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    LUBRICANT TREATMENTS FOR FREE-RADICAL POLYMERIZATIONS
    31.
    发明申请
    LUBRICANT TREATMENTS FOR FREE-RADICAL POLYMERIZATIONS 审中-公开

    公开(公告)号：US20200277544A1

    公开(公告)日：2020-09-03

    申请号：US16332579

    申请日：2017-09-19

    Applicant: Dow Global Technologies LLC

    Inventor： Sean W. Ewart ,  Sarat Munjal ,  Kefu Sun

    IPC: C10M175/00 ,  C08F110/02 ,  C10M135/36 ,  C10M133/40 ,  C10M129/16

    Abstract: A process to prepare an ethylene-based polymer, said process comprising polymerizing a mixture comprising ethylene, at a pressure greater than, or equal to, 100 MPa, in the presence of at least one free-radical initiator; and in a reactor system comprising at least one reactor and at least one Hyper-compressor, and wherein at least one oil formulation, optionally comprising one or more lubrication agents, is added to the Hyper-compressor; and wherein at least one of the following steps takes place: A) thermally treating the one or more lubrication agents, in an oxygen-free atmosphere, to achieve a peroxide level≤10 ppm, based on the weight of the lubrication agent(s), and then adding said agent(s) to the oil formulation, prior to adding the oil formulation to the Hyper-compressor; or B) thermally treating the oil formulation, in an oxygen-free atmosphere, to achieve a peroxide level≤10 ppm, based on the weight of the oil formulation, prior to adding the oil formulation to the Hyper-compressor; C) a combination of A and B.

    Process for Making Ethylene-Based Polymers Using Hydrocarbon Initiators
    35.
    发明申请
    Process for Making Ethylene-Based Polymers Using Hydrocarbon Initiators 有权
    使用烃引发剂制备基于乙烯的聚合物的方法

    公开(公告)号：US20170073439A1

    公开(公告)日：2017-03-16

    申请号：US15308988

    申请日：2015-05-08

    Applicant: Dow Global Technologies LLC

    Inventor： Sean W. Ewart ,  Teresa P. Karjala ,  Mehmet Demirors ,  Christopher R. Eddy

    IPC: C08F110/02

    CPC classification number: C08F110/02 ,  C08F10/02 ,  C08F4/00 ,  C08F210/02 ,  C08F220/18 ,  C08F218/08 ,  C08F210/16 ,  C08F210/14 ,  C08F2500/11 ,  C08F2500/12 ,  C08F2500/04

    Abstract: An ethylene-based polymer, e.g., LDPE, with a low dissipation factor is made by a process comprising the step of contacting at polymerization conditions ethylene and, optionally, one or more comonomers, e.g., an alpha-olefin, with at least one carbon-carbon (C—C) hydrocarbyl, free-radical initiator of Structure 1: wherein R1, R2, R3, R4, R5 and R6, are each, independently, hydrogen or a hydrocarbyl group and wherein, optionally, two or more R groups (R1, R2, R3, R4, R5 and R6) form a ring structure, with the provisos that at least one of R2 and R5, and at least one of R3 and R6 is a hydrocarbyl group of at least two carbon atoms, e.g., an alkaryl of at least seven carbon atoms.

    Abstract translation: 通过包括以下步骤的方法制备具有低损耗因子的乙烯类聚合物，例如LDPE，所述方法包括在聚合条件下使乙烯和任选的一种或多种共聚单体（例如α-烯烃）与至少一种碳 （C-C）烃基，自由基引发剂，其中R 1，R 2，R 3，R 4，R 5和R 6各自独立地为氢或烃基，并且其中任选地，两个或多个R基团 （R 1，R 2，R 3，R 4，R 5和R 6）形成环结构，条件是R 2和R 5中的至少一个以及R 3和R 6中的至少一个是至少两个碳原子的烃基，例如 ，至少7个碳原子的烷芳基。

    APPARATUS AND METHOD OF USE THEREOF
    37.
    发明申请
    APPARATUS AND METHOD OF USE THEREOF 有权

    公开(公告)号：US20250060167A1

    公开(公告)日：2025-02-20

    申请号：US18937820

    申请日：2024-11-05

    Applicant: DOW GLOBAL TECHNOLOGIES LLC

    Inventor： Maria Pollard ,  Sean W. Ewart ,  Mark B. Davis ,  Bradley K. Blanchard

    IPC: F28D9/00 ,  C08F6/00 ,  C08F6/12 ,  F28F3/08

    Abstract: Disclosed herein is an apparatus comprising a shell; the shell having an inlet port for introducing a polymer solution into the shell and an outlet port for removing the polymer solution from the shell; wherein the polymer solution comprises a polymer and a solvent that is operative to dissolve the polymer; a plurality of plates in the shell; where the plurality of plates is stacked one atop the other to define a central passage that is in fluid communication with the inlet port of the shell; where the plurality of plates further defines a plurality of conduits, each conduit extending radially outwards from the central passage, where the plurality of conduits is in fluid communication with the central passage; and where the apparatus is operated at a pressure and a temperature effective to maintain the polymer solution in a single phase during its travel through the apparatus.

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