Invention Grant
- Patent Title: Method for preparing polyamide resin
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Application No.: US15100636Application Date: 2014-12-03
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Publication No.: US09657138B2Publication Date: 2017-05-23
- Inventor: Su-Jeong Lee , Dong-Hun Hyun , Hee-Jong Lee
- Applicant: GS CALTEX CORPORATION
- Applicant Address: KR Seoul
- Assignee: GS CALTEX CORPORATION
- Current Assignee: GS CALTEX CORPORATION
- Current Assignee Address: KR Seoul
- Agency: Hauptman Ham, LLP
- Priority: KR10-2013-0149324 20131203
- International Application: PCT/KR2014/011742 WO 20141203
- International Announcement: WO2015/084042 WO 20150611
- Main IPC: C08G69/20
- IPC: C08G69/20 ; C08G69/24 ; C08G69/18 ; B01D3/00 ; C08G69/16 ; C08L77/02 ; C08L79/08 ; B01D61/02 ; B01D61/36
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.
Public/Granted literature
- US20160297930A1 METHOD FOR PREPARING POLYAMIDE RESIN Public/Granted day:2016-10-13
Information query
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