Method of tetrazole amine salts having improved physical properties for generating gas in airbags

• US 5,439,251 A
• Filed: 11/29/1993
• Issued: 08/08/1995
• Est. Priority Date: 11/30/1992
• Status: Expired due to Term

• Current Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Original Assignee: Toyo Kasei Kogyo Co., Ltd. (Toyobo Company Limited)
• Inventors: Tanaka, Hiroshi, Onishi, Atsuhiro
• Primary Examiner(s): Springer, David B.
• Application Number:
  US08/158,307
• Time in Patent Office: 617 Days
• Field of Search: 548/250, 280/728 R
• US Class Current: 280/741
• CPC Class Codes: C07D 257/04 Five-membered rings

Abstract

Tetrazoles of improved physical properties as produced by converting them into their amine salts represented by the following chemical formula (1): ##STR1## wherein R represents hydrogen, alkyl, phenyl, benzyl or phenethyl group, which may be substituted by an alkyl with carbon number 1-3, chlorine, hydroxyl, carboxyl, methoxy, aceto, nitro or other group, and wherein R may also be tetrazolyl group, which may be substituted via diazo or triazo group, and wherein Z is an amine.

The tetrazole amine salts are useful as gas-generating agents for air-bags or as foaming agents for high polymers.

Claims

1. An airbag assembly which comprises an airbag and, as a gas generating agent therefor, tetrazole amine salts of formula (I) ##STR3## wherein R represents methyl or tetrazolyl, and wherein Z is a member selected from the group consisting of methylamine, ethylamine, n-propylamine, isopropylamine, n-butylamine, tert-butylamine, n-pentylamine, n-hexylamine, aniline, benzylamine, phenethylamine, 1-amino-4-phenylbutane, benzhydrylamine, cyclohexylamine, dimethylamine, diethylamine, di-n-propyl amine, di-n-pentylamine, di-n-hexylamine, propyleneimine, pyrrolidine, piperidine, N-methylmorpholine, trimethylamine, triethylamine, tri-n-pentylamine, tri-n-hexylamine, triphenlyamine, pyridine, 1,8-diazabicyclo-[5,4,0]-7-undecene, hydrazine, trimethylenediamine, pentamethylenediamine, hexamethylenediamine, piperazine, m-phenylendiamine, 1,3-diazocyclohexane, triethylendiamine, N, N, N'"'"', N'"'"'-tetramethylethylenediamine, ammonia, urea, carbohydrazide, thiocarbohydrazide, azodicarbonamide, guanidine, dicyandiamide, aminoguanidine, N, N'"'"'-bis (3-aminopropyl) piperazine, melamine, acetoguanamine, 3-amino-1,2,4-tetrazole and hexamethylenetetramine.

2. A method of generating gas for airbags which comprises employing as the gas generating agent a tetrazole amine salts of formula (I) ##STR4## wherein R represents methyl or tetrazolyl, and wherein Z is a member selected from the group consisting of methylamine, ethylamine, n-propylamine, isopropylamine, n-butylamine, tert-butylamine, n-pentylamine, n-hexylamine, aniline, benzylamine, phenethylamine, 1-amino-4-phenylbutane, benzhydrylamine, cyclohexylamine, dimethylamine, diethylamine, di-n-propyl amine, di-n-pentylamine, di-n-hexylamine, propyleneimine, pyrrolidine, piperidine, N-methylmorpholine, trimethylamine, triethylamine, tri-n-pentylamine, tri-n-hexylamine, triphenlyamine, pyridine, 1,8-diazabicyclo-[5,4,0]-7-undecene, hydrazine, trimethylenediamine, pentamethylenediamine, hexamethylenediamine, piperazine, m-phenylendiamine, 1,3-diazocyclohexane, triethylendiamine, N, N, N'"'"', N'"'"'-tetramethylethylenediamine, ammonia, urea, carbohydrazide, thiocarbohydrazide, azodicarbonamide, guanidine, dicyandiamide, aminoguanidine, N, N'"'"'-bis (3-aminopropyl) piperazine, melamine, acetoguanamine, 3-amino-1,2,4-tetrazole and hexamethylenetetramine.