Ignition composition for inflator gas generators

• US 5,084,118 A
• Filed: 10/23/1990
• Issued: 01/28/1992
• Est. Priority Date: 10/23/1990
• Status: Expired due to Term

• Current Assignee: Automotive Systems Laboratory, Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Automotive Systems Laboratory, Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Poole, Donald R.
• Primary Examiner(s): Lechert, Jr., Stephen J.
• Application Number:
  US07/601,528
• Time in Patent Office: 462 Days
• Field of Search: 149/22, 149/38, 149/42, 149/78, 149/88
• US Class Current: 149/22
• CPC Class Codes: C06B 29/16 with a nitrated organic compound
• CPC Class Codes: C06C 9/00 Chemical contact igniters; Chemical lighters

Abstract

An autoigniting composition for the gas generator of a vehicle occupant restraint system that is thermally stable at temperatures up to 110° C., will not autoignite at 150° C., but when heated to approximately 177° C. will undergo rapid autoignition.

Claims

1. An autoigniting composition for the gas generator of a vehicle occupant restraint system comprising a mixture of from about 40% to 67% by weight of sodium chlorate, from about 16.5% to 40% by weight of 5-aminotetrazole, and from about 11.3% to 20% by weight of 2,4-dinitrophenylhydrazone.

2. An autoigniting composition for the gas generator of a vehicle occupant restraint system comprising a mixture of about 60% by weight of potassium chlorate, about 20% by weight of 5-aminotetrazole, and about 20% by weight of 2,4-dinitrophenylhydrazone.

3. The composition of claim 2 including 4% to 10% by weight of a polycarbonate resin dissolved in methylene chloride.

4. The composition of claim 2 including 4% to 10% by weight of thermoplastic rubber dissolved in toluene.

5. An autoigniting composition for the gas generator of a vehicle occupant restraint system comprising a mixture of about 65% by weight of potassium chlorate, about 16.5% by weight of 5-aminotetrazole, about 16.5% by weight of 2,4-dinitrophenylhydrazone, and about 2% to 4% by weight of a metal powder selected from the group consisting of titanium, zirconium, boron and aluminum.

6. An autoignition composition for the gas generator of a vehicle occupant restraint system comprising a mixture of from about 16% to 40% by weight 5-aminotetrazole, from about 11% to 40% by weight, 2,4-dinitrophenylhydrazone, and from about 40% to 67% by weight of an oxidizer selected from the group consisting of alkali metal or alkaline earth metal chlorates.

7. An autoignition composition for the gas generator of a vehicle occupant restraint system comprising a mixture of from about 16% to 40% by weight 5-aminotetrazole, from about 11% to 40% by weight of an active material selected from the group consisting of the aldehyde or ketone hydrazone derivatives of 2,4-dinitrophenylhydrazone and from about 40% to 67% by weight of an oxidizer selected from the group consisting of alkali metal or alkaline earth metal chlorates.