Colored oxygen scavenging polymers
First Claim
1. ) A melt blended resin for packaging articles comprising:
- a base polymer, oxidizable organic polymer, transition metal catalyst, and a colorant, such that an article made from said melt blended resin has a CDF of less than about 0.25.
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Accused Products
Abstract
The present invention relates to a melt blend of a base polymer, an oxidizable organic polymer, a transition metal salt catalyst and a colorant that does not completely deactivate the catalyzed oxidation. A preferred colorant, yields in an article made from the polymer melt blend a Catalyst Deactivation Factor (CDF) of less than about 0.25, preferably less than 0.15, more preferably less than 0.1, and most preferred less than 0.05. The present invention also comprises a colored monolayer article having the described CDF, such as a film, thermoformed tray, or blow molded container, that has active oxygen scavenging properties. The colorant, after melt blending a base polymer, an oxidizable organic polymer, a transition metal catalyst, does not increase the binding energy of the transition metal catalyst ion by more than 1 eV.
33 Citations
20 Claims
-
1. ) A melt blended resin for packaging articles comprising:
- a base polymer, oxidizable organic polymer, transition metal catalyst, and a colorant, such that an article made from said melt blended resin has a CDF of less than about 0.25.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
13. ) A colored polyester monolayer container having an oxygen permeation rate of less than 0.01 (cc(
STP )·- cm)/(m2·
atm·
day), said container comprising a melt blend of a base polymer, oxidizable organic polymer, transition metal catalyst, and a colorant, such that said monolayer container has a CDF of less than about 0.25. - View Dependent Claims (14, 15, 16, 17)
- cm)/(m2·
-
18. ) A monolayer film, thermoformable tray, or blow molded container having an oxygen permeation rate of less than 0.01 (cc(
STP )·- cm)/(m2·
atm·
day), said film, thermoformable tray or container formed from a melt blend of a base polymer, oxidizable organic polymer, transition metal catalyst, and a colorant.
- cm)/(m2·
-
19. ) A polymer blend for packaging articles comprising:
- a melt blend of a base polymer, oxidizable organic polymer, transition metal catalyst, and a colorant, such that said blend does not increase the binding energy of the transition metal catalyst ion by more than 1 eV.
- View Dependent Claims (20)
Specification