Patent ID: 8618225
Filing Date: 2013-12-31
Classification: B01J,C08G,Y02P

Abstract:
1. A process for preparing polyamides by reacting starting monomers selected from the group consisting of dicarboxylic acids and diamines, salts of dicarboxylic acids and diamines, amino carboxylic acids, amino nitriles, lactams and mixtures thereof, in the presence of water and/or of functionalizing compounds capable of attaching to carboxyl or amino groups, wherein the functionalizing compounds are selected from the group consisting of: branching monomers having at least three carboxyl or amino groups, monomers capable of attaching to carboxyl or amino groups, and having functional groups selected from hydroxyl, ether, ester, amide, imine, imide, halogen, cyano and nitro groups, and polymer blocks capable of attaching to carboxyl or amino groups, which process comprises performing the reaction in an ionic liquid as solvent without use of additional accelerants, wherein the ionic liquid is ethylmethylimidazolium diethylphosphate (EMIM DEP), methylmethylimidazolium dimethylphosphate (MMIM DMP) or a mixture thereof, and wherein the reaction is carried out at a temperature in the range from 130° C. to 170° C.