US 2008/0185556 A1 · Oxygen generating composition

Abstract

Provided is an oxygen generating composition comprising a metal powder fuel, a transition metal oxide catalyst, a reaction moderator, a binder, an additive, and an oxygen source. The additives are feldspar or anhydrous aluminum silicate, or both. The oxygen generating composition can be used to generate oxygen on thermal decomposition. The oxygen generating composition is suitable for incorporation into oxygen generating candles. Oxygen generating candles of the present invention have the advantages of lower chlorine concentration, better reaction rate control, and lesser sensitivity to temperature effects on oxygen generation when compared with conventional oxygen generating candles. Additionally, oxygen generating candles comprising the compositions of the present invention can result in candles that do not contain barium compounds, and are non-hazardous, stable to moisture, CO2, and to air, and are suitable for either wet or dry processing methods.

Claims30

Dependent claims

1) An oxygen generating composition suitable for producing breathable oxygen gas upon thermal decomposition of the composition, the composition comprising:

a metal powder fuel;
a transition metal oxide catalyst;
an oxygen source;
and
an additive, wherein the additive is selected from the group consisting of feldspar, anhydrous aluminum silicate, and combinations thereof.

2 more elements

11) An oxygen generating candle for producing breathable oxygen gas upon thermal decomposition of the candle, said candle comprising:

a plurality of layers of oxygen generating compositions, wherein at least one of the layers comprises:
a metal powder fuel;
a transition metal oxide catalyst;
an oxygen source;
and
an additive, wherein the additive is selected from the group consisting of feldspar, anhydrous aluminum silicate, and combinations thereof,
the oxygen generating candle being operable for producing breathable oxygen for a period of at least several minutes.

4 more elements

21) An improvement in an oxygen generating composition for producing breathable oxygen gas for at least several minutes upon thermal decomposition of the composition, the composition comprising:

a metal powder fuel;
a transition metal oxide catalyst;
an oxygen source;
wherein the improvement comprises:
an additive selected from the group consisting of feldspar, anhydrous aluminum silicate, and combinations thereof, wherein the additive is wet processible, and wherein the feldspar is incorporated into the composition for suppression of residual chlorine, and wherein the anhydrous aluminum silicate is incorporated into the composition to increase the available oxygen content of a candle comprising the oxygen generating composition or to decrease the size of a candle comprising the oxygen generating composition.

2 more elements

Dependencies are inferred from the claim text.

Oxygen generating composition

Life of this patent

Oxygen generating composition

Life of this patent

Abstract

Claims30