Invention Grant
- Patent Title: Methods of manufacture of polyetherimides
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Application No.: US15980180Application Date: 2018-05-15
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Publication No.: US10457778B2Publication Date: 2019-10-29
- Inventor: Mani Raj Chaulagain , Thomas Link Guggenheim , Roy Ray Odle
- 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
- Main IPC: C08G73/10
- IPC: C08G73/10

Abstract:
A method of manufacture of a polyetherimide composition includes contacting a substituted phthalic anhydride and an organic diamine in the presence of diphenyl sulfone, sulfolane, or a combination comprising at least one of the foregoing solvents at a temperature of greater than 130° C. to provide a bis(phthalimide) composition comprising diphenyl sulfone, sulfolane, or a combination comprising at least one of the foregoing solvents and a bis(phthalimide); and polymerizing the bis(phthalimide) and an alkali metal salt of a dihydroxy aromatic compound in the presence of diphenyl sulfone, sulfolane, or a combination comprising at least one of the foregoing to form a polyetherimide. The method does not require any catalyst either for the imidization or the polymerization.
Public/Granted literature
- US20180258225A1 METHODS OF MANUFACTURE OF POLYETHERIMIDES Public/Granted day:2018-09-13
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