Abstract

The present disclosure provides a gas-generating agent composition, a gas-generating agent, and a preparation method and the use, and belongs to the technical field of automobile airbags. The gas-generating agent composition comprises the following components, in percentages by mass: 30-70% of guanidine nitrate, 20-60% of basic copper nitrate, 0-10% of basic copper carbonate, 1-10% of ammonium perchlorate and 1-15% of a slag-forming agent, wherein the slag-forming agent comprises a first component and a second component, the first component being selected from aluminum hydroxide, and the second component being selected from at least one of a zirconate and a silicate. A tablet of the gas-generating agent composition provided above can maintain the form before combustion well after combustion, improve the hardness of residues, and avoid the situation whereby the tablet is molten and splashed after combustion to burn an air bag; and the synergistic effect thereof can reduce the combustion pressure index of the formulation, thereby rendering the combustion more stable.

IPC Classes  ?

• C06B 23/00 - Compositions characterised by non-explosive or non-thermic constituents
• C06D 5/06 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
• C06B 29/22 - Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate the salt being ammonium perchlorate
• B60R 21/264 - 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

Abstract

Embodiments of the present disclosure provide a gas generating agent composition, a gas generating agent, a preparation method, and a use, and relate to the technical field of automobile airbags. The gas generating agent composition comprises guanidine nitrate that acts as fuel, basic copper nitrate that acts as a main oxidant, and an auxiliary oxidant and slagging agent; the auxiliary oxidant is ammonium perchlorate, and the slagging agent is at least one zirconate; in mass percentage, the content of each component is: 40%-60% of guanidine nitrate; 25%-50% of basic copper nitrate; 0.5%-7% of ammonium perchlorate; and 1%-10% of the slagging agent; the oxygen balance of the gas generating agent composition is 0 to -3%. In the gas generating agent composition, the gas generating agent, the preparation method and the use, by adjusting the formula components and proportion of the gas generating agent, the content of toxic and harmful gases and suspended solids in the air that are generated during combustion meet the limit requirements of USCAR for the content of toxic and harmful gases and suspended solids in the air.

IPC Classes  ?

• C06B 29/16 - Compositions containing an inorganic oxygen-halogen salt, e.g. chlorate, perchlorate of an alkali metal with a nitrated organic compound
• C06B 31/00 - Compositions containing an inorganic nitrogen-oxygen salt
• B60R 21/264 - 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
• B60R 21/26 - 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

Abstract

Disclosed are an ignition powder, a preparation method therefor and a use thereof, and an airbag gas generator, which belong to the technical field of ignition powders. The raw materials of the ignition powder include the following components in percentages by mass: potassium perchlorate. 30%˜50%; basic copper nitrate: 5%˜20%; a fuel: 15%˜60%; a metal oxide: 1%˜25%; and a metal powder: 1%˜25%, wherein the metal powder is at least one of a titanium powder, a magnesium powder, a copper powder, an iron powder, a zirconium powder, a hafnium powder, a tungsten powder or a silicon powder.

IPC Classes  ?

• C06B 33/14 - Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being two or more oxygen-yielding compounds at least one being an inorganic nitrogen-oxygen salt
• C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
• B60R 21/264 - 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

Abstract

Provided are a gas generant composition, a preparation method, and a gas generator containing the composition. The gas generant composition includes components having the following contents, in percent by mass: 40% to 60% of guanidine nitrate, 25% to 50% of basic copper nitrate, 0% to 7% of ammonium perchlorate, 1% to 10% of a slag-forming agent, and 0.05% to 5% of a release agent/lubricant, the slag-forming agent is used as a form-retaining agent, so that the tablets can retain their form before combustion very well after combustion, thereby completely avoiding burning of an inflatable bag due to melting and splashing of the combusted tablets. Moreover, ammonium perchlorate is used as auxiliary oxidizers, thereby reducing the amount of basic cupric nitrate used and reducing molten copper residues. The gas generant composition is mainly used in a gas generator for vehicle airbag.

IPC Classes  ?

