Oxygen scavenging additives for plastic containers
View Patent ↗The present invention provides a composition comprising: a base polymer; at least one compound having the structure of Formula I or II wherein Ar is an o-, m-, or p-phenylene moiety, a substituted phenylene moiety, or a naphthalene moiety; R 1 and R 2 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, and aryl; and X is O or —(CH 2 ) n —; n=0, 1, or 2; and p=0, 1, or 2; and; and at least one transition metal in a positive oxidation state, said metal being present in the composition in an amount of from about 10 to about 400 ppm, wherein said compound is present in an amount of from about 0.10 to about 10 weight percent of the composition.
1. A composition comprising:
a) a base polymer;
b) at least one non-polymeric oxidizable organic compound having the structure of Formula I or II:
wherein:
Ar is an o-, m-, or p-phenylene moiety, a substituted phenylene moiety, or a naphthalene moiety;
R 1 and R 2 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, and aryl;
X is O or —(CH 2 ) n —; and
n=0, 1, or 2;
p=0, 1, or 2; and
c) at least one transition metal in a positive oxidation state, said metal being present in the composition in an amount of from about 10 to about 400 ppm,
wherein said compound is present in an amount of from about 0.10 to about 10 weight percent of the composition.
2. The composition of claim 1 , wherein said at least one transition metal is cobalt.
3. The composition of claim 2 wherein said at least one transition metal further comprises zinc.
4. The composition of claim 1 wherein said base polymer comprises a polyester polymer.
5. The composition of claim 4 wherein the polyester polymer is polyethylene terephthalate.
6. The composition of claim 1 wherein the compound is present in an amount of about 1 to about 10 weight percent based on the weight of the composition.
7. The composition of claim 1 wherein the compound is present in an amount of about 1 to about 5 weight percent based on the weight of the composition.
8. The composition of claim 1 wherein the compound is present in an amount of about 1 to about 3 weight percent based on the weight of the composition.
9. The composition of claim 1 wherein the concentration of transition metal is 30 to 150 ppm.
10. The composition of claim 1 wherein the non-polymeric oxidizable organic compound is m-xylylene-bis-(tetrahydrophthalimide):
11. The composition of claim 1 wherein the non-polymeric oxidizable organic compound is m-xylylene-bis-citraconimide:
12. A composition comprising:
a) polyethylene terephthalate;
b) m-xylylene-bis-(tetrahydrophthalimide):
c) at least one transition metal in a positive oxidation state, said metal being present in the composition in an amount of from about 10 to about 400 ppm,
wherein the m-xylylene-bis-(tetrahydrophthalimide) is present in an amount of from about 0.10 to about 10 weight percent of the composition.
13. The composition of claim 12 , wherein said at least one transition metal is cobalt.
14. The composition of claim 13 wherein the concentration of transition metal is 30 to 150 ppm.
15. A wall for a package comprising at least one layer, said layer comprising a composition, said composition comprising:
a) a base polymer;
b) at least one compound having the structure of Formula I or II
wherein:
Ar is an o-, m-, or p-phenylene moiety, a substituted phenylene moiety, or a naphthalene moiety;
R 1 and R 2 are independently selected from the group consisting of: hydrogen, alkyl, alkenyl, and aryl; and
X is O or —(CH 2 ) n —; and
n=0, 1, or 2;
p=0, 1, or 2; and
c) at least one transition metal in a positive oxidation state, said metal being present in the composition in an amount of from about 10 to about 400 ppm,
wherein said compound is present in an amount of from about 0.10 to about 10 weight percent of the composition.
16. The wall of claim 15 , wherein said at least one transition metal is cobalt.
17. The wall of claim 16 wherein said at least one transition metal further comprises zinc.
18. The wall of claim 15 wherein said base polymer comprises a polyester polymer.
19. The wall of claim 18 wherein the polyester polymer is polyethylene terephthalate.
20. The wall of claim 15 wherein the compound is present in an amount of about 1 to about 10 weight percent based on the weight of the composition.
21. The wall of claim 15 wherein the compound is present in an amount of about 1 to about 5 weight percent based on the weight of the composition.
22. The wall of claim 15 wherein the compound is present in an amount of about 1 to about 3 weight percent based on the weight of the composition.
23. The wall of claim 15 wherein the concentration of transition metal is 30 to 150 ppm.
24. A wall for a package comprising at least one layer, said layer comprising a composition, said composition comprising:
a) polyethylene terephthalate;
b) m-xylylene-bis-(tetrahydrophthalimide):
c) at least one transition metal in a positive oxidation state, said metal being present in the composition in an amount of from about 10 to about 400 ppm,
wherein the m-xylylene-bis-(tetrahydrophthalimide) is present in an amount of from about 0.10 to about 10 weight percent of the composition.
25. The wall of claim 24 , wherein said at least one transition metal is cobalt.
26. The wall of claim 25 wherein the concentration of transition metal is 30 to 150 ppm.