EP1036781A1 - Air bag gas-generating composition with only a small amount of residue - Google Patents
Air bag gas-generating composition with only a small amount of residue Download PDFInfo
- Publication number
- EP1036781A1 EP1036781A1 EP98907271A EP98907271A EP1036781A1 EP 1036781 A1 EP1036781 A1 EP 1036781A1 EP 98907271 A EP98907271 A EP 98907271A EP 98907271 A EP98907271 A EP 98907271A EP 1036781 A1 EP1036781 A1 EP 1036781A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas generating
- potassium
- generating composition
- weight
- composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000203 mixture Substances 0.000 title claims abstract description 64
- 239000007789 gas Substances 0.000 claims abstract description 51
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000007800 oxidant agent Substances 0.000 claims abstract description 15
- IDCPFAYURAQKDZ-UHFFFAOYSA-N 1-nitroguanidine Chemical compound NC(=N)N[N+]([O-])=O IDCPFAYURAQKDZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004615 ingredient Substances 0.000 claims abstract description 4
- 238000002485 combustion reaction Methods 0.000 claims description 35
- 150000001875 compounds Chemical class 0.000 claims description 10
- -1 alkali metal salts Chemical class 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 229910001487 potassium perchlorate Inorganic materials 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 7
- 229910044991 metal oxide Inorganic materials 0.000 claims description 7
- 150000004706 metal oxides Chemical class 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 4
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical class OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims description 4
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims description 4
- 239000005749 Copper compound Substances 0.000 claims description 3
- 150000001845 chromium compounds Chemical class 0.000 claims description 3
- 150000001880 copper compounds Chemical class 0.000 claims description 3
- 150000002506 iron compounds Chemical class 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 150000002816 nickel compounds Chemical class 0.000 claims description 3
- VKJKEPKFPUWCAS-UHFFFAOYSA-M potassium chlorate Chemical compound [K+].[O-]Cl(=O)=O VKJKEPKFPUWCAS-UHFFFAOYSA-M 0.000 claims description 3
- 235000010333 potassium nitrate Nutrition 0.000 claims description 3
- 239000004323 potassium nitrate Substances 0.000 claims description 3
- 159000000001 potassium salts Chemical class 0.000 claims description 3
- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical class O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 150000003863 ammonium salts Chemical class 0.000 claims description 2
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 2
- XTEGARKTQYYJKE-UHFFFAOYSA-N chloric acid Chemical class OCl(=O)=O XTEGARKTQYYJKE-UHFFFAOYSA-N 0.000 claims description 2
- 229940005991 chloric acid Drugs 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- IRXRGVFLQOSHOH-UHFFFAOYSA-L dipotassium;oxalate Chemical compound [K+].[K+].[O-]C(=O)C([O-])=O IRXRGVFLQOSHOH-UHFFFAOYSA-L 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- XAEFZNCEHLXOMS-UHFFFAOYSA-M potassium benzoate Chemical compound [K+].[O-]C(=O)C1=CC=CC=C1 XAEFZNCEHLXOMS-UHFFFAOYSA-M 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- 239000012286 potassium permanganate Substances 0.000 claims description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 2
- 235000011151 potassium sulphates Nutrition 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 9
- PXIPVTKHYLBLMZ-UHFFFAOYSA-N Sodium azide Chemical compound [Na+].[N-]=[N+]=[N-] PXIPVTKHYLBLMZ-UHFFFAOYSA-N 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 3
- 239000005751 Copper oxide Substances 0.000 description 3
- 229910000431 copper oxide Inorganic materials 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 2
- 150000001540 azides Chemical class 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- GDDNTTHUKVNJRA-UHFFFAOYSA-N 3-bromo-3,3-difluoroprop-1-ene Chemical compound FC(F)(Br)C=C GDDNTTHUKVNJRA-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229910001963 alkali metal nitrate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- JGDFBJMWFLXCLJ-UHFFFAOYSA-N copper chromite Chemical compound [Cu]=O.[Cu]=O.O=[Cr]O[Cr]=O JGDFBJMWFLXCLJ-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- KTWOOEGAPBSYNW-UHFFFAOYSA-N ferrocene Chemical compound [Fe+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KTWOOEGAPBSYNW-UHFFFAOYSA-N 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- UAGLZAPCOXRKPH-UHFFFAOYSA-N nitric acid;1,2,3-triaminoguanidine Chemical compound O[N+]([O-])=O.NNC(NN)=NN UAGLZAPCOXRKPH-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000003536 tetrazoles Chemical class 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
- C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
- C06D5/06—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
Definitions
- the present invention concerns a gas generating composition for use in an air bag. More specifically, it relates to a gas generating composition with less residues for use in an air bag which forms an operation gas in an air bag system mounted in traffic facilities such as automobiles and used for protecting passengers.
