Activators for the polymerization of 2-pyrrolidone

Claim 1

A PROCESS FOR POLMERIZING 2-PYRROLIDONE WHICH COMPRISES THE STEPS OF FORMING A MIXTURE UNDER ESSENTIALLY ANHYDROUS CONDITIONS CONTAINING MONOMERIC 2-PYRROLIDONE, A CATALYTIC AMOUNT OF AN ALKALINE POLYMERIZATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS; CARBONATES AND PYRROLIDONE SALTS OF ALKALI METALS; ALKALI METAL ALKYLS AND ARYLS; HYDRIDES, HYDROXIDES, ANDD OXIDES OF ALKALI METALS AND ALKALINE EARTH METALS; A FEW PERCENT BASED ON THE WEIGHT OF THE MIXTURE OF AN AROMATIC CARBONYL HALIDE, POLMERIZATION ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF MONOCYCLIC AROYL HALIDE, DICYCLIC AROYL HALIDE, MONOCYCLIC ALKAROYL HALIDE, DICYCLICRES ALKAROYL HALIDE, ARYL ALKYL CARBONYL HALIDE AND MIXTURES THEREOF WITH A SLIGHT EXCESS OF CATALYST OVER ACTIVATOR BEING PRESENT IN SAID MIXTURE, AND A FEW PERCENT BASED ON THE WEIGHT OF THE MIXTURE OF AN ORGANIC ACID AMIDE COMPOUND HAVING THE FOLLOWING CHEMICAL FORMULA::