JPH11343191A - Gas generating agent composition and gas generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the heat resistance of a gas generating agent by incorporating a gas generating agent, which contains a non-sodium azide system fuel, and an adsorbent which adsorbs and holds a decomposed product generated by decomposing this fuel. SOLUTION: A gas generating agent composition is prepared by combining a gas generating agent contg. a non-sodium azide system fuel (azo dicarbon amide or the like) and an adsorbent (synthetic zeolite or the like) adsorbing and holding a decomposed product (CONH2 radical, NH2 radical, CO, ammonia or the like) generated by decomposition of this fuel. The gas generating agent contains an oxidizing agent (potassium nitrate, potassium chlorate or the like) of about 40-90 wt.% and a binder (starch or the like) of about 0.1-15 wt.% other than the above fuel of 10-60 wt.%. The gas generating agent composition comprises the gas generating agent of about 60-98 wt.% and the adsorbent of about 2-40 wt.%. Reliability of a gas generating device is improved by setting the composition in a combustion chamber for the gas generating agent in the gas generating device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag system for protecting a human body mounted on an automobile, an aircraft, etc., in a gas generating composition having improved heat resistance of a gas generating agent serving as a working gas. About things. The present invention also provides
The present invention relates to a method for using the gas generant composition, a gas generator using the gas generant composition, and an inflator system using the gas generator.

[0002]

2. Description of the Related Art In a current airbag system, a gas generator is stored in a steering wheel of a driver's seat or a dashboard of a passenger seat.
In midsummer, the interior of the car gets quite hot, so the gas generators are also exposed to high temperatures. The life of the car is 10-15
Since it is considered to be years, performance must be guaranteed at least during this period. In order to stabilize the performance of the airbag system under such conditions, it is important not to deteriorate the gas generating agent in the gas generator. If the gas generating agent is degraded by heat or the like, the combustion behavior of the gas generating agent changes, and the deployment behavior of the airbag changes accordingly, thereby impairing the reliability of the airbag system.

Generally, the heat resistance of a gas generating agent is closely related to the decomposition temperature, and the higher the decomposition temperature, the better the heat resistance. Sodium azide-based gas generators have a high decomposition temperature and high heat resistance because they are basically composed of inorganic substances, but non-sodium azide-based gas generators usually use organic fuel, so they are inevitable. The decomposition temperature tends to be lower, and the heat resistance tends to be lower than that of the sodium azide-based gas generating agent. In fact, most non-sodium azide gas generating agents have a decomposition onset temperature below 250 ° C., whereas sodium azide gas generating agents start to decompose above about 400 ° C. The good or bad of these heat resistances is
Determined by the type and composition ratio of the components contained in the gas generating agent, without changing the type and composition ratio of the gas generating agent,
It is difficult to improve heat resistance.

JP-A-8-12481 discloses a method for preventing decomposition of a gas generating agent and improving heat resistance.
It is disclosed that one or both of them is subjected to a surface coating treatment in order to prevent decomposition caused by contact between azodicarbonamide (ADCA) and CuO as an oxidizing agent. However, the ADCA / KClO ₄ / Cu illustrated here
With a composition such as O / starch, the combustion temperature is too high and the filter or airbag of the gas generator may be damaged by heat, or the gas generating agent may generate a large amount of particulate KCl mist after combustion. Since it is discharged outside the generator, it is difficult to use it as it is as a gas generating agent for an airbag. In order to solve these problems, a part of the oxidizing agent KClO ₄ is replaced with KNO ₃ or Sr (N
A method of replacing with a nitrate such as O ₃ ) ₂ is conceivable.
The method described in No. 481 cannot provide sufficient heat resistance. This is KNO ₃ or Sr (NO ₃ )
It is considered that this is because starch, which is a surface coating treatment agent, is taken into KNO ₃ and Sr (NO ₃ ) ₂ because ₂ is soluble in water, so that the surface of ADCA or CuO cannot be sufficiently coated.

Accordingly, the present invention provides a gas generant composition that can improve the heat resistance of a gas generant containing a non-sodium azide-based fuel without changing the type and composition ratio of the gas generant itself. The purpose is to do. Another object of the present invention is to provide a method for using the gas generating composition, a gas generator using the gas generating composition, and an inflator system using the gas generating apparatus.

