US20090260730A1 - Gas generant composition for gas actuator for activating safety device and gas generator for gas actuator using the same - Google Patents

Gas generant composition for gas actuator for activating safety device and gas generator for gas actuator using the same Download PDF

Info

Publication number: US20090260730A1
Authority: US; United States
Prior art keywords: gas; gas generant; generant composition; iron oxide; composition according
Prior art date: 2006-05-02
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.): Abandoned

Application number

US12/299,187

Other languages

English (en)

Inventor

Ryoi Kodama

Nanao Horiishi

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Nippon Kayaku Co Ltd

Toda Kogyo Corp

Original Assignee

Nippon Kayaku Co Ltd

Toda Kogyo Corp

Priority date (The priority date 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 date listed.)

2006-05-02

Filing date

2007-04-27

Publication date

2009-10-22

2007-04-27 Application filed by Nippon Kayaku Co Ltd, Toda Kogyo Corp filed Critical Nippon Kayaku Co Ltd

2008-11-04 Assigned to NIPPON KAYAKU KABUSHIKI KAISHA, TODA KOGYO CORP. reassignment NIPPON KAYAKU KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KODAMA, RYOI, HORIISHI, NANAO

2009-10-22 Publication of US20090260730A1 publication Critical patent/US20090260730A1/en

