Method for producing polyamides
AssigneeBASF SE
InventorFaissal-Ali El Toufaili
Life of this patent
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Abstract
A process for preparing polyamides by reacting starting monomers selected from dicarboxylic acids and diamines or salts of dicarboxylic acids and diamines, amino carboxylic acids, amino nitriles, lactams and mixtures thereof, in the presence or absence of water and/or of functionalizing compounds 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.
Claims5
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.
Dependencies are inferred from the claim text.