Coating compositions for cans and methods of coating

CAFC
  • US 7,592,047 B2
  • Filed: 10/18/2005
  • Issued: 09/22/2009
  • Est. Priority Date: 10/20/2004
  • Status: Active Grant
First Claim
Patent Images

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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