Status Abandoned legal-status Critical Current

Links

239000000203 mixture Substances 0.000 title claims abstract description 91
230000003213 activating effect Effects 0.000 title claims abstract description 11
239000007789 gas Substances 0.000 claims abstract description 207
UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 98
229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 19
229910001960 metal nitrate Inorganic materials 0.000 claims abstract description 18
-1 nitrogen-containing organic compound Chemical class 0.000 claims abstract description 18
VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 claims abstract description 18
VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 claims abstract description 18
239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 17
235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 17
239000002492 water-soluble polymer binding agent Substances 0.000 claims abstract description 17
IDCPFAYURAQKDZ-UHFFFAOYSA-N 1-nitroguanidine Chemical compound NC(=N)N[N+]([O-])=O IDCPFAYURAQKDZ-UHFFFAOYSA-N 0.000 claims abstract description 14
GDDNTTHUKVNJRA-UHFFFAOYSA-N 3-bromo-3,3-difluoroprop-1-ene Chemical compound FC(F)(Br)C=C GDDNTTHUKVNJRA-UHFFFAOYSA-N 0.000 claims abstract description 14
229920002401 polyacrylamide Polymers 0.000 claims abstract description 14
239000000126 substance Substances 0.000 claims abstract description 14
239000000696 magnetic material Substances 0.000 claims abstract description 9
229910052751 metal Inorganic materials 0.000 claims abstract description 6
239000002184 metal Substances 0.000 claims abstract description 6
150000003839 salts Chemical class 0.000 claims abstract description 6
ULRPISSMEBPJLN-UHFFFAOYSA-N 2h-tetrazol-5-amine Chemical compound NC1=NN=NN1 ULRPISSMEBPJLN-UHFFFAOYSA-N 0.000 claims abstract description 5
YTNLBRCAVHCUPD-UHFFFAOYSA-N 5-(1$l^{2},2,3,4-tetrazol-5-yl)-1$l^{2},2,3,4-tetrazole Chemical compound [N]1N=NN=C1C1=NN=N[N]1 YTNLBRCAVHCUPD-UHFFFAOYSA-N 0.000 claims abstract description 5
229910052783 alkali metal Inorganic materials 0.000 claims abstract description 5
150000001340 alkali metals Chemical class 0.000 claims abstract description 5
229910052784 alkaline earth metal Inorganic materials 0.000 claims abstract description 5
150000001342 alkaline earth metals Chemical class 0.000 claims abstract description 5
AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 claims abstract description 5
NDEMNVPZDAFUKN-UHFFFAOYSA-N guanidine;nitric acid Chemical compound NC(N)=N.O[N+]([O-])=O.O[N+]([O-])=O NDEMNVPZDAFUKN-UHFFFAOYSA-N 0.000 claims abstract description 5
229910001487 potassium perchlorate Inorganic materials 0.000 claims abstract description 5
239000013078 crystal Substances 0.000 claims abstract description 4
229910052596 spinel Inorganic materials 0.000 claims abstract description 4
239000011029 spinel Substances 0.000 claims abstract description 4
UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract 3
229910044991 metal oxide Inorganic materials 0.000 claims description 14
150000004706 metal oxides Chemical class 0.000 claims description 14
239000000843 powder Substances 0.000 claims description 8
230000005389 magnetism Effects 0.000 claims description 7
229910003145 α-Fe2O3 Inorganic materials 0.000 claims description 5
BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 claims description 4
KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 claims description 4
AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 3
GEYXPJBPASPPLI-UHFFFAOYSA-N manganese(III) oxide Inorganic materials O=[Mn]O[Mn]=O GEYXPJBPASPPLI-UHFFFAOYSA-N 0.000 claims description 3
238000002485 combustion reaction Methods 0.000 abstract description 45
DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 description 22
238000013329 compounding Methods 0.000 description 15
HSHXDCVZWHOWCS-UHFFFAOYSA-N N'-hexadecylthiophene-2-carbohydrazide Chemical compound CCCCCCCCCCCCCCCCNNC(=O)c1cccs1 HSHXDCVZWHOWCS-UHFFFAOYSA-N 0.000 description 14
230000000052 comparative effect Effects 0.000 description 14
230000000694 effects Effects 0.000 description 12
QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 10
JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 9
238000000034 method Methods 0.000 description 9
238000003860 storage Methods 0.000 description 7
229910002596 FexO Inorganic materials 0.000 description 6
239000000020 Nitrocellulose Substances 0.000 description 6
230000003197 catalytic effect Effects 0.000 description 6
238000011049 filling Methods 0.000 description 6
229920001220 nitrocellulos Polymers 0.000 description 6
230000001603 reducing effect Effects 0.000 description 6
230000008569 process Effects 0.000 description 5
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
239000001301 oxygen Substances 0.000 description 4
229910052760 oxygen Inorganic materials 0.000 description 4
FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 4
239000003380 propellant Substances 0.000 description 4
VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 4
RAESLDWEUUSRLO-UHFFFAOYSA-O aminoazanium;nitrate Chemical compound [NH3+]N.[O-][N+]([O-])=O RAESLDWEUUSRLO-UHFFFAOYSA-O 0.000 description 3
239000011230 binding agent Substances 0.000 description 3
230000007423 decrease Effects 0.000 description 3
239000007800 oxidant agent Substances 0.000 description 3
230000009257 reactivity Effects 0.000 description 3
150000003536 tetrazoles Chemical class 0.000 description 3
229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
TZRXHJWUDPFEEY-UHFFFAOYSA-N Pentaerythritol Tetranitrate Chemical compound [O-][N+](=O)OCC(CO[N+]([O-])=O)(CO[N+]([O-])=O)CO[N+]([O-])=O TZRXHJWUDPFEEY-UHFFFAOYSA-N 0.000 description 2
238000010521 absorption reaction Methods 0.000 description 2
XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical class NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 2
IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 2
125000004432 carbon atom Chemical group C* 0.000 description 2
XEVRDFDBXJMZFG-UHFFFAOYSA-N carbonyl dihydrazine Chemical compound NNC(=O)NN XEVRDFDBXJMZFG-UHFFFAOYSA-N 0.000 description 2
