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:
Apr. 04, 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);
David D. Hawn, Midland, MI (US);
Steven D. Jons, Eden Prairie, MN (US);
Mou Paul, Edina, MN (US);
Martin H. Peery, Bloomington, MN (US);
XiaoHua Qiu, Midland, MI (US);
Steven Rosenberg, Shorewood, MN (US);
Ian A. Tomlinson, Midland, MI (US);
Chengli Zu, Midland, MI (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
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.