Process for the improvement of shaped thermoplastic materials containing carbonamidegroups

Claim 1

THE PROCESS OF IMPROVING THE PROPERTIES OF THERMOPLASTICALLY SHAPED TEXTILE MATERIAL SELECTED FROM THE GROUP CONSISTING OF FIBERS, THREADS, FOILS AND THE FABRICS PRODUCED FROM THE SAME, SAID THERMOPLASTICALLY SHAPED TEXTILE MATERIALS BEING THERMOPLASTICALLY SHAPED FROM POLYMERS CONTAINING INTERLINEAR -CONH- GROUPS SELECTED FROM THE GROUP COSISTING OF POLYAMIDES FORMED FROM DICARBOXYLIC ACIDS AND DIAMINES, POLYAMIDES FORMED FROM CAPROLACTAM AND POLYURETHANES FORMED FROM 1,6HEXANEDIISOCYANATE AND BUTYLENE GLYCOL, WHICH COMPRISES REACTING SAID THERMOPLASTICALLY SHAPED TEXTILE MATERIALS WITH A HYDROXY-ALKYLATING AGENT SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYLENE OXIDES, GLYCIDE AND LOWER ALKYLENE HALOGENHYDRINS IN THE PRESENCE OF AN ALKALINE REACTING ALKYLATING CATALYST AT A TEMPERATURE FROM ABOUT 50*C. TO 90*C. FOR A TIME BETWEEN ABOUT 1 HOUR TO 4 HOURS AND SUFFICIENT TO ADD FROM 0.01 TO 2% BY WEIGHT OF SAID HYDROXY-ALKYLATING AGENT TO SAID INTERLINEAR -CO.NH- GROUPS IN SAID THERMOPLASTICALLY SHAPED TEXTILE MATERIALS, INTERRUPTING THE REACTION WHEN THE AMOUNT OF SAID HYDROXY-ALKYLATING AGENT ADDED FALLS WITHIN SAID RANGE, AND RECOVERING SAID THERMOPLASTICALLY SHAPED TEXTILE MATERIALS FROM SAID REACTION IN THE FORM OF THEIR ORIGINAL THERMOPLASTICALLY SHAPED STRUCTURE.