OPAQUE OXYGEN SCAVENGING CONTAINERS
A wall for a package comprising a composition wherein the composition comprises: a polyester base polymer; a polyolefin polymer; a functionalized polyolefin polymer selected from the group consisting of a maleic anhdride-grafted polypropylene, a maleic anhydride-grafted polypropylene adhesive resin, an acrylic acid-grafted polyproylene, a maleic anhydride-grafted styrene-ethylene-butylene-styrene copolymer, an ethylene-butyl acrylate-maleic anhydride terpolymer, an ethylene-butyl acrylate-glycidyl methacrylate terpolymer, an oxidized polyethylene wax, and mixtures thereof; an oxidizable polyether-based additive; and a transition metal catalyst.
1 . A wall for a container comprising a composition wherein the composition comprises:
a polyester base polymer;
a polyolefin polymer;
a functionalized polyolefin polymer selected from the group consisting of a maleic anhdride-grafted polypropylene, a maleic anhydride-grafted polypropylene adhesive resin, an acrylic acid-grafted polyproylene, a maleic anhydride-grafted styrene-ethylene-butylene-styrene copolymer, an ethylene-butyl acrylate-maleic anhydride terpolymer, an ethylene-butyl acrylate-glycidyl methacrylate terpolymer, an oxidized polyethylene wax, and mixtures thereof;
an oxidizable polyether-based additive; and
a transition metal catalyst.
2 . The wall of claim 1 further comprising a colorant.
3 . The wall of claim 2 wherein the colorant comprises TiO 2 .
4 . The wall of claim 1 , wherein the polyester base polymer is polyethylene terephthalate.
5 . The wall of claim 1 , wherein the oxidizable polyether-based additive has the formula X—[R—O] n —R′—Y, wherein
R is a substituted or unsubstituted alkylene chain having from 2 to 10 carbon atoms;
n ranges from 4 to 100;
X and Y are selected from the group consisting of H, OH, —OCOR 1 , —OCOAr 1 , —OR 1 , and —OAr 1 , wherein R 1 is an alkyl group having from 2 to 18 carbon atoms and Ar 1 is an aryl group; and
R′ may be the same as R or selected from the group consisting of — [COR 2 COOR 3 O] p — and — [COAr 2 COOR 3 O] p — wherein Ar 2 is a phenylene or naphthylene group, R 2 and R 3 are C 2 to C 18 alkylene groups, and p ranges from 10 to 100.
6 . The wall of claim 1 , wherein the oxidizable polyether-based additive is selected from the group consisting of polyether diols, ester capped derivatives of polyether diols, polyether-polyester block copolymers, and ether end-capped ether end-capped derivatives of polyether diols.
7 . The wall of claim 6 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol.
8 . The wall of claim 6 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol dibenzoate or polytetramethylene ether glycol dioctaoate.
9 . The wall of claim 6 , wherein the oxidizable polyether-based additive comprises PTMEG-b-PET copolymer.
10 . The wall of claim 6 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol dimethyl ether.
11 . The wall of claim 1 , wherein the transition metal catalyst comprises cobalt.
12 . The wall of claim 11 wherein the cobalt is present in the polyester base polymer.
13 . The wall of claim 1 , wherein the transition metal catalyst comprises a carboxylate salt.
14 . The wall of claim 1 , wherein the transition metal catalyst comprises cobalt neodecanoate.
15 . The wall of claim 1 , wherein the polyester base polymer contains less than 10 ppm of antimony.
16 . The wall of claim 15 , wherein the polyester base polymer contains less than 40 ppm of phosphorous.
17 . The wall of claim 1 wherein the wall exhibits a light transmittance of less than about 1.0% at a wavelength of from about 400 nm to about 700 nm.
18 . A wall for a container comprising a composition wherein the composition comprises:
a polyester base polymer;
from about 5 wt. % to about 15 wt. % of a polyolefin polymer;
from about 0.1 wt. % to about 1.5 wt. % of a functionalized polyolefin polymer selected from the group consisting of a maleic anhdride-grafted polypropylene, a maleic anhydride-grafted polypropylene adhesive resin, an acrylic acid-grafted polyproylene, a maleic anhydride-grafted styrene-ethylene-butylene-styrene copolymer, an ethylene-butyl acrylate-maleic anhydride terpolymer, an ethylene-butyl acrylate-glycidyl methacrylate terpolymer, an oxidized polyethylene wax, and mixtures thereof;
from about 0.5 wt. % to about 5 wt. % of an oxidizable polyether-based additive;
a transition metal catalyst; and
from about 1 wt. % to about 3 wt. % of a colorant.
19 . The wall of claim 18 wherein the colorant comprises TiO 2 .
20 . The wall of claim 18 , wherein the polyester base polymer is polyethylene terephthalate.
21 . The wall of claim 18 , wherein the oxidizable polyether-based additive has the formula X—[R—O] n —R′—Y, wherein
R is a substituted or unsubstituted alkylene chain having from 2 to 10 carbon atoms;
n ranges from 4 to 100;
X and Y are selected from the group consisting of H, OH, —OCOR 1 , —OCOAr 1 , —OR 1 , and —OAr 1 , wherein R 1 is an alkyl group having from 2 to 18 carbon atoms and Ar 1 is an aryl group; and
R′ may be the same as R or selected from the group consisting of — [COR 2 COOR 3 O] p — and — [COAr 2 COOR 3 O] p — wherein Ar 2 is a phenylene or naphthylene group, R 2 and R 3 are C 2 to C 18 alkylene groups, and p ranges from 10 to 100.
22 . The wall of claim 18 , wherein the oxidizable polyether-based additive is selected from the group consisting of polyether diols, ester capped derivatives of polyether diols, polyether-polyester block copolymers, and ether end-capped ether end-capped derivatives of polyether diols.
23 . The wall of claim 22 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol.
24 . The wall of claim 22 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol dibenzoate or polytetramethylene ether glycol dioctaoate.
25 . The wall of claim 22 , wherein the oxidizable polyether-based additive comprises PTMEG-b-PET copolymer.
26 . The wall of claim 22 , wherein the oxidizable polyether-based additive comprises polytetramethylene ether glycol dimethyl ether.
27 . The wall of claim 18 , wherein the transition metal catalyst comprises cobalt.
28 . The wall of claim 27 wherein the cobalt is present in the polyester base polymer.
29 . The wall of claim 18 , wherein the transition metal catalyst comprises a carboxylate salt.
30 . The wall of claim 18 , wherein the transition metal catalyst comprises cobalt neodecanoate.
31 . The wall of claim 18 , wherein the polyester base polymer contains less than 10 ppm of antimony.
32 . The wall of claim 31 , wherein the polyester base polymer contains less than 40 ppm of phosphorous.
33 . The wall of claim 18 wherein the wall exhibits a light transmittance of less than about 1.0% at a wavelength of from about 400 nm to about 700 nm.