Dow Global Technolgoies LLC

Ddp Specialty Electronic Materials Us, LLC

Aman A Desai

Steven Douglas Jons

Abhishek Roy

Mou Paul

Steven Rosenberg

XiaoHua Qiu

Chunming Zhang

Tina L Arrowood

Ian A Tomlinson

Joseph D Koob

XiaoHua Sam Qiu

A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method includes the steps of applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional acyl halide monomer to a surface of a porous support and interfacially polymerizing the monomers to form a thin film polyamide layer. The method is characterized by including a substituted benzamide monomer within the non-polar solution.

Composite polyamide membrane made using substituted benzamide monomer

A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer, wherein the method includes the step of applying a polyfunctional amine monomer and a tetraacyl acyl halide monomer represented by Formula (I) to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer; wherein A is selected from: oxygen (&#x2014;O&#x2014;); carbon (&#x2014;C&#x2014;); silicon (&#x2014;Si&#x2014;); each of which may be unsubstituted or substituted, e.g. with alkyl groups of 1-4 carbon atoms; or a carbonyl group (&#x2014;C(O)&#x2014;), X is the same or different and is selected from a halogen, and Y is selected from halogen and hydroxide. 

Thin film composite membrane derived from tetra-functional acyl halide monomer

A method for making a composite polyamide membrane comprising the steps of applying a polyfunctional amine monomer and polyfunctional acyl halide monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the method is includes at least one of the following steps: i) conducting the interfacial polymerization in the presence of a monomer comprising at least one phosphorous-containing functional group or salt thereof and an at least one amine-reactive functional group; and/or ii) applying such a monomer to the thin film polyamide layer.

Composite polyamide membrane derived from monomer including amine-reactive and phosphorous-containing functional groups

A method for making a composite polyamide membrane including the steps of applying a polyfunctional amine monomer and polyfunctional acyl halide monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the method is includes at least one of the following steps: i) conducting the interfacial polymerization in the presence of a subject monomer comprising at least one carboxylic acid group linked to an aromatic moiety and wherein the aromatic moiety is further substituted with at least one of an acyl halide or anhydride functional group and ii) applying the subject monomer to the thin film polyamide layer. The invention includes many additional embodiments.

Composite polyamide membrane

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Midland, MI, United States of America

Aman A Desai