Patent ID: 8772438

Claim:
A process for making a polyamide polymer, said process comprising: a) sparging one or more ionic liquid(s) with nitrogen for up to one hour; b) heating, in the one or more sparged ionic liquid(s), one or more polyamide precursor(s) to form the polyamide polymer, wherein the one or more polyamide precursor(s) is: (i) one or more free dicarboxylic acid(s) or ester(s) thereof, with one or more diamine(s); or (ii) one or more salt(s) of a dicarboxylic acid with a diamine; or (iii) one or more lactam(s); or (iv) mixtures of any of the foregoing precursors (i) to (iii); and c) recovering the one or more ionic liquid(s); wherein the heating is from about 3 to about 6 hours at a temperature from about 200° C. to 250° C.