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公开(公告)号：US10781279B2
公开(公告)日：2020-09-22
申请号：US16341561
申请日：2017-11-17
摘要： Novel pentablock polymers of the formula ABCBA are provided wherein C is a glassy aromatic block having a Tg of >70° C.; B is a rubber block having a Tg
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公开(公告)号：US20240226820A1
公开(公告)日：2024-07-11
申请号：US18553957
申请日：2022-04-01
CPC分类号： B01D71/80 , B01D69/02 , B01D69/08 , B01D71/26 , B01D71/46 , C08F297/046 , C08F297/048 , B01D2325/36
摘要： 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.
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3.发明公开公开(公告)号：US20240066473A1
公开(公告)日：2024-02-29
申请号：US17766395
申请日：2020-12-08
发明人： Clinton P. Waller, Jr. , Michelle M. Mok , Lucas D. McIntosh , Timothy M. Gillard , Carl A. Laskowski , Hyacinth L. Lechuga
CPC分类号： B01D69/02 , B01D71/80 , B01D71/26 , B01D71/281 , B01D71/521 , B01D71/5211 , B01D71/283 , B01D69/12 , B01D67/0013 , B01D2325/0212 , B01D2325/04 , B01D2325/02832 , B01D2325/02833
摘要： The present disclosure provides an article including an isoporous membrane disposed on a porous substrate. The iso-porous membrane includes a triblock copolymer or a pentablock copolymer. The isoporous membrane has a thickness and is isoporous throughout its thickness. A method of making an article is also provided, which does not require a solvent exchange process. The method includes depositing a composition on a porous substrate, thereby forming a fdm, and removing at least a portion of the solvent from the film, thereby forming an isoporous membrane having numerous pores. The composition contains a solvent and solids including a triblock copolymer or a pentablock copolymer. The article advantageously can be hydrophilic and provides sharp molecular weight cut-offs and high flux.
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公开(公告)号：US11167251B2
公开(公告)日：2021-11-09
申请号：US16339832
申请日：2017-11-14
发明人： Michelle M. Mok , Carl A. Laskowski , Lucas D. McIntosh , Hyacinth L. Lechuga , Timothy M. Gillard , Clinton P. Waller, Jr.
摘要： 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.
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公开(公告)号：US10889692B2
公开(公告)日：2021-01-12
申请号：US16477741
申请日：2018-02-13
IPC分类号： C08J5/18 , C08F297/00 , C08G81/02
摘要： Described is a triblock copolymer of the formula ABC wherein B is a hydrogenated vinyl aromatic block having a Tg of ≥110° C. and comprising 30-90 wt. % of the copolymer; C is a rubbery block having a Tg≤25° C. and comprising 10-70 wt. % of the copolymer; and A is an block derived from ring-opening polymerization, substantially incompatible with both B and C blocks.
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公开(公告)号：US20190322788A1
公开(公告)日：2019-10-24
申请号：US16341561
申请日：2017-11-17
摘要： Novel pentablock polymers of the formula ABCBA are provided wherein C is a glassy aromatic block having a Tg of >70° C.; B is a rubber block having a Tg
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公开(公告)号：US11466115B2
公开(公告)日：2022-10-11
申请号：US16982258
申请日：2019-05-29
摘要： A porous membrane includes a triblock copolymer of the formula ABC. B is a hydrogenated vinyl aromatic block present in a range from 30 to 90 weight percent, based on the total weight of the copolymer and has a Tg of ≥110° C. C is a rubbery block present in a range from 10 to 70 weight percent, based on the total weight of the copolymer and has a Tg≤25° C. A is substantially incompatible with both the B and C blocks and is derived from ring-opening polymerization. B+C is present in a range from 70 to 95 weight percent, based on the total weight of the copolymer.
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公开(公告)号：US20220088546A1
公开(公告)日：2022-03-24
申请号：US17425409
申请日：2020-03-24
发明人： Michelle M. Mok , Timothy M. Gillard , Carl A. Laskowski , Lucas D. McIntosh , Hyacinth L. Lechuga
摘要： 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 Tg 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 Tg 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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公开(公告)号：US20210205765A1
公开(公告)日：2021-07-08
申请号：US17059545
申请日：2019-07-03
摘要： An isoporous membrane includes a multiblock copolymer film. The multiblock copolymer is crosslinked, and the film has a toughness of at least 50 kJ/m3 as a free-standing film when wet, as measured by integrating the area under a stress-strain curve for the film. Methods of forming isoporous membranes are also included.
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公开(公告)号：US20200047135A1
公开(公告)日：2020-02-13
申请号：US16339832
申请日：2017-11-14
发明人： Michelle M. Mok , Carl A. Laskowski , Lucas D. McIntosh , Hyacinth L. Lechuga , Timothy M. Gillard , Clinton P. Waller, JR.
摘要： 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.
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