EP3558900A1 - Objets solides pyrotechniques générateurs de gaz - Google Patents
Objets solides pyrotechniques générateurs de gazInfo
- Publication number
- EP3558900A1 EP3558900A1 EP17829259.5A EP17829259A EP3558900A1 EP 3558900 A1 EP3558900 A1 EP 3558900A1 EP 17829259 A EP17829259 A EP 17829259A EP 3558900 A1 EP3558900 A1 EP 3558900A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oxalate
- inorganic
- nitrate
- composition
- object 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.)
- Granted
Links
Classifications
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- 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
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
- C06B21/0066—Shaping the mixture by granulation, e.g. flaking
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- 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
- C06B23/001—Fillers, gelling and thickening agents (e.g. fibres), absorbents for nitroglycerine
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- 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
- C06B23/007—Ballistic modifiers, burning rate catalysts, burning rate depressing agents, e.g. for gas generating
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- 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
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- 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
Definitions
- the present invention relates to new pyrotechnic solid objects gas generators. Said new objects are particularly interesting with regard to their combustion temperature (low), their generation of combustion residues (in small quantities, in agglomerated form) and their obtaining (easy to implement by the dry route). They are suitable for use in gas generators whose architecture is optimized. This optimization is specified below.
- Said pyrotechnic solid state gas generators are particularly suitable for use in motor vehicle occupant protection systems, more particularly for inflating the so-called “airbags” (frontal airbags).
- airbags airbag cushioning systems
- front airbags driver or passenger
- side airbags curtain, chest protection
- the front airbags differ from the side airbags mainly in the time required for deployment and placement of the airbag. Typically, this time is higher for a front airbag (of the order of 40-50 ms, against 10-20 ms for a side airbag).
- the front airbags essentially use so-called fully pyrotechnic gas generators, including at least one pyrotechnic charge consisting of at least one pyrotechnic solid object.
- This type of design requires in return that said at least one pyrotechnic solid object jointly satisfies numerous requirements. (relating to its gas yield, its surface flow rate of inflation, its ignitability, its temperature and rate of combustion, its pressure exponent, the non-toxicity of the gases generated by its combustion, the amount of solid particles generated by its combustion and pyrotechnic safety during its obtaining and its use).
- US Pat. No. 6,361,630 discloses, in bases of the guanidine nitrate type (NG, 15 to 35% by weight, as reducing filler) + strontium nitrate (Sr (NO 3 ) 2 , 30 to 50% by weight, such as oxidizing charge), the use, in a relatively large amount (15 to 25% by weight) of an endothermic agent (cooling agent), chosen from alkali or alkaline earth metal formates, alkali metal or alkaline oxalates -terreux and their mixtures.
- an endothermic agent chosen from alkali or alkaline earth metal formates, alkali metal or alkaline oxalates -terreux and their mixtures.
- US Pat. No. 6,602,365 discloses obtaining, (at least partially) wet, pyrotechnic solid objects gas generators having a composition which contains:
- an oxidant such as basic copper nitrate (BCN)
- BCN basic copper nitrate
- NG guanidine nitrate
- pyrotechnic solid objects that seem to offer the best compromise in reference to the many requirements to be satisfied (see above) contain, in their composition, as main ingredients, guanidine nitrate (NG; reducing charge) and basic copper nitrate (BCN as an oxidizing charge). Their composition (NG / BCN type, therefore) is also likely to contain at least one additive, acting on the agglomeration of combustion residues and / or, advantageously, and on the rate of combustion.
- NG guanidine nitrate
- BCN basic copper nitrate
- NG / BCN objects of this type containing, in their composition, at least one inorganic titanate whose melting temperature is greater than 2100 K.
- Said at least one inorganic titanate, present at a low mass level ( ⁇ 5%), has a dual function:
- said at least one inorganic titanate is a refractory compound whose melting point (see above) is significantly greater than the base combustion temperatures (NG / NCB) in which It is thus present that it retains its physical state as a powdery solid (it obviously intervenes in this form) at the combustion temperature, a characteristic necessary to obtain an agglomeration effect of liquid copper residues (at an increase the viscosity of the condensed phase consisting of liquid copper.)
