Low temperature sensitivity oxygen generating compositions

• US 6,231,816 B1
• Filed: 03/14/2000
• Issued: 05/15/2001
• Est. Priority Date: 01/30/1998
• Status: Expired due to Term

• Current Assignee: B/E Intellectual Property, Inc.
• Original Assignee: B/E Intellectual Property, Inc.
• Inventors: Cannon, James C., Zhang, Yunchang
• Primary Examiner(s): ANTHONY, JOSEPH DAVID
• Application Number:
  US09/524,292
• Time in Patent Office: 427 Days
• Field of Search: 252/187.31, 252/187.1, 422/126, 149/77, 149/113
• US Class Current: 422/126
• CPC Class Codes: C01B 13/0211 Peroxy compounds
• CPC Class Codes: C01B 13/0218 Chlorate
• CPC Class Codes: C01B 13/0296 Generators releasing in a self-sustaining way pure oxygen from a solid charge, without interaction of it with a fluid nor external heating, e.g. chlorate candles or canisters containing them charges per se C01B13/02
• CPC Class Codes: Y10S 149/113 Inorganic oxygen-halogen salt

Abstract

The oxygen generation compositions include about 0.5-15% by weight of a substantially carbon-free metal fuel, and about 0.1-20% by weight of alkali metal silicate, stannate, titanate or zirconate as a reaction rate and core rheology modifier and chlorine suppresser. The oxygen generating compositions also contain about 0.1-15% by weight of a transition metal oxide catalyst; and the remainder is substantially an alkali metal chlorate or perchlorate.

Claims

1. In an oxygen generating composition for producing a breathable oxygen gas upon ignition of the composition, the oxygen generating composition comprising about 0.5-15% by weight of a metal fuel;

about 0.1% to about 15% by weight of at least one transition metal oxide catalyst;

about 0.1 to about 20% by weight of an additive selected from the group consisting of an alkali metal silicate, an alkali metal stannate, an alkali metal titanate, an alkali metal zirconate, and mixtures thereof; and

the remainder substantially comprising an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof, the improvement wherein said metal fuel is substantially carbon-free copper.

2. The oxygen generating composition of claim 1, wherein said transition metal oxide catalyst is selected from the group consisting of cobalt oxide, copper oxide, nickel oxide, iron oxide, manganese oxide, and mixtures thereof.

3. The oxygen generating composition of claim 1, wherein said transition metal oxide catalyst is selected from the group consisting of cobalt oxide, copper oxide and nickel oxide.

4. The oxygen generating composition of claim 1, wherein said additive is selected from the group consisting of sodium metasilicate and sodium orthosilicate.

5. The oxygen generating composition of claim 1, further comprising a binder selected from the group consisting of glass powder, fiber glass and mixtures thereof.

6. The oxygen generating composition of claim 1, wherein said transition metal oxide catalyst is Co₃O₄.