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US 2010/0075084 A1Published application
Coating Compositions for Cans and Methods of Coating
AssigneeValspar Sourcing, Inc.
InventorsRobert M. O'Brien, Daniel E. Rardon, Rachael Ann Spynda, George K. Bartley, III, Richard H. Evans, Howard Killilea, Carl Cavallin, Bruce G. Sicklesteel
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Abstract
A coating composition for a food or beverage can that includes an emulsion polymerized latex polymer formed by combining an ethylenically unsaturated monomer component with an aqueous dispersion of a water-dispersible polymer.
Claims21
An article, comprising:
- a body portion or end portion of a food or beverage can comprising a metal substrate;
- and
- a coating composition disposed thereon comprising an emulsion polymerized latex polymer that (i) is substantially free of bound bisphenol A and aromatic glycidyl ether compounds and (ii) comprises the reaction production of an ethylenically unsaturated monomer component batch polymerized in the presence of an aqueous dispersion of a polymer salt.
An article, comprising:
- a body portion or end portion of a food or beverage can comprising a metal substrate;
- and
- a coating composition disposed thereon comprising an emulsion polymerized latex polymer that (i) is substantially free of bound bisphenol A and aromatic glycidyl ether compounds and (ii) includes a polymerized ethylenically unsaturated component having a number average molecular weight of 100,000 or more.
A method, comprising:
- providing a composition comprising an emulsion polymerized latex polymer, wherein:
- (i) the emulsion polymerized latex polymer is substantially free of bound bisphenol A and aromatic glycidyl ether compounds, and
- (ii) the emulsion polymerized latex polymer comprises the reaction product of an ethylenically unsaturated monomer component polymerized in the presence of an aqueous dispersion of a polymer, wherein at least about 75 wt-% of the ethylenically unsaturated monomer component is present in the aqueous dispersion as unreacted monomer within a 1 hour time period during polymerization of the ethylenically unsaturated monomer component;
- and
- applying the coating composition to a metal substrate prior to or after forming the metal substrate into a food or beverage can or portion thereof.
2 more elements
Dependencies are inferred from the claim text.