Sanitary coating composition, process of coating metal therewith, and coated article

Claim 1

A PROCESS OF COATING A METAL SURFACE TO BE USED AS PART OF A CONTAINER FOR FOODS AND BEVERAGES AND THE LIKE, COMPRISING THE STEPS OF FILMING ON THE METAL SURFACE A LIQUID COMPOSITION CONSISTING ESSENTIALLY OF THE FOLLOWING COMPONENTS: (1) A COPOLYMER OF VINYL CHLORIDE AND VINYL ACETATE; (2) AN ORGANIC SOLVENT, AND (3) THERMOSETTING PHENOLIC RESINOID CONSISTING OF THE REACTION PRODUCT OF COCONDENSATION OF THE COMBINATION OF (1) A PHENOLIC COMPOUND WHICH IS AT LEAST TRI-FUNCTIONAL; AND (11) A DI-FUNCTIONAL PHENOLIC COMPOUND; WITH (111) FORMALDEHYDE IN THE PRESENCE OF AN ALKALINE CATALYST; SAID TRI- AND HIGHE FUNCTIONAL PHENOLIC COMPOUND (1) AND DI-FUNCTIONAL PHENOLIC COMPOUND (11) BEING IN PROPORTIONS BY WEIGHT FROM 50/50 TO 10/90, INCLUSIVE, THE MOLAR RATIO OF THE COMBINED PHENOLIC COMPOUNDS (1) AND (11) TO FORMALDEHYDE BEING 1.0/0.8 TO 1.0/1.5, INCLUSIVE, AND SAID COPOLYMER COMPONENT (1) AND RESINOID COMPONENT, (3) HAVING A SOLIDS WEIGHT RATIO FROM 98/2 TO 55/45, INCLUSIVE; SAID COPOLYMER AND RESINOID COMPONENTS (1) AND (3) BEING COMPATIBLE AND FULLY DISSOLVED IN SAID SOLVENT; AND BAKING SAID FILMED COMPOSITION ON THE METAL SURFACE UNTIL THE PHENOLIC RESINOUD THERMOSETS, SAID PHENOLIC RESINOID BEING STRATIFIED TOWARD THE METAL SURFACE ON WHICH IT IS BAKED.