Patent ID: 6599991
Filing Date: 2003-07-29
Classification: C08L,G03C

Abstract:
A method for blending poly(ether imide)s with polyesters or copolyesters comprising:(a) adding polyester monomers and poly(ether imide) in a polymerization reactor at any point during a polyester condensation polymerization process; and (b) polymerizing the polyester monomers in the presence of the poly(ether imide) under standard condensation polymerization conditions to produce a blend; wherein the poly(ether imide)s and the polyesters are linear or branched; wherein the polyester or copolyester is selected from the group consisting of polycondensation products of monomers consisting of diacids, diester analogs and glycols; and wherein the glycol is ethlylene glycol, diethylene glycol, poly(ethylene glycol), poly(propylene glycol), cyclohexane dimethanol, butanediol, neopentyl glycol, trimethylolpropane or pentaerythritol.