Oxygen scavenging polymer compositions containing ethylene vinyl alchohol copolymers
AssigneeHoneywell International Inc.
InventorsMingliang L. Tsai, Murali K. Akkapeddi
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Abstract
Oxygen barrier polymer compositions exhibiting high oxygen scavenging capability suitable for extended shelf-life, packaging applications. These polymer compositions comprise at least one ethylene vinyl alcohol copolymer, at least one oxidizable polydiene, and at least one metal salt catalyst. The polymer products are particularly suited to making barrier packaging articles such as monolayer or multi-layer films, sheets, tubes, pipes, thermoformed containers and coinjection/coextrusion blow molded bottles comprising PET, polyolefin or polycarbonate as structural layers. Such articles are useful in a variety of oxygen-sensitive food, beverage, pharmaceutical and health care product packaging applications.
Claims40
An oxygen-scavenging polymer composition which comprises:
- a) at least one ethylene vinyl alcohol copolymer;
- b) at least one oxidizable polydiene;
- and
- c) at least one metal salt catalyst.
An oxygen barrier film comprising a layer of a polymer composition which comprises:
- a) at least one ethylene vinyl alcohol copolymer;
- b) at least one oxidizable polydiene;
- and
- c) at least one metal salt catalyst.
A multilayer article which comprises:
- a) a polymer composition layer comprising at least one ethylene vinyl alcohol copolymer;
- at least one oxidizable polydiene;
- and at least one metal salt catalyst;
- and
- b) a thermoplastic polymer layer on one or both sides of the polymer composition layer.
A shaped article which comprises a polymer composition comprising:
- a) at least one ethylene vinyl alcohol copolymer;
- b) at least one oxidizable polydiene;
- and
- c) at least one metal salt catalyst.
A process for producing a polymer composition which comprises:
- a) melting at least one ethylene vinyl alcohol copolymer;
- b) blending the molten copolymer with at least one oxidizable polydiene and at least one metal salt catalyst to thereby form a mixture;
- and
- c) cooling the mixture.
A process for producing an oxygen barrier film which comprises:
- a) melting at least one ethylene vinyl alcohol copolymer;
- b) blending the molten copolymer with at least one oxidizable polydiene and at least one metal salt catalyst to thereby form a mixture;
- c) extruding, casting or blowing the mixture into a film;
- and
- d) cooling the film.
A process for producing an oxygen barrier polymer film which comprises:
- a) melting a composition which comprises at least one ethylene vinyl alcohol copolymer;
- at least one oxidizable polydiene;
- and at least one metal salt catalyst;
- b) extruding, casting or blowing the composition into a film;
- and
- c) cooling the film.
A process for producing a multilayer article which comprises:
- a) melting at least one ethylene vinyl alcohol copolymer;
- at least one oxidizable polydiene;
- and at least one metal salt catalyst to thereby form a mixture;
- b) separately melting a thermoplastic polymer composition;
- c) coextruding, casting, blowing, thermoforming, blow molding or coinjecting the mixture and thermoplastic polymer composition into a multilayer article;
- and
- d) cooling the article.
A process for producing a multilayer article which comprises:
- a) melting at least one ethylene vinyl alcohol copolymer;
- at least one oxidizable polydiene;
- and at least one metal salt catalyst to thereby form a mixture;
- b) separately melting a thermoplastic polymer composition;
- c) coinjecting molding the mixture and thermoplastic polymer composition into a multilayer preform;
- d) reheating the perform;
- and
- e) blow molding the perform into a multilayer article.
Dependencies are inferred from the claim text.