Methods and materials for the functionalization of polymers and coatings including functionalized polymer
First Claim
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1. An article comprising a food or beverage can, or a portion thereof, the article comprising:
- a metal substrate; and
a coating disposed on at least a portion of the metal substrate, the coating formed from a coating composition comprising an aqueous dispersion of a water-dispersible polymer, wherein the polymer includes;
a backbone having at least one heteroatom; and
a side group that includes at least one salt group, wherein the side group comprises the reaction product of an unsaturated compound having at least one salt or salt-forming group that is attached to another portion of the polymer via reaction of the unsaturated compound with one or more double or triple bonds, with the proviso that the reaction of the unsaturated compound with the one or more double or triple bonds does not require the participation of a free-radical initiator.
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Abstract
The disclosure provides a functionalized polymer for use in coating compositions and a method for making the functionalized polymer. In some embodiments, the functionalized polymer is a water-dispersible polymer, more preferably a water-dispersible polyester polymer, having one or more side groups including one or more salt groups. Packaging containers (e.g., food or beverage cans) comprising the functionalized polymer and methods of making such containers are also provided.
43 Citations
20 Claims
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1. An article comprising a food or beverage can, or a portion thereof, the article comprising:
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a metal substrate; and a coating disposed on at least a portion of the metal substrate, the coating formed from a coating composition comprising an aqueous dispersion of a water-dispersible polymer, wherein the polymer includes; a backbone having at least one heteroatom; and a side group that includes at least one salt group, wherein the side group comprises the reaction product of an unsaturated compound having at least one salt or salt-forming group that is attached to another portion of the polymer via reaction of the unsaturated compound with one or more double or triple bonds, with the proviso that the reaction of the unsaturated compound with the one or more double or triple bonds does not require the participation of a free-radical initiator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An article comprising a food or beverage can, or a portion thereof, the article comprising:
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a metal substrate; and a coating disposed on at least a portion of the metal substrate, the coating formed from a coating composition comprising an aqueous dispersion of a water-dispersible polyester polymer, wherein the polymer includes a side group that includes at least one salt group, wherein the side group comprises a Diels-Alder or an Ene reaction product of an unsaturated compound having at least one salt or salt-forming group that is attached to another portion of the polymer via reaction of the unsaturated compound with one or more double or triple bonds. - View Dependent Claims (20)
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Specification