Gas generating compositions

• US 3,883,373 A
• Filed: 07/02/1973
• Issued: 05/13/1975
• Est. Priority Date: 07/24/1972
• Status: Expired due to Term

• Current Assignee: Eric William Sidebottom
• Original Assignee: Eric William Sidebottom
• Inventors: Sidebottom, Eric William
• Primary Examiner(s): Lechert, Jr., Stephen J.
• Application Number:
  US05/375,654
• Time in Patent Office: 680 Days
• Field of Search: 149/6,35,37,75,40,77,45,36,42,41,43
• US Class Current: 149/6
• CPC Class Codes: C06B 23/00 Compositions characterised by non-explosive or non-thermic constituents in combination with specific explosives C06B25/20, C06B25/26, C06B29/04, C06B29/08, C06B31/06, C06B31/40, C06B33/02
• CPC Class Codes: C06B 35/00 Compositions containing a metal azide
• CPC Class Codes: C06D 5/06 by reaction of two or more solids

Abstract

A gas generating composition having as ingredients an alkali or alkaline earth metal azide, an oxidizing compound, an oxide such as silica or alumina, and optionally, a metal such as silicon or aluminum. The composition is useful as a source of gas to inflate bags used as restraint systems for the protection of automobile passengers.

Claims

1. AN ALKALI METAL AZIDE OR AN ALKALINE EARTH METAL AZIDDE,

2. an oxidizing compound in proportion suffiCient to react completely with said azide with the liberation of nitrogen therefrom, and

3. AN OXIDE SELECTED FROM THE GROUP CONSISTING OF SILICON DIOXIDE, ALUMINUM OXIDE, TITANIUM DIOXIDE, TIN OXIDE AND ZINC OXIDE, WITH OR WITHOUT ADMIXTURE WITH A METAL SELECTED FROM THE GROUP CONSISTING OF SILICON, ALUMINUM, TIN AND ZINC, SAID OXIDE AND METAL BEING IN PROPORTION SUFFICIENT TO REACT WITH ALL THE METALLIC RESIDUE OF THE REACTION BETWEEN (1) ANS (2).

4. A gas generating composition as claimed in claim 1 wherein the oxidizing compound is an inorganic perchlorate selected from the group consisting of lithium perchlorate, sodium perchlorate, potassium perchlorate, rubidium perchlorate, magnesium perchlorate, calcium perchlorate, strontium perchlorate, barium perchlorate, ferric perchlorate and cobalt perchlorate.

5. A gas generating composition as claimed in claim 1 wherein the oxidizing compound is a metal nitrate selected from the group consisting of lithium nitrate, sodium nitrate, potassium nitrate, copper nitrate, silver nitrate, magnesium nitrate, barium nitrate, zinc nitrate, aluminum nitrate, thallium nitrate, stannic nitrate, bismuth nitrate, manganese nitrate, ferric nitrate, ferrous nitrate and nickel nitrate.

6. A gas generating composition as claimed in claim 1 including as ingredient fumed silica coated with a water repellent.

7. A gas generating composition as claimed in claim 6 wherein the water repellant is a silane.

8. A gas generating composition as claimed in claim 6 wherein the fumed silica ingredient comprises 2% by weight of the composition.