Dendritic oxygen scavenging polymer
View Patent ↗An oxygen-scavenging composition is provided that includes an oxygen-scavenging polymer and a catalyst. The oxygen-scavenging polymer, which in preferred embodiments is suitable for use in packaging articles, is a dendritic polymer having one or more oxygen-scavenging groups.
1. An article for packaging a food or beverage product, the article comprising:
one or more layers of a composition comprising:
a dendritic polymer, which includes an oxygen-scavenging dendritic portion having a degree of branching of at least 0.2, and a plurality of oxygen-scavenging groups located at or near terminal units of the dendritic portion; and
an oxidation catalyst configured to catalyze an oxygen-scavenging reaction with the oxygen-scavenging groups of the dendritic polymer to reduce oxygen contamination of the packaged food or beverage product.
2. The article of claim 1 , wherein the dendritic portion has a degree of branching of at least 0.4.
3. The article of claim 1 , wherein the dendritic polymer comprises a polyamide, polyester, polyether, polyolefin, vinylic polymer, polyimine, polysiloxane, polyurethane, polythioether, polyarylalkylenes, polysilane, polycarbonate, polysulfone, polyimide, polyesterimide, polyesteramide, a mixture thereof, or a copoloymer thereof.
4. The article of claim 1 , wherein the dendritic polymer comprises a polyester.
5. The article of claim 1 , wherein the dendritic polymer comprises at least about 0.5 weight percent of the article.
6. The article of claim 1 , wherein the dendritic polymer also includes a non-dendritic portion.
7. The article of claim 1 , wherein at least one of the oxygen-scavenging groups is attached to at least one other portion of the dendritic portion by an amide, carbonate, carbonate ester, ester, ether, urea, urethane, a substituted or unsubstituted hydrocarbon linking group, or a combination thereof.
8. The article of claim 1 , wherein at least one of the oxygen-scavenging groups comprises an organic group having at least one carbon-carbon double bond, an organic group that is a reaction product of metaxylene diamine, or a mixture thereof.
9. The article of claim 1 , wherein the one or more layers comprise a coating disposed on a surface of the article.
10. The article of claim 9 , wherein the coating comprises a solution-based coating or a dispersion-based coating.
11. The article of claim 9 , wherein the article comprises a bottle, and wherein the surface of the article comprises an inner surface of the bottle.
12. The article of claim 1 , wherein the oxidation catalyst comprises a transition metal, a complex of a transition metal, a photoinitiator, or a mixture thereof.
13. The article of claim 1 , wherein the dendritic portion has a globular morphology.
14. The article of claim 1 , wherein the article comprises a film or a container.
15. The article of claim 1 , wherein the composition comprises a thermoplastic composition or a thermosetting composition.
16. An article coating for use in packaging a food or beverage product, the article coating comprising:
a polymer having a dendritic portion, wherein the dendritic portion has a degree of branching of at least 0.2, and a plurality of oxygen-scavenging groups located at or near terminal units of the dendritic portion; and
an oxidation catalyst configured to catalyze an oxygen-scavenging reaction with the oxygen-scavenging groups of the polymer to reduce oxygen contamination of the packaged food or beverage product.
17. The article coating of claim 16 , wherein the dendritic portion has a degree of branching of at least 0.4.
18. The article coating of claim 16 , wherein the polymer also includes a non-dendritic portion.
19. The article coating of claim 16 , wherein at least one of the oxygen-scavenging groups is attached to at least one other portion of the dendritic portion by an amide, carbonate, carbonate ester, ester, ether, urea, urethane, a substituted or unsubstituted hydrocarbon linking group, or a combination thereof.
20. The article coating of claim 16 , wherein at least one of the oxygen-scavenging groups comprises an organic group having at least one carbon-carbon double bond, an organic group that is a reaction product of metaxylene diamine, or a mixture thereof.
21. The article coating of claim 16 , wherein the dendritic portion has a globular morphology.
22. The article coating of claim 16 , wherein the article coating comprises a solution-based coating or a dispersion-based coating.
23. The article coating of claim 16 , wherein the oxidation catalyst comprises a transition metal, a complex of a transition metal, a photoinitiator, or a mixture thereof.