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    COATED OLEFIN-BASED POLYMERS WITH REDUCED BLOCKING
    4.
    发明申请
    COATED OLEFIN-BASED POLYMERS WITH REDUCED BLOCKING 有权

    公开(公告)号：US20210363310A1

    公开(公告)日：2021-11-25

    申请号：US17256995

    申请日：2019-06-28

    Applicant: Dow Global Technologies LLC

    Inventor： Shrikant Dhodapkar ,  Remi A. Trottler ,  George W. Haun ,  Harold W. Boone ,  Intan M. Hamdan ,  Michael D. Turner

    IPC: C08J3/12

    Abstract: A process to form coated polymer particles comprising polymer particles formed from a polymer composition comprising an olefin-based polymer, and a coating formed from a coating composition comprising an aqueous metal acid dispersion and an aqueous polysiloxane emulsion, said process comprising the following: mixing together the aqueous metal acid dispersion and the aqueous polysiloxane emulsion to form a dispersion/emulsion mixture; applying the dispersion/emulsion mixture to a portion of the surfaces of the polymer particles to form wet-coated polymer particles; drying the wet-coated polymer particles to form the coated polymer particles. The aqueous metal acid dispersion and the aqueous polysiloxane emulsion may also be applied, individually, in separate steps.

    Solution polymerization process
    8.
    发明授权
    Solution polymerization process 有权

    公开(公告)号：US12162965B2

    公开(公告)日：2024-12-10

    申请号：US17312739

    申请日：2019-12-13

    Applicant: Dow Global Technologies LLC

    Inventor： Alec Y. Wang ,  Jorge Rubalcaba ,  Michael D. Turner ,  Michael J. Zogg, Jr. ,  Pradeep Jain

    IPC: C08F10/02 ,  B01J19/00 ,  B01J19/24 ,  C08F6/10

    Abstract: Disclosed herein too is a method comprising charging to a reactor system a feed stream comprising a catalyst, a monomer and a solvent; reacting the monomer to form a polymer; where the polymer is contained in a single phase polymer solution; transporting the polymer solution to a pre-heater to increase the temperature of the polymer solution; charging the polymer solution to a liquid-liquid separator; reducing a pressure of the polymer solution in the liquid-liquid separator and separating a polymer-rich phase from a solvent-rich phase in the liquid-liquid separator; transporting the polymer-rich phase to a plurality of devolatilization vessels located downstream of the liquid-liquid separator, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel; and separating the polymer from volatiles present in the polymer rich phase.

    SOLUTION POLYMERIZATION PROCESS
    9.
    发明申请
    SOLUTION POLYMERIZATION PROCESS 有权

    公开(公告)号：US20220017653A1

    公开(公告)日：2022-01-20

    申请号：US17312723

    申请日：2019-12-13

    Applicant: Dow Global Technologies LLC

    Inventor： Alec Y. Wang ,  Jorge Rubalcaba ,  Michael D. Turner ,  Michael J. Zogg, Jr. ,  Pradeep Jain

    IPC: C08F2/01 ,  C08F10/02 ,  C08F2/06 ,  C08F6/10 ,  C08K5/01 ,  B01J19/18

    Abstract: Disclosed herein is a system for solution polymerization comprising a reactor system that is operative to receive an anti-solvent, a monomer, and a solvent, and to react the monomer to form a polymer; where the anti-solvent is not a solvent for the polymer and is operative to reduce the lower critical solution temperature; a plurality of devolatilization vessels located downstream of the reactor system, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel and wherein the plurality of devolatilization vessels receives a polymer solution from the reactor system; and a liquid-liquid separator that is operative to receive a polymer solution from the reactor system and to facilitate a separation between the polymer and volatiles by reducing the pressure and temperature of the polymer solution in the liquid-liquid separator.

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