EP0374650A1 - Propergol stabilisé pour produire des gaz non toxiques sous pression - Google Patents

Propergol stabilisé pour produire des gaz non toxiques sous pression Download PDF

Info

Publication number
EP0374650A1
EP0374650A1 EP89122756A EP89122756A EP0374650A1 EP 0374650 A1 EP0374650 A1 EP 0374650A1 EP 89122756 A EP89122756 A EP 89122756A EP 89122756 A EP89122756 A EP 89122756A EP 0374650 A1 EP0374650 A1 EP 0374650A1
Authority
EP
European Patent Office
Prior art keywords
talc
propellant
weight
propellants
generating non
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.)
Granted
Application number
EP89122756A
Other languages
German (de)
English (en)
Other versions
EP0374650B1 (fr
Inventor
Richard Dr. Bender
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Publication of EP0374650A1 publication Critical patent/EP0374650A1/fr
Application granted granted Critical
Publication of EP0374650B1 publication Critical patent/EP0374650B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B35/00—Compositions containing a metal azide

Definitions

  • the present invention relates to a propellant for generating non-toxic gases, which is stabilized against the attack of atmospheric moisture and carbon dioxide as a result of the addition of certain substances.
  • propellants are preferably used in airbag generators, which must have a lifespan of 15 years.
  • Propellants for generating non-toxic propellant gases are known per se. They contain the non-explosive salts of hydrochloric acid, mainly alkali azides, as gas-supplying components, and alkali metal nitrates or perchlorates as oxidizing agents. CuO as an oxidizing agent has also been proposed. For better slag formation, fine-grained silicon dioxide and / or boron oxide or other melt-forming substances may be added to the sets (cf. DE 22 36 175-C3).
  • these azide-containing propellant mixtures have the disadvantage that they decompose to form free hydrochloric acid even when stored in atmospheric moisture containing carbon dioxide.
  • these sealing agents do not guarantee total moisture exclusion for an airbag generator which is manufactured using a propellant thus protected during its entire service life.
  • the task was therefore to find propellants for the production of non-toxic propellant gases, which do not release hydrogen nitric acid even when moist and carbon dioxide-containing air is admitted.
  • propellants based on alkali azides and inorganic oxidizing agents have now been found, which are characterized in that they contain, as stabilizers, magnesium oxide and / or talc in amounts of between 3 and 10% by weight, based on the total batch.
  • the azide-containing propellants can also be stored in humid and carbon dioxide-containing air without releasing hydrochloric acid.
  • the additive according to the invention has a particularly advantageous effect on those azide-containing propellants which additionally contain melt-forming substances, such as pyrogenic silica or boron oxide, since the presence of these compounds in such propellants favor the release of hydrochloric acid.
  • Azide-containing propellants with these melt-forming additives are also stabilized according to the invention.
  • the additives according to the invention also act as pressing aids in the production of tablets from the propellants according to the invention. Such tablets show better cohesion and are therefore more mechanically stressed than tablets that do not contain the additive.
  • This improved mechanical strength is achieved in particular by adding talc with a net-like structure.
  • Talc is to be understood according to the invention as the naturally occurring mineral of the ideal formula 3 MgO ⁇ 4 SiO2 ⁇ H2O, in which parts of the magnesium oxide can be replaced by calcium oxide.
  • the calcium oxide content of the talc can be between 0 and 6% by weight, based on the talc.
  • the magnesium oxide in the talc can also be partially replaced by Al2O3 or iron oxide.
  • the proportion of these oxides in talc can be up to 4% by weight for Al2O3 and up to 2% by weight for Fe2O3.
  • the MgO content of the talcum used according to the invention is between 26 and 31.6%.
  • the talc must be asbestos-free when using the propellants according to the invention in gas generators for vehicle airbags.
  • the talc and MgO content in the propellants according to the invention is between 3 and 10% by weight, preferably between 5 and 8% by weight. In principle it is possible to use only one of the two substances to achieve the desired effect. However, a mixture of the two substances is preferably used, the weight ratio of MgO: talc preferably being between 1: 1.3 and 1:10, particularly preferably between 1: 2 and 1: 3.
  • the propellants according to the invention preferably also contain a melt-promoting substance, as described, for example, in DE 22 36 175-C3.
  • Finely dispersed silica or boron oxide is preferably used for this purpose.
  • the finely dispersed silica has a specific surface area of 100 to 500 m2 / g, preferably 200 to 400 m2 / g, and is preferably used in amounts between 16 and 20% by weight, based on the entire set.
  • the proportion of alkali azides in the claimed sentences is generally between 50 and 60% by weight, preferably between 54 and 57% by weight.
  • the preferred oxidizing agent is potassium nitrate, which can also be partially replaced by sodium nitrate.
  • other inorganic oxidizing agents can also be used in principle.
  • a mixture was made from 57 parts by weight of sodium azide 18 parts by weight of potassium nitrate 18 parts by weight of pyrogenic silica (specific surface 200 m2 / g) 5 parts by weight of talc 2 parts by weight of MgO.
  • the talc had a share of CaO of 4.0 wt .-% and Al2O3 of 3.0 wt .-%. As a result, the MgO content was 28.0% by weight.
  • the mixture was pressed at a pressure of about 1 t / cm2 to tablets of 20 to 30 mm in diameter.
  • a pressure of about 1 t / cm2 to tablets of 20 to 30 mm in diameter.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Medicinal Preparation (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Air Bags (AREA)
  • Detergent Compositions (AREA)
EP89122756A 1988-12-20 1989-12-09 Propergol stabilisé pour produire des gaz non toxiques sous pression Expired - Lifetime EP0374650B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3842838A DE3842838C1 (fr) 1988-12-20 1988-12-20
DE3842838 1988-12-20

