Granted Patent B2

US 8,721,920 · App. 12/720,049 · Granted May 13, 2014

Abstract

Claims (32)

1. A wall of a package comprising at least one layer, the layer comprising a composition, the composition comprising:

(a) at least one base polymer comprising a polyester polymer;

(b) at least one non-polymeric oxidizable organic component present in an amount of about 0.10 to 10 weight present of the composition and the component comprising at least one compound of the formula E-(L-E) x wherein:

E is

L is a linking group of the formula —(O—R 21 ) z —O—, —(NH—R 21 ) z —NH—, —(NH—C(═O)R 22 ) t —NH, —NH—R 25 —NH(C(═O)R 26 NHR 25 NH) u —, —(O—R 23 —O—R 24 —C(═O) s —O— where L is attached to a carbon atom of Ar in structure (I);

x is 0, 1, or 2;

Ar is aryl or heteroaryl;

R 1 , R 2 , are each independently, H, C 1 -C 12 alkyl, C 1 -C 6 alkoxy, C 6 -C 20 aryloxy, hydroxy, C 2 -C 6 alkenyl, NR 19 R 20 , acetyl, nitro, glyceryl, carbohydrate, —C(═O)H, L, or two R 1 or two R 2 groups can form a group of the formula —O—R 18 —O;

R 3 , R 4 are each H;

R 5 to R 10 are each, independently, H or C 1 -C 3 alkyl;

R 18 is C 2 -C 6 alkyl;

R 19 and R 20 are each, independently, H, C 1 -C 6 alkyl, or C 6 -C 20 aryl;

R 21 and R 24 are each, independently, C 1 -C 6 alkyl;

R 22 , R 23 , R 25 and R 26 are each, independently, C 1 -C 6 alkyl or C 6 -C 20 aryl;

n and p are independently 0 or an integer from 1 to 5;

s and z are, independently 1, 2, or 3;

t and u are, independently 1 or 2; and

(c) at least one transition metal in a positive oxidation state, the metal being present in the composition in an amount of 10 to 400 ppm;

and wherein the permeability for oxygen of the composition is not more than about 3.0 cm 3 mm/(m 2 atmday).

2. The wall of a package of claim 1 , wherein the compound of the formula E-(L-E) x is

3. The wall of a package of claim 2 , where n and p are each 0, 1, or 2 and R 1 and R 2 are each independently H, C 1 -C 4 alkyl, hydroxy, C 1 -C 3 alkoxy, or carbohydrate.

4. The wall of a package of claim 3 , wherein R 1 and R 2 are each independently H, methyl, ethyl, hydroxy, methoxy, ethoxy, or glucose.

5. The wall of a package of claim 3 , where R 5 to R 10 are H.

6. The wall of a package of claim 3 , where R 1 and R 2 are each H.

7. The wall of a package of claim 1 , wherein the compound of the formula E-(L-E) x is:

8. The wall of a package of claim 1 , wherein the at least one transition metal is cobalt.

9. The wall of a package of claim 8 , wherein the at least one transition metal further comprises zinc.

10. The wall of a package of claim 1 , wherein the polyester polymer is polyethylene terephthalate.

11. The wall of a package of claim 1 , wherein the oxidizable organic component is present in an amount of about 1 to about 10 weight percent based on the weight of the composition.

12. The wall of a package of claim 1 , wherein the oxidizable organic component is present in an amount of about 1 to about 5 weight percent based on the weight of the composition.

13. The wall of a package of claim 1 , wherein the oxidizable organic component is present in an amount of about 1 to about 3 weight percent based on the weight of the composition.

14. The wall of a package of claim 1 , wherein the concentration of transition metal is 30 to 150 ppm.

Assignments (10)