- gas generating base agents used generally for air bag systems include inorganic azide compounds, particularly, sodium azide.
- Compositions comprising such inorganic azide compounds have no particular problems in view of burning characteristics and are generally put to practical use at present.
- sodium azide essentially has various undesired properties. For example, it is an extremely toxic substance and, further, sodium azide readily reacts with a heavy metal such as copper or lead to form a highly sensitive compound tending to cause abrupt ignition or explosion. Accordingly, a special handling is required for production, storage and disposal of such compositions.
- JP-A 3-208878 discloses a composition comprising, as essential ingredients, tetrazole, triazole or a metal salt thereof and an oxygen-containing oxidizer such as an alkali metal nitrate.
- an oxygen-containing oxidizer such as an alkali metal nitrate.
- a gas generating agent comprising a phase stabilized ammonium nitrate (PSAN) and nitrogen-containing compound such as triaminoguanidine nitrate is disclosed in the specification of WO95/04710. Further, a gas generating agent comprising a mixture of ammonium nitrate phase-stabilized with 7 to 20% by weight of a potassium salt and nitroguanidine is disclosed in US-A 5,545,272 and WO96/27574. Such compositions enable to increase the gas generating efficiency upon burning to a high level. However, heat of combustion is rather great and theoretical combustion temperature exceeds 2500K, and CO and NO x gases at high concentrations are generated.
- PSAN phase stabilized ammonium nitrate
- nitrogen-containing compound such as triaminoguanidine nitrate
- Nitrogen-containing compounds have a drawback that the heat of combustion is greater and the combustion temperature is higher compared with those of azide compounds in general combustion, when using an oxidizer in a stoichiometrical amount, that is, in an amount sufficient to form oxygen required for burning of carbon, hydrogen and other elements in the compound.
- an oxidizer in a stoichiometrical amount, that is, in an amount sufficient to form oxygen required for burning of carbon, hydrogen and other elements in the compound.
- a metal compound for example, metal oxide
- solid and liquid particles formed discharged from a gas generator may hit directly against a bag to possibly break the bag.
- the present invention provides a gas generating composition which generates less residues and a great amount of gases by combustion for inflating an air bag suitable to various purposes including the use as a shock absorbing safety bag for traffic facilities such as automobiles, wherein the composition comprises an oxidizer comprising a mixture comprising a phase stabilized ammonium nitrate (PSAN) and nitroguanidine as essential ingredients and the content of nitroguanidine in the composition is 35% by weight or less.
- PSAN phase stabilized ammonium nitrate
- the amount of residues generated is decreased compared with gas generating compositions disclosed so far and the use of the gas generating composition according to the present invention can remarkably decrease the number and the amount of additional parts for removing residues, to make way to the downsize of a gas generator itself.
- the gas generating composition according to the present invention suppresses the formation of solid residues as much as possible thereby enabling to remarkably decrease the number and the amount of additional parts compared with conventional gas generators, by utilizing the features that ammonium nitrate is entirely converted into non corrosive gases without forming solid residues upon combustion and generating no corrosive gases such as chlorine and hydrogen chloride.
- the combustion temperature can be lowered by about 150 to 300K and the heat of combustion can also be reduced to some extent compared with the existent compositions, by defining the content of nitroguanidine to 35% by weight or less, preferably, 5 to 33% by weight in the composition. Lowering of the combustion temperature is advantageous for decreasing toxic CO and NO x gases. Further, low combustion temperature and less heat of combustion are also advantageous for reducing additional parts in a gas generator.
- Table 1 shows the result of theoretical calculation for the combustion temperature and the heat of combustion with respect to the composition of the present invention in which nitroguanidine is blended by 35% by weight or less and an conventional composition.
- PSANKP10 indicates a phase stabilized ammonium nitrate comprising 90% by weight of ammonium nitrate and 10% by weight of potassium perchlorate and NQ indicates nitroguanidine.
