SE470480B - Fuel for Air bags - Google Patents
Fuel for Air bagsInfo
- Publication number
- SE470480B SE470480B SE9202854A SE9202854A SE470480B SE 470480 B SE470480 B SE 470480B SE 9202854 A SE9202854 A SE 9202854A SE 9202854 A SE9202854 A SE 9202854A SE 470480 B SE470480 B SE 470480B
- Authority
- SE
- Sweden
- Prior art keywords
- gas
- releasing substance
- weight
- rdx
- nitrocellulose
- Prior art date
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
- C06B25/00—Compositions containing a nitrated organic compound
- C06B25/34—Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
Description
470 480 2 (11-1200°C) samt utan avgivande av andra giftiga gaser och endast begränsade mängder vattenånga. 470 480 2 (11-1200 ° C) and without the release of other toxic gases and only limited amounts of water vapor.
En nackdel med användningen av NTO som gasavgivande substans är dock att det är ett förhållandevis dyrt explosivämne. Det är f.n. t ex 10-30 ggr dyrare än hexogen (RDX) eller cyklo-1,3,5-trimetylen-2,4,6-trinitramin. NTO är dessutom vattenlösligt varför man inte helt kan utesluta att det är giltigt och eftersom det är relativt nytt som explosivämne är det ännu relativt lite känt och bl a är dess lagringsbe- ständighet under olika förhållanden inte helt utredd.A disadvantage of the use of NTO as a gas-releasing substance is however, that it is a relatively expensive explosive. It is U.N. eg 10-30 times more expensive than hexogen (RDX) or cyclo-1,3,5-trimethylene-2,4,6-trinitramine. NTO is also water soluble why one can not completely rule out that it is valid and because it is relatively new as an explosive it is still relatively little known and, among other things, its storage permanence under different conditions not fully investigated.
I stället föreslås nu i enlighet med föreliggande uppfinning användningen av endera av de tvâ välkända och väl beprövade högenergisprängämnena hexogen (RDX) eller oktogen (HMX) som huvudkomponent i en för airbags aggregat avsedd gasbildande substans. Enligt föreliggande uppfinning skall sålunda 50-95 vikts-% av den gasavgivande substansen för airbags aggregat bestå av finkristallin RDX eller HMX. Dessutom kan ingå 5-50 vikts-% av ett energetiskt eller icke energetiskt brännbart med övriga komponenter kompatibelt plastiskt bindemedel såsom poly- uretan (PU), cellulosaacetatbutyrat (CAB), hydroxyterminerad polybutadien (HTPB) etylcellulosa (E.C), glycidylacidpolymerer (GAP), polymerer av 3-nitratometyl-3-metyloxetan (polynimmo), eller polymerer av glycidylnitrat (Polyglyn). Dessutom kan ingå upp till 5 vikts-% nitrocellulosa samt alternativa i och för sig kända mjukgörare och andra i krut och sprängämnessammanhang kända mindre tillsatser med annan funktion.Instead, it is now proposed in accordance with the present invention the use of either of the two well-known and well-proven the high energy explosives hexogen (RDX) or octogen (HMX) as main component in a gas-forming unit intended for airbag units substance. Thus, according to the present invention, 50-95 % by weight of the gas-emitting substance for airbag units consist of fine crystalline RDX or HMX. In addition, may include 5-50 % by weight of an energetically or non-energetically combustible with other components compatible plastic adhesive such as urethane (PU), cellulose acetate butyrate (CAB), hydroxy terminated polybutadiene (HTPB) ethylcellulose (E.C), glycidylacid polymers (GAP), polymers of 3-nitratomethyl-3-methyloxetane (polynimmo), or polymers of glycidyl nitrate (Polyglyn). Also can be included up to 5% by weight of nitrocellulose and alternatives per se known plasticizers and others known in gunpowder and explosives contexts minor additives with a different function.