Publications (2)

Publication Number Publication Date
EP0374650A1 true EP0374650A1 (fr) 1990-06-27
EP0374650B1 EP0374650B1 (fr) 1993-03-31

Family

ID=6369605

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122756A Expired - Lifetime EP0374650B1 (fr) 1988-12-20 1989-12-09 Propergol stabilisé pour produire des gaz non toxiques sous pression

Country Status (3)

Country Link
US (1) US4981536A (fr)
EP (1) EP0374650B1 (fr)
DE (2) DE3842838C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU620703B2 (en) * 1989-05-04 1992-02-20 Morton International, Inc. Gas generant compositions containing salts of 5-n1 trobarbituric acid, salts of nitroorotic acid, or 5-nitrouracil
EP0474115A1 (fr) * 1990-09-03 1992-03-11 Nippon Kayaku Kabushiki Kaisha Composition génératrice de gaz pour coussin d'air de véhicules

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5089069A (en) * 1990-06-22 1992-02-18 Breed Automotive Technology, Inc. Gas generating composition for air bags
EP0579781A4 (fr) * 1991-04-11 1994-12-07 Talley Defence Systems Inc Compositions de propulseurs a azotures utilisees pour le deballastage d'urgence de vaisseaux submersibles.
US5387296A (en) * 1991-08-23 1995-02-07 Morton International, Inc. Additive approach to ballistic and slag melting point control of azide-based gas generant compositions
US5143567A (en) * 1991-08-23 1992-09-01 Morton International, Inc. Additive approach to ballistic and slag melting point control of azide-based gas generant compositions
DE4218531C1 (fr) * 1991-10-11 1993-07-15 Bayern-Chemie Gesellschaft Fuer Flugchemische Antriebe Mbh, 8261 Aschau, De
US5726382A (en) * 1995-03-31 1998-03-10 Atlantic Research Corporation Eutectic mixtures of ammonium nitrate and amino guanidine nitrate
DE19543796B4 (de) * 1995-11-24 2004-11-25 Temic Bayern-Chemie Airbag Gmbh Gasgenerator für ein Airbagsystem
US6071364A (en) * 1997-02-19 2000-06-06 Breed Automotive Technology, Inc. Gas generating compositions containing mica
CN106631645B (zh) * 2016-09-30 2018-09-21 唐山师范学院 二氧化碳相变致裂用发热剂
CN107721784B (zh) * 2017-11-07 2020-03-31 湖北航天化学技术研究所 一种包含组合安定剂的叠氮基复合固体推进剂