150000002148 esters Chemical class 0.000 description 2
150000002357 guanidines Chemical class 0.000 description 2
230000006872 improvement Effects 0.000 description 2
229910052742 iron Inorganic materials 0.000 description 2
YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
UAGLZAPCOXRKPH-UHFFFAOYSA-N nitric acid;1,2,3-triaminoguanidine Chemical compound O[N+]([O-])=O.NNC(NN)=NN UAGLZAPCOXRKPH-UHFFFAOYSA-N 0.000 description 2
229910052757 nitrogen Inorganic materials 0.000 description 2
235000010333 potassium nitrate Nutrition 0.000 description 2
239000004323 potassium nitrate Substances 0.000 description 2
230000035939 shock Effects 0.000 description 2
235000010344 sodium nitrate Nutrition 0.000 description 2
239000004317 sodium nitrate Substances 0.000 description 2
MDTUWBLTRPRXBX-UHFFFAOYSA-N 1,2,4-triazol-3-one Chemical compound O=C1N=CN=N1 MDTUWBLTRPRXBX-UHFFFAOYSA-N 0.000 description 1
BAKYASSDAXQKKY-UHFFFAOYSA-N 4-Hydroxy-3-methylbenzaldehyde Chemical compound CC1=CC(C=O)=CC=C1O BAKYASSDAXQKKY-UHFFFAOYSA-N 0.000 description 1
MTAYYBKXNAEQOK-UHFFFAOYSA-N 5-(2h-tetrazol-5-yl)-2h-tetrazole Chemical compound N1N=NC(C2=NNN=N2)=N1 MTAYYBKXNAEQOK-UHFFFAOYSA-N 0.000 description 1
239000004156 Azodicarbonamide Substances 0.000 description 1
238000004438 BET method Methods 0.000 description 1
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
239000005751 Copper oxide Substances 0.000 description 1
229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
229910002651 NO3 Inorganic materials 0.000 description 1
NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
239000000026 Pentaerythritol tetranitrate Substances 0.000 description 1
239000004372 Polyvinyl alcohol Substances 0.000 description 1
HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
230000009471 action Effects 0.000 description 1
239000000654 additive Substances 0.000 description 1
150000001412 amines Chemical class 0.000 description 1
ZKTARFAXHMRZEF-UHFFFAOYSA-N azane;5-(2h-tetrazol-5-yl)-2h-tetrazole Chemical compound N.N.N1N=NC(C2=NNN=N2)=N1 ZKTARFAXHMRZEF-UHFFFAOYSA-N 0.000 description 1
235000019399 azodicarbonamide Nutrition 0.000 description 1
239000002585 base Substances 0.000 description 1
OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
238000007664 blowing Methods 0.000 description 1
239000001768 carboxy methyl cellulose Substances 0.000 description 1
235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
239000008112 carboxymethyl-cellulose Substances 0.000 description 1
239000003054 catalyst Substances 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
229910017052 cobalt Inorganic materials 0.000 description 1
239000010941 cobalt Substances 0.000 description 1
GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
239000000567 combustion gas Substances 0.000 description 1
238000011109 contamination Methods 0.000 description 1
239000010949 copper Substances 0.000 description 1
229910052802 copper Inorganic materials 0.000 description 1
229910000431 copper oxide Inorganic materials 0.000 description 1
230000008878 coupling Effects 0.000 description 1
238000010168 coupling process Methods 0.000 description 1
238000005859 coupling reaction Methods 0.000 description 1
QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
230000007613 environmental effect Effects 0.000 description 1
SWRGUMCEJHQWEE-UHFFFAOYSA-N ethanedihydrazide Chemical compound NNC(=O)C(=O)NN SWRGUMCEJHQWEE-UHFFFAOYSA-N 0.000 description 1
238000001125 extrusion Methods 0.000 description 1
239000012634 fragment Substances 0.000 description 1
239000000446 fuel Substances 0.000 description 1
150000002429 hydrazines Chemical class 0.000 description 1
235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
238000011068 loading method Methods 0.000 description 1
239000011777 magnesium Substances 0.000 description 1
229910052749 magnesium Inorganic materials 0.000 description 1
238000004519 manufacturing process Methods 0.000 description 1
238000005259 measurement Methods 0.000 description 1
238000002156 mixing Methods 0.000 description 1
238000012986 modification Methods 0.000 description 1
230000004048 modification Effects 0.000 description 1
HURPOIVZCDCEEE-UHFFFAOYSA-N n-(2h-tetrazol-5-yl)nitramide Chemical compound [O-][N+](=O)NC=1N=NNN=1 HURPOIVZCDCEEE-UHFFFAOYSA-N 0.000 description 1
229910052759 nickel Inorganic materials 0.000 description 1
TVIRJXQLFRFUCD-UHFFFAOYSA-N nitric acid;2h-tetrazol-5-amine Chemical compound O[N+]([O-])=O.NC1=NN=NN1 TVIRJXQLFRFUCD-UHFFFAOYSA-N 0.000 description 1
125000004433 nitrogen atom Chemical group N* 0.000 description 1
150000002894 organic compounds Chemical class 0.000 description 1
239000005416 organic matter Substances 0.000 description 1
230000001590 oxidative effect Effects 0.000 description 1
239000002245 particle Substances 0.000 description 1
229960004321 pentaerithrityl tetranitrate Drugs 0.000 description 1
229920002451 polyvinyl alcohol Polymers 0.000 description 1
229910052708 sodium Inorganic materials 0.000 description 1
239000011734 sodium Substances 0.000 description 1
BAZAXWOYCMUHIX-UHFFFAOYSA-M sodium perchlorate Chemical compound [Na+].[O-]Cl(=O)(=O)=O BAZAXWOYCMUHIX-UHFFFAOYSA-M 0.000 description 1
229910001488 sodium perchlorate Inorganic materials 0.000 description 1
159000000000 sodium salts Chemical class 0.000 description 1
238000001179 sorption measurement Methods 0.000 description 1
239000000758 substrate Substances 0.000 description 1
125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
150000003852 triazoles Chemical class 0.000 description 1
125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 description 1
LZLKDWBQTGTOQY-UHFFFAOYSA-N trinitramide Inorganic materials O=N(=O)N(N(=O)=O)N(=O)=O LZLKDWBQTGTOQY-UHFFFAOYSA-N 0.000 description 1
229920002554 vinyl polymer Polymers 0.000 description 1
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
238000004804 winding Methods 0.000 description 1
229910052725 zinc Inorganic materials 0.000 description 1
239000011701 zinc Substances 0.000 description 1
229910000859 α-Fe Inorganic materials 0.000 description 1
229910006297 γ-Fe2O3 Inorganic materials 0.000 description 1

