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US 7,592,047 B2Granted
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
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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 salt of an acid- or anhydride-functional polymer and an amine, preferably, a tertiary amine.
Claims32
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.
4 more elements
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 a tertiary amine in a carrier comprising water to form an aqueous dispersion;
- combining an ethylenically unsaturated monomer component comprising 0.1 wt-% to 30 wt-% of an oxirane-functional alpha, beta-ethylenically unsaturated monomer with the aqueous dispersion, based on the weight of the monomer component;
- and
- polymerizing the ethylenically unsaturated monomer component in the presence of the aqueous dispersion to form an emulsion polymerized latex polymer;
- 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.
4 more elements
Dependencies are inferred from the claim text.