Styrene-free coating compositions for packaging articles such as food and beverage containers
AssigneeSwimc LLC
InventorsSebastien Gibanel, Benoit Prouvost
Life of this patent
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Abstract
A method of forming a coating on a food or beverage container, which includes spraying a coating composition onto an interior surface of the food or beverage container, where the coating composition includes an emulsion-polymerized latex copolymer having copolymer chains of one or more ethylenically-unsaturated monomers and one or more styrene offset monomers. Preferably, the coating composition is substantially free of BPA, PVC, and styrene. The method may also include curing the sprayed coating composition, thereby providing the coating on the interior surface of the food or beverage container.
Claims25
A method of forming a coating on a food or beverage container, the method comprising:
- receiving a coating composition having an emulsion-polymerized latex copolymer dispersed in an aqueous carrier, wherein the emulsion-polymerized latex copolymer is a reaction product of monomers comprising:
- one or more first ethylenically-unsaturated monomers each having one or more ethylenically-unsaturated groups;
- and
- one or more styrene offset monomers comprising:
- (i) one or more ethylenically-unsaturated, polycyclic monomers;
- (ii) one or more ethylenically-unsaturated, monocyclic monomers each having a ring structure with 3-5 atoms in the ring;
- or
- combinations thereof,
- wherein a combined concentration of (i) and (ii) constitutes at least about 10% by weight of the monomers used to produce the emulsion-polymerized latex copolymer;
- wherein the monomers used to produce the emulsion-polymerized latex copolymer are substantially free of BPA, PVC, halogenated monomers, and styrene;
- and
- applying the coating composition to a substrate prior to or after forming the substrate into a food or beverage container, or a portion thereof.
An article comprising a food or beverage container, or a portion thereof, including:
- a metal substrate;
- and
- an inside spray coating disposed on at least a portion of the metal substrate, wherein the coating is produced from an inside-spray coating composition having an emulsion-polymerized latex copolymer that is a reaction product of monomers comprising:
- one or more first ethylenically-unsaturated monomers each having one or more ethylenically-unsaturated groups;
- and
- one or more styrene offset monomers comprising:
- (i) one or more ethylenically-unsaturated, polycyclic monomers;
- (ii) one or more ethylenically-unsaturated, monocyclic monomers each having a ring structure with 3-5 atoms in the ring;
- or
- combinations thereof,
- wherein a combined concentration of (i) and (ii) constitutes at least about 10% by weight of the monomers used to produce the emulsion-polymerized latex copolymer;
- wherein the monomers used to produce the emulsion-polymerized latex copolymer are substantially free of BPA, PVC, halogenated monomers, and styrene.
An inside spray coating composition comprising:
- an aqueous carrier;
- and
- an emulsion-polymerized latex copolymer dispersed in the aqueous carrier, and comprising:
- one or more ethylenically-unsaturated monomers each having one or more ethylenically-unsaturated groups;
- and
- one or more styrene offset monomers comprising:
- (i) one or more ethylenically-unsaturated, polycyclic monomers;
- (ii) one or more ethylenically-unsaturated, monocyclic monomers each having a ring structure with 3-5 atoms in the ring;
- or
- combinations thereof,
- wherein a combined concentration of (i) and (ii) constitutes at least about 10% by weight of the monomers used to produce the emulsion-polymerized latex copolymer;
- wherein the monomers used to produce the emulsion-polymerized latex copolymer are substantially free of BPA, PVC, halogenated monomers, and styrene;
- wherein the coating composition has an average viscosity ranging from about 5 seconds to about 40 seconds, pursuant to the Viscosity Test;
- and
- wherein the coating composition has a resin solids content ranging from about 10% by weight to about 30% by weight, based on a total weight of the coating composition.
Dependencies are inferred from the claim text.