US5531941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing azide-free gas generant composition
Assignee: Automotive Systems Laboratory Inc
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Filing: 1995-06-06
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Granted: 1996-07-02
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Expires: 2015-06-06
Abstract
Abstract Gas generant compositions without highly toxic azides are provided which, upon combustion, are converted into gaseous products with only small amounts of solid combustion products thereby minimizing the gas filtration problem. A process for safely preparing gas generants which utilize the nitrogen containing fuel TAGN in the composition are provided. These compositions are especially suitable for inflating automotive and aircraft occupant restraint bags. The present invention advantageously and safely combines TAGN with phase stabilized ammonium nitrate (PSAN) to achieve production of a high volume of non-toxic gas with only small amounts of solid combustion products.
Inventors
- 👤 Donald R. Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:12
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/02; C06B47/08; C06D; C06D5/00; C06D5/06; B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/263; C06B25/00; C06B25/34; C06B31/00; C06B31/28; C06B43/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A process for preparing an azide-free gas generant composition that produces exhaust gases on combustion for inflating vehicle or aircraft occupant restraint devices, said composition comprising a mixture of phase stabilized ammonium nitrate (PSAN) and triaminoguanidine nitrate (TAGN), said process comprising the steps of (a) mixing weighed amounts of ammonium nitrate and potassium nitrate with wet triaminoguanidine nitrate and drying and grinding the resulting dry mixture to a powder, and (b) molding the powder under pressure into pellets.
Claim 2
Dependent Claim
78 words
A process for preparing an azide-free gas generant composition that produces exhaust gases on combustion for inflating vehicle or aircraft occupant restraint devices, said composition comprising a mixture of phase stabilized ammonium nitrate (PSAN) and triaminoguanidine nitrate (TAGN), said process comprising the steps of (a) mixing weighed amounts of ammonium nitrate and potassium nitrate with wet triaminoguanidine nitrate and drying and grinding the resulting dry mixture to a powder, and (b) molding the powder under pressure into pellets.
Claim 3
Dependent Claim
108 words
A process for preparing an azide-free gas generant composition that produces exhaust gases on combustion for inflating vehicle or aircraft occupant restraint devices, said composition comprising a mixture of phase stabilized ammonium nitrate (PSAN) and triaminoguanidine nitrate (TAGN), said process comprising the steps of (a) making triaminoguanidine nitrate that is wet with water or alcohol by a wet process, (b) mixing weighed amounts of dry ammonium nitrate and dry potassium nitrate with a weighed amount of triaminoguanidine nitrate to obtain a wet gas generant mixture, (c) drying and grinding the thus dried gas generant mixture to obtain a powder, and (d) molding the powder under pressure into pellets.
Claim 4
Dependent Claim
108 words
A process for preparing an azide-free gas generant composition that produces exhaust gases on combustion for inflating vehicle or aircraft occupant restraint devices, said composition comprising a mixture of phase stabilized ammonium nitrate (PSAN) and triaminoguanidine nitrate (TAGN), said process comprising the steps of (a) making triaminoguanidine nitrate that is wet with water or alcohol by a wet process, (b) mixing weighed amounts of dry ammonium nitrate and dry potassium nitrate with a weighed amount of triaminoguanidine nitrate to obtain a wet gas generant mixture, (c) drying and grinding the thus dried gas generant mixture to obtain a powder, and (d) molding the powder under pressure into pellets.
Claim 5
Dependent Claim
39 words
The process according to claim 1 or 2 wherein the ratio of PSAN to TAGN is adjusted such that upon combustion the amount of oxygen allowed in the equilibrium exhaust gases is less than 2.0% to 3.0% by volume.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-02 | 2000-01-01 | 2000-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-02 | 2004-01-01 | 2004-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-02 | 2008-01-01 | 2008-07-02 | $7700.00 | Window Closed / Lapsed |