Invention Grant
- Patent Title: Method of making polyetherimide
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Application No.: US16302428Application Date: 2017-05-23
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Publication No.: US10793675B2Publication Date: 2020-10-06
- Inventor: Thomas Link Guggenheim , Nitin Vilas Tople , Karthik Venkataraman
- Applicant: SABIC GLOBAL TECHNOLOGIES B.V.
- Applicant Address: NL Bergen op Zoom
- Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
- Current Assignee Address: NL Bergen op Zoom
- Agency: Cantor Colburn LLP
- International Application: PCT/US2017/033937 WO 20170523
- International Announcement: WO2017/205335 WO 20171130
- Main IPC: C08G73/00
- IPC: C08G73/00 ; C08G73/10

Abstract:
A method of making a polyetherimide comprises: combining a bisphenol A dianhydride, p-phenylene diamine and a halogenated aromatic solvent to form a reactant solution; heating the reactant solution to a temperature of 205° C. to 330° C. at a pressure sufficient to prevent boiling to afford a reaction solution; removing water from the reaction solution; maintaining the reaction solution at a temperature of 205° C. to 330° C. and a pressure sufficient to prevent boiling for 10 minutes to 5 hours to form a product mixture comprising the polyetherimide and solvent; and isolating the polyetherimide.
Public/Granted literature
- US20190292318A1 METHOD OF MAKING POLYETHERIMIDE Public/Granted day:2019-09-26
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