Images

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
- B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B23/00—Compositions characterised by non-explosive or non-thermic constituents
- C06B23/007—Ballistic modifiers, burning rate catalysts, burning rate depressing agents, e.g. for gas generating
- 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
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/04—Blasting cartridges, i.e. case and explosive for producing gas under pressure
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R2021/26029—Ignitors

Definitions

the present invention relates to a gas generant composition for generating working gas and a gas generator for a gas actuator using the same in a gas generator for a gas actuator loaded on an automobile or an aircraft and employed for human body protection.
a seat belt device and an air bag device are widespread in view of protection of the passenger of an automobile.
the seat belt device is equipped for the purpose of preventing the passenger from being thrown out into the automobile or from the automobile due to a shock caused upon vehicle collision, and restricts/fixes the passenger to the seat by winding the belt on the body of the passenger.
a seat belt device comprising a pretensioner function for improving the passenger protection function has rapidly come into wide use. Also as to the pretensioner device, the number of use thereof tends to increase not only on the driving seat but also on the passenger seat and the back seat, due to the recent improvement of safety consciousness.
This pretensioner function immediately tensions the seat belt loosened due to the thickness of clothes or the like upon collision or immediately before the collision, and improves the effect of restricting the passenger.
This pretensioner function is implemented by instantaneously moving a piston in a cylinder, for example, by combustion gas of a gas generant output from a small gas generator for a gas actuator referred to as a micro gas generator and strongly drawing the seat belt by power supplied to the pretensioner in association with this piston.
a device such as a hood lifter for reducing the degree of harm on a pedestrian is also currently being loaded on a vehicle in order to absorb a shock on the pedestrian upon collision between the vehicle and the pedestrian in view of pedestrian protection, and a small gas generator is employed for activating this device.
a propellant gas generant based on nitrocellulose is known in general (refer to Japanese Patent Laying-Open No. 49-50619 (Patent Document 1), for example).
This gas generant based on nitrocellulose has high gas generation efficiency, and is excellent in moisture absorption resistance.
Patent Document 2 discloses a non-propellant gas generant for a pretensioner device.
Patent Document 3 also discloses a non-propellant gas generant for a pretensioner device, containing nitrocellulose.
Patent Document 1 Japanese Patent Laying-Open No. 49-50619
Patent Document 2 Japanese Patent Laying-Open No. 2001-2488
Patent Document 3 Japanese Patent Laying-Open No. 2002-12492
the gas generant according to Patent Document 2 has a slow combustion speed due to employment of a binder containing a large number of carbon atoms, the content of an inorganic oxidizer for completely combusting the binder increases, there is a possibility that the amount of generated gas decreases as compared with the propellant based on nitrocellulose as a result, and the quantity of the gas generant must be increased in order to exert equivalent performance.
this gas generant uses a sodium salt such as sodium nitrate as a chlorine neutralizer, and hence such a possibility is sufficiently conceivable in a test for evaluating moisture absorption resistance (test of exposing a small gas generator under environment of a temperature of 85° C. ⁇ humidity of 85% for 1000 hours) that the gas generator absorbs moisture after the test.
the present invention has been proposed in order to solve the aforementioned problems, and an object thereof is to provide a gas generant composition for a gas actuator for activating a safety device, superior in combustibility under a low pressure as compared with the conventional art and capable of reducing the amount of CO gas generated in combustion.
the gas generant composition according to the present invention is employed for a gas actuator for activating a safety device.
the gas actuator is a device converting the pressure of gas to power, and a device employed for activating a pretensioner or a hood lifter which is an automobile safety device can be listed, for example.
the gas generant composition for a gas actuator for activating a safety device contains the respective components of (A) a nitrogen-containing organic compound, (B) metal nitrate and/or perchlorate, (C) a water-soluble polymer binder, and (D) a magnetic material.
the nitrogen-containing organic compound is at least one substance selected from nitroguanidine, guanidine nitrate, bitetrazole, azobistetrazole and 5-aminotetrazole
the metal nitrate is a metal salt selected from alkali metals and alkaline earth metals while the perchlorate is ammonium perchlorate or potassium perchlorate
the water-soluble polymer binder is a mixture of hydroxypropyl methylcellulose (HPMC) and polyacrylamide.
the magnetic material in the gas generant composition according to the present invention has a property attracted to a magnet, and is preferably magnetic iron oxide, particularly preferably magnetic iron oxide (Fe x O.Fe 2 O 3 : where 0 ⁇ x ⁇ 1) having a spinel crystal structure.
the magnetic iron oxide mentioned herein has magnetism and a redox catalytic function, dissimilarly to iron oxide (Fe 2 O 3 ) generally employed as a catalyst.
the gas generant composition according to the present invention further contains (E) a metal oxide other than the magnetic iron oxide, and more preferably, (E) the metal oxide other than the magnetic iron oxide is at least one substance selected from CuO, Cu 2 O, ZnO, ⁇ -Fe 2 O 3 , Mn 2 O 3 and Mn 3 O 4 .
the content of (A) the nitrogen-containing organic compound is 25 to 55 weight %
the content of (B) the metal nitrate and/or the perchlorate is 40 to 70 weight %
the content of (C) the water-soluble polymer binder is 2 to 10 weight %
the content of (D) the magnetic iron oxide is 1 to 5 weight %
the content of (E) the metal oxide other than the magnetic iron oxide is 1 to 5 weight %.
the magnetic iron oxide in the gas generant composition according to the present invention is a composition expressed in Fe x O.Fe 2 O 3 (0 ⁇ x ⁇ 1), and is powder having a specific surface area of 2.5 to 80 m 2 /g.
the gas generant composition according to the present invention is worked into a compact.
This compact has a property attracted to a magnet.
the gas generant composition according to the present invention is employed for a pretensioner or a hood lifter.
the present invention also provides a small gas generator for a gas actuator for activating a safety device employing the aforementioned gas generant composition according to the present invention.
this small gas generator is employed for a pretensioner or a hood lifter.