• C06D 5/06 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
• B60R 21/264 - 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
• C06B 31/00 - Compositions containing an inorganic nitrogen-oxygen salt

Abstract

Disclosed is a pyrotechnic gas generator for a safety airbag, the pyrotechnic gas generator comprising an upper housing (1), a lower housing (3), an igniter seat (5), an igniter (6), an ignition housing (7), a filter (2), ignition powder (9), and gas generation powder (10). The filter (2) and the upper housing (1) are level in height; the lower housing (3) is of a double-cup structure; the lower housing (3) is provided with a first cup body (3-1) and a second cup body (3-2); the filter (2) is arranged in the first cup body (3-1); an inner surface of the filter constitutes a gas generation powder chamber (4); the upper housing (1) is connected to an opening of the first cup body (3-1) of the lower housing (3); the igniter seat (5) is arranged on the bottom face of the lower housing (3); the igniter (6) is arranged in the igniter seat (5); the ignition housing (7) is connected to the igniter seat (5); the ignition housing (7) is provided with at least one or more fire transmission holes (7-1); and the gas generation powder chamber (4) is internally provided with middle-hole columnar gas generation powder (10) having a radius ratio of a long axis to a short axis greater than 1. The gas generator can improve the filtering efficiency of the filter, and can also reduce an output slope of an initial pressure thereof.

IPC Classes  ?

• B60R 21/264 - 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

Abstract

The present invention relates to a gas generating agent composition and a preparation method therefor, and a gas generator containing the composition. The gas generating agent composition comprises the following components in percentage by mass: 40-60% of guanidine nitrate, 25%-60% of basic copper nitrate, 1%-20% of strontium nitrate, 1%-10% of ammonium perchlorate, 1%-10% of a slag-forming agent, and 0.6%-10% of a release agent/lubricant. The gas generating agent composition uses the slag-forming agent as a form-retaining agent. A tablet can well keep the form after combustion and is prevented from melting and splashing, which may burn an airbag, after combustion; strontium nitrate and ammonium perchlorate are adopted as auxiliary oxidants, the use amount of basic copper nitrate is reduced, molten copper residues are reduced, and the gas generating agent composition is mainly used for an automobile safety airbag gas generator.

IPC Classes  ?

• C06D 5/06 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
• B60R 21/264 - 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

Abstract

The present invention relates to a gas generator. By changing the structure and layout of a filter and the formulation and type of a gas-generating drug to achieve staged combustion, the filtration efficiency of the filter is improved, the initial output voltage gradient of the gas generator is reduced, and a small size, a light weight and a reliable workability of the gas generator are achieved. In addition, by designing the gas generating agent composition formulation, using a zirconate, a silicate or a mixture of a zirconate and a silicate as a slag-forming agent and combining same with the rest of the components, the rest of the tablets, after burning in the filter, can coagulate and agglomerate, the pre-combustion state is well maintained, the melting and splashing of the tablets after burning to burn an air bag are completely avoided, and the slagging during the combustion of the gas generating agent composition is increased by at least 50%.

IPC Classes  ?

• C06D 5/06 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
• B60R 21/264 - 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

Abstract

Disclosed are an ignition powder, a preparation method therefor and a use thereof, and an airbag gas generator, which belong to the technical field of ignition powders. The raw materials of the ignition powder include the following components in percentages by mass: potassium perchlorate. 30% - 50%; copper nitrate basic: 5% - 20%; a fuel: 30% - 60%; a metal oxide: 1% - 15%; and a metal powder: 1% - 15%, wherein the metal powder is at least one of a titanium powder, a magnesium powder, a copper powder, an iron powder, a zirconium powder, a hafnium powder, a tungsten powder or a silicon powder. The ignition powder further improves moisture absorption resistance, and has a stable and reliable ignition performance at a temperature of -40℃ - +90℃. The ignition powder ignites uniformly when a gas generating agent is ignited, same has an improved consistency and a low sensitivity, can be ignited by an ordinary electric detonator, has a combustion rate of 35% BPF of greater than 12, a low friction sensitivity and safe and reliable processes, and is suitable for mass production and preparation. Since the formula does not contain an aluminum powder, potential safety hazards and combustion residues are prevented.

IPC Classes  ?

• C06C 15/00 - Pyrophoric compositionsFlints
• C06B 33/14 - Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being two or more oxygen-yielding compounds at least one being an inorganic nitrogen-oxygen salt
• C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
• C06D 5/00 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
• B60R 21/264 - 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

Abstract

Disclosed are a perforated molded product of a gas producing agent and a preparation process therefor. The external shape of the perforated molded product of a gas producing agent is a cylinder. An internal portion of the cylinder has holes passing or not passing therethrough. The perforated molded product of a gas producing agent can achieve slowing of a regressive burning process, or achieve neutral burning or progressive burning for a period of time during the burning process; and thus achieves a near S-shaped pressure-time curve for the gas generator, wherein at an early stage, the pressure and the slope are low, the airbag suffers less impact and harm, and the airbag expands slowly; at a middle stage, the pressure rises rapidly, and the airbag fills quickly; and at a later stage, the pressure declines gently, thereby extending the maintenance duration of the airbag. The reduction in initial burning surface, the slowing of regressive burning, or the achievement of neutral burning or progressive burning, and a decrease of internal pressure inside the gas generator reduce the material cost and mass of the gas generator. The present invention adopts a compression molding process to prepare the perforated molded product of a gas producing agent by means of compression molding, such that the preparation process is simple, efficient, and easy to operate and control.

