The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 2017
Filed:
Jul. 03, 2013
Dow Global Technologies Llc, Midland, MI (US);
Abhishek Roy, Edina, MN (US);
Tina L. Arrowood, Elko New Market, MN (US);
Robert C. Cieslinski, Midland, MI (US);
Derek M. Stevens, Chanhassen, MN (US);
David D. Hawn, Midland, MI (US);
Steven D. Jons, Eden Prairie, MN (US);
Mou Paul, Edina, MN (US);
Martin H. Peery, Bloomington, MN (US);
Steven Rosenberg, Shorewood, MN (US);
Ian A. Tomlinson, Midland, MI (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
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.