the gas generant composition having magnetism according to the present invention contains the magnetic iron oxide, and hence has a catalytic effect of accelerating combustion under a low pressure, oxidizing CO gas generated in combustion to CO 2 and reducing the CO gas concentration due to combustion catalytic performance of this magnetic iron oxide powder.
the gas generant composition having magnetism as the compact is charged into the gas generator, the same can be charged to fill up the internal space due to magnetic force, whereby such particular effects are attained that both of the combustion accelerating effect under a low pressure and the effect of reducing the concentration of the CO gas generated in combustion are further increased.
FIG. 1 is a sectional view schematically showing a gas generator 1 of a pretensioner device in a case of employing a gas generant composition according to the present invention.
FIG. 2 illustrates sectional views schematically showing a process of assembling gas generator 1 shown in FIG. 1 .
FIG. 3 is a sectional view schematically showing a gas generator for a pretensioner or a hood lifter.
the present invention provides a gas generant composition, containing respective components of (A) a nitrogen-containing organic compound, (B) metal nitrate and/or perchlorate, (C) a water-soluble polymer binder, and (D) a magnetic material.
A) a nitrogen-containing organic compound containing respective components of (A) a nitrogen-containing organic compound, (B) metal nitrate and/or perchlorate, (C) a water-soluble polymer binder, and (D) a magnetic material.
the respective components (A) to (D) contained in the gas generant composition according to the present invention are now described in detail.
the nitrogen-containing organic compound contained in the gas generant composition according to the present invention can be widely employed for the present invention without particular limitation, so far as the same is an organic compound, other than nitric ester, containing nitrogen having been employed as a fuel for gas generation in this field.
the nitrogen-containing organic compound has a structure basically suppressing generation of CO due to a high proportion of nitrogen atoms and a low proportion of carbon atoms in the molecular structure, and is easy in handling properties including thermal stability.
At least one substance selected from a triazole derivative, a tetrazole derivative, a guanidine derivative, an azodicarbonamide derivative and a hydrazine derivative can be listed, for example.
5-oxo-1,2,4-triazole, tetrazole, 5-aminotetrazole, aminotetrazole nitrate, nitroaminotetrazole, bitetrazole (5,5′-bi-1H-tetrazole), 5,5′-bi-1H-tetrazole diammonium salt, azobistetrazole, 5,5′-azotetrazole diguanidium salt, guanidine, nitroguanidine, cyanoguanidine, triaminoguanidine nitrate, guanidine nitrate, aminoguanidine nitrate, biuret, azodicarbonamide, carbohydrazide, carbohydrazide nitrate complex, oxalic acid hydrazide, hydrazine nitrate complex, amine complex and the like can be listed.
At least one substance selected from the tetrazole derivative and the guanidine derivative is preferable, and at least one substance selected from nitroguanidine, guanidine nitrate, bitetrazole, azobistetrazole and 5-aminotetrazole is particularly preferable, since the same is at a low cost, excellent in reactivity and relatively easy to handle.
the content (compounding ratio) of the nitrogen-containing organic compound in the gas generant composition according to the present invention is preferably 25 to 55 weight %, more preferably 30 to 50 weight %. If the content (compounding ratio) of the nitrogen-containing organic compound is less than 25 weight %, the number of moles of the generated gas per 100 g of the gas generant composition is reduced, and generation of NO x tends to increase due to excess oxygen. If the content (compounding ratio) of the nitrogen-containing organic compound exceeds 55 weight %, the true specific density of the gas generant composition decreases due to increase in the quantity of organic matter, the loading weight per volume decreases, and CO gas tends to generate in a large amount due to insufficiency of an oxidizer component.
the gas generant composition according to the present invention contains at least either metal nitrate or perchlorate as an oxidizer, and preferably contains both of metal nitrate and perchlorate.
a metal salt selected from alkali metals, alkaline earth metals, iron, copper, magnesium, cobalt, nickel, zinc and the like can be listed as the metal nitrate employed in the present invention
a metal salt selected from alkali metals and alkaline earth metals is preferable, in view of reactivity and handleability. More specifically, at least one substance selected from sodium nitrate, potassium nitrate, magnesium nitrate, barium nitrate, strontium nitrate and the like is illustrated as such metal nitrate. In particular, potassium nitrate or strontium nitrate is preferable.
the perchlorate is not restricted to these.
ammonium perchlorate or potassium perchlorate generating a large amount of gas and having high reactivity is particularly preferable.
the content (compounding ratio) of metal nitrate and/or perchlorate in the gas generant composition according to the present invention is preferably 40 to 70 weight %, more preferably 45 to 65 weight %. This is because CO gas tends to generate in a large amount due to insufficient oxygen if the content (compounding ratio) of metal nitrate and/or perchlorate is less than 40 weight % while generation of NO x tends to increase due to excess oxygen if the content (compounding ratio) of metal nitrate and/or perchlorate exceeds 70 weight %. If the gas generant composition according to the present invention contains both of metal nitrate and perchlorate as the (B) component, the aforementioned content denotes the ratio at which the total quantity thereof occupies the gas generant composition.
the gas generant composition according to the present invention contains a water-soluble polymer binder, in view of improving breaking strength and other mechanical properties (wear resistance, thermal form stability etc.). While a mixture of hydroxypropyl methylcellulose (HPMC) and polyacrylamide, cellulose acetate, sodium carboxylmethylcellulose, hydroxyethyl cellulose, hydroxypropyl methylcellulose, carboxymethylcellulose, guagum, polyvinyl alcohol, polyvinyl pyrolidone and the like, for example, can be listed as such water-soluble polymer binders, the water-soluble polymer binder is not restricted to these. In particular, the water-soluble polymer binder is preferably the mixture of HPMC and polyacrylamide, for the reason of extrudability and environmental resistance.
the content (compounding ratio) of the water-soluble polymer binder in the gas generant composition according to the present invention is preferably 2 to 10 weight %, more preferably 2 to 8 weight %. This is because the strength of a compact of the gas generant composition tends to lower if the content (compounding ratio) of the water-soluble polymer binder is less than 2 weight % while CO gas tends to generate in a large amount due to insufficient oxygen if the content (compounding ratio) of the water-soluble polymer binder exceeds 10 weight %.
