Primer compositions

Claim 1

A METAL BASE HAVING ADHERED THERETO A BAKED FILM OF PRIMER COMPRISING A RESIN MIXTURE CONSISTING ESSENTIALLY OF FROM 75-85% BY WEIGHT OF A VINYL COPOLYMER COMPONENT, AT LEAST 15% BY WEIGHT BASED ON THE WEIGHT OF SAID VINYL COPOLYMER COMPONENT BEING CONSTITUTED BY A COPOLYMER OF 67-91 MOL PERCENT VINYL HALIDE, A CARBOXYLIC MONOMER SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC A,B-MONOETHYLENICALLY UNSATURATED CARBOXYLIC ACIDS, CARBOXYLIC ACID ANHYDRIDES AND PARTIAL ALKYL ESTERS OF SAID ACIDS, SAID CARBOXYLIC MONOMER BEING PRESENT IN SAID COPOLYMER IN AN AMOUNT TO PROVIDE FROM ABOUT 0.15 MOL PERCENT TO ABOUT 5.0 MOL PERCENT OF FREE CARBOXYL RADICAL IN SAID VINYL COPOLYMER COMPONENT, THE BALANCE OF THE MONOMERS CONSTITUTING SAID CARBOXYL-CONTAINING COPOLYMER BEING MONO-OLEFINICALLY UNSATURATED MONOMER COPOLYMERIZABLE WITH VINYL HALIDE AND IN WHICH THE SOLE REACTIVE ENTITY IS THE OLEFINIC UNSATURATION THEREOF AND SAID CARBOXYL-CONTAINING COPOLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM 6,000 TO 20,000, ANY BALANCE OF SAID VINYL COPOLYMER COMPONENT BEING A COPOLYMER HAVING A MOLECULAR WEIGHT ABOVE 20,000 AND CONSTITUTED BY FROM 92-97 MOL PERCENT VINYL HALIDE WITH THE BALANCE OF THE MONOMERS CONSTITUTING SAID LAST-NAMED COPOLYMER BEING SAID MONO-OLEFINICALLY UNSATURATED MONOMER, THE BALANCE OF SAID RESIN MIXTURE BEING AN ALKALINE-CONDENSED CONDENSATION PRODUCT OF FROM .75-.95 MOL OF FORMALDEHYDE WITH 1 MOL OF AN AT LEAST TRIFUNCTIONAL BISPHENOL, SAID BAKED FILM OF PRIMER HAVING A TOPCOAT ADHERED THERETO, SAID TOPCOAT COMPRISING A FUSED LAYER OF FLUID RESIN