公开(公告)号：US10829594B2

公开(公告)日：2020-11-10

申请号：US16067295

申请日：2016-12-29

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Thomas Link Guggenheim ,  Karthik Venkataraman

IPC: C08G73/10 ,  C08G73/00

Abstract: A method of making a polyetherimide comprising: reacting an aromatic bis(ether anhydride) with an aromatic diamine in a solvent to form a first solid/liquid mixture having a first solids content within 5% of a first target solids content; cooling the first solid/liquid mixture to a temperature within 5% of a target temperature; separating a portion of the liquid component from the cooled first solid/liquid mixture to form a second solid/liquid mixture having a second solids content within 10% of a second target solids content; and melt polymerizing the second solid/liquid mixture to form the polyetherimide.

公开(公告)号：US10793675B2

公开(公告)日：2020-10-06

申请号：US16302428

申请日：2017-05-23

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Thomas Link Guggenheim ,  Nitin Vilas Tople ,  Karthik Venkataraman

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.