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US 10,208,200 B2Granted
Dual oxygen-scavenging compositions requiring no induction period
AssigneeGraham Packaging Company, L.P.
InventorsMurali K. Akkapeddi, Brian A. Lynch
Life of this patent
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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.
Claims35
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 polyether diol, wherein OS1 has a number average molecular weight (MN) from 10,000 to 100,000 and OS2 has a number average molecular weight (MN) from 200 to 5,000;
- and
- a transition metal catalyst.
1 more element
A composition comprising:
- PET;
- a blend of polyether-based oxygen scavenging additives comprising PTMEG-b-PET copolymer having a number average molecular weight (MN) from 20,000 to 50,000 and PTMEG having a number average molecular weight (MN) from 650 to 2,000;
- and
- a transition metal catalyst comprising cobalt.
1 more element
A wall for a package 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 polyether diol, wherein OS1 has a number average molecular weight (MN) from 10,000 to 100,000 and OS2 has a number average molecular weight (MN) from 200 to 5,000;
- and
- a transition metal catalyst.
1 more element
Dependencies are inferred from the claim text.