Coal tar modified amine type curing agent for polyepoxides

Claim 1

A PROCESS OF MAKING A CURING AGENT CONTAINING A PLURALITY OF TERTIARY AMINO GROUPS FOR GLYCIDYL POLYETHERS OF POLYHYDRIC PHENOLS AND POLYHYDRIC ALCOHOLS, WHICH COMPRISES HEATING ONE MOL OF A POLYFUNCTIONAL ALIPHATIC AMINE CONTAINING TWO PRIMARY AMINO GROUPS AND AT LEAST ONE SECONDARY AMINO GROUP WITH TWO MOLS OF A KETONE TO 60* TO 70*C. AND MAINTAINIG THIS TEMPERATURE UNTIL THE REACTION IS COMPLETE, THEN MIXING ONE PART BY WEIGHT OF THE RESULTING PRODUCT WITH 5 TO 6 PARTS BY WEIGHT OF A LIQUID REFINED COAL TAR OBTAINED BY THE REMOVAL OF WATER, AMMONIA AND LIGHT OIL FROM CRUDE COAL TAR AND CONTAINING COMPOUNDS HAVING HYDROXYL GROUPS CAPABLE OF REACTING CHEMICALLY WITH AMINO GROUPS AND HEATING TO 60* TO 70*C. AND MAINTAINING THIS TEMPERATURE UNTIL THE REACTION OF THE SECONDARY AMINO GROUPS WITH THE HYDROXYL GROUPS PRESENT IN THE REFINED COAL TAR IS COMPLETE.