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    Porous membranes including pentablock copolymers and method of making the same
    32.
    发明授权
    Porous membranes including pentablock copolymers and method of making the same 有权

    公开(公告)号：US11167251B2

    公开(公告)日：2021-11-09

    申请号：US16339832

    申请日：2017-11-14

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Michelle M. Mok ,  Carl A. Laskowski ,  Lucas D. McIntosh ,  Hyacinth L. Lechuga ,  Timothy M. Gillard ,  Clinton P. Waller, Jr.

    IPC: B01D71/80 ,  B01D69/08

    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 (Tg) of 90 degrees Celsius or greater, and the C block has a Tg 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.

    POLYMER MATRIX COMPOSITES COMPRISING AT LEAST ONE OF SOLUBLE OR SWELLABLE PARTICLES AND METHODS OF MAKING THE SAME
    33.
    发明申请
    POLYMER MATRIX COMPOSITES COMPRISING AT LEAST ONE OF SOLUBLE OR SWELLABLE PARTICLES AND METHODS OF MAKING THE SAME 有权

    公开(公告)号：US20210101132A1

    公开(公告)日：2021-04-08

    申请号：US15733081

    申请日：2018-11-15

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Clinton P. Waller, Jr. ,  Derek J. Dehn ,  Satinder K. Nayar

    IPC: B01J20/28 ,  B01J20/26 ,  C08J9/00 ,  C08J9/28

    Abstract: A polymer matrix composite comprising a porous polymeric network; and a plurality of at least one of polar solvent soluble particles or polar solvent swellable particles distributed within the polymeric network structure; wherein the polymeric network structure is insoluble relative to the soluble particles, wherein the soluble particles are present in a range from 1 to 99 weight percent, based on the total weight of the at least one of soluble particles or swellable particles and the polymer (excluding any solvent); and wherein the polymer matrix composite has particles that at least one of (a) upon exposure to a polar fluid, release at least some component from the polymer matrix composite layer or (b) upon exposure to a polar fluid, absorb some of the polar fluid; and methods for making the same. The polymer matrix composites are useful, for example, in delivery devices comprising the polymer matrix composite, wherein the at least one of soluble particles or swellable particles comprise at least one of an active agent or a released agent.

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