Patent ID: 6994888

Claim:
A metal can protective coating composition in an organic liquid carrier comprising a polymeric film forming binder, the polymeric binder comprising by weight: (a) 50 to 100% of an epoxy-polyester block copolymer being the reaction product of a preformed epoxy resin and a preformed carboxyl functional polyester prepolymer, having a residue of carboxy functional polyester esterified with the residue of the epoxy resin and (b) 0 to 50% of a crosslinker where the sum of (a) and (b) is 100%, characterized in that the carboxyl functional polyester prepolymer is the reaction product of one or more polyols with one or more dicarboxylic acids or their anhydrides, where the dicarboxylic acids or anhydrides comprise a mixture of (i) 20% to 45% of an aromatic dicarboxylic acid or its anhydrides, (ii) 55 to 80% of cyclohexane dicarboxylic acid, and (iii) 0 to 10% other aliphatic dicarboxylic acid, where the sum of (i), (ii), and (iii) is 100% based on the weight of the dicarboxylic acid and anhydride components, whereby protective coatings from the protective coating composition have an amount of bisphenol A diglycidyl ether (BADGE) of less than 1 ppm.