WO2007123120A1

WO2007123120A1 - Explosive composition, explosive composition molded body, and their production methods

Info

Publication number: WO2007123120A1
Application number: PCT/JP2007/058339
Authority: WO
Inventors: Kouichi Sasamoto; Yasuhiro Tanaka
Original assignee: Nipponkayaku Kabushikikaisha
Priority date: 2006-04-19
Filing date: 2007-04-17
Publication date: 2007-11-01
Also published as: EP2022770A1; CN101466653A; JPWO2007123120A1; US20090159163A1

Abstract

Disclosed is an explosive composition which is obtained by kneading a fuel component and an oxidant component by using an aqueous emulsion of a hydrophobic adhesive and then drying the kneaded material. The explosive composition exhibits high water resistance, good extrusion moldability and good cleanability from molding machines, while having only a few production problems. A molded body of this explosive composition is preferably applied to gas generants, auto igniters, enhancers and the like, and is particularly preferably used for a gas generator for activating an automobile safety system.

Description

Specification

Explosive composition, explosive composition molded body, and production method thereof

Technical field

TECHNICAL FIELD [0001] The present invention relates to an explosive composition, an explosive composition molded body, and a method for producing the same. Specifically, for example, an automobile safety device such as an air bag, a seat belt pretensioner, or a hood raising device is operated. The present invention relates to an explosive composition suitable for use in a gas generator.

Background art

[0002] The explosive composition for a gas generator includes, for example, a gas generating agent, an engineering agent, an igniting agent, and a toughening agent. Of these chemicals, gas generating agents, ensemble agents, and toy-foaming agents are usually used as molded products, so they are adhesives that dissolve in the solvents used, such as water and organic solvents ( Binder) is added (Japanese Patent Laid-Open No. 2000-95592). Further, as an aqueous adhesive using water as a solvent, there is known an extrudable ignition composition using a water-soluble or water-swellable binder (Japanese Patent Publication No. 2003-524565). Furthermore, an explosive composition using an aqueous suspension of ethylene / butyrate copolymer as an aqueous adhesive is known (Japanese Patent Laid-Open No. 2003-238285). An explosive composition using synthetic hydrotalcite as an inorganic binder is also known (Japanese Patent Laid-Open No. 2001-192288).

Disclosure of the invention

[0003] However, in the case of a binder using an organic solvent as a solvent described in Japanese Patent Application Laid-Open No. 2000-95592, it is necessary to consider safety and comply with VOC (volatile organic compounds) emission regulations. There is a drawback that must be done. In addition, in the case of a binder using water as a solvent described in Japanese Patent Application Laid-Open No. 2000-95592 and Special Table 2003-524565, safety is good, but hygroscopicity cannot be reduced, In addition, after molding, there is a drawback that the molded bodies are fixed to each other. In addition, there are many manufacturing problems such as the labor required for cleaning due to the chemicals adhering to the molding machine. In addition, there is a problem in maintenance of the manufacturing apparatus that a solvent is required for cleaning the molding machine due to the adhesion of the chemical. JP 2003-238285 In the composition described in the publication No., a molded body cannot be obtained even by extrusion molding. Although the binder used in JP-A-2001-19 2288 is effective as a binder for tableting, it is not suitable as a binder for extrusion molding, and an extruded product cannot be obtained.

[0004] The present invention has been made to solve the above-described problems, and the object of the present invention is to provide an explosive composition and explosive that have better water resistance and less manufacturing problems than conventional ones. The object is to provide a molded article of the composition. Another object of the present invention is to provide a profitable explosive composition and a method for producing an explosive composition molded body.

That is, the gist of the present invention is as follows.

[0006] 1. An explosive composition obtained by kneading and drying a fuel component and an oxidant component in the presence of an aqueous emulsion of a hydrophobic adhesive.

[0007] 2. The explosive composition as described in 1 above, wherein the content of the hydrophobic adhesive is 2 to 15% by mass.

[0008] 3. The hydrophobic adhesive described in 1 or 2 above, wherein the hydrophobic adhesive is at least one selected from the group consisting of a rubber adhesive, an acrylic adhesive, and a silicone adhesive. Gunpowder composition.

[0009] 4. The explosive composition as described in 3 above, wherein the hydrophobic adhesive is an acrylic adhesive.

[0010] 5. The explosive composition according to 3 or 4 above, wherein the hydrophobic adhesive has a thermal decomposition temperature of 200 ° C or higher.

