Coating processes – Particles – flakes – or granules coated or encapsulated
Reexamination Certificate
2011-05-31
2011-05-31
Kiliman, Leszek (Department: 1788)
Coating processes
Particles, flakes, or granules coated or encapsulated
C427S216000, C428S403000
Reexamination Certificate
active
07951419
ABSTRACT:
Heterogeneous oxygen-scavenging particles are formed by dry coating activating component particles onto oxidizable component particles, largely through a succession of mechanical motions. The component particles are repeatedly mixed, compressed, and sheared. Smaller activating component particles coat the surface of larger oxidizing component particles by force-induced contact, while irregularities are removed by abrasion among the particles. The oxygen-scavenging particles can be blended together with a base polymer into a masterbatch having a higher concentration than required for use as an active barrier to oxygen permeation. The masterbatch can be diluted with the same or a compatible polymer to form the active barrier.
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