Coating with a polyamide-epoxy resin

Claim 1

A PROCESS OF PROVIDING A STRIP OF METAL WITH A THIN CONTINUOUS COATING OF AN ORGANIC RESIN WHICH COMPRISES; CONTINUOUSLY APPLYING TO AT LEAST ONE SIDE OF A METAL STRIP MOVING IN A CONTINUOUS PROCESSING LINE AT A SUBSTANTIALLY CONSTANT SPEED A UNIFORM FLUID FILM OF A SOLUTION OF A POLYAMIDE RESINOUS MATERIAL CONTAINING TERMINAL AMINO GROUPS AND AN EPOXY RESINOUS MATERIAL CONTAINING TERMINAL EPOXY GROUPS DISSOLVED IN THE HALOGENATED HYDROCARBON SOLVENT HAVING A MAJOR PROPORTION THEREOF COMPOSED OF METHYLENE CHLORIDE AND SAID RESINOUS MATERIALS BEING PRESENT IN A PROPORTION OF ABOUT ONE TO FOUR PARTS BY WEIGHT OF SAID EPOXY RESINOUS MATERIAL TO ABOUT ONE PART BY WEIGHT OF SAID POLYAMIDE RESINOUS MATERIAL, SAID SOLUTION HAVING DISSOLVED THEREIN AS A BUFFERING AGENT AN AMINE HAVING A BOILING POINT HIGHER THAN SAID SOLVENT, EXPOSING SAID FLUID FILM ON SAID STRIP TO A TEMPERATURE BETWEEN ABOUT 1500*F. AND 1700*F. FOR A PERIOD ABOUT 3 TO 5 SECONDS TO EFFECT SUBSTANTIALLY IMMEDIATE AND COMPLETE CURING OF SAID FILM, AND RAPIDLY COOLING SAID FILM AND SAID STRIP TO ABOUT ROOM TEMPERATURE BY CONTACTING WITH A COOLING FLUID; WHEREBY A FULLY CURED POLYAMIDE-EPOXY RESIN COATING IS CONTINUOUSLY AND RAPIDLY FORMED IN-LINE ON SAID STRIP OF METAL.