Oxygen Scavenging Compositions, Articles Containing Same, and Methods of Their Use
The disclosure relates to transition metal compositions, methods of making the compositions, articles prepared from the compositions, and methods of making the articles. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
1 . A transition metal master batch composition comprising:
(a) a polymer carrier; and
(b) a transition metal composition dispersed in the solid polymer carrier;
wherein the transition metal in the transition metal composition is present in an amount greater than about 30,000 ppm (by metal) based on the weight of the transition metal master batch composition.
2 . The composition of claim 1 , wherein the polymer carrier comprises a polyester polymer.
3 . The composition of claim 2 , wherein the polyester polymer is a polyalkyl terephthalate, or a copolymer thereof.
4 . The composition of claim 2 , wherein the polyester polymer is polyethylene terephthalate, or a copolymer thereof.
5 . The composition of claim 2 , wherein the polyester polymer is selected from polyethylene terephthalate, poly(dimethyl cyclohexane terephthalate), polytrimethylene terephthalate, polynaphthalate, or a copolymer thereof.
6 . The composition of claim 1 , wherein the amount of the polymer carrier present in the transition metal master batch composition is from about 75 weight percent to about 85 weight percent.
7 . The composition of claim 1 , wherein the transition metal comprises cobalt.
8 . The composition of claim 7 , wherein the source of cobalt comprises a cobalt carboxylate or cobalt neodecanoate, or mixtures thereof.
9 . The composition of claim 1 , wherein the transition metal composition is present in an amount greater than about 40,000 ppm (by metal) based on the weight of the transition metal master batch composition.
10 . A transition metal compact composition comprising:
(a) an oxygen scavenger composition; and
(b) a transition metal master batch composition dispersed in the oxygen scavenger composition;
wherein the oxygen scavenger composition is present in an amount greater than about 85 weigh percent;
wherein the transition metal master batch composition comprises:
(i) a polymer carrier; and
(ii) a transition metal composition dispersed in the solid polymer carrier;
wherein the transition metal composition is present in an amount greater than about 30,000 ppm (by metal) based on the weight of the transition metal master batch composition.
11 . The composition of claim 10 , wherein the oxygen scavenger composition comprises a compound represented by a formula:
12 . The composition of claim 10 , wherein the oxygen scavenger composition comprises a compound represented by a formula:
13 . A method of making a transition metal master batch composition comprising the step of extruding a transition metal master batch composition, the composition comprising:
(a) a polymer carrier; and
(b) a transition metal composition;
wherein the transition metal composition is present in an amount greater than about 30,000 ppm (by metal) based on the weight of the transition metal master batch composition.
14 . The method of claim 13 , further comprising the step of milling the transition metal master batch composition following the step of extrusion.
15 . The method of claim 14 , wherein the transition metal master batch composition is milled to a size less than about 1.0 mm screen size.
16 . The method of claim 13 , wherein the polymer carrier comprises a polyester polymer.
17 . The method of claim 16 , wherein the polyester polymer is polyethylene terephthalate, or a copolymer thereof.
18 . The method of claim 13 , wherein the transition metal composition is present in an amount greater than about 40,000 ppm (by metal) based on the weight of the transition metal master batch composition.
19 . A method of making transition metal compacted pellets comprising the steps of:
(1) extruding a transition metal master batch composition, the composition comprising:
(a) a solid polymer carrier; and
(b) a transition metal composition;
wherein the transition metal composition is present in an amount greater than about 30,000 ppm (by metal) based on the weight of the transition metal master batch composition;
(2) processing the extrudate comprising the transition metal master batch composition to particulate form by milling or pulverization, wherein the particle size is less than about 5.0 mm screen size;
(3) preparing a homogeneous mixture comprising the particulate transition metal master batch composition and a powdered oxygen scavenger composition, wherein the powdered oxygen scavenger composition is present in an amount greater than about 85 weigh percent based on the combined weight of the particulate transition metal master batch composition and the powdered oxygen scavenger composition; and
(4) forming compacted single pellets from the homogeneous mixture comprising the particulate transition metal master batch composition and a powdered oxygen scavenger composition, thereby producing transition metal compacted pellets.
20 . The method of claim 19 , wherein the oxygen scavenger composition comprises a compound represented by a formula:
21 . The method of claim 19 , wherein the oxygen scavenger composition comprises a compound represented by a formula: