EP0691317B1 - Compositions génératrices de gaz exempt d'azoture - Google Patents

Compositions génératrices de gaz exempt d'azoture Download PDF

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Publication number
EP0691317B1
EP0691317B1 EP95108938A EP95108938A EP0691317B1 EP 0691317 B1 EP0691317 B1 EP 0691317B1 EP 95108938 A EP95108938 A EP 95108938A EP 95108938 A EP95108938 A EP 95108938A EP 0691317 B1 EP0691317 B1 EP 0691317B1
Authority
EP
European Patent Office
Prior art keywords
gas
weight
mixture
substance mixture
fumaric acid
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.)
Expired - Lifetime
Application number
EP95108938A
Other languages
German (de)
English (en)
Other versions
EP0691317A2 (fr
EP0691317A3 (fr
Inventor
Armin Dr. Stark
Siegfried Dr. Zeuner
Karl-Heinz Rödig
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.)
ZF Airbag Germany GmbH
Original Assignee
TRW Airbag Systems GmbH
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.)
Filing date
Publication date
Application filed by TRW Airbag Systems GmbH filed Critical TRW Airbag Systems GmbH
Publication of EP0691317A2 publication Critical patent/EP0691317A2/fr
Publication of EP0691317A3 publication Critical patent/EP0691317A3/fr
Application granted granted Critical
Publication of EP0691317B1 publication Critical patent/EP0691317B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C06D5/06—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids

Definitions

  • the invention relates to a gas-generating mixture of substances, in particular for the production of propellant gas for occupant protection devices in motor vehicles, in particular for airbag systems.
  • Passive safety devices for motor vehicles such as airbag systems
  • airbag systems are used in In the event of a collision of the vehicle, the vehicle occupants protect from injury.
  • a Gas generator in a combustion chamber Mixture of substances in the form of tablets, pellets or granules, a propellant after electrical activation generated, which in turn inflates an airbag, thereby avoiding that the vehicle occupant, for example on the windshield, the steering wheel or the dashboard opens.
  • gas-generating compositions which consist of a Alkali metal azide and a metal oxide, usually iron oxide, exist (see. DE-OS 24 59 667). These well-known However, mixtures of substances have a slow burning rate and a bad willingness to ignite.
  • DE-OS 43 17 727 is a mixture of substances known from nitrocellulose and nitroglycerin.
  • Such Fuel mixtures based on nitrocellulose have poor temperature stability with which Consequence of a limited lifespan and the impossibility to recycle this fabric.
  • these fuel mixtures of heavy metal salts as combustion controllers, which also complicates disposal.
  • the biggest disadvantage, on the other hand, is that which arises during burning enormous amounts of carbon monoxide.
  • US 3 880 595 discloses Mixtures of substances based on a nitrogen-free organic Compound, such as citric acid based.
  • a nitrogen-free organic Compound such as citric acid based.
  • the disadvantage of these fuels is that of them low thermal stability and their high hygroscopicity as well as poor workability, especially the only with great difficulty compression to be carried out to tablets or pellets.
  • the U.S. Patent 3,862,866 is considered the closest prior art viewed. It discloses a gas-generating mixture of substances, in particular to generate propellant gas for occupant protection devices in Motor vehicles, which essentially consist of a carbon, hydrogen and oxygen-containing organic compound such as Sucrose, starch, cellulose, ascorbic acid or oxalic acid, and an inorganic oxidizer from the group of perchlorates or chlorates.
  • the mixture of substances contains approx. Part of the organic Compound, three parts of the inorganic oxidizer and one to four parts of metal carbonate as a coolant.
  • the invention is based on the object of a gas-generating, to provide an azide-free fuel mixture that consists of non-toxic Components, high thermal and chemical stability has good workability and is not hygroscopic and finally, a sufficient burn rate as well as a has good ignitability.
  • the fuel mixture according to the invention is free of heavy metals and can be manufactured with low manufacturing costs.
  • An advantageous development of the mixture of substances according to the invention can also contain a metal oxide in a
  • This metal oxide serves on the one hand as a coolant on the other hand u. U. as a ballistic additive.
  • fumaric acid C 4 H 4 O 4
  • Corresponding salts of fumaric acid in particular sodium, potassium, calcium, magnesium fumarates, can also advantageously be used as an organic compound.
  • the metal oxide can be selected from the groups Al 2 O 3 , B 2 O 3 , SiO 2 , TiO 2 , MnO 2 , CuO, Fe 2 O 3 and ZnO or a mixture thereof.
  • the stability test (Holland test) at a temperature of 110 ° C over a period of performed more than 70 hours.
  • the well-known showed Substance mixture (reference number 1) a weight loss of almost 0.8%, while the invention Substance mixture (reference number 2) less than 0.01% weight loss having.
  • the hygroscopicity test was carried out at a relative Humidity of 86% over a period of almost 100 hours.
  • Figure 2 is at known mixture of substances (reference number 1) Weight gain 13%, while in the invention Substance mixture (reference number 2) no weight absorption is measurable.
  • Substance mixture 2 was used to make a comparison with a further known fuel mixture (substance mixture 1) consisting of 30.8% by weight of 5-aminotetrazole, 36.1% by weight of sodium nitrate and 33.1% by weight. % Iron (III) oxide (cf. US 4,948,439).
  • the fuels were burned off in a conventional gas generator.
  • the fuel components were finely ground and pressed into tablets.
  • the amount of gas generated and the resulting gas pressure were sufficient to fill a 65 liter sack.
  • the measured harmful gas concentrations relate to a measuring volume of 60 l. The result of the test is shown in Figure 3.
  • the known mixture 1 produces 15,000 ppm carbon monoxide (CO), 500 ppm nitrogen oxides (NO x ) and 3,000 ppm ammonia (NH 3 ), whereas the mixture 2 according to the invention only produces 3,000 ppm carbon monoxide, but no nitrogen oxide and no ammonia.
  • a second fuel mixture according to the invention Embodiment contains 30.2% by weight of fumaric acid, 63.6% by weight of potassium perchlorate and 6.2% by weight of iron oxide. This iron oxide serves as a cooling reagent and sets the burn-up temperature is reduced by approx. 7%.
  • This also according to the invention Fuel mixture generated after a burn only a harmful gas content of approx.3,000 ppm Carbon monoxide.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Air Bags (AREA)

