Oxygen scavenging dendrimers
AssigneePolyOne Corporation
InventorsLing Hu, Roger W. Avakian
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Abstract
A method and system for oxygen molecule scavenging is disclosed. The system employs as an amphiphilic dendritic polymer as the reducing agent for oxygen molecules in a thermoplastic compound. Clarity of the compound, nearly the same as thermoplastic matrix itself in the compound, is achieved by the addition of an epoxy-functional styrene-acrylate oligomer. Food and beverage containers now made of polyethylene terephthalate can be molded from the compound and have substantially the same haze as the polyethylene terephthalate itself but with the oxygen scavenger to maintain freshness of the food or beverage from oxidation.
Claims16
A method for scavenging for oxygen within a thermoplastic article, comprising:
- (a) mixing a reducing agent for oxygen molecules and an epoxy-functional styrene-acrylate oligomer into a thermoplastic polymer matrix to form a thermoplastic compound and (b) forming an article from the thermoplastic compound,
- wherein the reducing agent is amphiphilic dendritic polymer having carbon-carbon double bonds susceptible to reaction with oxygen molecules, and wherein the thermoplastic compound has substantially the same percentage haze value as the thermoplastic matrix.
A thermoplastic compound, comprising:
- (a) a thermoplastic polymer matrix;
- (b) an amphiphilic dendritic polymer having carbon-carbon double bonds susceptible to reaction with oxygen molecules;
- and (c) epoxy-functional styrene-acrylate oligomer.
Dependencies are inferred from the claim text.