Abstract:
The present invention provides an oxygen scavenging composition for incorporation into a wall of a package. The composition comprises a polyester base polymer, at least one oligomeric, oxidizable poly(alkylene ether) glycol-a,α, ω-diester having the formula (1) and at least one transition metal in a positive oxidation state. The compositions of the present invention do not exhibit an induction period prior to the onset of oxygen scavenging upon formation into a container.
Abstract:
The present invention provides a composition comprising: a polyester base polymer; an oxidizable polyether-based additive; a transition metal catalyst; a colorant; and a polyunsaturated fatty ester additives, wherein the polyester base polymer is substantially free of antimony and substantially free of phosphorous. Containers made from the composition are colored and exhibit excellent oxygen scavenging properties with no induction period.
Abstract:
A method of making a polymer composition comprising dispersed nanoparticles of an oxygen scavenging catalyst includes polymerizing one or more monomers or pre-polymers in the presence of a platinum group metal catalyst or precursor to obtain a polymer composition having dispersed nanoparticles of the platinum group metal. The oxygen scavenging catalyst is added during the polymerization as a solution of the platinum group metal or a compound thereof and a polyhydric alcohol (e.g., glycols). The food or beverage containers made from such polymer compositions exhibit high clarity and high oxygen scavenging properties.
Abstract:
A composition comprising: a polyester base polymer; a blend of two distinct polyether-based oxygen scavenging additives, OS1 and OS2, wherein each of OS1 and OS2 is selected from the group consisting of a polyether diol, an ester end-capped derivative of a polyether diol, a polyether-polyester block copolymer, and an ether end-capped derivative of a polyetherdiol, wherein OS1 has a molecular weight of from 10,000 to 100,000 and OS2 has a molecular weight of from 200 to 5,000; and a transition metal catalyst.
Abstract:
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.
Abstract:
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.
Abstract:
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.
Abstract:
The present invention provides a composition comprising: a polyester base polymer; an oxidizable polyether-based additive; and a transition metal catalyst, wherein the polyester base polymer is substantially free of antimony. Containers made include a wall made of the composition. The polyester base polymer may preferably include polyethylene terephthalate and include less than about 100 ppm of antimony, less than about 50 ppm, less than about 10 ppm, or between about 0 and about 2 ppm. Containers made from the composition are substantially clear and exhibit excellent oxygen scavenging properties with little to no induction period.
Abstract:
The present invention provides a composition comprising: a polyester base polymer; at least one non-polymeric oxidizable organic compound; 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 polyester base polymer comprises less than about 40 ppm phosphorous. The compositions of the present invention do not exhibit an induction period prior to the onset of oxygen scavenging upon formation into a container.
Abstract:
The present invention provides a composition comprising: a polyester base polymer; at least one non-polymeric oxidizable organic compound; 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; and at least one activator compound selected from the group consisting of: (i) a polyester ionomer containing a sulfoisophthalate moiety, (ii) a polyol derivative and (iii) a N-hydroxyimide, wherein the at least one non-polymeric oxidizable organic compound is present in an amount of from about 0.10 to about 10 weight percent of the composition, and wherein the at least one activator compound is present in an amount of from about 0.01 to about 5 weight percent of the composition. The compositions of the present invention do not exhibit an induction period prior to the onset of oxygen scavenging upon formation into a container.