Oxygen scavengers, compositions comprising the scavengers, and articles made from the compositions
The present disclosure relates to oxygen scavenging molecules, compositions comprising the molecules, and articles made from the compositions.
1. A melt-blended polymer composition comprising:
a) a thermoplastic polymer;
b) a transition metal in a positive oxidation state, the metal present in an amount of from about 10 ppm to about 400 ppm; and
c) a compound having the formula:
wherein R 1 is chosen from:
i) —CH 3 ;
ii) —CHO; or
iii) a combination thereof; and
the index n is equal to 1 or 2.
2. The polymer composition according to claim 1 , comprising from about 30 ppm to about 150 ppm of a transition metal.
3. The polymer composition according to claim 1 , wherein the thermoplastic polymer is a polyester homopolymer or polyester copolymer.
4. The polymer composition according to claim 1 , wherein the thermoplastic polymer comprises polyethylene terephthalate or a copolymer thereof.
5. The polymer composition according to claim 1 , wherein the compound comprises from about 1% to about 10% by weight of the composition.
6. The polymer composition according to claim 1 , wherein the compound comprises from about 1% to about 5% by weight of the composition.
7. The polymer composition according to claim 1 , wherein the compound comprises from about 1% to about 3% by weight of the composition.
8. The polymer composition according to claim 1 , further comprising a colorant.