Oxygen scavenging polymers
View Patent ↗A polymer with a backbone having at least one structural unit represented by formula (I): Wherein R 1 , R 2 , R 3 , R 4 , and R 5 independently denote one of a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted alkenyl group, and n preferably denotes an integer from 1 to 10.
1. A composition comprising:
an oxygen-scavenging polymer that includes a condensation backbone having at least one structural unit represented by formula (I):
wherein R 1 , R 2 , R 3 , R 4 , and R 5 independently denote one of a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted alkenyl group, and n denotes an integer from 1 to 10; and
at least about 10 parts per million (ppm) by weight of an oxidation catalyst.
2. The composition of claim 1 , wherein R 1 denotes hydrogen.
3. The composition of claim 1 , wherein R 1 , R 2 , R 3 , R 4 , and R 5 each have less than 20 carbon atoms.
4. The composition of claim 1 , wherein R 4 and R 5 denote hydrogen.
5. The composition of claim 1 , wherein R 1 , R 2 , and R 3 each comprise less than 10 carbon atoms.
6. The composition of claim 1 , wherein n is an integer less than 5.
7. The composition of claim 1 , wherein R 1 , R 3 , R 4 , and R 5 each denote hydrogen, wherein n=1, and wherein R 2 denotes a linear substituted or unsubstituted alkyl group with 1 to 10 carbon atoms.
8. The composition of claim 7 , wherein R 2 denotes a linear alkyl group with 5 carbon atoms.
9. The composition of claim 1 , wherein the backbone is a polyester.
10. The composition of claim 1 , wherein between 1 and 30 weight percent of the polymer comprises monomers including the structural unit.
11. The composition of claim 1 , wherein between 2 and 25 weight percent of the polymer comprises monomers including the structural unit.
12. The composition of claim 1 , wherein between 10 and 20 weight percent of the polymer comprises monomers including the structural unit.
13. The composition of claim 1 , wherein the catalyst is present at a concentration from about 10 ppm to about 1000 ppm by weight.
14. The composition of claim 1 , wherein the catalyst is present at a concentration from about 300 ppm to about 600 ppm by weight.
15. The composition of claim 1 , wherein the catalyst comprises one or more transition metal complexes.
16. The composition of claim 1 , wherein the catalyst comprises the reaction product of cobalt and a long chain acid.
17. The composition of claim 1 , wherein the catalyst is selected from the group consisting of cobalt neodecanoate, cobalt stearate, and cobalt octoate.
18. The composition of claim 1 , wherein the catalyst comprises a uv-activated catalyst.
19. The composition of claim 1 , further comprising a filler, colorant, antioxidant, heat stabilizer, crystallization agent, blowing agent, or accelerant.
20. A solution comprising the composition of claim 1 and a solvent.
21. An article comprising the composition of claim 1 .
22. An article comprising a layer of the composition of claim 1 .
23. The article of claim 22 , further comprising a second layer of a second polymer.
24. The article of claim 23 , wherein the second polymer is polyethylene terephthalate.
25. The composition of claim 1 , wherein the condensation backbone comprises a polyurethane.
26. The composition of claim 1 , wherein the condensation backbone comprises a polyepoxide.
27. The composition of claim 1 , wherein the condensation backbone comprises a polyamide.
28. The article of claim 22 , wherein the article comprises a packaging article.
29. The article of claim 28 , wherein the article comprises a bottle.
30. A packaging article, comprising:
a layer of an oxygen-scavenging composition including:
an oxygen-scavenging polymer comprising a condensation backbone having at least one pendant group represented by formula (I) attached to a carbon atom of the backbone:
wherein, R 1 , R 2 , R 3 , R 4 , and R 5 independently denote one of a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted alkenyl group, and n denotes an integer from 1 to 10; and
at least about 10 parts per million (ppm) by weight of an oxidation catalyst.