Sammansättningsmässigt ligger den i enlighet med uppfinningen använda produkten nära två andra i och för sig kända produk- ter nämligen sprängämnena av typen PBX d v s "plastic bound explosives" och de s k LOVA-kruten. I båda dessa fallen är dock användningsområdena radikalt annorlunda samtidigt som PBX sprängämnena innehåller kristallina explosivämnen med en medelkornstorlek om 1-2 mm medan produkten enligt uppfinningen 3 470 488 och LOVA-kruten (som är tänkta som lâgkänsliga alternativ till de vanliga nitrocellulosakruten) innehåller kristallina explo- sivämnen med en medelpartikelstorlek om 1-20 um. Vid använd- ningen i enlighet med föreliggande uppfinning är detta ett villkor för att ge produkten lämplig brinnhastighet.In terms of composition, it is in accordance with the invention use the product close to two other products known per se namely the explosives of the type PBX i.e. plastic bound explosives "and the so-called LOVA powder. In both these cases are however, the uses are radically different at the same time as PBX the explosives contain crystalline explosives with a average grain size of 1-2 mm while the product according to the invention 3 470 488 and the LOVA powder (which are intended as low-sensitivity alternatives to the common nitrocellulose powders) contain crystalline sieves with an average particle size of 1-20 μm. When using in accordance with the present invention, this is a conditions to give the product a suitable burning rate.
Gemensamt för samtliga dessa tre produkttyper gäller att det kristallina explosivämnet utnyttjas sammanbundet med bindemedlet till betydligt större partiklar, granulat eller kroppar än de enskilda explosivämneskristallerna. I PBX-sammanhang där det gäller sprängämneskroppar som skall detoneras kan dessa kroppar bli mycket stora medan LOVA- kruten som främst utnyttjas som drivkrut i artilleripjäser och alltså skall förbrännas under deflagration och inte detoneras får de använda krutkropparna i regel samma storlek och form som de nitrocellulosakrut, som de är avsedda att ersätta dock med den skillnaden att den tillgängliga brinnarean ofta måste utökas jämfört med nitrocellulosakruten eftersom LOVA-kruten rent generellt har lägre brinnhastigheter än nitrocellulosakru- ten. En större brinnarea för ett krut kan t ex åstadkommas genom att ett flerhâlskrut ges fler brinnkanaler.Common to all these three product types is that the crystalline explosive is used in conjunction with the binder to much larger particles, granules or bodies than the individual explosive crystals. IN PBX context in which explosive bodies are to be used detonated, these bodies can become very large while the LOVA the powder used primarily as propellant in artillery pieces and thus shall be incinerated during deflagration and not detonated the gunpowder bodies used are usually the same size and shape as however, the nitrocellulose herbs, which they are intended to replace the difference that the available burn area often has to increased compared to the nitrocellulose powder because the LOVA powder generally have lower burning rates than nitrocellulose ten. A larger burning area for a gunpowder can be achieved, for example by giving a multi-neck gun more burn channels.
Medan PBX produkter avses att detoneras och därvid användas i helt andra konfigurationer och innehåller kristallina explosiv- ämnen av helt annan kristallstorlek än LOVA-kruten och den enligt uppfinningen använda produkten så utgöres skillnaden mellan LOVA-kruten och för den enligt uppfinningen aktuella produkten främst mellan respektive användningsområden varvid LOVA-kruten alltså användes som drivmedel i främst artilleri- pjäser medan uppfinningen avser ett mera udda användningsom- råde för kristallina högenergisprängämnen nämligen som vid sin förbränning gasavgivande substans i airbag-aggregat.While PBX products are intended to be detonated and thereby used in completely different configurations and contains crystalline explosive substances of a completely different crystal size than the LOVA powder and the according to the invention, the difference is the difference between the LOVA powder and for the one according to the invention the product mainly between the respective areas of use, whereby The LOVA powder was thus used as a fuel in mainly artillery pieces while the invention relates to a more odd use for crystalline high-energy explosives namely as at its combustion gas-emitting substance in airbag units.