- the flltrabilite combustion residues thus facilitated, it is possible to reduce the filtration systems of gas generators); and, it has a positive effect on the rate of combustion (the articles containing the at least one inorganic titanate in their composition simultaneously have a high combustion rate (> 20 mm / s at 20 MPa) and a moderate combustion temperature ( ⁇ 2200 K) , with low pressure exponent and non-zero combustion and self-sustaining at atmospheric pressure).
- the Applicant has in fact considered the technical problem of the size and mass (and therefore the cost) of gas generators operating with pyrotechnic solid loading gas generator. It wished to optimize the architecture of said generators by minimizing the volume and mass of the devices required, within the structure of said generators, for filtering and cooling the generated combustion gases. It can be indicated for illustration that the mass of the filtering device used, for a gas generating composition whose combustion temperature is 1900 K, is generally equivalent to the mass of the gas-generating charge. For all practical purposes, it can also be specified that the filtration device perse a cooling device (which combines its cooling effect with that of the cooling device).
- the Applicant proposes new solid pyrotechnic gas-generating objects, having a composition of NG / BCN type, which can be obtained by the dry route, without the presence of a binder in their composition, and whose combustion temperature (less than 1800 K) is lower than that (less than 2200 K) of the objects described in the patent application WO 2012/153062.
- Said combustion temperature is lowered by the presence, within the composition of the objects, of at least one specific cooling agent (see below); said presence of said at least one specific cooling agent in a relatively limited quantity ( ⁇ 18% by weight, in particular ⁇ 15% by weight mass, and even ⁇ 13% by mass), within a specific base (see its composition specified hereinafter), being effective (with regard to the lowering of the combustion temperature) while inducing that effects limited on other parameters such as the rate of combustion (the presence of an explosive ingredient is not required), the gas yield and the temperature stability of the objects involved.
- the present invention thus relates to pyrotechnic solid objects generating gas.
- the composition of said objects expressed in percentages by weight, contains:
- NG guanidine nitrate
- BCN basic copper nitrate
- At least one inorganic oxalate selected from sodium oxalate (Na 2 C 2 04), tin oxalate (SnC 2 0 4), strontium oxalate (SRC 2 0 4 ), iron oxalate (FeC 2 O 4 ), copper oxalate (CUC 2 O 4 ) and mixtures thereof;
- composition being, moreover, free of binder and explosive ingredient.
- Said composition is therefore of NG type (reducing charge) / BCN (oxidizing charge).
- Guanidine nitrate (NG) has been retained as reducing agent, among other things, for its ability to generate a lot of gas, for its rheoplastic behavior adapted to the implementation of the (direct) pelletization phase or compaction phases. and pelletization of a dry process (its presence allows in particular a good densification of the starting powdery pyrotechnic composition while limiting the compressive force to be applied: see below), and for reasons of pyrotechnic safety.
- the composition of the pyrotechnic articles of the invention contains from 35 to 50% by weight of guanidine nitrate (NG), advantageously from 40 to 50% by weight of guanidine nitrate (NG).
- Basic copper nitrate has been chosen as an oxidant, especially for its impact on the rate of combustion, its ductility and slaggant effect (presence of copper).
- the said basic copper nitrate is present in a proportion of 35 to 50% by weight, generally in the proportion of 35 to 45% by weight.
- Said composition therefore contains, in a base of NG / BCN type (as specified above, with particular reference to the desired oxygen balance value, close to -3%), a small amount (from 0.5 to 6%). %, often from 1 to 6%, advantageously from 3 to 5%, by weight) of at least one compound chosen from alumina (Al 2 O 3), inorganic titanates having a melting point greater than 2100 K and mixtures thereof .
- alumina has a slaggant power greater than that of titanates
- Said composition advantageously contains alumina (Al 2 O 3) or at least one titanate as specified above. It contains very advantageously alumina (Al2O3) or such a titanate.
