EP0482852A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Azide-free gas generant composition with easily filterable combustion products
Assignee: Automotive Systems Laboratory Inc
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Filing: 1991-10-18
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Granted: —
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Expires: 2011-10-18
Abstract
Abstract A gas generant composition devoid of azides which yields solid combustion products which are easily filtered rendering the gases useful for inflating automobile occupant restraint bags.
Inventors
- 👤 Donald R. Poole
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
CPC Classifications
C; C06; C06B; C06B35/00; C06D; C06D5/00; C06D5/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
201 words
A pyrotechnic, slag-forming gas generating mixture useful for inflating an automobile or aircraft safety crash bag, said pyrotechnic mixture comprising at least one each of the following materials: a. a fuel selected from the group of tetrazole compounds consisting of aminotetrazole, tetrazole, bitetrazole and metal salts of these compounds as well as triazole compounds and metal salts of triazole compounds; b. an oxygen-containing oxidizer compound selected from the group consisting of alkali metal, alkaline earth metal, lanthanide and ammonium nitrates and perchlorates or from the group consisting of alkali metal or alkaline earth metal chlorates or peroxides; c. a high temperature slag-forming material selected from the group consisting of alkaline earth metal or transition metal oxides, hydroxides, carbonates, oxalates, peroxides, nitrates, chlorates and perchlorates or from the group consisting of alkaline earth metal salts of tetrazoles, bitetrazoles and triazoles; and d. a low-temperature slag forming material selected from the group consisting of silicon dioxide, boric oxide and vanadium pentoxide or from the group consisting of alkali metal silicates, borates, carbonates, nitrates, perchlorates or chlorates or from the group consisting of alkali metal salts of tetrazoles, bitetrazoles and triazoles or from the group consisting of the various naturally occurring clays and talcs.
Claim 2
Dependent Claim
34 words
The composition of claim 1 wherein both the fuel and the high-temperature slag-forming material are comprised of one or more of the group consisting of alkaline earth metal salts of tetrazoles, bitetrazoles and triazoles.
Claim 3
Dependent Claim
37 words
The composition of claim 1 wherein both the oxygen-containing oxidizer compound and the high-temperature slag-forming material are comprised of one or more of the group consisting of alkaline earth metal and lanthanide nitrates, perchlorates, chlorates and peroxides.
Claim 4
Dependent Claim
33 words
The composition of claim 1 wherein both the fuel and the low-temperature slag-forming material are comprised of one or more of the group consisting of alkali metal salts of tetrazoles, bitetrazoles and triazoles.
Claim 5
Dependent Claim
36 words
The composition of claim 1 wherein both the oxygen containing oxidizer compound and the low-temperature slag forming material are comprised of one or more of the group consisting of alkali metal nitrates, perchlorates, chlorates and peroxides.
Claim 6
Dependent Claim
75 words
The composition of claim 1 wherein the fuel is 5-aminotetrazole which is present in a concentration of about 22 to about 36% by weight, said oxygen-containing oxidizer compound and high-temperature slag former is strontium nitrate which is present in a concentration of about 38 to about 62% by weight, and said low-temperature slag former is silicon dioxide, boric acid or clay, which is present in a concentration of about 2 to about 18% by weight.
Claim 7
Dependent Claim
77 words
The composition of claim 1 wherein the fuel and high-temperature slag-forming material is the strontium salt of 5-aminotetrazole which is present in a concentration of about 30 to about 50% by weight, said oxygen-containing oxidizer compound is potassium nitrate which is present in a concentration of about 40 to about 60% by weight and said low temperature slag former is talc or clay which is present in a concentration of about 2 to about 10% by weight.
Claim 8
Dependent Claim
92 words
The composition of claim 1 wherein the fuel is 5-aminotetrazole which is present in a concentration of about 22 to about 36% by weight, said oxygen-containing oxidizer compound is sodium nitrate which is present in a concentration of about 30 to about 50% by weight, said high-temperature slag forming material is magnesium carbonate or magnesium hydroxide which is present in a concentration of about 8 to about 30% by weight and said low-temperature slag former is silicon dioxide which is present in a concentration of about 2 to about 20% by weight.
Claim 9
Dependent Claim
103 words
The composition of claim 1 wherein the potassium salt of 5-aminotetrazole present in a concentration of about 2 to about 30% by weight serves in part as a fuel and in part as a low-temperature slag former and wherein 5-aminotetrazole in a concentration of about 8 to about 40% by weight also serves as a fuel, and wherein clay in a concentration of about 2 to about 10% by weight serves in part as the low-temperature slag former and wherein strontium nitrate in a concentration of about 40 to about 66% by weight serves as both the oxygen-containing oxidizer and high-temperature slag former.
Claim 10
Dependent Claim
67 words
A slag-forming gas generating composition for an inflatable occupant restraint system according to claim 1 comprising a mixture of: (a) about 22 to about 30 percent by weight of 5-aminotetrazole, (b) about 10 to about 40 percent by weight of iron oxide, (c) about 30 to about 50 percent by weight of sodium nitrate, and (d) about 2 to about 20 percent by weight of silicon dioxide.
Claim 11
Dependent Claim
68 words
A slag forming gas generating composition for an inflatable occupant restraint system according to claim 1 comprising a mixture of: (a) about 22 to about 36 percent by weight of 5-aminotetrazole, (b) about 8 to about 62 percent by weight of strontium nitrate, (c) about 0 to about 42 percent by weight of sodium nitrate, and (d) about 2 to about 18 percent by weight of silicon dioxide.
Claim 12
Dependent Claim
71 words
A slag forming gas generating composition for an inflatable occupant restraint system according to claim 1 comprising a mixture of: (a) about 22 to about 36 percent by weight of 5-aminotetrazole, (b) about 30 to about 50 percent by weight of sodium nitrate, (c) about 8 to about 30 percent by weight of magnesium carbonate or magnesium hydroxide, and (d) about 2 to about 20 percent by weight of silicon dioxide.
Claim 13
Dependent Claim
57 words
A slag forming gas generating composition for an inflatable occupant restraint system according to claim 1 comprising a mixture of: (a) about 20 to about 34 percent by weight of 1,2, 4-triazole-5-one, (b) about 40 to about 78 percent by weight of strontium nitrate, and (c) about 2 to about 20 percent by weight of silicon dioxide.
References Cited (Backward Citations)
FR2193801A1
Cited
DE2351401A1
Cited
US4214438A
Cited
US4376002A
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EP0055547A1
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US4948439A
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US4931111A
Cited
US4931112A
Cited
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