Oxygen generating formulation with high structural integrity

• US 6,193,907 B1
• Filed: 04/07/2000
• Issued: 02/27/2001
• Est. Priority Date: 01/30/1998
• Status: Expired due to Term

• Current Assignee: BE Intellectual Property, Inc. (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: BE Intellectual Property, Inc. (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: Kshirsagar, Girish S., Cannon, James C., Zhang, Yunchang
• Primary Examiner(s): ANTHONY, JOSEPH DAVID
• Application Number:
  US09/545,636
• Time in Patent Office: 326 Days
• Field of Search: 252/187.31, 252/187.1, 422/126
• US Class Current: 252/187.31
• 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

Abstract

The chlorate/perchlorate based oxygen generating compositions contain about 0.5-15% by weight of metal powder for use as a fuel selected from the group consisting of iron, nickel, cobalt and mixtures thereof; about 0.1% to about 15% by weight of at least one transition metal oxide catalyst; greater than 5% to about 25% by weight of an alkali metal silicate as a reaction rate and core rheology modifier, binder and chlorine suppresser; and the remainder substantially comprising an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof. The alkali metal silicate can be selected from the group consisting of sodium metasilicate, sodium orthosilicate, lithium metasilicate, potassium silicate, and mixtures thereof. The oxygen generating composition can also optionally contain a binder selected from the group consisting of glass powder, fiber glass and mixtures thereof.

Claims

1. An improvement in an oxygen generating composition for producing a breathable oxygen gas upon ignition of the composition, the oxygen generating composition comprising about 0.5 to about 15% by weight of an iron metal powder fuel, and about 0.1% to about 15% by weight of a transition metal oxide catalyst, the improvement in said oxygen generating composition comprising:

from 11% to about 25% by weight of an alkali metal silicate as a reaction rate and core rheology modifier and chlorine suppresser; and

the remainder substantially comprising an oxygen source selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, and mixtures thereof.

2. The oxygen generating composition of claim 1, wherein said alkali metal silicate is selected from the group consisting of sodium metasilicate, sodium orthosilicate, lithium metasilicate, potassium silicate, 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, nickel oxide, iron oxide, manganese oxide, and mixtures thereof.

4. The oxygen generating composition of claim 1, wherein said transition metal oxide catalyst comprises about 0.1 to 15% by dry weight of the oxygen generating composition and said transition metal oxide catalyst is selected from the group consisting of cobalt oxide, copper oxide and nickel oxide.

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.