- Said composition of the objects of the invention contains, in a base of NG / BCN type as specified above, in addition to said at least one inorganic titanate and / or alumina, a relatively limited amount (from 5 to 18%, especially from 5 to 15%, advantageously from 5 to 13%, very advantageously from 7 to 13%, by weight) of at least one specific cooling agent, ie of at least one inorganic oxalate chosen from from sodium oxalate (Na2C20 4), tin oxalate (SnC 2 0 4), strontium oxalate (SRC 2 0 4), iron oxalate (FeC2 ⁇ 4) oxalate copper (CUC2O4) and mixtures thereof.
- a relatively limited amount from 5 to 18%, especially from 5 to 15%, advantageously from 5 to 13%, very advantageously from 7 to 13%, by weight
- at least one specific cooling agent ie of at least one inorganic oxalate chosen from from sodium
- the presence, within the specified NG / NCB base (containing said at least one inorganic titanate and / or alumina), of at least one such oxalate, in said relatively limited amount indicated, was proved timely, with reference to the lowering of the combustion temperature of objects, without inducing significant effects on other parameters such as the burning rate (the presence of an explosive ingredient is not required), the gas yield (the oxalates were preferred to the formates) and the stabilities in the time (the selected oxalates being little hygroscopic) and in temperature (the melting temperature and / or decomposition of the retained oxalates is not lower than 200 ° C. (the those skilled in the art understood that said retained oxalates are in anhydrous form)) said objects.
- the selected oxalates are otherwise non-toxic and of reasonable cost.
- Said composition of the objects of the invention does not contain a binder.
- NG guanidine nitrate
- the rheoplastic behavior of guanidine nitrate (NG) entering in a significant amount in said composition, makes the presence of any binder superfluous (especially for obtaining, by dry route, formed pyrotechnic objects, granules, pellets and compressed monolith blocks (see below)).
- NG guanidine nitrate
- the person skilled in the art conceives the advantage of being able to obtain, by the dry route, the objects of the invention without the intervention of a binder (which would have a significant impact on the oxygen balance of the composition); the absence of any binder is also particularly appropriate with reference to the objective of low combustion temperature and high gas yield of said objects.
- Said composition of the objects of the invention does not contain any explosive ingredient. It contains neither nitroguanidine nor hexogen (RDX), neither octogen (HMX) ... It is meant, currently and conventionally, by explosive ingredient, the ingredients classified in division of risk 1.1 according to standard NF T 70-502 (see also UN - Recommendations on Transport Dangerous Goods - Manual of Tests and Criteria, Fourth Revised Edition, ST / SG / AC.10 / ll / Rev.4, ISBN 92-1-239083-8ISSN 1014-7179 and STANAG 4488). For all intents and purposes, it is recalled that guanidine nitrate (NG) is not an ingredient in this risk division.
- NG guanidine nitrate
- the absence of any explosive ingredient within the composition of the objects of the invention is particularly appropriate with reference to the safety and the combustion temperature of said objects. It is recalled incidentally that a low combustion temperature is sought.
- the at least one inorganic oxalate present in the composition of the subjects of the invention is advantageously chosen from sodium oxalate (Na 2 C 2 O 4 ), strontium oxalate (SrC 2 O 4 ) and oxalate of copper (CuC 2 O 4 ).
- the at least one inorganic titanate whose melting temperature is greater than 2100 K, possibly present in the composition of the objects of the invention (it is recalled for all purposes that said composition contains from 0.5 to 6%, often from 1 to 6%, advantageously from 3 to 5%, of at least one compound chosen from alumina ( Al 2 O 3), inorganic titanates having a melting point greater than 2100 K and mixtures thereof), is advantageously chosen from metal titanates, alkaline earth titanates and mixtures thereof. It very advantageously consists of a metallic titanate or an alkaline earth titanate.