Rent generellt bygger alltså uppfinningen på att använda endera av två specifika välkända kristallina högenergisprängämnen som huvudgasbildare i krockskyddsaggregat av typen airbags för bilar. 470 489 a Fördelarna med detta något udda val framgår klart när man väl har vågat tänka tanken till slut att införliva högenergispräng- ämnen i vardagsfordon. Det är nämligen sedan länge ett välkänt faktum i explosivämneskretsar att de bägge aktuella högenergi- sprängämnena RDX och HMX har en mycket ringa åldring även vid höga temperaturer. De ovan föreslagna plastiska bindemedlen har dessutom en god förenlighet med de aktuella högenergispräng- ämnena.In general, the invention is thus based on using either of two specific well-known crystalline high-energy explosives such as main gas generator in airbags for airbags bilar. 470 489 a The benefits of this somewhat odd choice are clear once and for all have dared to think in the end about incorporating high-energy explosives substances in everyday vehicles. It has long been a well-known fact the fact in explosives circles that the two current high-energy the explosives RDX and HMX have a very slight aging even at high temperatures. The plastic binders proposed above have in addition, good compatibility with the current high-energy explosives the substances.
Genom utnyttjandet av kunskaper från mera normal användning av dessa högenergisprängämnen och de redan omnämnda dylika inne- hållande s k LOVA-krut finns det dessutom goda att på önskat sätt skräddarsy brinnegenskaperna för i enlighet med upp- finningen utformade vid sin förbränning gasavgivande pyrosatser.Through the utilization of knowledge from more normal use of these high-energy explosives and the already mentioned such holding so-called LOVA gunpowder, there are also good ones to be desired tailor the burning properties in accordance with the the invention designed gas-emitting pyrosates during its combustion.
Produkten enligt uppfinningen kan alltså innehålla små mängder nitrocellulosa. Dessa har emellertid ej visat sig kunna påverka produktens goda lagringsbeständighet.The product according to the invention may thus contain small amounts nitrocellulose. However, these have not been shown to be able to influence good storage durability of the product.
De i enlighet med uppfinningen aktuella produkternas brinnhastigheter blir som alltid beroende dels av vilken komponent som ingår och i vilken mängd samt vid förbränningen tillgänglig brinnarea och RDX respektive HMX kristallernas partikelstorlek och under vilket tryck förbränningen sker.The products of the present product in accordance with the invention burn speeds will, as always, depend partly on which component that is included and in what amount and during combustion available burner area and RDX and HMX crystals, respectively particle size and under which pressure the combustion takes place.
För bestämning av dessa kriterier krävs dock i första hand en fackmannamässig utprovning med avseende på varje aktuell gasgenerators volym och strömningstekniska utformning samt önskad gasmängd per tidsenhet gastryck m m. Dessa detaljer kommer därför inte närmare att beskrivas i detta sammanhang.To determine these criteria, however, one is primarily required professional testing with respect to each current gas generator volume and flow engineering design as well desired amount of gas per unit time gas pressure etc. These details will therefore not be described in more detail in this context.
För reducering av vid förbränningen bildad koloxid kan man tillföra en syreavgivande substans såsom kaliumnitrat eller annat oxidationsmedel, vilket visat sig ge en markant sänkning av koloxidhalten. Framförallt vid sådana airbagaggregat som ventileras in i fordonskupên kan det vara motiverat att tillföra rätt höga halter oxidationsmedel såsom 30 % och däröver.To reduce the carbon monoxide formed during combustion, you can add an oxygen-releasing substance such as potassium nitrate or other oxidizing agent, which has been found to give a marked reduction of the carbon monoxide content. Especially with such airbags as ventilated into the vehicle compartment, it may be justified that add fairly high levels of oxidizing agents such as 30% and over it.
Uppfinningen har definierats i de efterföljande patentkraven och nedan skall anges exempel på några för användning i enlighet med uppfinningen lämpliga sammansättningar.The invention has been defined in the appended claims and below are examples of some for use in according to the invention suitable compositions.
