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    TETRABLOCK COPOLYMERS AND ARTICLES MADE THEREFROM
    1.
    发明申请
    TETRABLOCK COPOLYMERS AND ARTICLES MADE THEREFROM 审中-公开

    公开(公告)号：WO2022229742A1

    公开(公告)日：2022-11-03

    申请号：PCT/IB2022/053064

    申请日：2022-04-01

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： LASKOWSKI, Carl A. ,  GILLARD, Timothy M. ,  MCINTOSH, Lucas D. ,  WALLER, JR., Clinton P.

    IPC: C08F297/02 ,  B01D71/28

    Abstract: Tetrablock copolymers of formula ABAC are provided that can be used to form porous articles such as porous hollow fibers and porous membranes. Each A block is formed from a vinyl aromatic monomer, the B block is formed from a conjugated diene monomer, and the C block is formed from at least two different oxirane (i.e., epoxy) compounds. The tetrablock copolymers can advantageously be prepared without the use of functional initiators and/or difunctional initiators. The tetrablock copolymers are well suited for solvent induced phase separation (SIPS) processing to prepare porous articles. Membranes formed from the tetrablock copolymers can be used for water treatment and biopharmaceutical purification and/or separation processes.

    POROUS MEMBRANES INCLUDING PENTABLOCK COPOLYMERS AND METHOD OF MAKING THE SAME
    2.
    发明申请
    POROUS MEMBRANES INCLUDING PENTABLOCK COPOLYMERS AND METHOD OF MAKING THE SAME 审中-公开

    公开(公告)号：WO2018097988A1

    公开(公告)日：2018-05-31

    申请号：PCT/US2017/061496

    申请日：2017-11-14

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： MOK, Michelle M. ,  LASKOWSKI, Carl A. ,  MCINTOSH, Lucas D. ,  LECHUGA, Hyacinth L. ,  GILLARD, Timothy M. ,  WALLER, Clinton P. Jr.

    IPC: B01D71/80 ,  B01D67/00 ,  C08F297/04 ,  C08F299/02

    Abstract: The present disclosure provides a porous membrane made of pentablock copolymer. The porous membrane includes an ABCBA block copolymer and has a number of pores. The A block is immiscible with each of the B block and the C block, the B block has a glass transition temperature (T g ) of 90 degrees Celsius or greater, and the C block has a T g of 25 degrees Celsius or less. The A block comprises a poly(alkylene oxide), a substituted epoxide, a polylactam, or a substituted carbonate; B block comprises a vinyl aromatic monomer or a polyalkylmethacrylate and C block comprises a polyacrylate, a polysiloxane or a polyisoprene. A method of making a porous membrane is also provided. The method includes forming a film or a hollow fiber from a solution including a solvent and solids containing an ABCBA block copolymer. The method further includes removing at least a portion of the solvent from the film or the hollow fiber and contacting the film or the hollow fiber with a nonsolvent.

    POROUS MEMBRANES INCLUDING TRIBLOCK COPOLYMERS
    3.
    发明申请
    POROUS MEMBRANES INCLUDING TRIBLOCK COPOLYMERS 审中-公开

    公开(公告)号：WO2020194193A1

    公开(公告)日：2020-10-01

    申请号：PCT/IB2020/052772

    申请日：2020-03-24

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： MOK, Michelle M. ,  GILLARD, Timothy M. ,  LASKOWSKI, Carl A. ,  MCINTOSH, Lucas D. ,  LECHUGA, Hyacinth L.

    IPC: B01D67/00 ,  B01D69/02 ,  B01D71/80

    Abstract: A porous membrane, The porous membrane includes a triblock copolymer of the formula ABC, the porous membrane comprising a plurality of pores; wherein the A block has a T g of 90 degrees Celsius or greater and is present in an amount ranging from 30% to 80% by weight, inclusive, of the total block copolymer; wherein the B block has a T g of 25 degrees Celsius or less and is present in an amount ranging from 10% to 40% by weight, inclusive, of the total block copolymer and wherein the C block is a water miscible hydrogen-bonding block immiscible with each of the A block and the B block; wherein the porous membrane comprising a first major surface and an opposed second major surface, wherein the first major surface is a nanostructured surface.

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