- the composition of the objects of the invention which contains at least one titanate as specified, contains strontium titanate (SrTiO 3 ) and / or calcium titanate (CaTiO 3 ) and / or titanate. aluminum (AI2T1O5). In a particularly preferred manner, it contains strontium titanate (SrTiO 3), calcium titanate (CaTiOs) or aluminum titanate (Al 2 TiO 5 ).
- titanates respectively have melting temperatures of 2353 K, 2248 K and 2133 K, ie melting temperatures significantly higher than the combustion temperature of the NG / BCN base (the combustion temperature of any NG / BCN base being in fact always less than 1950 K), which in addition contains the at least one inorganic oxalate.
- the present invention relates to the subfamily of gas-generating pyrotechnic solid objects whose composition, expressed in percentages by weight, contains:
- NG guanidine nitrate
- BCN basic copper nitrate
- BCN basic copper nitrate
- composition being, moreover, free of binder and explosive ingredient.
- the at least one inorganic oxalate advantageously consists of sodium oxalate.
- the ingredients of the above four types (guanidine nitrate (NG), basic copper nitrate (BCN), inorganic alumina and / or titanate (s) with a melting point higher than 2100 K, and oxalate ( s) inorganic (s), as specified) (ingredients constituting the objects of the invention in general and subfamily above in particular) generally represent at least 98% by weight of the composition pyrotechnic objects of the invention.
- the ingredients of the four types above may well represent at least 99.5% by weight, or even 100% by weight of the total mass of the objects of the invention.
- At least one "other" additive alumina and / or the at least one inorganic titanate as well as the at least one inorganic oxalate that can quite be assimilated to additives
- at least one "other" additive alumina and / or the at least one inorganic titanate as well as the at least one inorganic oxalate that can quite be assimilated to additives
- auxiliaries calcium stearate, graphite, silica in particular
- the constituent (main) ingredients of the objects of the invention guanidine nitrate + basic copper nitrate + alumina and / or at least one inorganic titanate as specified + at least one oxalate inorganic as specified - are known products. They are in the form of powders whose particle size distribution is narrowed (around their median diameter (d 5 o)) - Throughout this text (including in the examples), the median diameters indicated are median diameters in volume.
- Said constitutive ingredients (main) of the objects of the invention advantageously have, particularly with reference to the obtaining of said objects by the dry route and the combustion rate of said objects, a fine particle size, or very thin. They generally have median diameter values (d 5 o) of less than or equal to 20 ⁇ m.
- the median diameter of one of said guanidine nitrate (NG) and basic copper nitrate (BCN) is substantially higher than the median diameter of the other of said guanidine nitrate (NG) and basic copper nitrate (BCN), said substantially higher (significantly) median diameter remaining generally less than or equal to 20 pm (see above).
- substantially higher is meant “at least 1.8 times higher”, advantageously “at least twice as much”, very advantageously “at least 5 times higher”, or even “at least 10 times higher”.
- the median diameter of one of said basic ammonium nitrate and guanidine nitrate is less than or equal to 1 ⁇ m while the median diameter of the other of said nitrate of copper is guanidine and basic nitrate of copper, for example, that of said guanidine nitrate, is at least 5 pm, advantageously at least 10 pm (while remaining generally less than or equal to 20 pm (see above)).
- alumina also occurring in the pulverulent state
- it is advantageously at a fine or very fine particle size; it then has a high specific surface, or very high.
- median diameter values of less than or equal to 20 ⁇ m have been mentioned.
- median diameter values generally less than or equal to 10 ⁇ m, advantageously less than or equal to 5 ⁇ m, very advantageously less than or equal to 1 ⁇ m, or even as low as 100 nm, and even 10 nm.
- At least one inorganic titanate (also involved in the pulverulent state) is present, it is also advantageously at a smallest possible particle size.
- said at least one inorganic titanate present is in a fine powder form, of micrometric size, or even of nanometric dimension, ie with a median diameter (d 5 o) of less than 6 pm, or even less than 1 pm (generally in the context of this advantageous variant, there is: 0.5 pm d d 5 ⁇ 6 ⁇ m).
