Method for making polyetherimides

Abstract

Abstract 1. A METHOD FOR MAKING A POLYETHERIMIDE WHICH COMPRISES (1) EFFECTING THE DISTILLATION OF ORGANIC AMINE OF THE FORMULA RNH2 FROM A MELT CONSISTING ESSENTIALLY OF A MIXTURE OF BISMIDE OF THE FORMULA 1,3-DI(O=),2-R,(1,3-DI(O=),2-R-ISOINDOLYL-O-R1-O-)- ISOINDOLE AND AT LEAST AN EQUAL MOLAR AMOUNF OF SUCH BISMIDE OF AN ORGANIC DIAMINE OF THE FORMULA NH2-R2-NH2 IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF AN ALKALI METAL, A BASIC ALKALI METAL COMPOUND, AN ALKALINE EARTH METAL AND A BASIC ALKALINE EARTH METAL COMPOUND, WHERE THE VAPOR PRESSURE OF THE ORGANIC AMINE IS GREATER UNDER ATMOSPHERIC CONDITIONS THAN THE VAPOR PRESSURE OF THE ORGANIC DIAMINE, WHERE R IS A MONOVALENT C(2-20) ORGANIC RADICAL SELECTED FROM C(2-8) ALKYL RADICALS AND C(6-20) AROMATIC RADICALS, R1 IS SELECTED FROM C(6-30) AROMATIC RADICALS, AND R2 IS A DIVALENT ORGANO 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(2-8) ALKYLENE TERMINATED POLYDIORGANOSILOXANE CYCLO-ALKYLENE RADICALS HAVING 2-20 CARBON ATOMS, AND (C) DIVALENT RADICALS INCLUDED BY THE FORMULA, -(PHENYLENE)-(Q)M-(PHENYLENE)- WHERE Q IS A MEMBER SELECTED FROM THE CLASS CONSISTING OF -O-, -CO-, -SO2-, -S-, -H2XCX- AND X IS A WHOLE NUMBER FROM 1 TO 5 INCLUSIVE, AND M IS 0 OR 1.

Inventors

• 👤 T Takekoshi

Bibliographic Details