- Pure ammonium nitrate causes phase transition with about 3% volumic change when passing a temperature of 32°C.
- Great volumic change of a molding product may possibly cause occurrence of abnormal combustion or burning which is not desirable for a gas generating agent. Accordingly, a phase stabilized ammonium nitrate is used in the present invention.
- phase stabilized ammonium nitrate used in the present invention, a mixture of 98 to 70% by weight of ammonium nitrate and 2 to 30% by weight of a phase stabilizer is preferred. It has been known generally to stabilize the phase of ammonium nitrate, for example, by introducing potassium cations into crystal lattices of ammonium nitrate. In the present invention, it is preferred to use at least one compound selected from the group consisting of organic or inorganic potassium salts being soluble in hot water. Phase transition of ammonium nitrate can be prevented by blending a phase stabilizer in an amount of 2% by weight or more in the phase stabilized ammonium nitrate. However, since an excessive blending amount of the phase stabilizer is disadvantageous for the purpose of decreasing solid residues, the blending amount of the phase stabilizer in the phase stabilized ammonium nitrate is preferably about from 2 to 30% by weight.
- the organic or inorganic potassium salts being soluble in hot water used as the phase stabilizer in the present invention can include at least one compound selected from the group consisting of potassium nitrate, potassium perchlorate, potassium sulfate, potassium chloride, potassium chlorate, potassium chromate, potassium bichromate, potassium permanganate and potassium oxalate.
- the gas generating composition according to the present invention comprises an oxidizer comprising a mixture comprising the phase stabilized ammonium nitrate, and the oxidizer according to the present invention is preferably blended with an oxygen-containing oxidizer, a metal oxide or a mixture thereof in addition to the phase stabilized ammonium nitrate.
- the oxygen-containing oxidizer used in the present invention can include, for example, at least one compound selected from the group consisting of alkali metal salts, alkaline earth metal salts and ammonium salts of nitric acid, perchloric acid and chloric acid and, specifically, they include potassium perchlorate, ammonium perchlorate, potassium chlorate, potassium nitrate, sodium nitrate and strontium nitrate.
- the metal oxide used in the present invention can include oxides or composite oxides of metals selected from the group consisting of copper, cobalt, iron, manganese, nickel, chromium, zinc, molybdenum and bismuth.
- the blending amount of the phase stabilized ammonium nitrate in the composition of the present invention is preferably from 60 to 85% by weight. Further, the blending amount of the oxygen-containing oxidizer, metal oxide or a mixture thereof in the composition according to the present invention is preferably from 0 to 25% by weight.
- a combustion rate accelerating catalyst is preferably blended for accelerating the combustion rate.
- the combustion rate accelerating catalyst used in the present invention can include at least one compound selected from the group consisting of powdery copper, copper compounds, iron compounds, nickel compounds and chromium compounds.
- the copper compound used in the present invention can include, for example, copper oxide and copper chromite
- the iron compound can include, for example, iron oxide, ferrocene and a derivative thereof
- the nickel compound can include, for example, nickel oxide and tire chromium compound can include, for example, chromium oxide, ammonium bichromate and potassium bichromate.
- the blending amount of the combustion rate accelerating catalyst in the composition according to the present invention is preferably 10% by weight or less.
- the combustion rate of the composition can be selected properly within a wide range by blending the oxygen-containing oxidizer, the metal oxide or the combustion rate accelerating catalyst as described above. Further, the shape, the grain size and the like of the oxidizer or the catalyst can be selected properly.
- the gas generating composition according to the present invention can comprise an organic or inorganic binder by 20% by weight or less for forming and maintaining a molding product.
- a powdery mixture can be molded into a molding product by the addition of such organic or inorganic binder.
- organic or inorganic binder can include organic binders such as sodium salt of carboxymethyl cellulose, cellulose acetate, starch, polyvinyl alcohol and sodium polyacrylate, and inorganic binders such as sodium silicate, bentonite, glass fiber and silicon rubber.
- the amount of the binder used is preferably 20% by weight or less since use of an excessive amount deteriorates the performance of the gas generating agent. Further, it has been well-known that combustion behavior of the gas generating agent essentially undergoes the effect of a geometrical structure of a molding product in combustion, and the gas generating composition of the present invention may be molded into an optimal geometrical structure depending on the composition selected, with no particular restriction.