[0011] 6. The explosive composition according to any one of 1 to 5, wherein the fuel component is a nitrogen-containing compound and Z or boron.

[0012] 7. A group strength is also selected in which the nitrogen-containing compound is composed of guanidine, tetrazole, bitetrazole, triazole, hydrazine, triazine, azodicarbonamide, dicyanamide and their derivatives, and nitramine compounds. The explosive composition as described in 6 above, which is at least one kind.

[0013] 8. Any one of the above 1 to 7, wherein the oxidant component is at least one selected from the group consisting of chlorate, perchlorate, nitrate and basic nitrate The explosive composition according to item 1. [0014] 9. At least one selected from the group consisting of ammonium perchlorate, potassium perchlorate, sodium perchlorate, potassium nitrate, sodium nitrate, strontium nitrate and basic copper nitrate. The explosive composition as described in 8 above, which is of a kind.

[0015] 10. The explosive composition according to any one of 1 to 9, further comprising at least one selected from a metal powder, a silicon nitride, and a metal nitride.

[0016] 11. The explosive composition according to any one of the above 1 to 10, further comprising a surfactant.

[0017] 12. The explosive composition as described in 11 above, wherein the surfactant is a non-one surfactant having an HLB value of 15 or less.

[0018] 13. The fuel component and the oxidizer component according to any one of 1 to 9 above are kneaded, molded, and dried in the presence of an aqueous emulsion of a hydrophobic adhesive. Gunpowder Composition molded body.

[0019] 14. The explosive composition molded article according to the above 13, wherein the molded article is any one of a gas generating agent, an autoidation agent, and an engineered agent.

[0020] 15. The explosive composition molded article according to item 13 or 14, wherein the molded article is for an automobile safety device.

[0021] 16. The shape according to any one of the above 13 to 15, wherein the shape of the molded body is any of a granular shape, a tablet shape, a columnar shape, a cylindrical shape, a prismatic shape, a porous cylindrical shape, and a porous prismatic shape. The explosive composition molded article according to item 1.

[0022] 17. Further, at least selected from metal powder, silicon nitride, and metal nitride

The explosive composition molded article according to any one of the above 13 to 16, wherein the explosive composition comprises one kind.

[0023] 18. The explosive composition molded article according to any one of 13 to 17, further comprising a surfactant.

[0024] 19. The explosive composition molded article as described in 18 above, wherein the surfactant is a non-one surfactant having an HLB value of 15 or less.

[0025] 20. A method for producing an explosive composition, which comprises kneading a fuel component and an oxidant component using an aqueous emulsion of a hydrophobic adhesive and drying the mixture with water. [0026] 21. A method for producing an explosive composition molded article, wherein a fuel component and an oxidant component are kneaded using an aqueous emulsion of a hydrophobic adhesive, then molded and then dried and solidified. .

[0027] 22. The method for producing an explosive composition molded article according to the above 17, wherein the molding is extrusion molding.

[0028] The explosive composition of the present invention can easily disintegrate the agglomerated chemicals after drying with little adhesion between the molded articles after molding. Further, the obtained dried molded article has good moisture absorption resistance and water resistance, and is suitable as an explosive composition for a gas generator for operating an automobile safety device that dislikes moisture. Further, in producing a molded product of the explosive composition of the present invention, a hydrophobic adhesive is dispersed in water in an emulsion state and used as an aqueous emulsion, whereby a kneaded mixture of a fuel component and an oxidant component is obtained. It becomes sticky and extrudates. Furthermore, the kneaded product is difficult to adhere to the manufacturing machine, and it is easy to clean the machine after manufacturing.

BEST MODE FOR CARRYING OUT THE INVENTION

[0029] The explosive composition of the present invention comprises a fuel component and an oxidant component as main components, and these are kneaded using an aqueous emulsion of a hydrophobic adhesive, molded as necessary, and then dried. Is. The pressure-sensitive adhesive used in the present invention is a hydrophobic pressure-sensitive adhesive, and forms an aqueous emulsion by being dispersed in water. Examples of such hydrophobic pressure-sensitive adhesives include rubber-based pressure-sensitive adhesives, acrylic pressure-sensitive adhesives, and silicone-based pressure-sensitive adhesives. Acrylic pressure-sensitive adhesives are also preferable in terms of combustion speed and cleanliness of combustion gas. The amount used is preferably 2 to 15% by mass as a solid content in the explosive composition. In particular, from the viewpoint of moldability and cleanliness of combustion gas, the power to contain 3 to 9% by mass as a solid content. More preferable. Desirably, the thermal decomposition temperature of the pressure-sensitive adhesive is higher than the self-decomposition temperature of the explosive composition. In addition, it is preferable to use an acrylic pressure-sensitive adhesive that allows the explosive composition before molding to have a sticky state in terms of extrusion molding.

