US Patent 9657138 Method for preparing polyamide resin
Patent 9657138 was granted and assigned to GS Caltex on May, 2017 by the United States Patent and Trademark Office.
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Patent abstract
The present invention relates to a method for preparing a polyamide resin, comprising the steps of: (a) preparing a polyamide polymer by anionically polymerizing a monomer including 2-pyrrolidone; (b) refining an unreacted monomer and a catalyst in the polyamide polymer with water; (c) pH-controlling through an ion exchange of the refined water; and (d) recovering the unreacted monomer by concentrating the pH-controlled water.
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Patent Inventor Names
Dong-Hun Hyun0
Hee-Jong Lee0
Su-Jeong Lee0
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US Patent 09657138 Method for preparing polyamide resin US Patent 9657138 Method for preparing polyamide resin
Infobox
Patent Number
096571380
Patent Number
96571380
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Infobox
Is a
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
096571380
Date of Patent
May 23, 2017
0Patent Application Number
151006360
Date Filed
December 3, 2014
0Official Website
Patent Primary Examiner
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US Patent 09657138 Method for preparing polyamide resin
Infobox
Is a
Patent applicant
Current assignee
Patent jurisdiction
Patent number
09657138
Date of patent
May 23, 2017
Patent application number
15100636
Date Filed
December 3, 2014
Patent primary examiner
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