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US 9,447,321 B2Granted
Oxygen scavenging compositions for plastic containers
AssigneeGraham Packaging Company, L.P.
InventorsMurali K. Akkapeddi, Brian A. Lynch
Life of this patent
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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-α,ω-diester having the formula 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.
Claims33
A composition comprising:
- a) a polyester base polymer;
- b) at least one oligomeric, oxidizable poly(alkylene ether) glycol-α,ω-diester having the formula
- wherein,
- R is a substituted or unsubstituted alkylene chain having from 2 to 10 carbon atoms;
- R′ and R″ are each independently an alkyl sulfonic acid group or a metal salt thereof, an aryl sulfonic acid group or a metal salt thereof, an alkyl group having from 1 to 18 carbon atoms, or an aromatic group having from 6 to 18 carbon atoms;
- and
- n is from 4 to 100;
- and
- c) 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 at least one oligomeric, oxidizable poly(alkylene ether) glycol-α,ω-diester is present in an amount of from about 0.10 to about 10 weight percent of the composition, wherein at least one of R′ and R″ is either (1) an alkyl sulfonic acid group or a metal salt thereof or (2) an aryl sulfonic acid group or a metal salt thereof.
6 more elements
A wall for a package comprising at least one layer, said layer comprising a composition, said composition comprising:
- a) a polyester base polymer;
- b) at least one oligomeric, oxidizable poly(alkylene ether) glycol-α,ω-diester having the formula
- wherein,
- R is a substituted or unsubstituted alkylene chain having from 2 to 10 carbon atoms;
- R′ and R″ are each independently an alkyl sulfonic acid group or a metal salt thereof, an aryl sulfonic acid group or a metal salt thereof, an alkyl group having from 1 to 18 carbon atoms, or an aromatic group having from 6 to 18 carbon atoms;
- and
- n is from 4 to 100;
- and
- c) 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 at least one of R′ and R″ is either (1) an alkyl sulfonic acid group or a metal salt thereof or (2) an aryl sulfonic acid group or a metal salt thereof.
6 more elements
A composition comprising:
- an oligomeric, oxidizable poly(alkylene ether) glycol-α,ω-diester having the formula:
- wherein
- Ra is a substituted or unsubstituted alkylene chain having from 3 to 10 carbon atoms;
- R′a and R″a are each independently an alkyl sulfonic acid group or a metal salt thereof an aryl sulfonic acid group or a metal salt thereof, an alkyl group having from 1 to 18 carbon atoms, or an aromatic group having from 6 to 18 carbon atoms;
- and
- m is from 4 to 100,
- wherein at least one of R′a and R″a is either 1 an alkyl sulfonic acid group or a metal salt thereof or (2) an aryl sulfonic acid group or a metal salt thereof;
- at least one oligomeric, oxidizable poly(alkylene ether) glycol-α,ω-diester having the formula
- wherein,
- R is a substituted or unsubstituted alkylene chain having from 3 to 10 carbon atoms;
- R′ and R″ are each independently an alkyl group having from 1 to 18 carbon atoms, or an aromatic group having from 6 to 18 carbon atoms;
- and
- n is from 4 to 100, 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 the at least one oligomeric, oxidizable poly(alkylene ether) glycol-α,ω-diester is present in an amount of from about 0.10 to about 10 weight percent of the composition.
11 more elements
A composition comprising:
- a) an oligomeric, oxidizable poly(alkylene ether) glycol-α,ω-diester having the formula
- wherein,
- R is a substituted or unsubstituted alkylene chain having from 3 to 10 carbon atoms;
- R′ and R″ are each independently an alkyl sulfonic acid group or a metal salt thereof, an aryl sulfonic group or a metal salt thereof, an alkyl group having from 1 to 18 carbon atoms, or an aromatic group having from 6 to 18 carbon atoms;
- and
- n is from 4 to 100,
- wherein at least one of R′ and R″ is either (1) an alkyl sulfonic acid group or a metal salt thereof or (2) an aryl sulfonic acid group or a metal salt thereof;
- b) at least one oligomeric, poly(alkylene ether) having the formula
- HO—[R—O]n—H,
- wherein,
- R is a substituted or unsubstituted alkylene chain having from 2 to 10 carbon atoms;
- and
- n is from 4 to 100;
- and
- c) 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 at least one oligomeric, oxidizable poly(alkylene ether) is present in an amount of from about 0.10 to about 10 weight percent of the composition.
13 more elements
Dependencies are inferred from the claim text.