WO2000064840A1 - Granulierte gassätze - Google Patents
Granulierte gassätze Download PDFInfo
- Publication number
- WO2000064840A1 WO2000064840A1 PCT/EP2000/003696 EP0003696W WO0064840A1 WO 2000064840 A1 WO2000064840 A1 WO 2000064840A1 EP 0003696 W EP0003696 W EP 0003696W WO 0064840 A1 WO0064840 A1 WO 0064840A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas sets
- sets according
- gas
- alkaline earth
- weight
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B29/00—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate
- C06B29/02—Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal
-
- 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 granulated gas sets and their use.
- the common method for producing gas sets for example for automotive safety, is to compress the raw materials into tablets. With these tablets, the desired burning process can be achieved. Disadvantages of this technology are the costly manufacture of the tablets and the high pressures required to achieve strength when pressing, particularly with regard to safety.
- the raw materials are usually mixed with one another dry or, if appropriate, with small amounts of pressing aids and pressed together.
- the object of the present invention is to provide novel granulated gas sets.
- the aforementioned object of the invention is achieved by granulated gas sets with nitrogen oxide-free and low-carbon monoxide fumes, which
- binders in an amount of 5 to 50% by weight
- oxidizing agents in an amount of 0 to 90% by weight
- organic, in particular nitrogen-free fuels in an amount of 0 to 75% by weight.
- the present invention relates in particular to combinations of binders, metal salts of oxidizing acids and / or organic, preferably nitrogen-free fuels for use, for example, in gas generators as pyrotechnic mixtures for producing gases.
- the gas sets are obtained by granulating the components from a solvent-containing suspension of the components by adding water.
- the gas sets defined according to the invention are characterized by nitrogen oxide-free and significantly reduced carbon monoxide fumes and a high thermal stability compared to conventional materials produced on the basis of nitrocellulose as the sole energy source. Furthermore, they are characterized by the simple manufacturing process and the associated control of the burning rate via grain size, additives and coating sets.
- the gas sets defined according to the invention are preferably based on mixtures of nitrogen-free components as energy sources and binders with proportions by weight of 5 to 50% by weight, such as cellulose acetate, cellulose acetate butyrate, cellulose acetate, nitrocellulose (here a subordinate amount in the function as binder) and polyvinyl butyral.
- Perchlorates of, for example, the alkali and alkaline earth metals, zinc peroxide, iron oxides, cerium dioxide, copper oxide, permanganates, tin dioxide and manganese dioxide can be used as oxidizing agents.
- Potassium perchlorate and zinc peroxide are preferably used in proportions by weight of 0 to 90% by weight.
- Organic nitrogen-free fuels such as terephthalic acid, fumaric acid and / or ascorbic acid can be added in parts by weight of 0 to 75% by weight.
- Aluminum oxide, zinc oxide, silicates of alkali and alkaline earth metals, clays of different compositions, cement, gypsum, carbonates of alkali and alkaline earth metals, oxalic acid, for example oxalates of alkali and alkaline earth metals, can also be used as additives for combustion moderation.
- Substances such as graphite, water glass, nitrates and perchlorates of the alkali and alkaline earth elements are suitable as coating additives.
- the gas sets defined according to the invention are produced by granulation, in a preferred embodiment into a kind of “ball powder”
- Sphere powder is usually understood to mean a propellant powder made from spherical powder elements, which is usually produced by a special process developed by Olin Mathieson, USA.
- a high-strength nitrocellulose solution in a water-immiscible solvent, for example methyl or ethyl acetate, is added to water with careful stirring distributed in such a way that floating balls form.Warming below the boiling point of the solvent leads to progressive depletion of solvents and thus hardening of the floating balls.
- the process for producing the gas sets according to the invention is thus characterized by simple handling and high safety, since almost exclusively solvent and / or water-moist components are used here.
- the binders defined according to the invention are dissolved in a suitable solvent (for example methyl acetate); for this purpose, the oxidizing agent and the additives are added after the binder has dissolved.
- a suitable solvent for example methyl acetate
- Water is added with stirring to precipitate the granules.
- Water-soluble components can be used after a suitable coating or by encapsulation. If residual solubility still exists, it is possible to work with appropriately saturated solutions.
- the rate of water dropping and the stirring speed the geometry, particle size distribution and bulk density of the granules can be controlled.
- handling additives and combustion behavior can be modified in a manner known per se by coating additives.
- the coatings can be applied either by applying the dry substances or by spraying using methods known per se.
- Granules in the sense of the present invention describe the term derived from granules for accumulations of granules.
- a granulate is therefore an asymmetrical agglomerate of powder particles (whole crystals, crystal fragments or particles).
- the shape of a sphere, a rod, a cylinder, etc. is only approximate and indicated.
- the surface is usually uneven and jagged, the mass in many cases more or less porous.
- An essential criterion of the gas sets according to the invention includes the flammability of the spherical powder. Possible combinations of the components a), b) and / or c) result in compositions which, however, cannot be referred to as combustible spherical powder in the sense of the present invention. In the sense of the present invention, a combustible and therefore powder according to the invention denotes such behavior in which the powder continues to burn after ignition, even if the ignition source is removed.
- the gas sets defined according to the invention are particularly suitable for use in motor vehicle systems such as, for example, belt tensioners or airbags and commercial cartridges for generating gas, for example in bolt-setting devices.
- the gas sets defined according to the invention are characterized by non-toxic fumes and residues.
- Table 1 shows the composition (% by weight) and the safety characteristics of the example mixtures 1 to 3, the specified components for the mixtures according to the invention were weighed in the weight ratios indicated and added to the binders dissolved in methyl acetate. Water was then added with stirring and the resulting granules were filtered off. After drying, the granules were sieved and could be surface-treated.
- BAM Federal Institute for Materials Research and Testing
- burning tests were carried out in a closed 25 ml stainless steel pressure bomb.
- the burn-up tests were carried out by weighing the sample mixtures of 3 g with ignition using a glow wire and 0.2 g of an ignition mixture consisting of boron / potassium nitrate and recording the pressure-time curve using a piezoelectric measuring system.
- Table 2 shows a summary of the pressure rise times ( ⁇ t), the percentages relating to the maximum pressure.
- the composition of the burn-up vapor was determined using a thermodynamic computer program (ICT code) and is shown in Table 2.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Air Bags (AREA)
- Automotive Seat Belt Assembly (AREA)
- Glanulating (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000613794A JP2002543031A (ja) | 1999-04-27 | 2000-04-26 | 粒状ガス装入材料 |
US10/030,007 US6969433B1 (en) | 1999-04-27 | 2000-04-26 | Granulated gas charges |
EP00929423A EP1189854A1 (de) | 1999-04-27 | 2000-04-26 | Granulierte gassätze |
AU47515/00A AU4751500A (en) | 1999-04-27 | 2000-04-26 | Granulated gas charges |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19919065.8 | 1999-04-27 | ||
DE19919065 | 1999-04-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000064840A1 true WO2000064840A1 (de) | 2000-11-02 |
Family
ID=7905997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/003696 WO2000064840A1 (de) | 1999-04-27 | 2000-04-26 | Granulierte gassätze |
Country Status (6)
Country | Link |
---|---|
US (1) | US6969433B1 (de) |
EP (1) | EP1189854A1 (de) |
JP (1) | JP2002543031A (de) |
AU (1) | AU4751500A (de) |
DE (1) | DE10020291A1 (de) |
WO (1) | WO2000064840A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011135262A1 (fr) * | 2010-04-29 | 2011-11-03 | Sme | Compose pyrotechnique generateur de gaz; procede d'obtention. |
EP2360134A3 (de) * | 2005-04-05 | 2012-09-19 | General Dynamics Ordnance and Tactical Systems - Canada Inc. | Nichttoxische, schwermetallfreie zinkperoxidhaltige IR-Tracer-Zusammensetzungen und IR-Tracer-Projektile damit zur Erzeugung einer schwach sichtbaren IR-Spur |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004224617A (ja) * | 2003-01-21 | 2004-08-12 | Nippon Koki Co Ltd | 微細粒子から成る凝集体粒子の化合火薬類、及びこの化合火薬類の製造方法 |
US7985311B2 (en) * | 2005-04-05 | 2011-07-26 | General Dynamics Ordnance And Tactical Systems - Canada Inc. | Non-toxic heavy-metal free-zinc peroxide-containing IR tracer compositions and IR tracer projectiles containing same for generating a dim visibility IR trace |
DE102005047715A1 (de) * | 2005-09-27 | 2007-03-29 | Ipc Process-Center Gmbh & Co. | Granulat mit einer als Oxidationsmittel einsetzbaren anorganischen Verbindung und Verfahren zu seiner Herstellung sowie seine Verwendung |
DE102010049765A1 (de) | 2010-10-29 | 2012-05-03 | Trw Airbag Systems Gmbh | Verfahren zur Herstellung von Festtreibstofftabletten, Gasgenerator und Modul mit Gasgenerator |
DE102012024799A1 (de) * | 2012-12-19 | 2014-06-26 | Trw Airbag Systems Gmbh | Gepresstes Treibladungselement, Verfahren zu dessen Herstellung und Gasgenerator mit Treibladungselement |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2988438A (en) * | 1957-04-04 | 1961-06-13 | Olin Mathieson | Combustible compositions |
US4246051A (en) * | 1978-09-15 | 1981-01-20 | Allied Chemical Corporation | Pyrotechnic coating composition |
DE3933554C1 (en) * | 1989-10-07 | 1990-11-15 | Bayern-Chemie Gesellschaft Fuer Flugchemische Antriebe Mbh, 8261 Aschau, De | Propellant charge for air bag gas generator - is partially covered by sheath of borate, aluminate or silica |
DE4116877A1 (de) * | 1991-05-23 | 1992-11-26 | Diehl Gmbh & Co | Verfahren zur herstellung eines gaserzeugenden satzes fuer einen airbag |
EP0543026A1 (de) * | 1991-05-28 | 1993-05-26 | Daicel Chemical Industries, Ltd. | Gaserzeugungsmittel |
DE4412871A1 (de) * | 1993-04-15 | 1994-10-20 | Nof Corp | Zusammensetzungen für Gasgeneratoren |
EP0665138A2 (de) * | 1993-12-28 | 1995-08-02 | Sensor Technology Co., Ltd. | Gasgenerator, Sprengkapsel für einen Airbag und sebstzündbare Sprengstoffzusammensetzung |
DE4423088A1 (de) * | 1994-07-01 | 1996-01-04 | Temic Bayern Chem Airbag Gmbh | Gaserzeugendes, azidfreies Stoffgemisch |
WO1996022954A1 (en) * | 1995-01-26 | 1996-08-01 | Thiokol Corporation | Methods of preparing gas generant formulations |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4214438A (en) * | 1978-02-03 | 1980-07-29 | Allied Chemical Corporation | Pyrotechnic composition and method of inflating an inflatable device |
US4997496A (en) * | 1989-06-13 | 1991-03-05 | Hoffmann-La Roche Inc. | Explosive and propellant composition and method |
US5125684A (en) * | 1991-10-15 | 1992-06-30 | Hercules Incorporated | Extrudable gas generating propellants, method and apparatus |
US5449423A (en) * | 1992-10-13 | 1995-09-12 | Cioffe; Anthony | Propellant and explosive composition |
-
2000
- 2000-04-26 US US10/030,007 patent/US6969433B1/en not_active Expired - Fee Related
- 2000-04-26 WO PCT/EP2000/003696 patent/WO2000064840A1/de not_active Application Discontinuation
- 2000-04-26 DE DE10020291A patent/DE10020291A1/de not_active Withdrawn
- 2000-04-26 AU AU47515/00A patent/AU4751500A/en not_active Abandoned
- 2000-04-26 EP EP00929423A patent/EP1189854A1/de not_active Ceased
- 2000-04-26 JP JP2000613794A patent/JP2002543031A/ja not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2988438A (en) * | 1957-04-04 | 1961-06-13 | Olin Mathieson | Combustible compositions |
US4246051A (en) * | 1978-09-15 | 1981-01-20 | Allied Chemical Corporation | Pyrotechnic coating composition |
DE3933554C1 (en) * | 1989-10-07 | 1990-11-15 | Bayern-Chemie Gesellschaft Fuer Flugchemische Antriebe Mbh, 8261 Aschau, De | Propellant charge for air bag gas generator - is partially covered by sheath of borate, aluminate or silica |
DE4116877A1 (de) * | 1991-05-23 | 1992-11-26 | Diehl Gmbh & Co | Verfahren zur herstellung eines gaserzeugenden satzes fuer einen airbag |
EP0543026A1 (de) * | 1991-05-28 | 1993-05-26 | Daicel Chemical Industries, Ltd. | Gaserzeugungsmittel |
DE4412871A1 (de) * | 1993-04-15 | 1994-10-20 | Nof Corp | Zusammensetzungen für Gasgeneratoren |
EP0665138A2 (de) * | 1993-12-28 | 1995-08-02 | Sensor Technology Co., Ltd. | Gasgenerator, Sprengkapsel für einen Airbag und sebstzündbare Sprengstoffzusammensetzung |
DE4423088A1 (de) * | 1994-07-01 | 1996-01-04 | Temic Bayern Chem Airbag Gmbh | Gaserzeugendes, azidfreies Stoffgemisch |
WO1996022954A1 (en) * | 1995-01-26 | 1996-08-01 | Thiokol Corporation | Methods of preparing gas generant formulations |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2360134A3 (de) * | 2005-04-05 | 2012-09-19 | General Dynamics Ordnance and Tactical Systems - Canada Inc. | Nichttoxische, schwermetallfreie zinkperoxidhaltige IR-Tracer-Zusammensetzungen und IR-Tracer-Projektile damit zur Erzeugung einer schwach sichtbaren IR-Spur |
WO2011135262A1 (fr) * | 2010-04-29 | 2011-11-03 | Sme | Compose pyrotechnique generateur de gaz; procede d'obtention. |
FR2959508A1 (fr) * | 2010-04-29 | 2011-11-04 | Snpe Materiaux Energetiques | Compose pyrotechnique generateur de gaz; procede d'obtention |
Also Published As
Publication number | Publication date |
---|---|
US6969433B1 (en) | 2005-11-29 |
DE10020291A1 (de) | 2000-11-02 |
AU4751500A (en) | 2000-11-10 |
EP1189854A1 (de) | 2002-03-27 |
JP2002543031A (ja) | 2002-12-17 |
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