In-situ polymerized polymer-platinum group metal nanoparticle blends and oxygen scavenging containers made therefrom
AssigneeGraham Packaging Company, L.P.
InventorMurali K. Akkapeddi
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Abstract
A method of making a polymer composition comprising dispersed nanoparticles of an oxygen scavenging catalyst includes polymerizing one or more monomers or pre-polymers in the presence of a platinum group metal catalyst or precursor to obtain a polymer composition having dispersed nanoparticles of the platinum group metal. The oxygen scavenging catalyst is added during the polymerization as a solution of the platinum group metal or a compound thereof and a polyhydric alcohol (e.g., glycols). The food or beverage containers made from such polymer compositions exhibit high clarity and high oxygen scavenging properties.
Claims20
A method of making a polymer composition comprising dispersed nanoparticles, the method comprising:
- polymerizing one or more monomers or pre-polymers in the presence of a catalyst or catalyst precursor comprising a platinum group metal to obtain a polymer composition comprising dispersed nanoparticles of the platinum group metal,
- wherein the catalyst or catalyst precursor is added before or during the polymerization as a solution comprising the platinum group metal or a compound thereof and a polyhydric alcohol.
A method of making a polyethylene terephthalate composition comprising dispersed nanoparticles of an oxygen scavenging catalyst, the method comprising:
- adding a glycol solution comprising a palladium compound before or during polymerization of polyethylene terephthalate to form a polyethylene terephthalate composition comprising dispersed nanoparticles of palladium.
Dependencies are inferred from the claim text.