DURABLE OXYGEN SCAVENGING PLASTIC CONTAINERS
The present invention provides a wall for a package comprising at least one layer, the layer comprising a composition, the composition comprising: a polyester base polymer; at least one polyether polyol at a concentration of from 0.3 to 0.7 wt. %; and at least one transition metal in a positive oxidation state, the metal being present in the composition in an amount of from 10 to 400 ppm.
1 . A wall for a package comprising at least one layer, the layer comprising a composition, the composition comprising:
a) a polyester base polymer;
b) at least one polyether polyol;
c) at least one chain extending agent; and
d) at least one transition metal in a positive oxidation state.
2 . The wall of claim 1 , wherein the polyester base polymer is polyethylene terephthalate.
3 . The wall of claim 1 , wherein the polyether polyol has a concentration of from 0.3 to 0.7 wt. %.
4 . The wall of claim 1 wherein the polyether polyol has the formula
[HO—(R 1 O) n —] m X
wherein R is a substituted or unsubstituted bivalent alkylene group having 2 to 10 carbon atoms; X is H or a monovalent, bivalent, trivalent or tetravalent linking group having 1-10 carbon atoms; n=2 to 100; and m=1, 2, 3 or 4.
5 . The wall of claim 4 , wherein the polyether polyol is a polytetramethyene ether glycol.
6 . The wall of claim 5 , wherein the polytetramethyene ether glycol has a molecular weight of 250 to 4000.
7 . The wall of claim 1 , wherein the at least one transition metal is cobalt.
8 . The wall of claim 1 , further comprising at least one counter ion to the at least one transition metal.
9 . The wall of claim 1 , wherein the at least one transition metal has a concentration of from 10 to 400 ppm
10 . The wall of claim 1 , wherein the at least one chain extending agent includes a bisanhydride or a bisepoxide.
11 . The wall of claim 10 , wherein the at least one chain extending agent includes a bisanhydride having the formula
wherein Ar is
X is —O—, —C—, —CH 2 —, —C(CH 3 ) 2 —, or Z, wherein Z is
and Y is —O—, —CH 2 —, —CO—, or —C(CH 3 ) 2 —.
12 . The wall of claim 11 , wherein the bisanhydride is selected from the group consisting of pyromellitic dianhydride, benzophenonetetracarboxylic acid dianhydride, diphenyl sulfone tetracarboxylic dianhydride, bis(3,4-dicarboxyphenyl)ether dianhydride, bis(3,4-dicarboxyphenyl)thioether dianhydride, bisphenol-A bisether dianhydride, 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride, 2,3,6,7-napthalenetetracarboxylic acid dianhydride, bis(3,4-dicarboxyphenyl)sulfone dianhydride, 1,2,5,6-napthalenetetracarboxylic acid dianhydride, 2,2′,3,3′-biphenyltetracarboxylic acid, hydroquinone bisether dianhydride, 3,4,9,10-perylene tetracarboxylic acid dianhydride, 2,2-bis(3,4-dicarboxyphenyl)propane dianhydride, 3,3′,4,4′-biphenyltetracarboxylic acid dianhydride, and 4,4′-oxydiphthalic dianhydride.
13 . The wall of claim 10 , wherein the at least one chain extending agent includes a bisepoxide having the formula
wherein X′ is a bifunctional organic linking group selected from the group consisting of —O—Ar′—O—, —N(Y′)—, —N(Z′)N—, Ar′ is an aromatic group, Y′ is an amide, and Z′ is an imide linking group.
14 . The wall of claim 13 , wherein the bisepoxide is selected from the group consisting of bisphenol-A-diglycidylether, bis(3,4-epoxycyclohexylmethyl) adipate, N,N-diglycidyl benzamide (and related species) N,N-diglycidyl nailine and related structures, N,N diglycidylhydantoin, barbituric acid, isocyanuric acid or uracil species, N,N-diglycidyl di-imides, N,N-diglycidyl imidazolones, and epoxy novolaks.
15 . The wall of claim 1 , wherein the package is a monolayer container.
16 . The wall of claim 1 , wherein the package is a multilayer container.
17 . A wall for a package comprising at least one layer, the layer comprising a composition, the composition comprising:
a) a polyester base polymer;
b) at least one polyether polyol;
c) at least one chain extending agent including a bisanhydride; and
d) at least one transition metal in a positive oxidation state.
18 . The wall of claim 17 , wherein the bisanhydride has the formula
wherein Ar is
X is —O—, —CO—, —CH 2 —, —C(CH 3 ) 2 —, or Z, wherein Z is
and Y is —O—, —CH 2 —, —CO—, or —C(CH 3 ) 2 —.
19 . The wall of claim 18 , wherein the bisanhydride is selected from the group consisting of pyromellitic dianhydride, benzophenonetetracarboxylic acid dianhydride, diphenyl sulfone tetracarboxylic dianhydride, bis(3,4-dicarboxyphenyl)ether dianhydride, bis(3,4-dicarboxyphenyl)thioether dianhydride, bisphenol-A bisether dianhydride, 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride, 2,3,6,7-napthalenetetracarboxylic acid dianhydride, bis(3,4-dicarboxyphenyl)sulfone dianhydride, 1,2,5,6-napthalenetetracarboxylic acid dianhydride, 2,2′,3,3′-biphenyltetracarboxylic acid, hydroquinone bisether dianhydride, 3,4,9,10-perylene tetracarboxylic acid dianhydride, 2,2-bis(3,4-dicarboxyphenyl)propane dianhydride, 3,3′,4,4′-biphenyltetracarboxylic acid dianhydride, and 4,4′-oxydiphthalic dianhydride.
20 . The wall of claim 17 wherein the polyether polyol has the formula
[HO—(R 1 O) n —] m X
wherein R is a substituted or unsubstituted bivalent alkylene group having 2 to 10 carbon atoms; X is H or a monovalent, bivalent, trivalent or tetravalent linking group having 1-10 carbon atoms; n=2 to 100; and m=1, 2, 3 or 4.
21 . The wall of claim 20 , wherein the polyether polyol is a polytetramethyene ether glycol.
22 . The wall of claim 21 , wherein the the polytetramethyene ether glycol has a molecular weight of 250 to 4000.
23 . The wall of claim 17 , wherein the polyether polyol has a concentration of from 0.3 to 0.7 wt. %.
24 . The wall of claim 17 , wherein the at least one transition metal is cobalt.
25 . The wall of claim 17 , wherein the at least one transition metal has a concentration of from 10 to 400 ppm.
26 . The wall of claim 17 , further comprising at least one counter ion to the at least one transition metal.
27 . The wall of claim 17 , wherein the package is a monolayer container.
28 . The wall of claim 17 , wherein the package is a multilayer container.
29 . A wall for a package comprising at least one layer, the layer comprising a composition, the composition comprising:
a) a polyester base polymer;
b) at least one polyether polyol having a concentration of from 0.3 to 0.7 wt. %;
c) at least one chain extending agent; and
d) at least one transition metal in a positive oxidation state having a concentration of from 10 to 400 ppm.
30 . The wall of claim 29 , wherein the at least one chain extending agent includes a bisanhydride or a bisepoxide.