magnetic iron oxide is preferable, and magnetic iron oxide having a spinel crystal structure is particularly preferable.
Magnetite (Fe 3 O 4 ), maghemite ( ⁇ -Fe 2 O 3 ), bertholide (Fe x O.Fe 2 O 3 ) (0 ⁇ x ⁇ 1), ferrite (MO. Fe 2 O 3 ) (M: bivalent metal) and the like, for example, can be listed as such magnetic iron oxide, and magnetite (Fe 3 O 4 ) containing a large quantity of bivalent iron having a redox function is preferable in particular. It is possible to confirm that magnetite is contained in the gas generant composition by approximating a magnet and observing presence or absence of attraction, for example.
bertholide which is an intermediate oxide expressed in Fe x O.Fe 2 O 3 (0 ⁇ x ⁇ 1) as the magnetic iron oxide in the gas generant composition according to the present invention. This is because such an effect is attained that the redox action can be controlled by employing bertholide expressed in Fe x O.Fe 2 O 3 (0 ⁇ x ⁇ 1).
this magnetic iron oxide is preferably powder having a specific surface area 2.5 to 80 m 2 /g. It is unpreferable since chemical activity is low and both of the combustion effect and the CO gas concentration reducing effect are small if the specific surface area of the said magnetic iron oxide is less than 2.5 m 2 /g, while chemical activity is so excessively high that there is an apprehension that the magnetic iron oxide becomes unstable in the atmosphere and hard to handle if the specific surface area exceeds 80 m 2 /g.
the said specific surface area is more preferably in the range of 10 to 60 m 2 /g, particularly preferably 20 to 50 m 2 /g.
the specific surface area of the aforementioned magnetic iron oxide denotes a value measured by a BET method through nitrogen adsorption, for example.
the content (compounding ratio) of the magnetic iron oxide in the gas generant composition according to the present invention is preferably 1 to 5 weight %, more preferably 2 to 4 weight %. This is because the redox catalytic effect tends to lower if the content (compounding ratio) of the magnetic iron oxide is less than 1 weight % while the ratio of the gas generant component so lowers that the gas generation efficiency tends to lower if the content (compounding ratio) of the magnetic iron oxide exceeds 5 weight %.
the gas generant composition having magnetism according to the present invention containing the aforementioned components (A) to (D) preferably contains the magnetic iron oxide as the composition, whereby the same is excellent in combustibility under a low pressure, and can reduce the amount of CO gas generated in combustion.
the gas generant composition according to the present invention having such effects can be preferably employed for a pretensioner or a hood lifter.
the wording “excellent in combustibility under a low pressure” indicates that, while a combustion speed (5%-30%) dP/dt which is a parameter indicating ignitability and combustibility under a low pressure (5 to 30 MPa) has been 0.1 to 0.3 in a conventional gas generant composition (specific example: nitroguanidine/strontium nitrate/ammonium perchlorate/binder), the combustion speed (5%-30%) dP/dt under the same pressure is 1.8 to 5.9 in the gas generant composition according to the present invention.
dP/dt denotes 5% pressure (P 5 ) at a time of setting the maximum ultimate pressure in a bomb to 100%, and assuming that t 5 represents a time from energization up to P 5 and t 30 similarly represents a time up to 30% pressure (P 30 ), the combustion speed (5%-30%) dP/dt is expressed in (P 30 -P 5 )/(t 30 -t 5 ) (combusting 1250 mg of the gas generant composition in a bomb of 27 cc with a hole of 3 mm in diameter and measuring the current internal pressure of the bomb with a pressure sensor).
the wording “can reduce the amount of CO gas generated in combustion” more specifically indicates that, while the amount of CO gas generated by a conventional gas generant composition (specific example: smokeless powder mainly composed of nitrocellulose) in combustion has been 4000 to 5000 ppm, the amount of CO gas generated by the gas generant composition according to the present invention in combustion is 200 to 300 ppm (measuring gas generated by combusting 1000 mg of the gas generant composition in a bomb of 10 cc with a hole of 1 mm in diameter in a tank of 60 L with a gas detecting tube).
a conventional gas generant composition specifically example: smokeless powder mainly composed of nitrocellulose
the amount of CO gas generated by the gas generant composition according to the present invention in combustion is 200 to 300 ppm (measuring gas generated by combusting 1000 mg of the gas generant composition in a bomb of 10 cc with a hole of 1 mm in diameter in a tank of 60 L with a gas detecting tube).
the gas generant composition according to the present invention is worked into a compact containing magnetic iron oxide to have magnetism, whereby such a particular effect is attained that chargeability can be improved by magnetic force when employed as a gas generant for a small gas generator used for a pretensioner or a hood lifter. This point is now described.
FIG. 1 is a sectional view schematically showing a small gas generator 1 for a pretensioner or a hood lifter in a case of employing the gas generant composition according to the present invention
FIG. 2 illustrates sectional views schematically showing a process of assembling gas generator 1 shown in FIG. 1
FIG. 1 shows a case of employing gas generator 1 of a lateral blowing type, for example, as the small gas generator for a pretensioner or a hood lifter.
FIG. 1 shows a case of employing gas generator 1 of a lateral blowing type, for example, as the small gas generator for a pretensioner or a hood lifter.
gas generator 1 mainly comprises an igniter 10 , a holder 20 as a base substrate holding igniter 10 , an actuating charge cup (AC cup) 40 as a cup member forming a gas generant storage chamber storing a gas generant (compact of a gas generant composition) 50 between the same and holder 20 holding igniter 10 , and a combustion control cover 30 arranged in the aforementioned gas generant storage chamber and so provided as to cover holder 20 and igniter 10 .
AC cup actuating charge cup
Combustion control cover 30 is formed by a hollow and substantially cylindrical member, and has a large-diametral portion 31 covering the upper portion of holder 20 , a small-diametral portion 32 covering a squib cup 12 of igniter 10 and a tapered portion 33 coupling large-diametral portion 31 and small-diametral portion 32 with each other.
Combustion control cover 30 performs a function of protecting squib cup 12 in non-operation, a function of preventing fragments resulting from rupture of squib cup 12 in operation from outward scattering and a function of supplying directivity to a flame formed in igniter 10 and laterally guiding the flame toward the gas generant storage chamber storing gas generant 50 .
combustion control cover 30 is mounted on the inner part of AC cup 40 molded into a desired shape, and gas generant 50 is thereafter charged into a space formed between combustion control cover 30 and AC cup 40 with a dedicated filling jig 150 in general, as shown at (a) in FIG. 2 .