- Said at least one inorganic titanate present advantageously has a specific surface area greater than 1 m 2 / g (very advantageously greater than 5 m 2 / g or more).
- the particle size of the at least one inorganic oxalate it is also opportunely the finest possible.
- good results have been obtained with commercial products "large particle size", especially with sodium oxalate having a median diameter greater than 40 prn (60 pm in particular). No doubt that the good results obtained would be even better with (at least) an oxalate of the invention, thinner (having in particular a median diameter less than 20 pm (see above)).
- the objects of the invention are in particular likely to exist in the form of pyrotechnic objects formed, granules, pellets or monolithic (compressed) blocks (see below).
- the pyrotechnic solid objects of the invention can be manufactured (dry) by simply pelletizing (pressing) the powder mixtures obtained by mixing their constituent ingredients (it is understood that said ingredients are used in powder form, with particle size more or less fine, appropriately the finest possible (see above), and it is essentially, if not exclusively, NG, BCN, alumina and / or inorganic titanate (s) such (s) ) as specified, and oxalate (s) as specified).
- the pyrotechnic objects of the invention may also be manufactured (dry) in a process that may include up to four main steps. Such a method is familiar to those skilled in the art. It has in particular been described in patent application WO 2006/134311. Alumina or (and) the at least one inorganic titanate (whose melting temperature is greater than 2100 K) and the at least one inorganic oxalate (selected from sodium oxalate, tin oxalate, strontium oxalate, iron oxalate, copper oxalate and mixtures thereof) are advantageously involved with the other constituent ingredients, mainly NG + BCN, or even NG + BCN, at the beginning of the manufacturing process.
- Alumina or (and) the at least one inorganic titanate (whose melting temperature is greater than 2100 K) and the at least one inorganic oxalate selected from sodium oxalate, tin oxalate, strontium oxalate, iron oxalate,
- said at least one inorganic titanate and at least one inorganic oxalate selected from sodium oxalate, tin oxalate, strontium oxalate, iron oxalate, copper oxalate and mixtures thereof, in particular said at least one inorganic oxalate, added (s), further downstream, in the method of manufacturing the objects of the invention.
- the preferred dry method of manufacture (preparation) of the pyrotechnic objects of the invention includes a dry compaction step of a mixture of the constituent powder ingredients of said objects (except, optionally, said at least one inorganic oxalate which may be added later). Dry compaction is generally carried out, in a manner known per se, in a roller compactor, at a compacting pressure (p) of between 10 8 and 6.10 8 Pa (10 8 Pa ⁇ p ⁇ 6.10 8 Pa). It can be implemented according to different variants (with a "simple" compacting characteristic step followed by at least one complementary step or with a compacting characteristic step coupled to a shaping step). Thus, the pyrotechnic solid objects of the invention are likely to exist in different forms (in particular over the manufacturing process leading to final objects):
- pellets or monolithic blocks are obtained.
- the objects of the invention - pyrotechnic objects formed, granules, pellets and monolithic blocks - obtained at the end of one or the other of the steps specified above, it being understood that pellets can also be obtained. by direct pelleting (see above).
- the pyrotechnic solid objects of the invention can also be obtained by a wet process.
- a wet process includes 1) an aqueous solution stage of all or (usually rather) of some of the main ingredients (said aqueous solution stage generally comprises the dissolution of at least one of the main ingredients (and more particularly that of guanidine nitrate (NG))), 2) the obtaining of a powder by spray drying, 3) the addition to the powder obtained of the ingredient or ingredients which have not not 4) the shaping (in the form of objects) of the powder mixture obtained by the usual dry process methods.
- NG guanidine nitrate
- the objects of the invention advantageously exist in the form of granules, pellets or monolithic blocks.
- the granules of the invention generally have a median diameter (d 50 ) of between 200 and 1000 ⁇ m (and an apparent density of between 0.8 and 1.2 g / cm 3 ); and
- pellets of the invention generally have a thickness of between 1 and 6 mm for a diameter of 3 to 15 mm.