Alt 1 76 vikts-% RDX 12 -"- % CAB 7 6 -"- % TBC (tributylcitrat) 4 -"- % Nitrocellulosa 0.4 -"- % etylcentralit 78 vikts-% RDX 15 -"- -% CAB 7 -"- -% TBC Alt 3 80 vikts-% RDX 20 -"- -% HTPB hydroxyterminerad polybutadien I ovan angivna exempel har RDX generellt angivits som kristallint explosivämne detta kan dock utan vidare men givetvis med en något ändrad brinnhastighet ersättas av ett eller flera av inledningsvis angivna andra kristallina högener- gisprängämnen.Alt 1 76% by weight RDX 12 - "-% CAB 7 6 - "-% TBC (tributyl citrate) 4 - "-% Nitrocellulose 0.4 - "-% ethylcentralite 78% by weight RDX 15 - "- -% CAB 7 - "- -% TBC Alt 3 80% by weight RDX 20 - "- -% HTPB hydroxy-terminated polybutadiene In the above examples, RDX has generally been stated as crystalline explosive this can, however, without further but of course with a slightly changed burning rate replaced by one or several of the initially indicated other crystalline high-energy explosives.
I samtliga ovan angivna vid sättet i enlighet med uppfinningen användbara substanser skall det kristallina explosivämnet ha en medelpartikelstorlek av 1-20 pm och då företrädesvis omkring 5 pm.In all of the above in the method according to the invention useful substances, the crystalline explosive shall have a average particle size of 1-20 μm and then preferably about 5 pm.
Claims (5)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9202854A SE470480B (en) | 1992-10-02 | 1992-10-02 | Fuel for Air bags |
| EP19930850181 EP0591119A3 (en) | 1992-10-02 | 1993-09-21 | Propellant for airbags |
| JP5269547A JPH06219882A (en) | 1992-10-02 | 1993-10-01 | Gas generating substance for air bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9202854A SE470480B (en) | 1992-10-02 | 1992-10-02 | Fuel for Air bags |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE9202854D0 SE9202854D0 (en) | 1992-09-21 |
| SE9202854L SE9202854L (en) | 1994-04-03 |
| SE470480B true SE470480B (en) | 1994-05-24 |
Family
ID=20387336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE9202854A SE470480B (en) | 1992-10-02 | 1992-10-02 | Fuel for Air bags |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0591119A3 (en) |
| JP (1) | JPH06219882A (en) |
| SE (1) | SE470480B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998018743A1 (en) * | 1996-10-31 | 1998-05-07 | Bofors Explosives Ab | Gas-emitting substance |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5553889A (en) * | 1994-03-18 | 1996-09-10 | Oea, Inc. | Hybrid inflator with rapid pressurization-based flow initiation assembly |
| US5616883A (en) * | 1994-03-18 | 1997-04-01 | Oea, Inc. | Hybrid inflator and related propellants |
| US5788275A (en) | 1994-03-18 | 1998-08-04 | Oea, Inc. | Hybrid inflator |
| DE69523499T2 (en) * | 1994-03-18 | 2002-09-12 | Autoliv Asp Ogden | Hybrid inflator with a fast pressurized flow induction device |
| EP0980798B1 (en) * | 1994-03-18 | 2002-01-30 | Autoliv Asp, Inc. | Hybrid inflator and propellants therefor |
| DE4415255C2 (en) * | 1994-04-30 | 1997-09-04 | Fraunhofer Ges Forschung | Pyrotechnic charge to release trapped compressed gas |
| IL115567A0 (en) * | 1994-10-25 | 1996-01-19 | Oea Inc | Compact hybrid inflator |
| US5913537A (en) * | 1995-06-09 | 1999-06-22 | Trw Vehicle Safety Systems Inc. | Hybrid inflator including non-metallic nitrogen containing ignitable material |
