Fluorocarbon polymer-polymeric adjunct coating compositions stabilized against discoloration

Claim 1

A composition suitable for making a light-colored fused fluorocarbon polymer coating, said composition consisting essentially of (a) about 25%-95%, by weight of the total of (a) and (b), of a fluorocarbon polymer polymerized or copolymerized from monomers selected from monoethylenically unsaturated hydrocarbon monomers and hydrocarbon ether monomers, said monomers being completely substituted with fluorine atoms or a combination of fluorine atoms and chlorine atoms, the polymer having a number average molecular weight of at least 20,000; (b) about 2%-75%, by weight of the total of (a), (b) and (c), of a polymer of ethylenically unsaturated monomers which depolymerizes, and whose depolymerization products vaporize in the temperature range of about 150° C. below the fusion temperature of the fluorocarbon polymer used to about the fluorocarbon polymer's decomposition temperature; the amounts of (a) and (b) totaling 100%; (c) enough of at least one compound of at least one of the metals ______________________________________ cobalt cerium iron and [bismuth] manganese ______________________________________ which compound decomposes in the temperature range of about 100° C.-500° C. to give at least 0.2%, by weight of the metal in the compound, of an oxide or hydroxide, to provide at least about 0.005 parts of metal per hundred of (a); and (d) a liquid carrier.