Claims (4)

  1. Mélange de matières générateur de gaz, en particulier en vue de produire du gaz propulseur pour des dispositifs de protection d'occupants dans des véhicules automobiles, caractérisé en ce que le mélange de matières se compose essentiellement
    a) d'acide fumarique ou de sels de l'acide fumarique dans une proportion de 20 à 45 % en poids ;
    b) d'un oxydant inorganique du groupe des perchlorates, chlorates, peroxydes ou de leurs mélanges, dans une proportion de 55 à 80 % en poids ; et
    c) d'un oxyde métallique dans une proportion de 0 à 20 % en poids.
  2. Mélange de matières générateur de gaz selon la revendication 1, caractérisé en ce que les sels de l'acide fumarique mis en oeuvre sont des fumarates de sodium, de potassium, de calcium ou de magnésium.
  3. Mélange de matières générateur de gaz selon la revendication 1 ou 2, caractérisé en ce que l'oxydant est du perchlorate de potassium.
  4. Mélange de matières générateur de gaz selon une des revendications précédentes, caractérisé en ce que l'oxyde métallique est sélectionné dans le groupe constitué de Al2O3, B2O3, SiO2, TiO2, MnO2, CuO, Fe2O3, ZnO ou de leurs mélanges.
EP95108938A 1994-07-01 1995-06-09 Compositions génératrices de gaz exempt d'azoture Expired - Lifetime EP0691317B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4423088 1994-07-01
DE4423088A DE4423088A1 (de) 1994-07-01 1994-07-01 Gaserzeugendes, azidfreies Stoffgemisch

Publications (3)

Publication Number Publication Date
EP0691317A2 EP0691317A2 (fr) 1996-01-10
EP0691317A3 EP0691317A3 (fr) 1997-03-05
EP0691317B1 true EP0691317B1 (fr) 2000-01-12

Family

ID=6522007

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95108938A Expired - Lifetime EP0691317B1 (fr) 1994-07-01 1995-06-09 Compositions génératrices de gaz exempt d'azoture

Country Status (5)

