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:
Mar. 18, 2014
Filed:
Jul. 11, 2008
Shinya Nishiyama, Osaka, JP;
Naoki Kurata, Osaka, JP;
Takahisa Konishi, Osaka, JP;
Yuuji Yamashiro, Osaka, JP;
Kouji Maruyama, Osaka, JP;
Yasuhiro Uda, Osaka, JP;
Chiaki Harada, Osaka, JP;
Shinya Nishiyama, Osaka, JP;
Naoki Kurata, Osaka, JP;
Takahisa Konishi, Osaka, JP;
Yuuji Yamashiro, Osaka, JP;
Kouji Maruyama, Osaka, JP;
Yasuhiro Uda, Osaka, JP;
Chiaki Harada, Osaka, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
It is an object of the present invention to provide a composite semipermeable membrane having an excellent resistance property to contamination, particularly an excellent resistance property to microbial contamination, and a water treatment method using the composite semipermeable membrane. The present invention relates to a composite semipermeable membrane comprising a skin layer formed on the surface of a porous support and containing a polyamide-based resin obtained by reacting a polyfunctional amine component with a polyfunctional acid halide component, wherein an antibacterial layer containing a silver-based antibacterial agent and a polymer component is formed on the skin layer directly or with other layer interposed therebetween, and the weight ratio between the silver-based antibacterial agent and the polymer component in the antibacterial layer is 55:45 to 95:5 (silver-based antibacterial agent:polymer component).