US2002023699A1PendingUtilityA1

Gas generant composition

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Assignee: DAICEL CHEMPriority: Dec 21, 1994Filed: Aug 31, 2001Published: Feb 28, 2002
Est. expiryDec 21, 2014(expired)· nominal 20-yr term from priority
Inventors:Kazuyuki MatsuokaShogo Tomiyama
C06B 23/02C06D 5/06Y10S149/11Y10S149/114
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Claims

Abstract

A gas generant is provided which decreases toxic components, in particular carbon monoxide and nitrogen oxides, in generated gas to a concentration practical as an air bag system for automobile. A nitrogen-containing organic compound such as a compound containing amino group or amido group or a tetrazole derivative and a oxygen-containing inorganic oxidizer such as KNO 3 , Sr(NO 3 ) 2 or KClO 4 are essential components. Therewith one or more metal oxides are contained in the mixed catalyst of the gas generant composition. The oxide is selected from manganese dioxide having a specific surface area not less than 50 m 2 /g; copper oxide having a specific surface area not less than 1 m 2 /g; molybdenum oxides such as molybdenum dioxide, molybdenum trioxide, molybdic acid and ammonium molybdate; and copper oxides, cobalt oxides, iron oxides and siver oxides.

Claims

exact text as granted — not AI-modified
1 . A gas generant composition comprising a nitrogen-containing organic compound, an oxygen-containing inorganic oxidizer, and a third component of at least one selected from the following (1) through (4): 
 (1) manganese dioxide having a specific surface area not less than 50 m 2 /g;    (2) copper oxide having a specific surface area not less than 1 m 2 /g;    (3) a molybdenum compound of at least one selected from the group consisting of molybdenum dioxide, molybdenum trioxide, molybdic acid and ammonium molybdate; and    (4) a mixture of manganese dioxide and at least one metal oxide selected from the group consisting of copper oxides, cobalt oxides, iron oxides and silver oxides.    
     
     
         2 . The composition according to  claim 1  wherein the third component is (1) mentioned above and has a specific surface area from 100 m 2 /g to 300 m 2 /g.  
     
     
         3 . The composition according to  claim 1  wherein the third component is (1) mentioned above is contained in an amount of 1 through 40% by weight of the composition.  
     
     
         4 . The composition according to  claim 1  wherein the third component is (2) mentioned above and has a specific surface area from 1.5 m 2 /g to 100 m 2 /g.  
     
     
         5 . The composition according to  claim 1  wherein the third component is (2) mentioned above and has an average particle size not more than 5 microns.  
     
     
         6 . The composition according to  claim 1  wherein the third component is (2) mentioned above and has an average particle size from 0.5 microns to 5 microns.  
     
     
         7 . The composition according to  claim 1  wherein the third component is (2) mentioned above is contained in an amount of 1 through 40% by weight of the composition.  
     
     
         8 . The composition according to  claim 1  wherein the third component is (3) mentioned above is contained in an amount of 1 through 40% by weight of the composition.  
     
     
         9 . The composition according to  claim 1  wherein the metal oxide is at least one selected from the group consisting of CuO, Cu 2 O, Co 3 O 4 , Fe 2 O 3  and Ag 2 O.  
     
     
         10 . The composition according to  claim 1  wherein the third component is (4) mentioned above and the ratio of manganese dioxide to the metal oxide by weight is 0.2 through 50.  
     
     
         11 . The composition according to  claim 1  wherein the third component is (4) mentioned above is contained in an amount of 1 through 40% by weight of the composition.  
     
     
         12 . The composition according to  claim 1  wherein the nitrogen-containing organic compound is at least one selected from the group consisting of organic compounds containing amino group or amido group and tetrazole derivatives.  
     
     
         13 . The composition according to  claim 12  wherein the organic compound containing amino group or amido group is azodicarbonamide or dicyandiamide.  
     
     
         14 . The composition according to  claim 12  wherein the tetrazole derivative is aminotetrazole.  
     
     
         15 . The composition according to  claim 1  wherein the oxygen-containing inorganic oxidizer is at least one selected from the group consisting of KNO 3 , Sr(NO 3 ) 2  and KClO 4 .  
     
     
         16 . The composition according to  claim 1  wherein the oxygen-containing inorganic oxidizer is a mixture of Sr(NO 3 ) 2  and KClO 4 .  
     
     
         17 . The composition according to  claim 1  wherein the nitrogen-containing organic compound is azodicarbonamide and the oxygen-containing inorganic oxidizer is KClO 4 .  
     
     
         18 . The composition according to  claim 1  wherein the third component is (1) mentioned above.  
     
     
         19 . The composition according to  claim 1  wherein the third component is (2) mentioned above and has a specific surface area not less than 1 m 2 /g and an average particle size not more than 5μ.  
     
     
         20 . The composition according to  claim 1  wherein the third component is (3) mentioned above.  
     
     
         21 . The composition according to  claim 1  wherein the third component is (4) mentioned above.  
     
     
         22 . The composition according to  claim 1  wherein two or more third components are contained.  
     
     
         23 . The composition according to  claim 1  wherein two or more third components are contained in an amount of 1 through 40% by weight of the composition.  
     
     
         24 . An airbag system wherein the composition according to  claim 1  is contained as the gas generant.

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