Oxygen scavenging compositions comprising polymers derived from aromatic difunctional monomers
AssigneeChevron Phillips Chemical Company LP
InventorsHu Yang, Ta Yen Ching, Peter Kwan
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Abstract
Herein is disclosed an oxygen scavenging composition, comprising (i) an oxygen scavenging polymer comprising units having structure I: wherein R1 and R2 are independently selected from the group consisting of —O—, —NCO—, and —NR—, wherein R is selected from the group consisting of —H and —C1-C6 alkyls; (ii) a transition metal oxidation catalyst; and (iii) an energy-absorbing compound selected from the group consisting of microwave reactive materials and photoinitiators having a wavelength of maximum absorption of electromagnetic radiation from about 200 nm to about 750 nm. The oxygen scavenging composition can be used to form an oxygen scavenging packaging article.
Claims38
An oxygen scavenging composition, comprising:
- an oxygen scavenging polymer comprising units having structure I:
- wherein R1 and R2 are independently selected from the group consisting of —O—, —C(═O)O—, —NH—, —NHC(═O)—, —NHC(═O)O—, and —NR—, wherein R is selected from the group consisting of —H and —C1-C6 alkyls;
- a transition metal oxidation catalyst;
- and
- a photoinitiator having a wavelength of maximum absorption of electromagnetic radiation from about 200 nm to about 750 nm.
An oxygen scavenging packaging article, comprising:
- an oxygen scavenging polymer comprising units having structure I:
- wherein R1 and R2 are independently selected from the group consisting of —O—, —C(═O)O—, —NH—, —NHC(═O)—, —NHC(═O)O—, and —NR—, wherein R is selected from the group consisting of —H and —C1-C6 alkyls;
- a transition metal oxidation catalyst;
- and
- an energy-absorbing compound selected from the group consisting of microwave reactive materials and photoinitiators having a wavelength of maximum absorption of electromagnetic radiation from about 200 nm to about 750 nm.
A method of initiating oxygen scavenging by an oxygen scavenging composition, comprising:
- (a) providing an oxygen scavenging composition, comprising:
- (i) an oxygen scavenging polymer comprising units having structure I:
- wherein R1 and R2 are independently selected from the group consisting of —O—, —C(═O)O—, —NH—, —NHC(═O)—, —NHC(═O)O—, and —NR—, wherein R is selected from the group consisting of —H and —C1-C6 alkyls;
- (ii) a transition metal oxidation catalyst;
- and
- (iii) an energy-absorbing compound selected from the group consisting of microwave reactive materials and photoinitiators having a wavelength of maximum absorption of electromagnetic radiation from about 200 nm to about 750 nm;
- and
- (b) exposing the oxygen scavenging composition to electromagnetic radiation for a duration sufficient to initiate oxygen scavenging by the oxygen scavenging composition.
An oxygen scavenging composition, comprising:
- an oxygen scavenging polymer comprising units having structure I:
- wherein R1 and R2 are independently selected from the group consisting of —O—, —C(═O)O—, —NH—, —NHC(═O)—, —NHC(═O)O—, and —NR—, wherein R is selected from the group consisting of —H and —C1-C6 alkyls;
- a transition metal oxidation catalyst;
- and
- a microwave reactive material.
A method of producing a packaging article comprising an oxygen scavenging layer, wherein the oxygen scavenging layer comprises a polymer comprising structure I:
- wherein R1 is selected from the group consisting of —O— and —NH—, and R2 is selected from the group consisting of —O— and —NH—, the method comprising:
- (i) providing a composition comprising the polymer comprising structure I, and
- (ii) forming the composition into a packaging article or an oxygen scavenging layer thereof.
Dependencies are inferred from the claim text.