[0030] Examples of the fuel component used in the present invention include nitrogen-containing compounds and boron. Examples of nitrogen-containing compounds include guanidine, tetrazole, bitetrazole, triazole, hydrazine, triazine, azodicarbonamide, dicyanamide and derivatives thereof. Mention may be made of at least one of the body and the group powers that will be the strength of the traminy compound. More specifically, 5-oxo 1, 2, 4 triazole, tetrazole, 5-amino tetrazole, aminotetrazole nitrate, nitroaminotetrazole, bitetrazole (5, 5, be 1H-tetrazole), 5, 5, 1 be 1H —Tetrazole diammonium salt, azobistetrazole, 5,5'-tetrazodazole guanidine salt, guanidine, nitroguanidine, cyanoguanidine, triaminoguanidine nitrate, guanidine nitrate, aminoguanidine nitrate, Biuret, azodicarbonamide, carbohydrazide, carbohydrazide nitrate complex, oxalic hydrazide, hydrazine nitrate complex, ammine complex and the like can be mentioned. Among these nitrogen-containing organic compounds, nitroguanidine and guanidine nitrate are preferred because they are inexpensive, reactive, and relatively easy to handle, and therefore one or more selected from tetrazole derivatives and guanidine derivatives are preferred. One or more selected from bistetrazole, azobistetrazole and 5-aminotetrazole are particularly preferred.

[0031] The content (mixing ratio) of the fuel component in the explosive composition of the present invention is preferably about 15 to 50% by mass, more preferably about 20 to 45% by mass. When the content (mixing ratio) of the fuel component is less than 15% by mass, the number of moles of gas generated per lOOg of the explosive composition when the explosive composition is used as the gas generating agent decreases, and the amount of NOx generated due to excess oxygen It tends to increase. On the other hand, when the fuel component content (mixing ratio) exceeds 50% by mass, the fuel component with a low specific gravity increases, so the true specific gravity of the explosive composition as the gas generating agent decreases. In addition, the filling amount per volume to gas generators such as those used for seat belt pretensioners is reduced. It is also because there is a tendency to generate a lot of CO gas due to the lack of oxidant components. When a nitrogen-containing compound and fluorine are used in combination as a fuel component, the use ratio is more preferably 0.1 to 10 parts by mass of boron when the nitrogen-containing compound is 1 part by mass. Means that the boron content is 0.5 to 5 mass%.

[0032] Examples of the oxidant component used in the present invention include chlorate, perchlorate, nitrate, or basic nitrate. Examples of chlorates include alkali metal salts of chloric acid such as potassium chlorate and sodium chlorate, alkaline earth metal salts of chloric acid such as barium chlorate and calcium chlorate, and chloric acid such as ammonium chlorate. Ammonium salt I can get lost. Examples of perchlorates include alkali metal salts of perchloric acid such as potassium perchlorate and sodium perchlorate, alkaline earth metal salts of perchloric acid such as barium perchlorate and calcium perchlorate, and perchlorate. Ammonium salts of perchloric acid such as acid ammonium. Examples of nitrates include ammonium nitrates such as ammonium nitrate, alkali metal salts of nitric acid such as sodium nitrate and potassium nitrate; alkaline earth metal salts of nitric acid such as barium nitrate and strontium nitrate. Examples of basic nitrates that can be used include basic copper nitrate, basic manganese nitrate, basic iron nitrate, basic molybdenum nitrate, basic bismuth nitrate, and basic cerium nitrate. Among these, among perchlorates in which perchlorate, nitrate or basic nitrate is preferred, ammonium perchlorate or potassium perchlorate having a high generated gas amount and high reactivity are preferred. Among nitrates, metal nitrates selected from alkali metals and alkaline earth metals are preferred for reasons such as reactivity and handling, and potassium nitrate and strontium nitrate are particularly preferred. Or, among the basic nitrates, the thermal stability is low and the combustion temperature is low. Basic copper nitrate is preferred.

