| 摘要 |
The invention provides an oxygen scavenger composition consisting essentially of
[I] as essential components,
(a) an alkali metal sulfide, and
(b) at least one oxidation promoter selected from silica, alumina, silica-alumina, silica-magnesia and inorganic materials containing one of them as a main ingredient; and
[II] as optional components,
(c) at least one oxidation promoter aid, and/or
(d) a water-insoluble or sparingly water-soluble, inert filler, and/or
(e) water held physically or chemically in the composition.
<??>Also provided are a heat-generating composition which is an oxygen scavenger capable of scavenging at least 5 ml of oxygen per gram of the composition from air at 20 DEG C during one hour following the commencement of oxidation of the composition and a heat-generating structure comprising the heat-generating composition enclosed within a film having an oxygen permeability of 0.01 to 50 cc/cm<2>. min. .02 partial pressure (1 atm.), the surface area of the film being 0.2 to 10 cm<2> per gram of said composition.
<??>The oxygen scavenger compositions can be used to capture oxygen from within a closed vessel, while the heat-generating compositions can be used to provide a required amount of heat to an object to be heated. |