gas generant 50 is charged into the aforementioned space as densely as possible by vibrating AC cup 40 or the like.
dedicated filling jig 150 is detached from AC cup 40 by pulling up dedicated filling jig 150 toward a direction of arrow G in the drawing, as shown at (b) in FIG. 2 .
holder 20 to which igniter 10 is caulked/fixed through an O-ring 61 is inserted into large-diametral portion 31 of combustion control cover 30 assembled into AC cup 40 charged with gas generant 50 , and these are set on a stage (not shown) having a receiving surface on a lower portion. Then, the caulked portion of holder 20 is bent and plastic-deformed to roll in a flange portion 43 of AC cup 40 , thereby caulking/fixing AC cup 40 to holder 20 .
Gas generator 1 having the structure shown in FIG. 1 is manufactured through this process.
this composition is worked into a compact and contains magnetic iron oxide as the component (D), whereby dedicated filling jig 150 and combustion control cover 30 may not be employed when charging the aforementioned gas generant.
the gas generator is manufactured by simply charging a constant quantity of the gas generant compact into AC cup 40 , then applying a magnet from outside AC cup 40 thereby magnetizing the gas generant to the wall surface of AC cup 40 by magnetic force and providing a space in the central portion of AC cup 40 and thereafter inserting holder 20 having igniter 10 (igniter 10 inserted into large-diametral portion 31 of combustion control cover 30 if necessary) into the space.
the steps from charging of the gas generant up to assembling of the gas generator can be simply carried out. Therefore, the gas generant can be charged up to a portion around an opening of AC cup 40 in high density as a result, and chargeability is improved as compared with a case of employing a gas generant composition containing no magnetic iron oxide. Consequently, it has been possible to further increase both of combustion efficiency and the CO gas reducing effect.
the gas generant composition according to the present invention preferably further contains a metal oxide other than magnetic iron oxide as the component (E), in view of further improving combustibility. While at least one substance selected from CuO, Cu 2 O, ZnO, ⁇ -Fe 2 O 3 , Mn 2 O 3 , Mn 3 O 4 and the like, for example, can be listed as this metal oxide other than magnetic iron oxide, the metal oxide is not restricted to these. In particular, the metal oxide is preferably at least one substance selected from CuO, Cu 2 O and ⁇ -Fe 2 O 3 , due to an excellent combustion catalytic function.
the content (compounding ratio) of this metal oxide other than magnetic iron oxide in the gas generant composition according to the present invention is preferably 1 to 5 weight %, more preferably 1 to 3 weight %. This is because the combustion catalytic effect tends to lower if the content (compounding ratio) of the aforementioned metal oxide is less than 1 weight % while the ratio of the gas generant component so lowers that the gas generation efficiency tends to lower if the content (compounding ratio) of the aforementioned metal oxide exceeds 5 weight %.
the gas generant composition according to the present invention may contain various additives (RDX (trimethylene trinitroamine), HMX (tetramethylene tetranitroamine), PETN (pentaerythritol tetranitrate), TAGN (triaminoguanidine nitrate), HN (hydrazine nitrate) etc.) in a range not hampering the effects of the present invention, as a matter of course.
RDX trimethylene trinitroamine
HMX tetramethylene tetranitroamine
PETN penentaerythritol tetranitrate
TAGN triaminoguanidine nitrate
HN hydrazine nitrate
the gas generant composition according to the present invention can be molded into a proper shape and provided as a gas generant.
the shape of the compact is not particularly limited but a pelletlike, discoidal, spherical, barlike, hollow cylindrical, confeito-like or tetrapodic shape can be listed, and the compact may be imperforate or perforated. Further, the pelletlike or discoidal compact may be provided with about one to several protrusions on a single surface or both surfaces.
the shape of the protrusions is not particularly limited, but a columnar, conical or multi-pyramidal shape, for example, can be listed.
the present invention also provides a small gas generator for a gas actuator for activating a safety device employing the aforementioned gas generant composition according to the present invention.
the small gas generator according to the present invention can be preferably implemented by that comprising pretensioner gas generator 1 shown in FIG. 1 , or a small gas generator for a pretensioner or a hood lifter shown in FIG. 3 , for example.
the said mixture was extruded in an extruder through a die of 1.5 mm in diameter with application of a prescribed pressure, to be extruded into a prescribed shape.
the extruded compact of the gas generant composition was cut to a length of 2.0 mm, and dried to obtain a columnar gas generant composition.
a combustion speed (5%-30%) dP/dt and CO concentration which are parameters showing ignitability and combustibility of the obtained gas generant composition were measured.
1250 mg of the gas generant composition was combusted in a bomb of 27 cc with a hole of 3 mm in diameter for measuring the current internal pressure of the bomb with a pressure sensor and obtaining the relation between the combustion time and the combustion pressure.
the CO concentration measurement 1000 mg of the gas generant composition was combusted in a bomb of 10 cc with a hole of 1 mm in diameter in a tank of 60 L, and generated gas in 60 L was collected after 5 minutes from energization.
the collected gas was measured with a Kitagawa gas detecting tube.
a permanent magnet coercive force Hc: 2.5 kOe to 4.0 kOe
Hc coercive force
gas generant compositions were manufactured by a method similar to that in Example 1, and the respective characteristics were evaluated by the same methods as Example 1.
comparative example 4 commercially available smokeless powder was used and the characteristics were evaluated by the same methods as Example 1.
Table 2 Table 3 and Table 4 show results as to Example 2, Example 3 and Example 4 respectively. Further, Table 5, Table 6, Table 7 and Table 8 show results as to comparative example 1, comparative example 2, comparative example 3 and comparative example 4 respectively.
Examples 1 and 2 can be compared with comparative examples 1 and 2, and show that the combustion speed (5%-30%) dP/dt can be increased and the amount of CO gas can be reduced by containing magnetic iron oxide.
Examples 3 and 4 can be compared with comparative example 3, and show that copper oxide which is a metal oxide can increase the combustion speed (5%-30%) dP/dt while CO gas exhibits a slightly high value of 550 ppm, and the combustion speed (5%-30%) dP/dt can be further increased and the amount of CO gas can be reduced by further adding magnetic iron oxide.
comparative example 4 smokeless powder which is the conventional art, shows that a large amount of CO gas is generated although the combustion speed (5%-30%) dP/dt is high.
Examples 1 to 4 containing at least 1 weight % of magnetic iron oxide exhibited characteristics attracted to magnets as compared with comparative examples.