Country Link
US (1) US5525170A (fr)
EP (1) EP0691317B1 (fr)
JP (1) JP3693067B2 (fr)
KR (1) KR100229367B1 (fr)
DE (2) DE4423088A1 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5773748A (en) * 1995-06-14 1998-06-30 Regents Of The University Of California Limited-life cartridge primers
US6881284B2 (en) * 1995-06-14 2005-04-19 The Regents Of The University Of California Limited-life cartridge primers
EP0763511A3 (fr) * 1995-09-15 1997-05-07 Morton Int Inc Compositions d'allumage pour générateurs de gaz exempt d'azoture
US5817972A (en) * 1995-11-13 1998-10-06 Trw Inc. Iron oxide as a coolant and residue former in an organic propellant
DE19617538C1 (de) * 1996-05-02 1997-10-30 Temic Bayern Chem Airbag Gmbh Gaserzeugendes, azidfreies Stoffgemisch
DE19643468A1 (de) * 1996-10-22 1998-04-23 Temic Bayern Chem Airbag Gmbh Gaserzeugendes, azidfreies Feststoffgemisch
GB2333470B (en) * 1998-01-23 2002-05-01 Acs Ind Inc Filter with stiffening ribs
DE19812372C2 (de) * 1998-03-20 2001-10-04 Nigu Chemie Gmbh Gasgeneratortreibstoffe
DE19840993B4 (de) * 1998-09-08 2006-03-09 Trw Airbag Systems Gmbh & Co. Kg Verwendung eines gaserzeugenden Gemisches als Anzündmischung in einem Gasgenerator
USRE39611E1 (en) * 1998-12-15 2007-05-08 Acs Industries, Inc. Filter with stiffening ribs
US6277166B2 (en) 1999-03-31 2001-08-21 Acs Industries Inc. Filter with stiffening ribs
US6969433B1 (en) 1999-04-27 2005-11-29 Delphi Technologies, Inc. Granulated gas charges
FR2818636B1 (fr) * 2000-12-22 2003-02-28 Poudres & Explosifs Ste Nale Compositions pyrotechniques generatrices de gaz a liant hydrocarbone et procede de fabrication en continu
JP3828851B2 (ja) * 2002-01-17 2006-10-04 河合石灰工業株式会社 破砕用組成物
JP2004059331A (ja) * 2002-07-25 2004-02-26 Daicel Chem Ind Ltd ガス発生剤組成物
US20040154710A1 (en) * 2002-07-25 2004-08-12 Mamoru Watabiki Gas generating composition
JP3813560B2 (ja) * 2002-09-12 2006-08-23 河合石灰工業株式会社 破砕用組成物
US7435280B2 (en) * 2004-08-17 2008-10-14 Acs Industries, Inc. Wire mesh filter with improved hoop strength
US7811397B2 (en) * 2004-09-27 2010-10-12 Daicel Chemical Industries, Ltd. Gas generating agent
JP4634766B2 (ja) * 2004-09-27 2011-02-16 ダイセル化学工業株式会社 ガス発生剤
FR2959508B1 (fr) * 2010-04-29 2015-01-02 Snpe Materiaux Energetiques Compose pyrotechnique generateur de gaz; procede d'obtention
WO2014138512A2 (fr) 2013-03-08 2014-09-12 Metal Textiles Corporation Filtre à treillis de fil avec fil amélioré et procédé de réalisation du fil
US10350528B2 (en) 2016-10-04 2019-07-16 Metal Textiles Corporation Vehicle air bag filter with grooved wire

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US3214304A (en) * 1963-03-20 1965-10-26 Thiokol Chemical Corp Gas-generating compositions containing coolants and methods for their use
US3203842A (en) * 1963-09-09 1965-08-31 Atlantic Res Corp Linear polyester resin gas-generating compositions containing ammonium nitrate and perchlorate
GB1290418A (fr) * 1969-12-26 1972-09-27
US3862866A (en) * 1971-08-02 1975-01-28 Specialty Products Dev Corp Gas generator composition and method
CA971365A (en) * 1971-08-19 1975-07-22 George A. Lane Pyrotechnic composition for inflation of passive restraint systems
DE2142578A1 (de) * 1971-08-25 1973-03-01 Klippan Gmbh Treibsatz zum schnellen aufblasen eines hohlkoerpers
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US3839105A (en) * 1972-03-10 1974-10-01 Thiokol Chemical Corp Oxalyl dihydrazide compositions and use as a coolant in gas generating process
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FR2691706B1 (fr) 1992-06-02 1994-07-22 Livbag Snc Generateur pyrotechnique de gaz muni d'une ouverture de securite.

Also Published As

Publication number Publication date
JP3693067B2 (ja) 2005-09-07
DE4423088A1 (de) 1996-01-04
KR100229367B1 (ko) 1999-11-01
EP0691317A2 (fr) 1996-01-10
DE59507593D1 (de) 2000-02-17
KR960004303A (ko) 1996-02-23
EP0691317A3 (fr) 1997-03-05
US5525170A (en) 1996-06-11
JPH0840793A (ja) 1996-02-13

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