[0033] The content (mixing ratio) of the oxidant component in the explosive composition of the present invention is preferably about 40 to 80% by mass. When the content of oxidant component (mixing ratio) is less than 40% by mass, there is a tendency to generate more CO gas due to lack of oxygen, while when it exceeds 80% by mass, There is a tendency for NOx generation to increase due to excess oxygen.

[0034] The explosive composition of the present invention may contain a metal powder, a silicon nitride, or a metal nitride in order to further increase the combustion rate and further improve the ignitability. Examples of the metal powder include aluminum, magnesium, madanalium, titanium, and zirconium. Examples of the silicon nitride or metal nitride include silicon nitride, boron nitride, aluminum nitride, magnesium nitride, molybdenum nitride, tungsten nitride, calcium nitride, barium nitride, strontium nitride, zinc nitride, sodium nitride, copper nitride, Examples include titanium nitride, manganese nitride, vanadium nitride, nickel nitride, cobalt nitride, iron nitride, zirconium nitride, chromium nitride, tantalum nitride, niobium nitride, cerium nitride, strontium nitride, yttrium nitride, and germanium nitride. Metal powder, key nitrogen The content of the fluoride or metal nitride is preferably 0 to 10% by mass in the explosive composition.

[0035] The explosive composition of the present invention may further contain a surfactant in order to further improve the kneadability of the fuel component, the oxidant component and the hydrophobic pressure-sensitive adhesive and to further enhance the extrusion moldability. . As the surfactant, for example, any of nonionic surfactants, ionic surfactants, and cationic surfactants can be used, but nonionics such as Neugen (Daiichi Kogyo Seiyaku Co., Ltd.) can be used. A surfactant is desirable. Among non-ionic surfactants, the HLB (Hydrophile Lipophile Balance) value is preferably 15 or less. More preferably, it is 3 to 15. When two or more surfactants are used in combination, the HLB value is calculated using a weighted average. If the HLB is too low, the water dispersibility in the water system is poor. On the other hand, if the HLB is too high, the moisture absorption resistance of the explosive composition will decrease. The content of the surfactant is preferably 0 to 5% by mass in the explosive composition.

[0036] In order to further improve the extrudability, the explosive composition of the present invention may contain an extrusion aid as a water retention agent / lubricant. Extrusion aids include carboxymethyl cellulose (CMC), carboxymethylcellulose sodium salt (CMCNa), carboxymethylcellulose potassium salt, carboxymethylcellulose ammonium salt, cellulose acetate, cenololose acetate butyrate (CAB), methylcellulose ( MC), ethinoresenoreose (EC), hydroxypropylmethylcellulose (HPMC), hydroxyethylcellulose (HEC), ethylhydroxyethylcellulose (EHEC), hydroxypropylcellulose (HPC), carboxymethylethylcellulose (CMEC). The content of the extrusion aid is preferably 0 to 1% by mass in the explosive composition.

[0037] In addition, acid clay, kaolin-based slag forming agents, chlorine neutralizing agents such as alkali metals or alkali earth metals, molybdenum oxide, vanadium oxide, iron oxide, copper oxide, acid chrome In addition, a combustion catalyst such as cobalt oxide or aluminum oxide can be blended.

[0038] In the explosive composition of the present invention, the explosive composition preferably used as a molded product can be used as a gas generating agent, an autoidation agent or an engineer agent. In the case of a gas generating agent, it is preferable to use a nitrogen-containing compound as a fuel. Enhansa Agent is used to increase the flame generated by the igniter and make it easier to burn the gas generant. Therefore, a nitrogen-containing compound or boron is preferable as the fuel. Autoidation agents have the property of self-ignition at a temperature lower than the ignition temperature of the gas generating agent, for example, around 180 ° C. Those used are mentioned (see JP-A-2001-80986).

[0039] The explosive composition molded body of the present invention is used for, for example, parts for automobile safety devices. Examples of parts for automobile safety devices include a gas generator for an air bag, a gas generator for a seat belt pretensioner, and a small gas generator for a bonnet lifting device. The explosive composition molded body of the present invention is used in these gas generators in combination as a gas generating agent, an autoidation agent and an engineering agent as necessary.