- a solution prepared by dissolving a mixture of 90% of ammonium nitrate (AN) and 10% of potassium perchlorate (KClO 4 ) under stirring into a sufficient amount of distilled water was put in a heat drier at about 85°C (preferably under reduced pressure) to evaporate water. After evaporation of most of water, formed solids were distributed thinly on a stainless steel tray and dried thoroughly at about 85°C. Drying products were collected and ground in a mortar so as to pass a 300 ⁇ m sieve. It was confirmed if the phase stabilized ammonium (PSAN) was formed or not and whether it was homogeneous or not by detecting thermally varying peaks and the content of ammonium nitrate of products by TG-DTA.
- PSAN phase stabilized ammonium
- the strand was coated with a non-combustible epoxy type resin.
- the combustion rate was measured under a nitrogen pressure of 70 kg/cm 2 , the strand showed a combustion rate of 7.6 mm/s.
- the composition showed a theoretical combustion temperature of 2158K and a theoretical residue (amount of metal compound formed per 100 g of composition) of 3.8 g.
- the composition showed a theoretical combustion temperature of 2151K and the theoretical amount of residues was 4.1 g.
- the composition showed a theoretical combustion temperature of 2435K and the theoretical amount of residue was 4.8 g.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Air Bags (AREA)
Abstract
A gas generating composition for use in an air bag generating a large volume of gases and forming less amount of solid and liquid particles (residues) upon burning and capable of downsizing a gas generator. A gas generating composition comprising an oxidizer comprising a mixture comprising a phase stabilized ammonium nitrate (PSAN), and nitroguanidine as essential ingredients wherein the content of nitroguanidine in the composition is 35% by weight or less.
Description
The present invention concerns a gas generating
composition for use in an air bag. More specifically, it
relates to a gas generating composition with less residues for
use in an air bag which forms an operation gas in an air bag
system mounted in traffic facilities such as automobiles and
used for protecting passengers.
At present, gas generating base agents used generally
for air bag systems include inorganic azide compounds,
particularly, sodium azide. Compositions comprising such
inorganic azide compounds have no particular problems in view
of burning characteristics and are generally put to practical
use at present. However, sodium azide essentially has various
undesired properties. For example, it is an extremely toxic
substance and, further, sodium azide readily reacts with a
heavy metal such as copper or lead to form a highly sensitive
compound tending to cause abrupt ignition or explosion.
Accordingly, a special handling is required for production,
storage and disposal of such compositions.
In order to compensate such drawbacks, so-called
non-azide gas generating agents have been proposed as
replacements for sodium azide. For example, JP-A 3-208878
discloses a composition comprising, as essential ingredients,
tetrazole, triazole or a metal salt thereof and an oxygen-containing
oxidizer such as an alkali metal nitrate. In the
composition, although the toxicity is remarkably reduced
compared with the azide type composition, the gas generating
efficiency is not so high since a great amount of solid and
liquid particles are still contained in exhaust products.
Further, a gas generating agent comprising a phase
stabilized ammonium nitrate (PSAN) and nitrogen-containing
compound such as triaminoguanidine nitrate is disclosed in the
specification of WO95/04710. Further, a gas generating agent
comprising a mixture of ammonium nitrate phase-stabilized with
7 to 20% by weight of a potassium salt and nitroguanidine is
disclosed in US-A 5,545,272 and WO96/27574. Such compositions
enable to increase the gas generating efficiency upon burning
to a high level. However, heat of combustion is rather great
and theoretical combustion temperature exceeds 2500K, and CO
and NOx gases at high concentrations are generated.
Nitrogen-containing compounds have a drawback that the
heat of combustion is greater and the combustion temperature
is higher compared with those of azide compounds in general
combustion, when using an oxidizer in a stoichiometrical amount,
that is, in an amount sufficient to form oxygen required for
burning of carbon, hydrogen and other elements in the compound.
There is a possibility that excessively high combustion
temperature generates CO and NOx gases by an amount much more
than an allowable value to a human body. Further, if a great
amount of a metal compound (for example, metal oxide) is used
in the gas generating composition, solid and liquid particles
formed discharged from a gas generator may hit directly against
a bag to possibly break the bag. Additional parts are required
for confining such particles in the gas generator, which makes
it difficult to down size the gas generator itself. That is,
it can be said that an excellent gas generating agent has
characteristics of low combustion temperature at combustion,
generating a large volume of gases and generating small amount
of solid and liquid particles. Accordingly, known gas
generating compositions described above are not yet
satisfactory for application use to air bag systems.
