| US 7,592,047 B2 | ||
| Coating compositions for cans and methods of coating | ||
| Robert M. O'Brien, Monongahela, Pa. (US); Daniel E. Rardon, Pittsburgh, Pa. (US); Rachael Ann Spynda, Wexford, Pa. (US); George K. Bartley, III, Burgettstown, Pa. (US); and Richard H. Evans, Wexford, Pa. (US) | ||
| Assigned to Valspar Sourcing, Inc., Minneapolis, Minn. (US) | ||
| Filed on Oct. 18, 2005, as Appl. No. 11/253,161. | ||
| Claims priority of provisional application 60/620639, filed on Oct. 20, 2004. | ||
| Prior Publication US 2006/0100366 A1, May 11, 2006 | ||
| Int. Cl. B05D 7/14 (2006.01) | ||
| U.S. Cl. 427—388.1 [427/388.4] | 32 Claims |
| 1. A method of coating a food or beverage can, the method comprising:
forming a composition comprising an emulsion polymerized latex polymer, comprising:
forming a salt of an acid- or anhydride-functional polymer and an amine in a carrier comprising water to form an aqueous dispersion;
combining an ethylenically unsaturated monomer component with the aqueous dispersion; and
polymerizing the ethylenically unsaturated monomer component in the presence of the aqueous dispersion to form an emulsion
polymerized latex polymer that is substantially free of bound bisphenol A and aromatic glycidyl ether compounds; and
applying the composition comprising the emulsion polymerized latex polymer to a metal substrate prior to or after forming
the metal substrate into a food or beverage can or portion thereof.
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