IPC Classes  ?

• C06B 31/00 - Compositions containing an inorganic nitrogen-oxygen salt
• C06B 31/12 - Compositions containing an inorganic nitrogen-oxygen salt the salt being an alkali metal or an alkaline earth metal nitrate with a nitrated organic compound
• C06D 5/06 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids

Abstract

The present invention relates to a porous gas-generating agent molded product and a preparation process therefor. The porous gas-generating agent molded product is a columnar body having a plurality of holes arranged in the height direction therein. The ratio of the height to the largest dimension of the cross-section of the columnar body is in a range of 0.3 to 1.8, and the ratio of the total area of the cross-section of a plurality of holes of the columnar body to the total area of the cross-section of the columnar body is in a range of 0.03 to 0.15. The combustion process of the compressed porous gas-generating agent can realize equal-area combustion or progressive combustion, or multiple stages of combustion in different conditions, and can adjust the P-t performance of a gas generator according to requirements, thereby reducing material costs of the gas generator and the quality of the generator. The compressed porous gas-generating agent is mainly used for gas generators for automobile airbag. The present invention uses a compression molding process, and for the first time realizes the use of compression molding to prepare a small porous gas-generating agent, making the preparation process simple, efficient, and easy to operate and control.

IPC Classes  ?

• C06B 45/00 - Compositions or products which are defined by structure or arrangement of component or product
• C06B 31/00 - Compositions containing an inorganic nitrogen-oxygen salt
• C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
• C06D 5/06 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids

Abstract

33 25%-45%; guanidine nitrate 4.5%-15.5%; and graphite 0.1%-10%. The automatic ignition agent provided by the present invention is prepared as follows: by means of employing a specific preparation process, wet-mixing and granulating guanidine nitrate, then mixing same with NTO, sodium nitrate and graphite to prepare an automatic ignition agent having excellent performance. The automatic ignition agent composition has good thermal stability for long-term storage, and is suitable for a long service life in an automobile, which is to say that the automatic ignition agent may be instantly ignited, and reliable ignition is achieved; meanwhile, ignition performance is significantly improved, and the needs for airbags to protect drivers and passengers are met.

IPC Classes  ?

• C06C 15/00 - Pyrophoric compositionsFlints
• C06B 31/12 - Compositions containing an inorganic nitrogen-oxygen salt the salt being an alkali metal or an alkaline earth metal nitrate with a nitrated organic compound
• B60R 21/26 - 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

Abstract

The present invention relates to a gas generating agent composition for reducing combustion temperature and maintaining morphology, a preparation method therefor, an application thereof and a gas generator, the gas generating agent composition comprising the following components in mass percentage: guanidine nitrate 10%-40%; basic copper nitrate 30%-50%; amidinoureacopper nitrate 10%-50%; ammonium perchlorate 1%-10%; aluminum hydroxide 1%-10%; and talc powder 0.1%-10%; the gas generating agent composition uses the amidinoureacopper nitrate as a cooling agent and auxiliary fuel of a formulation to reduce the combustion temperature of the formulation without lowering the combustion rate of the formulation, and provides a sufficient oxygen source for the formulation; in addition, the agent improves the slagging capabilities of the gas generating agent after combustion by means of using large particles of aluminum hydroxide as a slag forming agent; in addition, by means of using ammonium perchlorate as an ignition performance modifier, the low-temperature ignition performance of the composition is significantly improved while the combustion rate is increased. The gas generating agent composition is mainly used in a gas generator of a car airbag.

IPC Classes  ?