[0006]

Means for Solving the Problems The present inventor has studied the mechanism of ADCA decomposition. As a result, ADCA decomposition is certainly caused by contact with CuO, but not only CONH ₂ generated by ADCA decomposition. The present invention has found that substances such as radicals, NH ₂ radicals, CO, and ammonia further promote decomposition, and that the heat resistance can be remarkably improved by removing these substances that promote decomposition. Was completed.

That is, the present invention provides a gas generating agent comprising a gas generating agent containing a non-sodium azide-based fuel and an adsorbent for adsorbing and holding a decomposition product generated by decomposition of the fuel. A composition is provided. The present invention also provides a method for using the gas generating composition, wherein the gas generating composition is placed in a gas generator to suppress decomposition of the gas generating agent and increase heat resistance of the gas generating agent. I will provide a. Further, the present invention provides a gas generator using the above gas generating composition. Further, the present invention provides an inflator system using the above gas generator.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A gas generating agent containing a non-sodium azide-based fuel used in the present invention contains other components such as a non-sodium azide-based fuel, an oxidizing agent and, if necessary, a binder. Things.

The non-sodium azide-based fuel is not particularly limited, and a nitrogen-containing compound generally used as a fuel for a gas generating agent can be used. Examples of such nitrogen-containing compounds include tetrazole derivatives such as 5-aminotetrazole, bitetrazole derivatives, triazole derivatives, dicyandiamide, azodicarbonamide, nitroguanidine, guanidine nitrate, oxamide, ammonium oxalate, hydrazodicarbonamide, and the like. be able to.

The content of the fuel in the gas generating agent varies depending on the type of the oxidizing agent and the oxygen balance, but is preferably 10 to 60% by weight, particularly preferably 20 to 50% by weight.
It is.

The oxidizing agent is not particularly limited, and may be at least one selected from oxyacid salts, metal oxides and metal double oxides.

The oxyacid salt includes a cation selected from ammonium, alkali metals and alkaline earth metals;
Examples thereof include those comprising a hydrogen-free anion selected from nitric acid, nitrous acid, chloric acid, and perchloric acid. Examples of such oxyacid salts include ammonium nitrate, ammonium nitrate, sodium nitrate, potassium nitrate, magnesium nitrate, and ammonium nitrate such as strontium nitrate;
Alkali metal salt or alkaline earth metal salt; ammonium nitrite such as ammonium nitrite, sodium nitrite, potassium nitrite, magnesium nitrite, strontium nitrite, etc., alkali metal salt or alkaline earth metal salt; ammonium chlorate, chlorine Ammonium salt, alkali metal salt or alkaline earth metal salt of chloric acid such as sodium citrate, potassium chlorate, magnesium chlorate, barium chlorate; ammonium perchlorate, sodium perchlorate, potassium perchlorate, perchloric acid Examples include ammonium salts, alkali metal salts or alkaline earth metal salts of perchloric acid such as magnesium and barium perchlorate.

As the metal oxide and the metal double oxide,
Oxides or double oxides of copper, cobalt, iron, manganese, nickel, zinc, molybdenum and bismuth. Examples of such metal oxides and metal double oxides include CuO, Cu ₂ O, Co ₂ O ₃ , CoO, C
o ₃ O ₄ , Fe ₂ O ₃ , FeO, Fe ₃ O ₄ , MnO ₂ , Mn ₂
O ₃ , Mn ₃ O ₄ , NiO, ZnO, MoO ₃ , CoMoO
₄ , Bi ₂ MoO ₆ or Bi ₂ O ₃ .

The content of the oxidizing agent in the gas generating agent is as follows:
It is preferably from 40 to 90% by weight, particularly preferably from 50 to 80% by weight.

The binder is not particularly limited, and organic binders such as sodium salt of carboxymethyl cellulose, starch, polyvinyl alcohol, microcrystalline cellulose, polyacrylamide, calcium stearate, molybdenum disulfide, acid clay, talc, Examples include inorganic binders such as bentonite, diatomaceous earth, kaolin, silica, alumina, and sodium silicate.

The content of the binder in the gas generating agent is as follows:
Preferably it is 0.1 to 15% by weight, particularly preferably 0.5 to 12% by weight.

