US5756929A
Expired / Lapsed
US
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Nonazide gas generating compositions
Assignee: Automotive Systems Laboratory Inc
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Filing: 1996-02-14
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Granted: 1998-05-26
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Expires: 2016-02-14
Abstract
Abstract Multicomponent pyrotechnic gas generating compositions are provided which comprise a single or multiple nonazide fuel. The single and multiple fuels are selected from guanidine, azole, and other high nitrogen aliphatic, aromatic, and/or heterocyclic compounds. The fuels are blended with single and multiple oxidizers. Other materials are added to the compositions for processing, aiding ignition, enhancing ballistics, reducing particulates, and scavenging undesirable gaseous decomposition products. A significant amount of nontoxic gas is formed at acceptable flame temperatures when these compositions are combusted, which allow their use in automotive air bag safety systems.
Inventors
- 👤 Norman H. Lundstrom
- 👤 Paresh S. Khandhadia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:55
CPC Classifications
C; C06; C06B; C06B25/00; C06D; C06D5/00; C06D5/06; C06B33/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A gas generant composition useful for inflating an automotive air bag passive restraint system containing as a fuel at least one high nitrogen nonazide constituent selected from the group consisting of guanidine nitrate, aminoguanidine nitrate, nitroguanidine, nitroaminoguanidine, diaminoguanidine nitrate, guanidine perchlorate, and guanidine picrate, wherein: said fuel further consists of diammonium bitetrazole; and said fuel is employed in a concentration of 5 to 85% by weight of the gas generant composition.
Claim 2
Dependent Claim
71 words
A gas generant composition useful for inflating an automotive air bag passive restraint system containing as a fuel at least one high nitrogen nonazide constituent selected from the group consisting of guanidine nitrate, aminoguanidine nitrate, nitroguanidine, nitroaminoguanidine, diaminoguanidine nitrate, guanidine perchlorate, and guanidine picrate, wherein: said fuel further consists of diammonium bitetrazole; and said fuel is employed in a concentration of 5 to 85% by weight of the gas generant composition.
Claim 3
Dependent Claim
70 words
A gas generant composition useful for inflating an automotive air bag passive restraint system containing as a fuel at least one high nitrogen nonazide constituent selected from the group consisting of guanidine nitrate, aminoguanidine nitrate, nitroguanidine, nitroaminoguanidine, diaminoguanidine nitrate, guanidine perchlorate, and guanidine picrate, wherein: said fuel further consists of 2,4,6-trihydrazino-s-triazine; and said fuel is employed in a concentration of 5 to 85% by weight of the gas generant composition.
Claim 4
Dependent Claim
70 words
A gas generant composition useful for inflating an automotive air bag passive restraint system containing as a fuel at least one high nitrogen nonazide constituent selected from the group consisting of guanidine nitrate, aminoguanidine nitrate, nitroguanidine, nitroaminoguanidine, diaminoguanidine nitrate, guanidine perchlorate, and guanidine picrate, wherein: said fuel further consists of 2,4,6-trihydrazino-s-triazine; and said fuel is employed in a concentration of 5 to 85% by weight of the gas generant composition.
Claim 5
Dependent Claim
26 words
The gas generant composition of claim 2 wherein the fuel is employed in a concentration of 10 to 85% by weight of the gas generant composition.
Claim 6
Dependent Claim
23 words
The gas generant of claim 3 wherein the fuel is combined with from 10-85% by weight of the gas generant of an oxidizer.
Claim 7
Dependent Claim
31 words
The gas generant composition of claim 4 wherein the oxidizer is an alkali metal, alkaline earth metal, or transition metal nitrate, nitrite, chlorate, chlorite, perchlorate, chromate, oxide, sulphide, or mixtures thereof.
Claim 8
Dependent Claim
12 words
The gas generant composition of claim 1 containing finely divided elemental sulfur.
Claim 9
Dependent Claim
93 words
The gas generant composition of claim 5 further comprising a ballistic modifier selected from the group consisting of: cyanoguanidine; inorganic and organic salts of cyanoguanidine; oxides and halides of Group 4 to 12 of the IUPAC Periodic Table of Elements; sulfur, and metal sulfides; transition metal chromium salts; alkali metal and alkaline earth metal borohydrides; guanidine and triaminoguanidine borohydrides; organometallic compounds; nitroguanidine, guanidine chromate, guanidine dichromate, guanidine trichromate, and guanidine perchromate; and mixtures thereof; wherein the ballistic modifier is employed in a concentration of 0.01 to 20% by weight of the gas generant.
Claim 10
Dependent Claim
23 words
The gas generant of claim 1 wherein the fuel is combined with from 10-85% by weight of the gas generant of an oxidizer.
Claim 11
Dependent Claim
31 words
The gas generant composition of claim 8 wherein the oxidizer is an alkali metal, alkaline earth metal, or transition metal nitrate, nitrite, chlorate, chlorite, perchlorate, chromate, oxide, sulphide, or mixtures thereof.
Claim 12
Dependent Claim
30 words
The composition of claim 7 wherein the inorganic and organic salts of cyanoguanidine are selected from the group consisting of alkali, alkaline earth, transition metal, ammonium, guanidine, and triaminoguanidine salts.
Claim 13
Dependent Claim
23 words
The composition of claim 7 wherein the organometallic ballistic modifiers are selected from the group consisting of metallocenes, ferrocenes, and metal acetyl acetonates.
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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) | 2001-05-25 | 2001-11-24 | 2002-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-25 | 2005-11-24 | 2006-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-25 | 2009-11-24 | 2010-05-26 | $7700.00 | Window Closed / Lapsed |