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US 11,077,424 B2Granted
Oxygen scavenger composition
AssigneeMitsubishi Gas Chemical Company, Inc.
InventorsKen Sugimoto, Yoshinobu Miyabe, Shinichi Ikeda, Kouta Kagimoto, Ryoujyu Narikawa
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Abstract
The present invention provides an oxygen scavenger composition comprising a granule having: an α layer containing a water retention agent, a swelling agent, a metal salt and water; a β layer containing iron; and a γ layer containing a porous support, wherein the granule forms a layer structure in order of the α layer, the β layer and the γ layer from an inside to an outside of the granule.
Claims7
An oxygen scavenger composition comprising a granule comprising:
- an α layer comprising a water retention agent, a swelling agent, a metal salt and water;
- a β layer consisting of iron in an amount of from 80% by mass to 100% by mass of the layer, with the balance being at least one auxiliary selected from the group consisting of powders of silica, hydrophobic silica, magnesium stearate, calcium stearate, activated carbon, zeolite, pearlite, diatomaceous earth, activated clay, kaolin, talc, bentonite, activated alumina, gypsum, silica alumina, calcium silicate, magnesium oxide, graphite, carbon black, aluminum hydroxide, iron oxide;
- and
- a γ layer comprising a porous support,
- wherein the granule forms a layer structure in order of the α layer, the β layer, and the γ layer from an inside to an outside of the granule, and
- wherein the α and γ layers do not include any of the auxiliaries contained in the β layer.
3 more elements
Dependencies are inferred from the claim text.