[0040] The explosive composition molded article of the present invention exhibits a powdery or granular form. Further, examples of the shape of the molded body include an extruded molded body and a tablet. Examples of the shape of the extrusion-molded body include granules, columns, cylinders, prisms, porous cylinders, and porous prisms. Examples of tablets include tableting pellets.

[0041] The explosive composition of the present invention is produced by kneading and drying a fuel component and an oxidant component with an aqueous emulsion of a hydrophobic adhesive. Here, in addition to the respective components, for example, the above-described metal powder, silicon nitride, metal nitride, surfactant, extrusion aid, combustion catalyst, etc. are appropriately selected within a range that does not impair the object of the present invention. Can be selected and blended. In order to produce the explosive composition of the present invention as a molded article, the fuel component and the oxidant component are kneaded with an aqueous emulsion of a hydrophobic adhesive, then molded, and then dried and solidified. . Here, it is preferable to form a kneaded product obtained by kneading each component with a molding machine, and mixing and kneading may be performed with a molding machine, particularly an extruder. Examples of the molding machine include a tableting machine, a compression molding machine, an extrusion molding machine, a drawing machine, and a granulating machine. Among these, an extrusion molding machine is preferable.

[0042] << Example >>

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.

[0043] (Example 1)

Guadine nitrate 40% by mass, strontium nitrate 25% by mass, and basic copper nitrate 25% The surfactant Neugen TDS-30 (made by Daiichi Kogyo Seiyaku Co., Ltd.) is mixed in a rocking mixer, and the mixture is 9% by mass with a water-based emulsion of acrylic pressure-sensitive adhesive in a kneading machine. The HLB value is 8.0. Then, 15 parts by mass of ion-exchanged water was added to 100 parts by mass of these component systems and kneaded uniformly. Next, the obtained kneaded product was extruded into a predetermined shape while passing through a die having a diameter of 2.5 mm by applying a predetermined pressure with an extruder. The extruded explosive composition molded body was cut into a length of 6.5 mm and dried to obtain a cylindrical explosive composition molded body for a gas generating agent.

[0044] The combustion rate (40% -70%) dpZdt, which is a parameter indicating the ignitability and combustibility, of the obtained explosive composition molded article for gas generant was 2.32 MPaZms. Combustion rate (40% —70%) dpZdt is a pressure sensor that measures the internal pressure of a bomb when 0.3 g of an enhancer agent and 2.5 g of a gas generating agent are combusted in an 18 cc bomb. It is the slope of the curve from 40% to 70% when the maximum pressure is 100%, obtained from the combustion curve.

[0045] (Example 2)

Mix guanidine nitrate 40% by mass, strontium nitrate 25% by mass, basic copper nitrate 25% by mass, and hydroxypropylmethylcellulose 1% by mass with a rocking mixer, and use an acrylic adhesive aqueous emulsion as a solid content in a kneader. Furthermore, 15 parts by mass of ion-exchanged water was added to 100 parts by mass of these component systems and kneaded uniformly. Next, the obtained kneaded material was extruded into a predetermined shape by applying a predetermined pressure with an extruder and passing through a die having a diameter of 2.5 mm. The extruded explosive composition molded body was cut into a length of 6.5 mm and dried to obtain a cylindrical explosive composition molded body for a gas generating agent.

[0046] The combustion rate (40% -70%) dpZdt, which is a parameter indicating the ignitability and combustibility, of the obtained explosive composition molded article for gas generant was 2.27 MPaZms. Combustion rate (40% —70%) dpZdt is a pressure sensor that measures the internal pressure of a bomb when 0.3 g of an enhancer agent and 2.5 g of a gas generating agent are combusted in an 18 cc bomb. It is the slope of the curve from 40% to 70% when the maximum pressure is 100%, obtained from the combustion curve.

[0047] (Example 3) 5-aminotetrazole 10 mass ^_0/0 and potassium nitrate 68 mass ^_0/0 were mixed with a rocking mixer, 12 wt% of boron with a kneading machine, 9 wt% of an aqueous emulsion of the acrylic pressure-sensitive adhesive solid content, surfactant Noigen 1% by mass of TDS-30 (Daiichi Kogyo Seiyaku Co., Ltd.) was mixed, and 16 parts by mass of ion-exchanged water was added to 100 parts by mass of these component systems, and kneaded uniformly. Next, the obtained kneaded material was extruded into a predetermined shape while applying a predetermined pressure with an extruder and passing through a die having a diameter of 1.8 mm. The extruded explosive composition molded body was cut into a length of 2.5 mm, and dried to obtain a cylindrical explosive composition molded body for an enno and sensor.

