Dry-coated oxygen-scavenging particles and methods of making them
AssigneeMultisorb Technologies, Inc.
InventorStanislav E. Solovyov
Life of this patent
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Abstract
A method of dry coating oxidizable particles with activating particles. The method includes accreting at least portions of the activating particles onto surfaces of the oxidizable particles by mechanically induced juxtapositions to form composite particles; and abrading the composite particles to more evenly distribute the activating component over surfaces of the activating particles.
Claims66
A method of dry coating oxidizable particles with activating particles, comprising steps of:
- (a) accreting at least portions of the activating particles onto surfaces of the oxidizable particles by mechanical force to form composite particles;
- and
- (b) abrading the composite particles to more evenly distribute the activating component over surfaces of the activating particles.
A batch of composite oxygen-scavenging particles that react with oxygen in the presence of liquid phase water or water vapor, comprising:
- (a) oxidizable component particles being dry coated with activating component particles by mechanical force forming composite particles;
- and
- (b) the composite particles being mechanically abraded while continuing to be dry coated by mechanical forces for reducing irregularities within the activating component coating.
An oxygen-scavenging masterbatch, comprising:
- (a) composite oxygen-scavenging particles including oxidizable component particles dry coated with an activating component;
- (b) a base polymer forming a matrix for embedding the oxygen-scavenging particles;
- (c) the composite oxygen-scavenging particles being embedded within the matrix of the base polymer, together forming a plurality of solid concentrates;
- and
- (d) the composite oxygen-scavenging particles occupying at least five percent by weight of solid concentrates;
- and wherein oxidizable component particles are dry coated with the activating component in a particle form.
A method of forming an oxygen-scavenging masterbatch, comprising steps of:
- (a) dry coating oxidizable component particles with an activating component to form a batch of composite oxygen-scavenging particles;
- (b) embedding the batch of oxygen-scavenging particles within a matrix of a base polymer at a concentration above its intended use;
- and
- (c) transforming the base polymer embedded with the oxygen-scavenging particles into a plurality of solid concentrates.
A method of forming an active barrier to oxygen permeation, comprising steps of:
- (a) embedding a batch of composite oxygen-scavenging particles within a matrix of a base polymer at a first concentration;
- (b) transforming the base polymer embedded with the composite oxygen-scavenging particles into a plurality of solid concentrates;
- (c) mixing the solid concentrates together with other solid concentrates of a polymer;
- and
- (d) transforming the mixture of solid concentrates into a barrier layer in which the composite oxygen-scavenging particles are embedded within the barrier layer in a second lower concentration.
Dependencies are inferred from the claim text.