The adsorbent used in the present invention is a decomposition product generated by the decomposition of the fuel described above, that is, a gas component such as CONH ₂ radical, NH ₂ radical, CO, ammonia, etc. which promotes the decomposition of the fuel, and a liquid component. This is for holding by suction. The adsorbent is preferably sufficiently dried to exhibit a higher adsorption effect. Such adsorbents include synthetic zeolites (molecular sieves),
One or more selected from natural zeolites, activated alumina, silica gel, activated carbon and clay (for example, acid clay, bentonite, diatomaceous earth, kaolin, talc) and the like can be mentioned, and among these, synthetic zeolites are particularly preferable.

Since the synthetic zeolite adsorbs a larger amount than other adsorbents even at a low partial pressure, it works effectively even in a non-pressurized gas generator, and adsorbs a large amount even at a high temperature.
Even when exposed to high temperatures as in the case of a gas generator for an air bag, the effect can be sufficiently exhibited. Furthermore, since the polar substance is preferentially adsorbed, the most undesirable substance having a decomposition promoting action such as ammonia can be effectively removed, and the mechanical strength and the thermal stability are excellent.

The synthetic zeolite has a pore size of about 3 mm.
3A type (for example, zeolam A-3 (trade name, which is a synthetic zeolite adsorbent manufactured by Tosoh Corporation);
4A type having a pore diameter of about 4 mm (for example, trade name Zeolam A-4 which is a synthetic zeolite adsorbent manufactured by Tosoh Corporation; spherical and 8 to 10 mesh in size),
5A type having a pore diameter of about 5 mm (for example, trade name Zeolam A-5, which is a synthetic zeolite adsorbent manufactured by Tosoh Corporation; spherical and 8 to 10 mesh in size), 13X type having a pore diameter of about 10 mm (for example, Zeolam F-9, a synthetic zeolite adsorbent manufactured by Tosoh Corporation; spherical, size 8
10 to 10 mesh). The substance that can be adsorbed by the synthetic zeolite changes depending on the size of the pore diameter (for example, the 3A type adsorbs water and ammonia, and the 4A type adsorbs water, ammonia, carbon dioxide, carbon monoxide, methanol, Adsorb ethanol etc.,
The 5A type and the 13X type also adsorb substances having higher molecular weights. The type of synthetic zeolite to be used may be appropriately selected from those having the ability to remove the substance to be removed.

The content of the gas generating agent and the adsorbent in the gas generating composition of the present invention is preferably 60 or more.
It is preferably from 98 to 98% by weight, particularly preferably from 70 to 96% by weight, and the adsorbent is preferably from 2 to 40% by weight, particularly preferably from 4 to 30% by weight.

The gas generating composition of the present invention is produced by, for example, producing a gas generating agent by a dry method of mixing a fuel, an oxidizing agent and the like in powder form or a wet method of mixing in the presence of water or an organic solvent. Further, it can be produced by mixing an adsorbent. Further, the gas generating composition of the present invention may be a mixture of a gas generating agent and an adsorbent, which are separately molded into pellets, beads, meshes, powders, disks, and the like. In addition, when the gas generating agent and the adsorbent are integrally molded, it is not a preferable mode because the gas generating agent may have a bad influence on the flammability of the gas generating agent. However, in the present invention, the composition is formed by such integral molding. It does not exclude making things.

Further, the gas generating composition of the present invention can make the gas generating agent and the adsorbent non-mixed. The `` non-mixed state '' in this case is, for example, when the gas generating agent and the adsorbent are separately packaged or in the same package,
As in the case where both components are separated so that they do not mix,
This refers to a state in which the gas generating agent and the adsorbent are not mixed.

The method for using the gas generating composition of the present invention is as follows.
This is a method in which the gas generating composition is placed in a gas generator to suppress the decomposition of the gas generating agent, thereby increasing the heat resistance of the gas generating agent. The gas generant composition is placed in a combustion chamber for generating gas in order to exert the essential function of gas generation, but if it is in a continuous space system in the gas generator, the gas generant and the adsorbent Can be placed separately. The term “in the continuous space system” as used herein means a state in which the adsorbent can adsorb and hold a fuel decomposition promoting substance such as CONH ₂ radicals, NH ₂ radicals, CO, and ammonia generated by decomposition of the gas generating agent. Is what you do. Therefore, not only the same space but also a case where two separately defined spaces are connected by a communication hole through which gas can flow can be included.

The gas generator of the present invention uses the above-mentioned gas generating composition. The structure and type of the gas generator itself are not particularly limited, and examples thereof include a mechanical ignition type air bag gas generator having a structure as shown in FIG.