The present inventors have made earnest studies for
solving the foregoing problems and have accomplished the
present invention.
That is, the present invention provides a gas generating
composition which generates less residues and a great amount
of gases by combustion for inflating an air bag suitable to
various purposes including the use as a shock absorbing safety
bag for traffic facilities such as automobiles, wherein the
composition comprises an oxidizer comprising a mixture
comprising a phase stabilized ammonium nitrate (PSAN) and
nitroguanidine as essential ingredients and the content of
nitroguanidine in the composition is 35% by weight or less.
In the gas generating composition according to the
present invention, the amount of residues generated is
decreased compared with gas generating compositions disclosed
so far and the use of the gas generating composition according
to the present invention can remarkably decrease the number
and the amount of additional parts for removing residues, to
make way to the downsize of a gas generator itself.
The gas generating composition according to the present
invention suppresses the formation of solid residues as much
as possible thereby enabling to remarkably decrease the number
and the amount of additional parts compared with conventional
gas generators, by utilizing the features that ammonium nitrate
is entirely converted into non corrosive gases without forming
solid residues upon combustion and generating no corrosive
gases such as chlorine and hydrogen chloride.
In the present invention, the combustion temperature can
be lowered by about 150 to 300K and the heat of combustion can
also be reduced to some extent compared with the existent
compositions, by defining the content of nitroguanidine to 35%
by weight or less, preferably, 5 to 33% by weight in the
composition. Lowering of the combustion temperature is
advantageous for decreasing toxic CO and NOx gases. Further,
low combustion temperature and less heat of combustion are also
advantageous for reducing additional parts in a gas generator.
Table 1 shows the result of theoretical calculation for
the combustion temperature and the heat of combustion with
respect to the composition of the present invention in which
nitroguanidine is blended by 35% by weight or less and an
conventional composition.
In Table 1, PSANKP10 indicates a phase stabilized
ammonium nitrate comprising 90% by weight of ammonium nitrate
and 10% by weight of potassium perchlorate and NQ indicates
nitroguanidine.
Pure ammonium nitrate causes phase transition with about
3% volumic change when passing a temperature of 32°C. Great
volumic change of a molding product may possibly cause
occurrence of abnormal combustion or burning which is not
desirable for a gas generating agent. Accordingly, a phase
stabilized ammonium nitrate is used in the present invention.
For the phase stabilized ammonium nitrate used in the
present invention, a mixture of 98 to 70% by weight of ammonium
nitrate and 2 to 30% by weight of a phase stabilizer is preferred.
It has been known generally to stabilize the phase of ammonium
nitrate, for example, by introducing potassium cations into
crystal lattices of ammonium nitrate. In the present invention,
it is preferred to use at least one compound selected from the
group consisting of organic or inorganic potassium salts being
soluble in hot water. Phase transition of ammonium nitrate can
be prevented by blending a phase stabilizer in an amount of
2% by weight or more in the phase stabilized ammonium nitrate.
However, since an excessive blending amount of the phase
stabilizer is disadvantageous for the purpose of decreasing
solid residues, the blending amount of the phase stabilizer
in the phase stabilized ammonium nitrate is preferably about
from 2 to 30% by weight.
The organic or inorganic potassium salts being soluble
in hot water used as the phase stabilizer in the present
invention can include at least one compound selected from the
group consisting of potassium nitrate, potassium perchlorate,
potassium sulfate, potassium chloride, potassium chlorate,
potassium chromate, potassium bichromate, potassium
permanganate and potassium oxalate.
The gas generating composition according to the present
invention comprises an oxidizer comprising a mixture
comprising the phase stabilized ammonium nitrate, and the
oxidizer according to the present invention is preferably
blended with an oxygen-containing oxidizer, a metal oxide or
a mixture thereof in addition to the phase stabilized ammonium
nitrate.
The oxygen-containing oxidizer used in the present
invention can include, for example, at least one compound
selected from the group consisting of alkali metal salts,
alkaline earth metal salts and ammonium salts of nitric acid,
perchloric acid and chloric acid and, specifically, they
include potassium perchlorate, ammonium perchlorate,
potassium chlorate, potassium nitrate, sodium nitrate and
strontium nitrate.