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981616A (en) * 1956-10-01 1961-04-25 North American Aviation Inc Gas generator grain
US3692687A (en) * 1971-06-04 1972-09-19 Hercules Inc Process for stabilizing hydrox compositions containing magnesium oxides
FR2193800A1 (fr) * 1972-07-24 1974-02-22 Bayern Chemie Gmbh Flugchemie
FR2219918A1 (fr) * 1973-03-03 1974-09-27 Asahi Chemical Ind

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936330A (en) * 1973-08-08 1976-02-03 The Dow Chemical Company Composition and method for inflation of passive restraint systems
GB1520497A (en) * 1975-04-23 1978-08-09 Daicel Ltd Gas-generating agent for air bag
US4734141A (en) * 1987-03-27 1988-03-29 Hercules Incorporated Crash bag propellant compositions for generating high quality nitrogen gas

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981616A (en) * 1956-10-01 1961-04-25 North American Aviation Inc Gas generator grain
US3692687A (en) * 1971-06-04 1972-09-19 Hercules Inc Process for stabilizing hydrox compositions containing magnesium oxides
FR2193800A1 (fr) * 1972-07-24 1974-02-22 Bayern Chemie Gmbh Flugchemie
FR2219918A1 (fr) * 1973-03-03 1974-09-27 Asahi Chemical Ind

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU620703B2 (en) * 1989-05-04 1992-02-20 Morton International, Inc. Gas generant compositions containing salts of 5-n1 trobarbituric acid, salts of nitroorotic acid, or 5-nitrouracil
EP0474115A1 (fr) * 1990-09-03 1992-03-11 Nippon Kayaku Kabushiki Kaisha Composition génératrice de gaz pour coussin d'air de véhicules

Also Published As

Publication number Publication date
DE3842838C1 (fr) 1990-01-11
EP0374650B1 (fr) 1993-03-31
US4981536A (en) 1991-01-01
DE58903966D1 (de) 1993-05-06

Similar Documents

Publication Publication Date Title
DE69220412T2 (de) Verfahren zur Kontrolle der Menge von Stickoxiden im generierten Gas für Airbags
EP0374650B1 (fr) Propergol stabilisé pour produire des gaz non toxiques sous pression
DE69004787T2 (de) Gaserzeugende Azid enthaltende Zusammensetzung für aufblasbare Vorrichtungen.
EP0691317B1 (fr) Compositions génératrices de gaz exempt d'azoture
DE4412871C2 (de) Zusammensetzungen für Gasgeneratoren
DE2236175C3 (de) Treibmittel zur Erzeugung ungiftiger Treibgase
EP0905108B1 (fr) Mélange générateur de gaz sans particules
EP0665201B1 (fr) Mélange générateur de gaz
DE69323410T2 (de) Gaserzeugungsmittel für airbags
DE2334063B2 (de) Kompositpulver
DE2745076C3 (de) Massen auf Polyamidbasis
DE3733176C2 (fr)
DE19730872A1 (de) Pyrotechnische Mischung als Treibmittel oder als Gassatz mit Kohlenmonoxid-reduzierten Schwaden
DE19840993B4 (de) Verwendung eines gaserzeugenden Gemisches als Anzündmischung in einem Gasgenerator
DE4218531C1 (fr)
WO1998017607A1 (fr) Melange de substances solides generateur de gaz et exempt d'acide
EP1162183A1 (fr) Mélange d'allumage pour utilisation dans les générateurs de gaz
DE3935869C1 (fr)
DE102020104119A1 (de) Gaserzeugende zusammensetzung und deren verwendung in einem gasgenerator
DE102015014428A1 (de) Thermische Frühzündmittel
DE60012933T2 (de) Zusammengesetztes, gaserzeugendes material für gasbetriebene fahrzeugsicherheitseinrichtungen
DE2329558A1 (de) Giessfaehige gasgeneratortreibstoffe
DE19617538C1 (de) Gaserzeugendes, azidfreies Stoffgemisch
DE19531130A1 (de) Gaserzeugende Masse mit einem Verschlackungsmittel
DE3713267C2 (de) Flammwidrige Silikonkautschuk-Masse und ihre Verwendung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19901109

17Q First examination report despatched

Effective date: 19920214

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed
AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 58903966

Country of ref document: DE

Date of ref document: 19930506

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930420

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19961126

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19961216

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970212

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971209

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19971231

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19971209

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980901

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051209