In the gas generator 10, the gas generant composition 20 is placed in the gas generant combustion chamber 12. At this time, as described in the above-mentioned method of use, the gas generating agent 21 and the adsorbent 22 may be placed anywhere within a continuous space system, and may be further mixed or not mixed. . 14 is an ignition means accommodation room (enhancer room), 16 is an impact sensor, 25 is a cushion material,
0 is a coolant filter, and 40 is a gas outlet.

In the gas generator 10, the gas generating composition 2 is used in order to improve the moisture resistance of the gas generating composition.
0 can be placed in the canister assembly 50. The canister assembly 50 is composed of, for example, a canister container 51 and a canister cover 52 as shown in FIG. 2. The gas generating composition is placed in the canister container 51, and further sealed with a lid with the canister cover 52. You. However, in this case, since the canister assembly 50 forms a combustion chamber, it is necessary to secure both the moisture proof property and the gas supply path after combustion. Therefore, the canister assembly 50 has a wall thickness of about 200 μm so as to be easily ruptured by the pressure at the time of combustion in order to prevent moisture from entering and to supply gas generated by combustion of the gas generating agent to the outside of the combustion chamber. It is desirable to use the following aluminum.

Further, in the gas generator 10, a combustor cup (combustion ring) 60 can be provided as a partition for separating the gas generating agent combustion chamber 12 from the coolant filter 30. The combustor cup 60 has a thickness of 1 to 1 as shown in FIG.
It is about 2 mm. 61 is a gas generant combustion chamber 12
These are pores (compassion nozzles) for securing a supply path for the gas generated in step (1).

When the gas generating composition is placed at a desired site in the gas generator in this manner, CONH ₂ radicals, NH ₂ radicals, CO, ammonia, etc. generated by decomposition of the fuel in the gas generating agent. The fuel decomposition accelerator is
Adsorbed and held by the adsorbent. As a result, further promotion of the decomposition of the fuel by the decomposition promoting substance is suppressed. As a result of suppressing the decomposition of the fuel in this manner, the heat resistance of the gas generating agent is improved.

[0029] The inflator system of the present invention comprises a module case accommodating the gas generator and the airbag,
It is provided with a judgment circuit (in the case of an electric ignition type gas generator), a sensor, and the like, and is mounted on an automobile, an aircraft, or the like.

[0030]

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to only these examples. In the following, “parts” indicates “parts by weight”, “%” indicates “% by weight”, and each test was performed by the following method.

(1) Heat Resistance Test After the gas generating composition is sufficiently dried, for example, an aluminum container (canister assembly) 5 as shown in FIG.
Then, the main body (canister container) 51 and the lid (canister cover) 52 were caulked and completely sealed with a silicone adhesive. This is put in a thermostat at a predetermined temperature for a predetermined time, and the weight change before and after the heating (substantially the weight change of the gas generating agent) is compared to obtain a weight reduction rate.
The heat resistance was evaluated.

(2) Breaking strength A tensile and compression tester (TCM-500N) manufactured by Minebea Co., Ltd.
Using B), the breaking strength of the gas generating agent was measured. In this test, a gas generating agent molded into a substantially cylindrical shape was placed on a fracture strength measurement table so that the plane portion was in the vertical direction, and the center of the center was the blade of the testing machine (blade angle 120 °, radius 0.64).
The pressure when the pellet was cracked was read by a measuring instrument, and the value was taken as the breaking strength.

(3) Measurement of Gas Concentration A hole was made in the side wall of the aluminum container after the heat resistance test, and the tip of a detection tube for measuring a desired gas concentration was quickly inserted into the hole. At this time, sealing was performed so that gas did not leak from the joint between the aluminum container and the detection tube.

Production Example 1 29 parts of azodicarbonamide (ADCA) and CuO10
The parts were mixed with a rocking mixer. This was transferred to a slurry mixer, and an aqueous starch solution in which 1.5 parts of soluble starch was dissolved in 10 parts of water was added and wet-mixed. Next, KC
23 parts of 10 ₄ and 48 parts of KNO ₃ were added and further wet-mixed. This was granulated through a wire mesh having a mesh size of 1.7 mm, and then partially dried so that the water content became 0.5%. The granules were formed into pellets having a diameter of 5 mm and a thickness of 2 mm using a tableting machine, and then sufficiently dried with a dryer at 80 ° C to obtain a gas generating agent.

