Oxygen scavenging polymers
View Patent ↗A polymer with a backbone and an unsaturated side chain attached to the backbone. The polymer may optionally be combined with an oxidation catalyst and/or other ingredients.
1. A composition comprising:
an oxygen-scavenging polymer that includes:
a condensation backbone, and
an unsaturated side chain attached to the backbone, wherein the side chain includes at least one acyclic carbon-carbon double bond that does not involve the first carbon atom of the side chain; and
a cobalt oxidation catalyst.
2. The composition of claim 1 , wherein the backbone of the polymer comprises a polyester, a polyurethane, a polyepoxide, or a polyamide.
3. The composition of claim 1 , wherein the backbone comprises a polyester.
4. The composition of claim 1 , wherein the backbone comprises a polyethylene terephthalate.
5. The composition of claim 1 , wherein the polymer comprises between 1 and 30 weight percent of the side chains.
6. The composition of claim 1 , wherein the polymer comprises between 5 and 24 weight percent of the side chains.
7. The composition of claim 1 , wherein the polymer comprises between 10 and 20 weight percent of the side chains.
8. The composition of claim 1 , wherein the side chain has a single acyclic carbon-carbon double bond.
9. The composition of claim 1 , wherein the oxidation catalyst is present at a concentration of greater than about 10 ppm.
10. The composition of claim 1 , wherein the oxidation catalyst is present at a concentration of between about 100 ppm and about 1,000 ppm by weight.
11. The composition of claim 1 , wherein the catalyst is present at a concentration between about 300 ppm and about 600 ppm by weight.
12. The composition of claim 1 , wherein the oxidation catalyst comprises the reaction product of cobalt and a long chain acid.
13. The composition of claim 1 , further comprising a filler, colorant, antioxidant, heat stabilizer, crystallization agent, blowing agent, or accelerant.
14. The composition of claim 1 , further comprising one or more additional polymers.
15. A composition comprising:
an oxygen-scavenging polymer that comprises a polyester, a polyurethane, a polyepoxide, or a polyamide, wherein:
the oxygen-scavenging polymer has an unsaturated side chain attached to a backbone, and
the side chain includes at least one acyclic carbon-carbon double bond that does not involve the first carbon atom of the side chain; and
a cobalt oxidation catalyst that includes cobalt.
16. The composition of claim 15 , wherein the cobalt oxidation catalyst is present at a concentration from greater than 10 ppm to less than 1,000 ppm.
17. The composition of claim 15 , wherein the cobalt oxidation catalyst comprises the reaction product of cobalt and a long chain acid.
18. The composition of claim 15 , wherein the cobalt oxidation catalyst comprises cobalt neodecanoate.
19. The composition of claim 15 , wherein the oxygen-scavenging polymer is a polyester.
20. The composition of claim 15 , wherein the polymer is a polyethylene terephthalate.