- Said granules and pellets are perfectly suitable for the main intended application (that of the front airbags, in the field of automotive safety).
- the pyrotechnic objects formed and monolithic blocks are intended for other uses.
- the present invention relates to a pulverulent composition (mixture of powders), a precursor of an object of the invention, the composition of which corresponds to that of an object of the invention (see above ).
- the present invention relates to gas generators containing a pyrotechnic solid charge gas generator; said load containing at least one pyrotechnic solid object of the invention.
- Said generators, in particular loaded pellets of the invention, are ideal for airbags, including frontal (see above).
- Pellets (pellets of diameter 11 mm and thickness 3 mm) were made from the following ingredients: - NG (marketed by AlzChem AG (DE), grade 10 - 14 pm), (d 50 "12 pm)
- AI2O3 (marketed by Evonik Industries AG (DE), grade 10-100 nm), (specific surface area: 100 m 2 / g),
- Table 1 below shows five examples (Ex.l, Ex.2, Ex.3, Ex.4 and Ex.5) of object composition (pellets) of the present invention, as well as the characteristics (calculated performances or measured) of said objects (pellets) compared with those of an object (pellet) of the prior art (Ref.l, according to the patent application WO 2012/153062); said objects (pellets) of the invention and the prior art having been manufactured from the above ingredients as indicated above.
- Table 1 below also shows two other examples (eg A and Ref 2) of pellet composition as well as the performance of said pellets (similarly obtained). These examples highlight the advantage of using NCB of very fine particle size (with NG of substantially greater particle size).
- pellets were evaluated by means of thermodynamic calculations and from physical measurements carried out on the lozenges.
- the combustion rates and pressure exponents of said pellets were obtained following several shots in a manometric chamber (volume 40 cm 3 ). The values indicated are therefore average values.
- the reference pellets of the prior art contained, in their composition, guanidine nitrate (NG), basic copper nitrate (BCN) and strontium titanate (SrTiOs), in the indicated mass percentages. .
- the pellets of Examples 1 to 5 contained, in their composition, in addition to the three constituents guanidine nitrate (NG), basic nitrate of copper (BCN) and strontium titanate (SrTiOa) for Examples 1 and 2, alumina for Examples 3, 4 and 5, a lowering agent for the combustion temperature according to the present invention: sodium oxalate (Na 2 C 2 O 4 ) for Examples 1 to 3, strontium oxalate (SrC 2 O 4 ) for Example 4 and copper oxalate (CuC 2 O 4 ) for Example 5.
- the four components were present in the compositions in the percentages indicated.
- compositions (objects) of Examples 1 and 2 showed that the addition, at a variable rate (mass content of 7.5 and 10% respectively), of sodium oxalate (Na 2 C 2 0 4 ), in a composition of the type of reference 1 (Ref.1), led to a lowering of the significant combustion temperature (respectively -144 and -190 ° C). The value of the pressure exponent remained acceptable for the intended application (front airbags).
- the characteristics (performance) of the composition (of the object) of Example 3 showed that the presence of alumina contributed to obtaining good performance (lowering of the combustion temperature (of -155 ° C. relative to in the example of Ref.l) with increase of the value of the combustion rate to 20 MPa by compared to Example 2, and parallel increase in the agglomeration quality of the combustion residues compared to Example 2).
- Example 5 (object) of Example 5 have shown that the joint addition of alumina and copper oxalate (CUC2O4) in a composition of the type of reference 1 (Ref.1), has led to a lowering of the significant combustion temperature (-146 ° C).
