Gas generating agent composition and gas generator

• US 6,517,647 B1
• Filed: 11/23/1999
• Issued: 02/11/2003
• Est. Priority Date: 11/23/1999
• Status: Expired due to Term

• Current Assignee: Daicel Chemical Industries Limited
• Original Assignee: Daicel Chemical Industries Limited
• Inventors: Yamato, Yo
• Primary Examiner(s): Carone, Michael J.
• Assistant Examiner(s): FELTON, AILEEN BAKER
• Application Number:
  US09/447,431
• Time in Patent Office: 1,176 Days
• Field of Search: 149/45, 149/61, 149/36, 149/37
• US Class Current: 149/45
• CPC Class Codes: C06B 23/005 Desensitisers, phlegmatisers coolants for mining explosives C06B23/04; deactivating C06B21/0091
• CPC Class Codes: C06B 23/02 for neutralising poisonous gases from explosives produced during blasting
• CPC Class Codes: C06D 5/06 by reaction of two or more solids

Abstract

A gas generating composition having an improved thermal stability of a fuel is obtained.

A gas generating compostion comprising a gas generating agent containing a non-sodium azide compound fuel and an oxidizing agent, and an adsorbent. Since substances accelerating decomposition of a fuel, such as radicals generating by decomposition of the fuel are adsorbed and kept on the adsorbent, further decomposition of the fuel is inhabited, so that the thermal stability is increased.

Claims

1. A gas generating composition comprising a gas generating agent containing a non-sodium azide compound fuel, an oxidizing agent, and an adsorbent, wherein the adsorbent is a member selected from the group consisting of activated alumina, silica gel, clay, solid superacid, and solid phosphoric acid.

2. The gas generating composition of claim 1, wherein the non-sodium azide compound fuel is a nitrogen-containing compound.

3. The gas generating composition of claim 2, wherein the non-sodium azide compound fuel is a member selected from the group consisting of tetrazole derivatives and guanidine derivatives.

4. The gas generating composition of claim 1, wherein the oxidizing agent is a member selected from the group consisting of an oxyacid salt, a metal oxide, and a metal double oxide.

5. The gas generating composition of claim 1, wherein the oxidizing agent is a basic metal nitrate.

6. The gas generating composition of claim 1, wherein the gas generating agent and the adsorbent are not integrally molded.

7. The gas generating composition of claim 1, wherein a gas generating agent molded article and an adsorbent molded article are mixed.

8. The gas generating composition of claim 1, wherein the gas generating agent and the adsorbent are not in contact with one another.

9. The gas generating composition of claim 1, wherein the weight loss ratio of the gas generating agent when the gas generating composition is kept at 110°

C. for 400 hours in a closed state is 2% or less.

10. A gas generator apparatus which comprises the gas generating composition according to claim 1.

11. An inflator system which comprises the gas generator apparatus according to claim 10.