• C06B 31/00 - Compositions containing an inorganic nitrogen-oxygen salt
• C06B 31/28 - Compositions containing an inorganic nitrogen-oxygen salt the salt being ammonium nitrate

Abstract

Disclosed is an igniting agent composition having a reliable ignition performance and a preparation method thereof. The igniting agent composition comprises the following components with the following mass percentages: 40% to 60% of cerium nitrate, 25% to 40% of 5-aminotetrazole 5-AT, 1% to 20% of potassium nitrate, 1% to 20% of mica powder, 0.5% to 10% of aluminum oxide, 0.1% to 10% of graphite, and 0.1% to 10% of boron nitride. A tablet of the igniting agent composition does not stick to the mold during a tableting process, and the tablet can maintain the original gloss and morphology after the tableting process. The ignition delay or fluctuation of the igniting agent at a low temperature of -40 °C is improved. The area of effect is greater when the igniting agent acts at a temperature between -40 °C and +90 °C. In addition, the ignition of the igniting agent with a gas generating agent is more uniform, the consistency is better, and the ignition performance is remarkably improved.

IPC Classes  ?

• C06D 5/06 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
• C06B 33/04 - Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being an inorganic nitrogen-oxygen salt
• C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying

Abstract

The present invention relates to a gas generator. The gas generator employs an ignition agent composition comprising the following components at the following mass percentages: 40% to 60% of cerium nitrate, 25% to 40% of 5-aminotetrazole 5-AT, 1% to 20% of potassium nitrate, 1% to 20% of mica powder, 0.5% to 10% of aluminum oxide, 0.1% to 10% of graphite, and 0.1% to 10% of boron nitride. A tablet of the igniting agent composition does not stick to the mold during a tableting process, and the tablet can maintain the original gloss and morphology after the tableting process. The ignition delay or fluctuation of the igniting agent at a low temperature of -40 °C is improved. The area of effect is greater when the igniting agent acts at a temperature between -40 °C and +90 °C. In addition, the ignition of the igniting agent with a gas generating agent is more uniform, the consistency is better, and the ignition performance is remarkably improved. Further, the gas generating agent composition used in the gas generator of the present invention enables the morphology of the tablet before combustion to be well maintained after combustion, such that splashing of the melted tablet after combustion resulting in burning of an airbag is prevented, and the low-temperature ignition performance of the composition and the combustion speed are significantly increased.

IPC Classes  ?

• C06B 33/14 - Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being two or more oxygen-yielding compounds at least one being an inorganic nitrogen-oxygen salt
• C06D 5/00 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets

Abstract

The present invention relates to a gas generating agent composition, a preparation method, an application, and a gas generator. The composition comprises the following components in percentage by mass: 30%-60% of guanidine nitrate, 25%-58% of basic copper nitrate, 5.5%-10% of strontium titanate, and 0.6%-10% of talc powder. According to the gas generating agent composition, the strontium titanate and the talc powder are jointly used as a shape keeping agent, and achieve a synergistic effect, so that the shapes of tablets before combustion can be kept well after the tablets are combusted, and gas bags can be prevented from being burnt due to melting and splashing of the combusted tablets; the composition is prepared by a wet process; the preparation process is simple and easy to implement; the gas generating agent composition is mainly applied to gas generators for supplementary restraint systems of automobiles.

IPC Classes  ?

• C06B 31/00 - Compositions containing an inorganic nitrogen-oxygen salt
• C06B 23/00 - Compositions characterised by non-explosive or non-thermic constituents
• C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
• C06D 5/06 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
• B60R 21/264 - 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

Abstract

The present invention relates to a gas generating agent composition, a preparation method, and a gas generator comprising the composition. The gas generating agent composition comprises the following components in percentage by mass: 40%-60% of guanidine nitrate, 25%-40% of basic copper nitrate, 1%-20% of strontium nitrate, 1%-10% of ammonium perchlorate, 5.5%-10% of strontium titanate, and 0.6%-10% of talc powder. According to the gas generating agent composition, the strontium titanate and the talc powder are jointly used as a shape keeping agent, and achieve a synergistic effect, so that the shapes of tablets before combustion can be kept well after the tablets are combusted, and gas bags can be prevented from being burnt due to melting and splashing of the combusted tablets; the strontium nitrate is used as an auxiliary oxidizing agent, the amount of the basic copper nitrate used is reduced, and molten copper residues can be reduced; in addition, the ammonium perchlorate is used as an ignition performance regulator, so that the low-temperature ignition performance of the composition is obviously improved and the combustion speed is increased; the gas generating agent composition is mainly applied to gas generators for supplementary restraint systems of automobiles.

IPC Classes  ?

• C06B 31/12 - Compositions containing an inorganic nitrogen-oxygen salt the salt being an alkali metal or an alkaline earth metal nitrate with a nitrated organic compound
• C06B 23/00 - Compositions characterised by non-explosive or non-thermic constituents
• C06B 21/00 - Apparatus or methods for working-up explosives, e.g. forming, cutting, drying