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:
Jul. 02, 2013
Filed:
Apr. 15, 2008
Takeo Fukui, Tokyo, JP;
Tetsuo Mizuniwa, Tokyo, JP;
Kazuhiko Tokunaga, Kitakyushu, JP;
Masako Yasutomi, Kitakyushu, JP;
Takeo Fukui, Tokyo, JP;
Tetsuo Mizuniwa, Tokyo, JP;
Kazuhiko Tokunaga, Kitakyushu, JP;
Masako Yasutomi, Kitakyushu, JP;
Kurita Water Industries Ltd., Tokyo, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A method for manufacturing an anion exchange resin, in which remaining of impurities and generation of decomposition products are suppressed and leachables are reduced, the method including the following steps (1-a) to (1-e) of: (1-a) obtaining a cross-linked copolymer by copolymerizing a monovinyl aromatic monomer and a cross-linkable aromatic monomer; (1-b) specifying the content of a specific leachable compound to be 400 μg or less relative tog of the cross-linked copolymer; (1-c) haloalkylating the cross-linked copolymer so as to introduce 80 percent by mole or less of haloalkyl group relative to the monovinyl aromatic monomer; (1-d) removing a specific leachable compound from the haloalkylated cross-linked copolymer; and (1-e) subjecting the haloalkylated cross-linked copolymer to a reaction with an amine compound.