The metal oxide used in the present invention can include
oxides or composite oxides of metals selected from the group
consisting of copper, cobalt, iron, manganese, nickel,
chromium, zinc, molybdenum and bismuth.
The blending amount of the phase stabilized ammonium
nitrate in the composition of the present invention is
preferably from 60 to 85% by weight. Further, the blending
amount of the oxygen-containing oxidizer, metal oxide or a
mixture thereof in the composition according to the present
invention is preferably from 0 to 25% by weight.
In the composition of the present invention, a combustion
rate accelerating catalyst is preferably blended for
accelerating the combustion rate. The combustion rate
accelerating catalyst used in the present invention can include
at least one compound selected from the group consisting of
powdery copper, copper compounds, iron compounds, nickel
compounds and chromium compounds. The copper compound used in
the present invention can include, for example, copper oxide
and copper chromite, the iron compound can include, for example,
iron oxide, ferrocene and a derivative thereof, the nickel
compound can include, for example, nickel oxide and tire
chromium compound can include, for example, chromium oxide,
ammonium bichromate and potassium bichromate. The blending
amount of the combustion rate accelerating catalyst in the
composition according to the present invention is preferably
10% by weight or less.
In the present invention, the combustion rate of the
composition can be selected properly within a wide range by
blending the oxygen-containing oxidizer, the metal oxide or
the combustion rate accelerating catalyst as described above.
Further, the shape, the grain size and the like of the oxidizer
or the catalyst can be selected properly.
The gas generating composition according to the present
invention can comprise an organic or inorganic binder by 20%
by weight or less for forming and maintaining a molding product.
A powdery mixture can be molded into a molding product by the
addition of such organic or inorganic binder. There is no
particular restriction for the kind of the binder and usual
organic or inorganic binders can be used within a range not
deteriorating the performance of the gas generating agent.
Specific examples of the organic or inorganic binder can
include organic binders such as sodium salt of carboxymethyl
cellulose, cellulose acetate, starch, polyvinyl alcohol and
sodium polyacrylate, and inorganic binders such as sodium
silicate, bentonite, glass fiber and silicon rubber. The
amount of the binder used is preferably 20% by weight or less
since use of an excessive amount deteriorates the performance
of the gas generating agent. Further, it has been well-known
that combustion behavior of the gas generating agent
essentially undergoes the effect of a geometrical structure
of a molding product in combustion, and the gas generating
composition of the present invention may be molded into an
optimal geometrical structure depending on the composition
selected, with no particular restriction.
The present invention is to be explained specifically
with reference to examples and comparative examples, but the
present invention is not restricted only to such examples.
In the example "%" is on the weight basis unless otherwise
specified.
A solution prepared by dissolving a mixture of 90% of
ammonium nitrate (AN) and 10% of potassium perchlorate (KClO4)
under stirring into a sufficient amount of distilled water was
put in a heat drier at about 85°C (preferably under reduced
pressure) to evaporate water. After evaporation of most of
water, formed solids were distributed thinly on a stainless
steel tray and dried thoroughly at about 85°C. Drying products
were collected and ground in a mortar so as to pass a 300 µm
sieve. It was confirmed if the phase stabilized ammonium
(PSAN) was formed or not and whether it was homogeneous or not
by detecting thermally varying peaks and the content of
ammonium nitrate of products by TG-DTA. As a result of TG-DTA
analysis for the phase stabilized ammonium nitrate thus
obtained (hereinafter simply referred to as PSANKP10, AN/KClO4
(weight ratio) = 90/10), a peak at about 53°C characteristic
to DTA of usual ammonium nitrate containing products
disappeared and a new peak appeared at a position for 113°C.
As a result of TG analysis, the ammonium nitrate content was
90%.
A powder of a composition formed by blending 70% of
PSANKP10 (AN/KClO4 = 90/10) obtained in Synthesis Example 1 and
30% of nitroguanidine was thoroughly mixed in a dry process,
and a powdery product was compression molded into a strand of
about 12.7 mm height and about 10 mm diameter by a oil pressure
cylinder at a pressure of 100 kg/cm2. The strand was coated
with a non-combustible epoxy type resin. When the combustion
rate was measured under a nitrogen pressure of 70 kg/cm2, the
strand showed a combustion rate of 7.6 mm/s. The composition
showed a theoretical combustion temperature of 2158K and a
theoretical residue (amount of metal compound formed per 100
g of composition) of 3.8 g.
