Process for the production of polyamides from cyclic lactams in pearly form

Claim 1

PROCESS FOR THE PRODUCTION OF POLYAMIDES IN PEARLY FORM WHICH COMPRISES SUSPENDING A MONMERIC POLYMERIZABLE MONOCYCLIC LACTAM OF AN ALAIPHATIC W-AMINO CARBOXYLIC ACID WITH 7 TO 12 RING MEMBERS IN AN INERT ORGANIC SUSPENSION AGENT, IN WHICH SAID LACTAM IS SUBSTANTIALLY INSOLUBLE, SELECTED FROM THE GROUP CONSISTING OF LONG-CHAIN SATURATED ALIPHATIC HYDROCARBONS, A TECHNICAL MIXTURE OF SUCH HYDROCARBONS, A MIXTURE OF SUCH HYDROCARBONS WITH A SOLVENT AND A SSILICONE OIL, ADDING TO THAT LACTAM SUSPENSION A BASIC LACTAM POLYMERIZING CATALYST SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ALKALI METAL AND ALKALINE EARTH METAL HYDRIDES, ALKALI METAL CARBONATES AND ALKALI METAL SALTS OF PHENOLS AND CARBOXYLIC ACIDS, A LACTAM POLYMERIZING ACCELERATOR SELECTED FROM THE CONSISTING OF ORGANIC ISOCYANATES, CARBODIIMIDES, AND CYANAMIDES, AND A FINELY DIVIDED DISPERSION AGENT SELECTED FROM THE GROUP CONSISTING OF POLYAMIDE POWDER AND FINELY DIVIDED TALCUM, AGITATING THE SUSPENSION AND HEATING SAID SUSPENSION TO A TEMPERATURE ABOVE THE MELTING POINT OF THE LACTAM BUT BELOW THE SOFTENING POINT OF THE POLYAMIDE.