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Chemical Kinetics & Catalysis (AREA)
Combustion & Propulsion (AREA)
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Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
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US12/299,187 2006-05-02 2007-04-27 Gas generant composition for gas actuator for activating safety device and gas generator for gas actuator using the same Abandoned US20090260730A1 (en)

Applications Claiming Priority (3)

Application Number	Priority Date	Filing Date	Title
JP2006128539A JP5277428B2 (ja)	2006-05-02	2006-05-02	安全部品を作動させるためのガスアクチュエータ用ガス発生剤組成物およびそれを用いたガスアクチュエータ用ガス発生器
JP2006-128539		2006-05-02
PCT/JP2007/059196 WO2007129611A1 (ja)	2006-05-02	2007-04-27	安全部品を作動させるためのガスアクチュエータ用ガス発生剤組成物およびそれを用いたガスアクチュエータ用ガス発生器

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US (1)	US20090260730A1 (de)
EP (1)	EP2014632A4 (de)
JP (1)	JP5277428B2 (de)
CN (1)	CN101432245A (de)
WO (1)	WO2007129611A1 (de)

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WO2015161006A1 (en) *	2014-04-15	2015-10-22	Tk Holdings, Inc.	Silicone propelled pedestrian hood lifter and seatbelt pre-tensioner
EP3770136A1 (de) *	2019-07-25	2021-01-27	ArianeGroup SAS	Festes verbund-treibmittel
DE102010033417B4 (de)	2010-08-04	2023-12-28	Zf Airbag Germany Gmbh	Anzündereinheit mit Kunststoffumspritzung
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CN107892638A (zh) *	2017-05-04	2018-04-10	湖北航天化学技术研究所	一种产气药剂
KR101884124B1 (ko)	2017-05-26	2018-08-29	국방과학연구소	에너지 복합체 및 이의 제조방법
CN110236244A (zh) *	2019-06-24	2019-09-17	高磊	用于防止老人摔伤的可充气式裤子
JP7527102B2 (ja) *	2019-08-20	2024-08-02	株式会社ダイセル	ガス発生器の組立方法
CN112979395B (zh) *	2021-04-12	2022-08-26	中北大学	一种气体发生剂及其制备方法
JP2025145851A (ja) *	2024-03-22	2025-10-03	日本化薬株式会社	プリテンショナー用ガス発生装置

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US9926949B2 (en)	2014-04-15	2018-03-27	Tk Holdings Inc.	Silicone propelled pedestrian hood lifter and seatbelt pre-tensioner
EP3770136A1 (de) *	2019-07-25	2021-01-27	ArianeGroup SAS	Festes verbund-treibmittel
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Also Published As

Publication number	Publication date
JP2007297252A (ja)	2007-11-15
CN101432245A (zh)	2009-05-13
EP2014632A1 (de)	2009-01-14
JP5277428B2 (ja)	2013-08-28
EP2014632A4 (de)	2011-04-27
WO2007129611A1 (ja)	2007-11-15

Legal Events

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2008-11-04

AS

Assignment

Owner name: NIPPON KAYAKU KABUSHIKI KAISHA, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KODAMA, RYOI;HORIISHI, NANAO;REEL/FRAME:021783/0175;SIGNING DATES FROM 20081008 TO 20081020

Owner name: TODA KOGYO CORP., JAPAN