Comparative Example 1 The gas generating agent of Production Example 1 (ADCA / KClO ₄ / KNO ₃₎
A heat resistance test was performed at 105 ° C. using 40 g of pellets of (/CuO/starch=29/23/48/10/1.5). As a result, the weight loss rate of the gas generating agent after 200 hours was −5.17%, and the weight loss rate of the gas generating agent after 400 hours was −10.23%. It was confirmed that the weight was drastically reduced and it was difficult to use it as it was as a gas generating agent for an airbag.

Comparative Example 2 Before the heat resistance test of the gas generating agent used in Comparative Example 1, 200
When the breaking strength of the pellets after 400 hours and after 400 hours was measured, 6.52 kg, 5.45 kg, and 4.10 kg were respectively obtained.
Met. It was found that not only the weight loss, but also the breaking strength of the pellets decreased with time. As the measured value of the breaking strength, the average value of 20 pellets arbitrarily taken out was used.

Example 1 A gas generating composition comprising 40 g of the gas generating agent pellets of Production Example 1 and 8 g of a synthetic zeolite 13X type (pore diameter: about 10 mm) (not integrally molded. The same applies to the following description). , And a heat resistance test was conducted at 105 ° C. As a result, the weight loss rate of the gas generating agent after 200 hours was -0.51%, and the weight loss rate of the gas generating agent after 400 hours was -1.06%. The weight loss was significantly smaller than that of Comparative Example 1, and it was found that the compounding of the synthetic zeolite had a great effect in improving the heat resistance.

Example 2 Before the heat resistance test of the gas generating composition used in Example 1,
When the breaking strength of the pellet after 200 hours and 400 hours was measured, 6.52 kg, 6.40 kg, and 6.
It was 49 kg. Almost no reduction in the breaking strength of the pellet was observed. By comparison with Comparative Example 2, it was found that the compounding of the synthetic zeolite prevented the reduction in the strength of the pellet before and after the heat resistance test. Here, as the measured value of the breaking strength, an average value of 20 pellets arbitrarily taken out was used.

Example 3 A heat resistance test was conducted at 95 ° C. using a gas generating composition comprising 40 g of the gas generating agent pellets of Production Example 1 and 8 g of a synthetic zeolite 13X type (pore diameter: about 10 °). As a result, the weight loss rate of the gas generating agent in 400 hours was −
0.03%. By lowering the test temperature by 10 ° C. than in Example 1, the weight loss was further reduced significantly.

Examples 4 to 12 A heat resistance test was conducted at 105 ° C. using 40 g of the gas generating composition pellets of Production Example 1 and a predetermined amount of the synthetic zeolite shown in Table 1. As the synthetic zeolite, pellets of 3A type (pore diameter of about 3 mm), 4A type (pore diameter of about 4 mm), and 13X type (pore diameter of about 10 mm) were used. Table 1 shows the test results.

[0041]

[Table 1]

From the test results, high heat resistance was exhibited even when exposed to a high temperature of 105 ° C. for a long time. From these results, it was confirmed that when the gas generating composition of the present invention was applied to a gas generator for an air bag of an automobile, it had sufficient heat resistance for practical use.

Production Example 2 To 35 parts of high specific gravity nitroguanidine (NQ), water equivalent to 18 parts of the total amount was added and mixed. Next, 10 parts of sodium carboxymethylcellulose, Sr (N
50 parts of O ₃ ) _{2 and} 5 parts of acid clay were added sequentially, and kneaded. Since the temperature of the kneaded mixture increased by kneading, the mixture was cooled to room temperature. Next, the kneaded mixture was placed in an unheated drawing machine, and extruded through a mold having an outer diameter of 2.5 mm and an inner diameter of 0.8 mm under a pressure of 60 kg / cm ² to form a single-hole cylindrical string. I made a shape. Further, the string was cut into a length of 2.12 mm by a cutting machine, and moisture was sufficiently dried to obtain a gas generating agent.

Examples 13 to 16 45 g of the gas generating agent of Production Example 2 and 13X type (pore size
A heat resistance test was conducted at 95 ° C. using a gas generating composition comprising 5 g of a synthetic zeolite (about 10 °). The gas concentration in the aluminum container after the test was measured. Table 2 shows the test results.

[0045]

[Table 2]

From the test results, C was found in the aluminum container.
Only O gas was present, and it was confirmed that NH ₃ gas could be completely removed by blending the synthetic zeolite.

