EP3986575A1 - Composition pyrotechnique génératrice de gaz - Google Patents
Composition pyrotechnique génératrice de gazInfo
- Publication number
- EP3986575A1 EP3986575A1 EP20747021.2A EP20747021A EP3986575A1 EP 3986575 A1 EP3986575 A1 EP 3986575A1 EP 20747021 A EP20747021 A EP 20747021A EP 3986575 A1 EP3986575 A1 EP 3986575A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- agent
- present
- mass content
- composition
- composition according
- 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.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
- A62C13/02—Portable extinguishers which are permanently pressurised or pressurised immediately before use with pressure gas produced by chemicals
- A62C13/22—Portable extinguishers which are permanently pressurised or pressurised immediately before use with pressure gas produced by chemicals with incendiary substances producing pressure gas
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C35/00—Permanently-installed equipment
- A62C35/02—Permanently-installed equipment with containers for delivering the extinguishing substance
- A62C35/023—Permanently-installed equipment with containers for delivering the extinguishing substance the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/006—Extinguishants produced by combustion
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/06—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components
-
- 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
- C06B23/04—Compositions characterised by non-explosive or non-thermic constituents for cooling the explosion gases including antifouling and flash suppressing agents
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B31/00—Compositions containing an inorganic nitrogen-oxygen salt
- C06B31/02—Compositions containing an inorganic nitrogen-oxygen salt the salt being an alkali metal or an alkaline earth metal nitrate
-
- 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
Definitions
- the invention relates to a pyrotechnic composition which generates a gas having a low level of condensable species, and having a limited combustion temperature.
- the invention also relates to devices incorporating such a composition.
- shock absorbers for protecting vehicle occupants, or even as a solution for pressurizing an extinguishing agent present in a tank in order to trigger its distribution to a fire zone.
- the invention relates to a pyrotechnic gas-generating composition
- a pyrotechnic gas-generating composition comprising at least:
- an oxidizing agent chosen from alkali metal nitrates, alkaline earth metal nitrates or mixtures thereof, said oxidizing agent being present in a mass content of between 30% and 75%, and
- an endothermic agent chosen from alkali metal oxalates, alkaline earth metal oxalates, transition metal oxalates or mixtures thereof, said endothermic agent being present in a mass content of between 10% and 50%.
- the pyrotechnic composition according to the invention has, during its combustion, a satisfactory gas yield and the maintenance of a high gas pressure over time due to a reduced generation of condensable species and a limited combustion temperature.
- the constituents of this pyrotechnic composition have a limited quantity of hydrogen, which makes it possible to reduce the formation of water which constitutes a condensable species, and a high quantity of nitrogen and oxygen which makes it possible to maintain a satisfactory gas yield.
- the 5-AT which forms the reducing agent has a high nitrogen content and a low hydrogen content, thus making it possible to reduce the amount of condensable species generated compared to the use of other agents such as nitrate. guanidine for example.
- the endothermic agent for its part, makes it possible to reduce the combustion temperature of the pyrotechnic composition in order to limit the effects of pressure loss linked to a drop in temperature.
- the oxidizing agent is chosen from strontium nitrate, sodium nitrate or their mixtures.
- the oxidizing agent can be strontium nitrate.
- Strontium nitrate advantageously makes it possible to avoid any risk of forming caustic species such as NaO or NaOH which can eventually corrode the device in which the pyrotechnic composition is used.
- the endothermic agent is chosen from sodium oxalate, strontium oxalate, copper oxalate or their mixtures.
- the endothermic agent can be sodium oxalate.
- Sodium oxalate has a particularly high endothermic power and therefore makes it possible to particularly lower the combustion temperature of the pyrotechnic composition.
- said composition further comprises an agglomerating agent present in a mass content of between 1% and 6%.
- agglomerating agent also designated by the expression “slaggant agent” in the literature, helps to agglomerate the residues generated during combustion. and to retain the latter. This makes it possible in particular to avoid any risk of the diffusion of combustion residues disturbing the process and to simplify the solution by making the use of a filter superfluous.
- the agglomerating agent is distinct from each of the reducing agent, the oxidizing agent and the endothermic agent.
- the agglomerating agent can be chosen from alumina, an inorganic titanate or their mixtures.
- the pyrotechnic composition is such that:
- the reducing agent is present in a mass content of between 10% and 25%,
- the oxidizing agent is present in a mass content of between 35% and 55%, and
- the endothermic agent is present in a mass content of between 30% and 50%.
- the pyrotechnic composition can be in various forms, for example in the form of a set of grains or pellets, or of a monolithic block.
- the invention also relates to a gas generator comprising a pyrotechnic gas-generating composition as described above, and an initiator capable of initiating the combustion of said composition.
- the invention also relates to an inflation device comprising a gas generator as described above and an object to be inflated defining an interior volume in communication with an outlet of the gas generator.
- the object to be inflated may be a cushioning cushion intended for protection
- the object to be inflated can alternatively be an emergency inflatable object, such as an inflatable slide for the evacuation of passengers from an aircraft.
- the invention also relates to a fire extinguisher comprising a gas generator as described above and a body containing an extinguishing agent, the gas generator being able to pressurize the extinguishing agent so as to cause its distribution. outside the body.
- the fire extinguisher may include a piston configured to move under the effect of the gas generated following the combustion of the pyrotechnic composition and thus to pressurize the extinguishing agent in order to trigger its distribution.
- the gas generated can bubble in the extinguishing agent and thus trigger its
- the inventors evaluated the thermodynamic characteristics of various pyrotechnic compositions using the Orismlie computer code.
- the formulations of the pyrotechnic compositions evaluated and the associated results are provided in the table below.
- composition according to Example 1 corresponds to a composition outside the invention.
- compositions of Examples 2 to 5 correspond to compositions according to
- compositions according to the invention exhibit a lower level of condensable H 2 0 as well as a lower combustion temperature compared to that of Example 1 while retaining a satisfactory gas yield.
- the expression "between ... and " should be understood as including the limits.
Landscapes
- Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Emergency Management (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Combustion & Propulsion (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1906803A FR3097546B1 (fr) | 2019-06-24 | 2019-06-24 | Composition pyrotechnique génératrice de gaz |
| PCT/FR2020/051086 WO2020260817A1 (fr) | 2019-06-24 | 2020-06-23 | Composition pyrotechnique génératrice de gaz |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3986575A1 true EP3986575A1 (fr) | 2022-04-27 |
Family
ID=68211010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20747021.2A Withdrawn EP3986575A1 (fr) | 2019-06-24 | 2020-06-23 | Composition pyrotechnique génératrice de gaz |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20220348520A1 (fr) |
| EP (1) | EP3986575A1 (fr) |
| JP (1) | JP2022538159A (fr) |
| CN (1) | CN114051493A (fr) |
| FR (1) | FR3097546B1 (fr) |
| WO (1) | WO2020260817A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119798016B (zh) * | 2024-12-02 | 2025-10-03 | 南京理工大学 | 一种复合草酸盐改性五氨基四氮唑类产气剂及其制备方法 |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5035757A (en) * | 1990-10-25 | 1991-07-30 | Automotive Systems Laboratory, Inc. | Azide-free gas generant composition with easily filterable combustion products |
| US6033500A (en) * | 1995-07-27 | 2000-03-07 | Sensor Technology Co., Ltd. | Airbag explosive composition and process for producing said composition |
| ATE270261T1 (de) * | 1996-07-20 | 2004-07-15 | Dynamit Nobel Ag | Thermische sicherung |
| DE60043652D1 (de) * | 1999-02-19 | 2010-02-25 | Aerojet General Co | Feuerlöschzusammensetzung und gerät |
| JP2001002488A (ja) * | 1999-06-17 | 2001-01-09 | Daicel Chem Ind Ltd | プリテンショナー用ガス発生剤組成物 |
| US6361630B2 (en) * | 1999-08-17 | 2002-03-26 | Trw Inc. | Cool burning gas generating composition |
| JP4703837B2 (ja) * | 1999-11-26 | 2011-06-15 | ダイセル化学工業株式会社 | ガス発生剤組成物 |
| JP4641130B2 (ja) * | 2000-10-10 | 2011-03-02 | 日本化薬株式会社 | ガス発生剤組成物およびそれを使用したガス発生器 |
| US6589375B2 (en) * | 2001-03-02 | 2003-07-08 | Talley Defense Systems, Inc. | Low solids gas generant having a low flame temperature |
| US6605233B2 (en) * | 2001-03-02 | 2003-08-12 | Talley Defense Systems, Inc. | Gas generant composition with coolant |
| CN100376515C (zh) * | 2005-03-28 | 2008-03-26 | 东方久乐汽车安全气囊有限公司 | 一种产气组合物及其制备方法 |
| JP5275862B2 (ja) * | 2008-04-11 | 2013-08-28 | 株式会社ダイセル | ガス発生剤組成物 |
-
2019
- 2019-06-24 FR FR1906803A patent/FR3097546B1/fr not_active Expired - Fee Related
-
2020
- 2020-06-23 EP EP20747021.2A patent/EP3986575A1/fr not_active Withdrawn
- 2020-06-23 CN CN202080046573.1A patent/CN114051493A/zh active Pending
- 2020-06-23 US US17/621,507 patent/US20220348520A1/en not_active Abandoned
- 2020-06-23 WO PCT/FR2020/051086 patent/WO2020260817A1/fr not_active Ceased
- 2020-06-23 JP JP2021577076A patent/JP2022538159A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN114051493A (zh) | 2022-02-15 |
| WO2020260817A1 (fr) | 2020-12-30 |
| JP2022538159A (ja) | 2022-08-31 |
| FR3097546A1 (fr) | 2020-12-25 |
| FR3097546B1 (fr) | 2021-09-24 |
| US20220348520A1 (en) | 2022-11-03 |
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Legal Events
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