % ethylene derived units and having a Tm of less than 110° C. The composition only partially breaks or there is no break at −29° C. (ASTM D256) with Notched Izod Force of between 10 to 40 ft-lb/in2 at 22° C. (533 to 2,132 J/m2), and between 1.0 to 12 ft-lb/in2 at −29° C. (53 to 636 J/m2).

    PREPARATION OF BIMODAL RUBBER, THERMOPLASTIC VULCANIZATES, AND ARTICLES MADE THEREFROM
    26.
    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

    Applicant: ExxonMobil Chemical Patents Inc.

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

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

    Abstract: 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.

    Crosslinked Rubber Dispersion in Thermoplastic Vulcanizates
    27.
    发明申请
    Crosslinked Rubber Dispersion in Thermoplastic Vulcanizates 审中-公开

    公开(公告)号：US20190309154A1

    公开(公告)日：2019-10-10

    申请号：US16375501

    申请日：2019-04-04

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Sudhin Datta ,  Andy H. Tsou ,  Ron Walker ,  Bethany M. Welke

    IPC: C08L23/16 ,  C08J3/20 ,  C08J3/24

    Abstract: Use of twin screw extrusion to further enhance the uniformity of crosslinked rubber dispersion in thermoplastic vulcanizates (TPVs) to improve elastic properties of TPVs is disclosed. Most specifically, this invention employs intermeshing twin screw extruders to further homogenize dynamically vulcanized rubber dispersions in TPVs so that their particle size dispersion index (PSDI), or the ratio of weight average equivalent dispersion particle diameter to number average equivalent dispersion particle diameter, can be lowered to less than 1.6 or 1.57 with corresponding elastic property improvements by having lower hysteresis, higher elongation to break, and higher retractive force. TPV products having lower PSDI and improved elastic properties, and apparatus for conducting the disclosed method, are also provided.

    Thermoplastic Polyolefin Compositions with Ethylene-Propylene Copolymers
    29.
    发明申请
    Thermoplastic Polyolefin Compositions with Ethylene-Propylene Copolymers 审中-公开

    公开(公告)号：US20180186982A1

    公开(公告)日：2018-07-05

    申请号：US15724401

    申请日：2017-10-04

    Applicant: ExxonMobil Chemical Patents Inc.

    Inventor： Xin Chen ,  Sudhin Datta

    IPC: C08L23/12

    CPC classification number: C08L23/12 ,  C08L2205/02 ,  C08L2205/03 ,  C08L2205/06 ,  C08L23/16 ,  C08K3/34

    Abstract: This invention relates to a thermoplastic polyolefin composition with (a) 45 wt % to 70 wt % of a polypropylene having 70 wt % or more units derived from propylene, having a melting point temperature of greater than 130° C. and a melt flow rate from 2 to 80 g/10 min; (b) 20 wt % to 30 wt % of a bimodal ethylene-propylene copolymer comprising: (i) 80 wt % to 90 wt % of an amorphous ethylene-propylene copolymer having about 30 wt % or more units derived from ethylene; (ii) 5 wt % to 15 wt % of a semi-crystalline ethylene-propylene copolymer having 70 wt % or more units derived from ethylene; and (iii) 1 wt % to 5 wt % of a propylene-based elastomer having within the range from 5 wt % to 25 wt % ethylene derived units and having a melting point temperature of less than 110° C. and a Mw/Mn within the range from 2.0 to 4.0.

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