| US5507891A (en) * | 1995-08-11 | 1996-04-16 | Alliant Techsystems Inc. | Propellant composition for automotive safety applications |
| US5868424A (en) * | 1996-03-06 | 1999-02-09 | Oea, Inc. | Substantially smoke-free and particulate-free inflator for inflatable safety restraint system |
| US6120058A (en) * | 1996-08-23 | 2000-09-19 | Trw Vehicle Safety Systems Inc. | Air bag inflator |
| FR2761982B1 (en) * | 1997-04-11 | 1999-05-07 | Livbag Snc | PROCESS FOR ENSURING A PROGRESSIVE DEPLOYMENT OF A PYROTECHNIC PROTECTION AND LOADING CUSHION FOR ITS IMPLEMENTATION |
| US6334917B1 (en) | 1998-10-23 | 2002-01-01 | Autoliv Asp, Inc. | Propellant compositions for gas generating apparatus |
| US6120626A (en) * | 1998-10-23 | 2000-09-19 | Autoliv Asp Inc. | Dispensing fibrous cellulose material |
| US6176517B1 (en) | 1998-10-23 | 2001-01-23 | Autoliv Aspinc. | Gas generating apparatus |
| KR100420563B1 (en) * | 1999-06-25 | 2004-03-02 | 니뽄 가야쿠 가부시키가이샤 | Gas-generating agent composition |
| US6334961B1 (en) * | 1999-11-09 | 2002-01-01 | Atlantic Research Corporation | Low ash gas generant and ignition compositions for vehicle occupant passive restraint systems |
| EP1539657A2 (en) * | 2002-09-12 | 2005-06-15 | Textron Systems Corporation | Multi-stage gas generator and gas generants |
| FR2954309B1 (en) * | 2009-12-21 | 2012-03-23 | Eurenco France | MALLEABLE SOLID EXPLOSIVE AND ITS OBTAINING |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3362859A (en) * | 1965-10-21 | 1968-01-09 | Thiokol Chemical Corp | Gas-generating compositions and their preparation |
| US4180424A (en) * | 1973-01-17 | 1979-12-25 | The United States Of America As Represented By The Secretary Of The Army | Control of burning rate and burning rate exponent by particle size in gun propellants |
| US4283237A (en) * | 1973-01-17 | 1981-08-11 | Thiokol Corporation | Method of making a gun propellant composition |
| NL194964C (en) * | 1986-07-04 | 2003-09-02 | Bae Systems Plc | Energy-rich composition. |
| US4707540A (en) * | 1986-10-29 | 1987-11-17 | Morton Thiokol, Inc. | Nitramine oxetanes and polyethers formed therefrom |
| JPH02293389A (en) * | 1989-05-09 | 1990-12-04 | Nippon Koki Kk | Gas-generating agent for power-generation apparatus for winding of seat belt |
| FR2652322B1 (en) * | 1989-09-27 | 1991-11-22 | Livbag Snc | SHOCK ABSORBING DEVICE FOR OCCUPANTS OF A MOTOR VEHICLE AND USE OF THIS DEVICE. |
| DE3934368C1 (en) * | 1989-10-14 | 1990-11-15 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De | |
| US5125684A (en) * | 1991-10-15 | 1992-06-30 | Hercules Incorporated | Extrudable gas generating propellants, method and apparatus |
-
1992
- 1992-10-02 SE SE9202854A patent/SE470480B/en not_active IP Right Cessation
-
1993
- 1993-09-21 EP EP19930850181 patent/EP0591119A3/en not_active Withdrawn
- 1993-10-01 JP JP5269547A patent/JPH06219882A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998018743A1 (en) * | 1996-10-31 | 1998-05-07 | Bofors Explosives Ab | Gas-emitting substance |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06219882A (en) | 1994-08-09 |
| SE9202854D0 (en) | 1992-09-21 |
| EP0591119A3 (en) | 1994-04-27 |
| EP0591119A2 (en) | 1994-04-06 |
| SE9202854L (en) | 1994-04-03 |
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