Patent US5439251A successfully refreshed from Google Patents.
US5439251A
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US
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Method of tetrazole amine salts having improved physical properties for generating gas in airbags
Assignee: Toyobo Co Ltd
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Filing: 1993-11-29
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Granted: 1995-08-08
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Expires: 2013-11-29
Abstract
Abstract Tetrazoles of improved physical properties as produced by converting them into their amine salts represented by the following chemical formula (1): yl, 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.
Inventors
- 👤 Atsuhiro Onishi
- 👤 Hiroshi Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:59
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
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.
Claim 2
Dependent Claim
99 words
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.
Claim 3
Independent Claim
101 words
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.
Claim 4
Independent Claim
101 words
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.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-08-07 | 1999-02-06 | 1999-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-07 | 2003-02-06 | 2003-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-07 | 2007-02-06 | 2007-08-08 | $7700.00 | Window Closed / Lapsed |