Methods of manufacture of bis(ether anhydride)s and polyetherimides

US10829449B2 · kind B2 · utility

Assignee

• SABIC GLOBAL TECHNOLOGIES B.V. · NL

Inventors

• James Patrick Schulte, II · Evansville, US
• Tarun Kumar Pal · Bengaluru, IN
• Meerakani Mohamed Ali Sait · Tirunelveli, IN

Key dates

• Filing date: Mar 27, 2017
• Grant date: Nov 10, 2020
• Expiry date: Mar 30, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K21/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method for the manufacture of a bis(ether anhydride) comprises contacting an N-substituted bis(ether phthalimide) with a base under conditions effective to ring open the imides to provide a ring-opened product; and contacting the ring-opened product with an acid under conditions effective to provide a composition comprising the bis(ether anhydride).