[0048] The combustion rate (30% -70%) dpZdt, which is a parameter indicating the ignitability and combustibility, of the obtained explosive composition molded article for an enhancer was 10.3 MPaZms. Combustion rate (30% 70%) The dpZdt measurement method uses a pressure sensor to measure the internal pressure of the bomb when 1200 mg of enhancer agent is combusted in an 18 cc bomb, and obtain it from the combustion curve between the combustion time and the combustion pressure. It is the slope of the curve from 40% to 70% when the maximum pressure is 100%.

[0049] (Example 4)

Ammonium perchlorate 26% by mass, strontium nitrate 26% by mass, and 4% by mass of copper oxide as a combustion catalyst were mixed in a rocking mixer, and in a kneader, 34 mass% of trologin, acrylic adhesive 9% by mass of aqueous emulsion of the agent and 1% by mass of surfactant Nogen TDS-30 (Daiichi Kogyo Seiyaku Co., Ltd.) as a solid content, and further to 100 parts by mass of these component systems, ion-exchanged water 13 Mass parts were added and kneaded uniformly. Next, the obtained kneaded material was extruded into a predetermined shape while applying a predetermined pressure with an extruder and passing through a die having a diameter of 1.5 mm. The extruded explosive composition molded body was cut into a length of 2.0 mm and dried to obtain a cylindrical explosive composition molded body for a gas generating agent.

[0050] The combustion rate (30% -70%) dpZdt, which is a parameter indicating the ignitability and combustibility, of the obtained explosive composition molded article for gas generant was 13. IMPaZms. Combustion rate (30%-70%) The dpZdt measurement method uses a pressure sensor to measure the internal pressure of the bomb when 1250 mg of the explosive composition for gas generant is burned in the lOcc bomb, and The combustion curve force is also obtained, and is the slope of the curve from 40% to 70% when the maximum pressure is 100%. [0051] (Example 5)

5-aminotetrazole 28 mass ^_0/0, potassium nitrate 61 mass ^_0/0, and 4 wt% molybdenum trioxide were mixed in a rocking mixer, 6 wt% of an aqueous emulsion of the acrylic pressure-sensitive adhesive solid content, surfactant Noigen 1% by mass of TDS-30 (Daiichi Kogyo Seiyaku Co., Ltd.) was mixed, and 16 parts by mass of ion-exchanged water was added to 100 parts by mass of these component systems and kneaded uniformly. Next, the obtained kneaded material was extruded into a predetermined shape while applying a predetermined pressure with an extruder and passing through a die having a diameter of 1.8 mm. The extruded explosive composition molded body was cut into a length of 2.5 mm and dried to obtain a cylindrical explosive composition molded body for an auto-idanization agent.

[0052] In order to evaluate the performance of the obtained explosive composition molded product for autoidation agent, measurement of ignition time at 200 ° C and measurement of decomposition start temperature with TG-DTA thermobalance Z differential thermal analyzer did. The ignition time at 200 ° C is 2 seconds and the decomposition start temperature is 175 ° C.

[0053] (Example 6)

The thermal shock test was performed using the molded explosive composition molding for Ennoenser obtained in Example 3 at a temperature change from 40 ° C to 10 7 ° C for 200 cycles, and at 107 ° C for 400 hours. A heat resistance test was allowed to stand for 1500 hours and 3000 hours, and the weight loss rate was measured. In addition, the internal pressure of the bomb when 1200 mg of the gunpowder composition for an energizer was burned in an 18 cc bomb was measured with a pressure sensor, and the relationship between the combustion time before and after the test and the combustion pressure (30% —70%) Asked. The results are shown in Table 1. From this result, it can be seen that an explosive composition molded article with good environmental resistance and a low weight loss rate and a small change in the burning rate in the thermal shock test and heat resistance test was obtained. .

[0054] _¾1

[Example 7] Guadine nitrate 40 mass%, strontium nitrate 25 mass%, and basic copper nitrate 25 mass% are mixed in a rocking mixer, and the acrylic adhesive aqueous emulsion is 9 mass% in solid content with a kneader, HLB value 13.3% of the surfactant Neugen TDS-80 (Daiichi Kogyo Seiyaku Co., Ltd.) with 13.3 is added, and 15 parts by weight of ion-exchanged water is added to 100 parts by weight of these components. Kneaded uniformly. Next, the obtained kneaded product was extruded into a predetermined shape while passing through a die having a diameter of 2.5 mm by applying a predetermined pressure with an extruder. The extruded explosive composition molded body was cut into a length of 6.5 mm and dried to obtain a cylindrical explosive composition molded body for a gas generating agent.