Comparative Examples 3 to 6 The gas generating agent of Production Example 2 (NQ / Sr (NO ₃ ) ₂ / CMC
−Na / acid clay = 35/50/10/5), and a heat resistance test was performed at 95 ° C. using 45 g. The gas concentration in the aluminum container after the test was measured. Table 3 shows the results.

[0048]

[Table 3]

From the test results, it was found that N
It was found that H ₃ gas and CO gas were present.

Example 17 Using the gas generating composition of Example 3
Each of the compositions after the heat resistance test at 5 ° C. for 400 hours was placed in each of the six gas generators for airbag shown in FIG. A tank combustion test was performed. In addition, at the time of the tank combustion test, the gas generator incorporating the composition before and after the heat resistance test was used at -40 ° C, 20 ° C, and 85 ° C.
Was used and left for at least 2 hours including the time required for the gas generator components including the composition to reach equilibrium with each temperature control temperature. As a result of the tank combustion test,
No change in combustion performance was observed before and after the heat resistance test. This is because the gas generant composition is 400
This indicates that the strength was not reduced because decomposition was suppressed even when left in a high temperature atmosphere for a long time.

Comparative Example 7 The procedure of Example 1 was repeated using the gas generating agent of Production Example 1 (ie, the gas generating composition of Example 3 containing no adsorbent).
A 60 L tank combustion test was performed in the same manner as in No. 7. As a result of the tank combustion test, a clear change was observed in the combustion performance before and after the heat resistance test. FIG. 4 shows the results of a combustion test to clarify the change. In FIG. 4, the solid line is a value before the heat resistance test, and the dotted line is a value after the heat resistance test. The horizontal axis shows the measurement time (t / msec), and the vertical axis shows the output (P / kgfcm ^-2 ) of the gas generator in the 60 L tank. FIG.
As is clear from the figure, the maximum output after the heat resistance test was slightly higher than the maximum output before the test. In particular, the initial rise of the output tended to be significantly higher after the heat resistance test. This is because the gas generating agent is 40 ° C at 105 ° C.
This indicates that the material was decomposed and decreased in strength due to being left in a high-temperature atmosphere of 0 hours, easily collapsed (crushed) by the impact of the ignition of the igniter, and increased in surface area.

[0052]

As described above, according to the present invention, in the gas generating composition, radicals generated by the decomposition of the fuel and substances for promoting the decomposition of the fuel such as ammonia are adsorbed and held by the adsorbent.
Therefore, further decomposition of the fuel is suppressed by such an action, so that the heat resistance of the gas generating agent can be improved. Therefore, the reliability of the gas generator and the inflator system is improved, and stable performance can be maintained for a long time.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a gas generator in a diameter direction.

FIG. 2 is a perspective view of a canister assembly which is a part of the gas generator.

FIG. 3 is a perspective view of a combustor cup which is a part of the gas generator.

FIG. 4 is a diagram for explaining the results of a 60 L tank combustion test of a gas generating agent.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Gas generator 12 Gas generating agent combustion chamber 20 Gas generating composition 21 Gas generating agent 22 Adsorbent

Claims (7)

[Claims] 1. A gas generating composition comprising a gas generating agent containing a non-sodium azide-based fuel and an adsorbent for adsorbing and holding a decomposition product generated by decomposition of the fuel. 2. The gas generating composition according to claim 1, wherein the adsorbent is at least one selected from synthetic zeolites, natural zeolites, activated alumina, silica gel, activated carbon and clay. 3. The synthetic zeolite has a 3A type (pore size of about 3 mm), a 4A type (pore size of about 4 mm), a 5A type (pore size of about 5 mm) and a 13X type (pore size of about 1 mm).
3. The gas generant composition according to claim 2, which is at least one member selected from 0 °). 4. A gas generating agent containing a non-sodium azide-based fuel and an adsorbent for adsorbing and holding a decomposition product generated by decomposition of the fuel are in a non-mixed state.
4. The gas generating composition according to any one of items 1 to 3. 5. The gas generating composition according to claim 1, wherein the gas generating composition is placed in a gas generator to suppress decomposition of the gas generating agent and increase heat resistance of the gas generating agent. To use a gas generating composition. 6. A gas generator using the gas generating composition according to any one of claims 1 to 4. 7. An inflator system using the gas generator according to claim 6. Description: