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US4547235A
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Gas generant for air bag inflators
Assignee: Autoliv ASP Inc
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Filing: 1984-06-14
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Granted: 1985-10-15
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Expires: 2004-06-14
Abstract
Abstract In accordance with the present invention there are provided gas generating compositions comprising sodium azide, silicon dioxide, potassium nitrate, molybdenum disulfide and sulfur.
Inventors
- 👤 Fred E. Schneiter
- 👤 Allan J. McDonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:52
CPC Classifications
C; C06; C06D; C06D5/00; C06D5/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
142 words
A gas generant composition for generating an airbag inflating gas upon combustion comprising: a. about 60% to about 68% sodium azide, b. about 18% to about 24% silicon dioxide c. about 8% to about 20% potassium nitrate d. about 2% to about 20% molybdenum disulfide e. about 2% to about 4% sulfur, wherein said silicon dioxide and said potassium nitrate are provided in a gas generant burn rate controlling ratio of silicon dioxide to potassium nitrate of from 1:1 to 2:1, wherein said silicon dioxide and said potassium nitrate provide for the reduction of potentially caustic materials in said gas, the silicon dioxide reacting with the potassium from said potassium nitrate and sodium from said sodium azide generated upon combustion to form silicates in the form of an innocuous klinker; and wherein all percentages are by weight based on total composition weight.
Claim 2
Dependent Claim
142 words
A gas generant composition for generating an airbag inflating gas upon combustion comprising: a. about 60% to about 68% sodium azide, b. about 18% to about 24% silicon dioxide c. about 8% to about 20% potassium nitrate d. about 2% to about 20% molybdenum disulfide e. about 2% to about 4% sulfur, wherein said silicon dioxide and said potassium nitrate are provided in a gas generant burn rate controlling ratio of silicon dioxide to potassium nitrate of from 1:1 to 2:1, wherein said silicon dioxide and said potassium nitrate provide for the reduction of potentially caustic materials in said gas, the silicon dioxide reacting with the potassium from said potassium nitrate and sodium from said sodium azide generated upon combustion to form silicates in the form of an innocuous klinker; and wherein all percentages are by weight based on total composition weight.
Claim 3
Dependent Claim
14 words
A gas generating composition according to claim 1 which contains about 64% sodium azide.
Claim 4
Dependent Claim
14 words
A gas generating composition according to claim 1 which contains about 22% silicon dioxide.
Claim 5
Dependent Claim
14 words
A gas generating composition according to claim 1 which contains about 8% potassium nitrate.
Claim 6
Dependent Claim
14 words
A gas generating composition according to claim 1 which contains about 4% molybdenum disulfide.
Claim 7
Dependent Claim
13 words
A gas generating composition according to claim 1 which contains about 2% sulfur.
Claim 8
Dependent Claim
35 words
A gas generating composition according to claim 1 which contains: a. about 64% sodium azide, b. about 22% silicon dioxide, c. about 8% potassium nitrate, d. about 4% molybdenum disulfide and e. about 2% sulfur.
Claim 9
Dependent Claim
133 words
An air bag inflating composition, comprising the reaction products formed by combusting a composition containing: a. about 60% to about 68% sodium azide, b. about 18% to about 24% silicon dioxide c. about 8% to about 20% potassium nitrate d. about 2% to about 20% molybdenum disulfide e. about 2% to about 4% sulfur, wherein said silicon dioxide and said potassium nitrate are provided in a gas generant burn rate controlling ratio; wherein said silicon dioxide and said potassium nitrate provide for the reduction of potentially caustic materials in the effluent, the silicon dioxide reacting with the potassium from said potassium nitrate and sodium from said sodium azide generated upon combustion to form silicates in the form of an innocuous klinker; and wherein all percentages are by weight based on total composition weight.
Claim 10
Dependent Claim
133 words
An air bag inflating composition, comprising the reaction products formed by combusting a composition containing: a. about 60% to about 68% sodium azide, b. about 18% to about 24% silicon dioxide c. about 8% to about 20% potassium nitrate d. about 2% to about 20% molybdenum disulfide e. about 2% to about 4% sulfur, wherein said silicon dioxide and said potassium nitrate are provided in a gas generant burn rate controlling ratio; wherein said silicon dioxide and said potassium nitrate provide for the reduction of potentially caustic materials in the effluent, the silicon dioxide reacting with the potassium from said potassium nitrate and sodium from said sodium azide generated upon combustion to form silicates in the form of an innocuous klinker; and wherein all percentages are by weight based on total composition weight.
Claim 11
Dependent Claim
27 words
The composition of claim 8, wherein said gas generant burn rate controlling ratio of silicon dioxide to potassium nitrate falls within the range of 1:1 to 2:1.
Claim 12
Independent Claim
145 words
A method for inflating an airbag providing an airbag providing a gas generant composition for said airbag said gas generant composition including about 60% to about 68% sodium azide; about 2% to about 20% molybdenum disulfide; about 2-4% sulfur; about 18% to about 24% silicon dioxide; and about 8% to about 20% potassium nitrate; said silicon dioxide and potassium nitrate being present in a burn generant rate controlling ratio of silicon dioxide to potassium nitrate; wherein said silicon dioxide and said potassium nitrate provide for the reduction of potentially caustic materials in the effluent, the silicon dioxide reacting with the potassium from said potassium nitrate and sodium from said sodium azide generated upon combustion to form silicates in the form of an innocuous klinker; and igniting said gas generant composition, whereby said gas generant composition is combusted to generate a gas for inflating said airbag.
Claim 13
Independent Claim
145 words
A method for inflating an airbag providing an airbag providing a gas generant composition for said airbag said gas generant composition including about 60% to about 68% sodium azide; about 2% to about 20% molybdenum disulfide; about 2-4% sulfur; about 18% to about 24% silicon dioxide; and about 8% to about 20% potassium nitrate; said silicon dioxide and potassium nitrate being present in a burn generant rate controlling ratio of silicon dioxide to potassium nitrate; wherein said silicon dioxide and said potassium nitrate provide for the reduction of potentially caustic materials in the effluent, the silicon dioxide reacting with the potassium from said potassium nitrate and sodium from said sodium azide generated upon combustion to form silicates in the form of an innocuous klinker; and igniting said gas generant composition, whereby said gas generant composition is combusted to generate a gas for inflating said airbag.
Claim 14
Dependent Claim
23 words
The method of claim 10, wherein the ratio of silicon dioxide to potassium nitrate falls within the range of from 1:1 to 2:1.
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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) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |