Patent ID: 9127127
Filing Date: 2015-09-08
Classification: C08G

Abstract:
1. A method for the manufacture of a polyetherimide composition, the method comprising catalyzing the reaction of a dianhydride and an organic diamine with a guanidinium salt catalyst, optionally in the presence of a solvent, to provide the polyetherimide composition comprising a residue of the catalyst and a polyetherimide; wherein the dianhydride has the formula the diamine has the formula the polyetherimide has the formula wherein in the forgoing formulae: T is —O— or a group of the formula —O—Z—O—, wherein Z is an aromatic C R is selected from an aromatic hydrocarbon group having 6 to 27 carbon atoms, a halogenated derivative thereof, a straight or branched chain alkylene group having 2 to 10 carbon atoms, a halogenated derivative thereof, a cycloalkylene group having 3 to 20 carbon atoms, a halogenated derivative thereof, a divalent group of the formula n is an integer greater than 1; wherein the catalyst is present in an amount of 0.01 to 2 mole %, based on the moles of the diamine.