A composition formed by blending 69.5% of PSANKP10
obtained in Synthesis Example 1, 30% of nitroguanidine and 0.5%
of copper oxide was thoroughly mixed in a dry process, and a
strand was prepared in the same manner as in Example 1. The
combustion rate of the strand measured under a nitrogen
pressure of 70 kg/cm2 was 11.5 mm/s. The composition showed
a theoretical combustion temperature of 2151K and the
theoretical amount of residues was 4.1 g.
A composition formed by blending 64% of PSANKP10, 30%
of nitroguanidine, 5.0% of sodium salt of carboxymethyl
cellulose and 1.0% of copper oxide was thoroughly mixed in a
dry process, and a strand was prepared in the same manner as
in Example 1. The combustion rate of the strand measured under
a nitrogen pressure of 70 kg/cm2 was 11.3 mm/s. The composition
showed a theoretical combustion temperature of 2435K and the
theoretical amount of residue was 4.8 g.
Claims (10)
- A gas generating composition comprising an oxidizer comprising a mixture comprising a phase stabilized ammonium nitrate (PSAN), and nitroguanidine as essential ingredients, wherein the content of nitroguanidine of the composition is 35% by weight or less.
- A gas generating composition as defined in claim 1, wherein the phase stabilized ammonium nitrate (PSAN) comprises a mixture of 98 to 70% by weight of ammonium nitrate and 2 to 30% by weight of a phase stabilizer.
- A gas generating composition as defined in claim 2, wherein the phase stabilizer is at least one compound selected from the group consisting of organic or inorganic potassium salts being soluble in hot water.
- A gas generating composition as defined in claim 3, wherein the organic or inorganic potassium salt being soluble in hot water is at least one compound selected from the group consisting of potassium nitrate, potassium perchlorate, potassium sulfate, potassium chloride, potassium chlorate, potassium chromate, potassium dichromate, potassium permanganate and potassium oxalate.
- A gas generating composition as defined in claim 1, wherein the oxidizer comprises a phase stabilized ammonium nitrate (PSAN), and an oxygen-containing oxidizer, a metal oxide or a mixture thereof.
- A gas generating composition as defined in claim 5, wherein the oxygen-containing oxidizer is at least one compound selected from the group consisting of alkali metal salts, alkaline earth metal salts and ammonium salts of nitric acid, perchloric acid and chloric acid.
- A gas generating composition as defined in claim 5 or 6, wherein the metal oxide comprises an oxide or a composite oxide of a metal selected from the group consisting of copper, cobalt, iron, manganese, nickel, chromium, zinc, molybdenum and bismuth.
- A gas generating composition as defined in claim 1, further comprising a combustion rate accelerating catalyst by 10% by weight or less.
- A gas generating composition as defined in claim 8, wherein the combustion rate accelerating catalyst is at least one compound selected from the group consisting of powdery copper, copper compound, iron compound, nickel compound and chromium compound.
- A gas generating composition as defined in claim 1 further comprising an organic or inorganic binder by 20% by weight or less.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6768797 | 1997-03-21 | ||
| JP06768797A JP3641343B2 (en) | 1997-03-21 | 1997-03-21 | Gas generator composition for low residue airbag |
| PCT/JP1998/001125 WO1998042641A1 (en) | 1997-03-21 | 1998-03-17 | Air bag gas-generating composition with only a small amount of residue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1036781A1 true EP1036781A1 (en) | 2000-09-20 |
| EP1036781A4 EP1036781A4 (en) | 2000-09-20 |
Family
ID=13352159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98907271A Withdrawn EP1036781A4 (en) | 1997-03-21 | 1998-03-17 | GAS GENERATING COMPOSITION FOR AN AIRBAG WITH ONLY LOW RESIDUE AMOUNT |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1036781A4 (en) |
| JP (1) | JP3641343B2 (en) |
| KR (1) | KR20000076253A (en) |
| CN (1) | CN1250429A (en) |
| TW (1) | TW495496B (en) |
| WO (1) | WO1998042641A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0915813A4 (en) * | 1996-07-29 | 2003-04-02 | Automotive Systems Lab | Thermally stable nonazide automotive airbag propellants |
| EP2399884A3 (en) * | 2000-10-10 | 2012-01-18 | Nippon Kayaku Kabushiki Kaisha | Gas-generating agent composition and gas generator employing the same |
| CN113087582A (en) * | 2021-03-31 | 2021-07-09 | 陕西庆华汽车安全系统有限公司 | Production method of nitroguanidine-containing gas production medicine for safety airbag |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6872265B2 (en) * | 2003-01-30 | 2005-03-29 | Autoliv Asp, Inc. | Phase-stabilized ammonium nitrate |
| JP5031255B2 (en) * | 2006-03-02 | 2012-09-19 | 株式会社ダイセル | Gas generant composition |
| JP2009137820A (en) | 2007-12-11 | 2009-06-25 | Daicel Chem Ind Ltd | Gel transfer powder for inflator |
| CN102584504A (en) * | 2012-01-16 | 2012-07-18 | 南京理工大学 | Smokeless type firework shell opening ammunition capable of improving ignition capacity and preparation method for opening ammunition |
| CN106478323A (en) * | 2016-10-21 | 2017-03-08 | 重庆大学 | Automatically controlled solid propellant of a kind of high-performance and preparation method thereof |
| CN111517899B (en) * | 2020-06-28 | 2021-10-01 | 上海集瀛汽车安全技术有限公司 | Gas generating agent for high-burning-rate micro gas generator and preparation method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE884170C (en) * | 1946-11-08 | 1953-07-23 | Ici Ltd | Gas Generating Charge |
| CZ291570B6 (en) * | 1991-06-21 | 2003-04-16 | Dynamit Nobel Aktiengesellschaft | Propellant for gas generators, process of its preparation and use |
| FR2692257B1 (en) * | 1992-06-12 | 1995-05-05 | Divbag Snc | Pyrotechnic composition generating non-toxic hot gases and its use in a device for protecting the occupants of a motor vehicle. |
| AU687895B2 (en) * | 1993-10-06 | 1998-03-05 | Nigu Chemie Gmbh | Gas developing agent |
| DE4411654C2 (en) * | 1993-10-20 | 1996-04-04 | Temic Bayern Chem Airbag Gmbh | Gas generating mixture |
| FR2713632B1 (en) * | 1993-12-07 | 1996-01-12 | Poudres & Explosifs Ste Nale | Pyrotechnic compositions generating clean and non-toxic gases, containing a thermoplastic elastomer binder. |
| GB9503066D0 (en) * | 1995-02-16 | 1995-04-05 | Royal Ordnance Plc | Gas generating composition |
| US5641938A (en) * | 1995-03-03 | 1997-06-24 | Primex Technologies, Inc. | Thermally stable gas generating composition |
| US5545272A (en) * | 1995-03-03 | 1996-08-13 | Olin Corporation | Thermally stable gas generating composition |
| US6306232B1 (en) * | 1996-07-29 | 2001-10-23 | Automotive Systems Laboratory, Inc. | Thermally stable nonazide automotive airbag propellants |
-
1997
- 1997-03-21 JP JP06768797A patent/JP3641343B2/en not_active Expired - Fee Related
-
1998
- 1998-03-17 WO PCT/JP1998/001125 patent/WO1998042641A1/en not_active Application Discontinuation
- 1998-03-17 CN CN98803367A patent/CN1250429A/en active Pending
- 1998-03-17 KR KR1019997008348A patent/KR20000076253A/en not_active Withdrawn
- 1998-03-17 EP EP98907271A patent/EP1036781A4/en not_active Withdrawn
- 1998-03-20 TW TW087104180A patent/TW495496B/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0915813A4 (en) * | 1996-07-29 | 2003-04-02 | Automotive Systems Lab | Thermally stable nonazide automotive airbag propellants |
| EP2399884A3 (en) * | 2000-10-10 | 2012-01-18 | Nippon Kayaku Kabushiki Kaisha | Gas-generating agent composition and gas generator employing the same |
| CN113087582A (en) * | 2021-03-31 | 2021-07-09 | 陕西庆华汽车安全系统有限公司 | Production method of nitroguanidine-containing gas production medicine for safety airbag |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3641343B2 (en) | 2005-04-20 |
| WO1998042641A1 (en) | 1998-10-01 |
| EP1036781A4 (en) | 2000-09-20 |
| JPH10259085A (en) | 1998-09-29 |
| TW495496B (en) | 2002-07-21 |
| CN1250429A (en) | 2000-04-12 |
| KR20000076253A (en) | 2000-12-26 |
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