- CRC2O4 alumina and copper oxalate
- BCN fine-grade copper basic nitrate
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Inorganic Chemistry (AREA)
- Air Bags (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1663229A FR3061174B1 (fr) | 2016-12-22 | 2016-12-22 | Objets solides pyrotechniques generateurs de gaz |
| PCT/FR2017/053727 WO2018115735A1 (fr) | 2016-12-22 | 2017-12-20 | Objets solides pyrotechniques générateurs de gaz |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP3558900A1 true EP3558900A1 (fr) | 2019-10-30 |
| EP3558900B1 EP3558900B1 (fr) | 2021-11-17 |
| EP3558900B8 EP3558900B8 (fr) | 2021-12-29 |
Family
ID=59296880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17829259.5A Active EP3558900B8 (fr) | 2016-12-22 | 2017-12-20 | Objets solides pyrotechniques générateurs de gaz |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20200002243A1 (fr) |
| EP (1) | EP3558900B8 (fr) |
| JP (1) | JP2020514218A (fr) |
| KR (1) | KR20190101995A (fr) |
| CN (1) | CN110325492A (fr) |
| FR (1) | FR3061174B1 (fr) |
| WO (1) | WO2018115735A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978136B (zh) * | 2020-09-01 | 2021-11-23 | 湖北航天化学技术研究所 | 一种改进的气体发生剂及其制备方法 |
| JP7811444B2 (ja) * | 2020-10-01 | 2026-02-05 | 株式会社ダイセル | ガス発生剤組成物 |
| US20240002311A1 (en) * | 2020-10-01 | 2024-01-04 | Daicel Corporation | Gas-generating agent composition |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6361630B2 (en) * | 1999-08-17 | 2002-03-26 | Trw Inc. | Cool burning gas generating composition |
| US6602365B1 (en) | 2000-11-17 | 2003-08-05 | Autoliv Asp, Inc. | Gas generation via metal complexes of guanylurea nitrate |
| US6589375B2 (en) * | 2001-03-02 | 2003-07-08 | Talley Defense Systems, Inc. | Low solids gas generant having a low flame temperature |
| FR2866022B1 (fr) * | 2004-02-10 | 2006-07-28 | Snpe Materiaux Energetiques | Composition pyrotechnique generatrice de gaz destinee a la securite automobile |
| CN1331827C (zh) * | 2004-12-16 | 2007-08-15 | 中国航天科技集团公司第四研究院第四十二研究所 | 非叠氮气体发生剂及制造工艺 |
| FR2887247B1 (fr) | 2005-06-15 | 2007-10-12 | Snpe Materiaux Energetiques | Procede de fabrication de pastilles generatrices de gaz comportant une etape de granulation par voie seche |
| JP5275862B2 (ja) * | 2008-04-11 | 2013-08-28 | 株式会社ダイセル | ガス発生剤組成物 |
| FR2975097B1 (fr) * | 2011-05-09 | 2015-11-20 | Sme | Composes pyrotechniques generateurs de gaz |
| CN104744185B (zh) * | 2013-12-30 | 2017-11-17 | 比亚迪股份有限公司 | 一种气体发生剂组合物及其制备方法 |
-
2016
- 2016-12-22 FR FR1663229A patent/FR3061174B1/fr active Active
-
2017
- 2017-12-20 JP JP2019534212A patent/JP2020514218A/ja active Pending
- 2017-12-20 US US16/472,297 patent/US20200002243A1/en not_active Abandoned
- 2017-12-20 KR KR1020197019861A patent/KR20190101995A/ko not_active Withdrawn
- 2017-12-20 CN CN201780087086.8A patent/CN110325492A/zh active Pending
- 2017-12-20 EP EP17829259.5A patent/EP3558900B8/fr active Active
- 2017-12-20 WO PCT/FR2017/053727 patent/WO2018115735A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018115735A1 (fr) | 2018-06-28 |
| KR20190101995A (ko) | 2019-09-02 |
| EP3558900B1 (fr) | 2021-11-17 |
| FR3061174B1 (fr) | 2019-05-31 |
| JP2020514218A (ja) | 2020-05-21 |
| CN110325492A (zh) | 2019-10-11 |
| FR3061174A1 (fr) | 2018-06-29 |
| EP3558900B8 (fr) | 2021-12-29 |
| US20200002243A1 (en) | 2020-01-02 |
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