Dow Global Technolgoies LLC

Ddp Speciality Electronic Materials Us, LLC

Robert C Cieslinski

Ian A Tomlinson

Steven Douglas Jons

Scott T Matteucci

Abhishek Roy

Tina L Arrowood

XiaoHua Qiu

Mary Anne Leugers

Chan Han

Mou Paul

Steven Rosenberg

David D Hawn

Chengli Zu

Mark Alan Rickard

Bruce B Gerhart

Martin H Peery

Suh Joon Han

Michael S Paquette

Shu Chen

Scott Hanley Wasserman

Giuseppe Vairo

David F Pawlowski

Huang Wu

Brian C Nickless

Mike S Paquette

Dongkyu Kim

Anand S Badami

Derek M Stevens

Xiao-Hua Qiu

Scott H Wasserman

Mark A Rickard

Luigi Bertucelli

Shu Tao Chen

F Pawlowski David

A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing: i) an azo (&#x2014;N&#x2550;N&#x2014;) content of from 0.40% to 1.00%, as measured by pyrolysis gas chromatography; and ii) a dissociated carboxylate content of at least 0.40 mol/kg as measured by RBS at pH 9.5.

Composite polyamide membrane having azo content and high acid content

A method for making a composite polyamide membrane including a porous support and a thin film polyamide layer including the steps of applying a polyfunctional amine monomer and a combination amine-reactive compounds to a surface of the porous support and reacting the constituents to form a thin film polyamide layer, wherein the amine-reactive compounds include: i) a polyfunctional amine-reactive monomer including two to three amine-reactive moieties selected from acyl halide, sulfonyl halide and anhydride, ii) a polyfunctional amine-reactive monomer including at least four amine-reactive moieties selected from acyl halide, sulfonyl halide and anhydride, and iii) an acid compound including at least on carboxylic acid moiety or salt thereof and at least one amine-reactive moiety selected from acyl halide and sulfonyl halide.

Membrane derived from polyfunctional amine and combination of different polyfunctional amine-reactive monomers

A method for making a composite polyamide membrane comprising a porous support and a thin film polyamide layer, wherein the method includes the step 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 step of applying the polyfunctional acyl halide monomer to the porous support includes the step of combining the polyfunctional acyl halide monomer with a non-polar solvent at a concentration of at least 0.18 weight percent to form a coating solution which is applied to the surface of the porous support, and wherein the interfacial polymerization is conducted in the presence of a tri-hydrocarbyl phosphate compound which is provided in a molar ratio of at least 0.5:1 with the polyfunctional acyl halide monomer. Many additional embodiments are described including membranes made from the subject method and applications for such membranes.

Composite polyamide membrane

A thin film composite polyamide membrane having a porous support and a thin film polyamide layer comprising a reaction product of m-phenylene diamine (mPD) and trimesoyl chloride (TMC), characterized by the thin film polyamide layer having a critical strain value of less than 10%. In another embodiment, the thin film polyamide layer has a modulus of greater than 0.75 (GPa). In yet another embodiment, the thin film polyamide layer has an equilibrium swelling value of at least 45%. In another embodiment, the thin film polyamide layer has a thickness of at least 230 nm.

Composite polyamide membrane with improved structure

A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing: i) an azo (&#x2014;N&#x2550;N&#x2014;) content of from 0.30% to 0.80%, as measured by pyrolysis gas chromatography; and ii) a dissociated carboxylate content of at least 0.18 mol/kg as measured by RBS at pH 9.5.

Composite polyamide membrane having high acid content and low azo content

A thin film composite membrane including a porous support and a thin film polyamide layer characterized by having a dissociated carboxylate content of at least 0.45 moles/kg at pH 9.5 and a method for making a composite polyamide applying a polar solution comprising a polyfunctional amine monomer and a non-polar solution comprising a polyfunctional amine-reactive monomer to a surface of the porous support and interfacially polymerizing the monomers to form a thin film polyamide layer, wherein the method is characterized by the non-polar solution comprising at least 0.025 wt % of an acid compound including at least one carboxylic acid moiety and at least one amine-reactive moiety selected from acyl halide and anhydride.

Composite polyamide membrane with increased carboxylic acid functionality

A thin film composite polyamide membrane comprising a porous support and a thin film polyamide layer characterized by possessing an azo (&#x2014;N&#x2550;N&#x2014;) content of from 0.75% to 0.95%, as measured by pyrolysis gas chromatography.

Composite polyamide membrane having preferred azo content

A process for preparing oxidized graphite that provides exfoliated graphene, preferably with high surface area. The process uses considerably less chlorate than previously known systems.

Highly efficient process for manufacture of exfoliated graphene

Compositions comprising a polyolefin polymer and an expanded graphite exhibit uniform conductivity over a broad range of temperature. In one embodiment, the polyolefin polymer is polypropylene or polyethylene homopolymer or a polypropylene or polyethylene copolymer. The compositions provide uniform conductivity and can be used as a conductive formulation for medium and high voltage cable components.

Semi-conducting polymer compositions for the preparation of wire and cable

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Midland, MI, United States of America

Robert C Cieslinski