U.S. 7,858,162 B2 PPG Industries has been granted a patent for a food can coated at least in part on the interior with a composition comprised of a greater than 7% weight, based on total solids weight, of an acrylic polymer having a weight average molecular weight of greater than or equal to 60,000 and an acid value of <30 mg KOH/g; and a crosslinker, wherein the composition is substantially epoxy-free and substantially polyester-free. Source: coatingsworld
Source:
http://www.coatingsworld.com/issues/2012-05/view_patents/ppg-industries-patents-food-cans-coated-with-an-acrylic-polymer-composition/
