Method for preparing polyetherimides

Abstract

Abstract 1. A METHOD FOR MAKING POLYETHERIMIDE CONSISTING ESSENTIALLY OF CHEMICALLY COMBINED UNITS OF THE FORMULA -(1,3-DI(O=)-ISOINDOL-2, -YLENE)-O-R-O-(1,3-DI(O=)- ISOINDOL- ,2-YLENE)-R1- WHICH COMPRISES (1) EFFECTING REACTION BETWEEN SUBSTANTIALLY EQUAL MOLAR AMOUNTS OF AN ALKALI METAL SALT OF A DIHYDRIC PHENOL OF THE FORMULA MOROM, AND A BISMIDE OF THE FORMULA, DI(1,3-DI(O=),(F-)-ISOINDOL-2-YL-)-R1 AND X IS A WHOLE NUMBER FROM 1 TO 5 INCLUSIVE, M IS 0 OR 1, AND M IS AN ALKALI METAL ION. -O-, -CO-, -SO2-, -S-, -H2XCX- WHERE Q IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF -(PHENYLENE)-(Q)M-(PHENYLENE)- IN THE PRESENCE OF A DIPOLAR AROTIC ORGANIC SOLVENT AT A TEMPERATURE OF UP TO ABOUT 100* C., (2) THEREAFTER EFFECTING THE PRECIPITATION OF THE POLYETHERIMIDE FROM THE MIXTURE OF (1), (3) AND RECOVERING THE POLYETHERIMIDE FROM THE MIXTURE OF (2), WHERE R IS DIVALENT AROMATIC ORGANIC RADICAL HAVING FROM ABOUT 6-30 CARBON ATOMS, R1 IS A DIVALENT ORGANIC RADICAL SELECTED FROM THE CLASS CONSISTING OF (A) AROMATIC HYDROCARBON RADICALS HAVING FROM 6-20 CARBON ATOMS AND HALOGENATED DERIVATIVES THEREOF, (B) ALKYLENE RADICALS, C(1-8) ALKYLENE TERMINATED POLYDIORGANOSILOXANE, CYCLO-ALKYLENE RADICALS HAVING FROM 3-20 CARBON ATOMS, AND (C) DIVALENT RADICALS INCLUDED BY THE FORMULA,

Inventors

• 👤 F Williams

Bibliographic Details