[Example 8]

Guadine nitrate 40 mass%, strontium nitrate 25 mass%, and basic copper nitrate 25 mass% are mixed in a rocking mixer, and the acrylic adhesive aqueous emulsion is 9 mass% in solid content with a kneader, HLB value 16.3% of the surfactant Neugen TDS-200D (Daiichi Kogyo Seiyaku Co., Ltd.) with 16.3 is mixed, and 15 parts by weight of ion exchange water is added to 100 parts by weight of these components. Kneaded. Next, the obtained kneaded material was extruded into a predetermined shape while applying a predetermined pressure with an extruder and passing through a die having a diameter of 2.5 mm. The molded explosive composition molded body was cut into a length of 6.5 mm and dried to obtain a cylindrical explosive composition molded body for a gas generating agent.

[0057] (Comparative Example 1)

Guanidine nitrate 41% by mass, strontium nitrate 25% by mass, basic copper nitrate 25% by mass, hydroxypropylmethylcellulose 6% by mass, and polybulurpyrrolidone 3% by mass are mixed in a mouth mixer, and these component systems 100% by mass 15 parts by mass of ion exchange water was added to the part and kneaded uniformly. Next, the obtained kneaded product was extruded into a predetermined shape while passing through a die having a diameter of 2.5 mm under a predetermined pressure with an extruder. The molded product of the extruded gas generant composition was cut into a length of 6.5 mm and dried to obtain a cylindrical gas generant composition molded product.

[0058] A moisture absorption experiment was performed using the explosive composition molded article for gas generant obtained in Examples 7 and 8 and the gas generant composition molded article obtained in Comparative Example 1. The moisture absorption test method was as follows: the composition of the explosive composition for gas generant was set in an atmosphere of 31%, 52%, 80%, 93% relative humidity at 25 ° C. The features were exposed and the weight gain over time was measured. Table 2 shows the results of the weight change rate before and after exposure in the measured atmosphere. From this result, when comparing the example and the comparative example, the weight change rate after 48 hours was 1.42% at the maximum in the example, whereas 1.530% in the comparative example 1. It can be seen that the example shows less moisture absorption. In addition, when the Examples are compared, the HLB value of the nonionic surfactant is 8.0, Example 7, the HLB value is 13.3, Example 7, and the HLB value is 16.3. It can be seen that the rate of weight change gradually increases, and that moisture absorption increases as the HLB value increases. Table 2

(Comparative Example 2)

Perchlorate ammonium - © arm 26 wt%, mixed strontium nitrate 26% by weight, and as a combustion catalyst of copper oxide 4 mass ^_0/0, hydroxypropylmethylcellulose 6 mass ^_0/0, and Poriakurirua bromide 3% by mass in a rocking mixer And mixing 35% by mass of trologin in a kneader Furthermore, 14 parts by mass of ion-exchanged water was added to 100 parts by mass of these component systems and kneaded uniformly. Next, the obtained kneaded material was extruded into a predetermined shape by applying a predetermined pressure with an extruder and extruding it through a die having a diameter of 1.5 mm. The extruded product of the gas generant composition was cut into a length of 2. Omm and dried to obtain a cylindrical gas generant composition formed product.

[0061] (Comparative Example 3)

5-aminotetrazole 11 mass ^_0/0, potassium nitrate 68 mass ^_0/0, hydroxypropylmethyl cellulose 6% by weight, and polyacrylamide 3 wt% were mixed in a rocking mixer, a mixture of boron 12% by mass in the kneader, further To 100 parts by mass of these component systems, 17 parts by mass of ion exchange water was added and kneaded uniformly. Next, the obtained kneaded product was extruded into a predetermined shape by extruding it through a die having a diameter of 1.8 mm with a predetermined pressure by an extruder. The extruded molded body of the ennno and sensory agent composition was cut into a length of 2.5 mm and dried to obtain a cylindrical shaped erno and sensory agent composition molded body.

[0062] By using the explosive composition molded article for gas generant obtained in Example 3 and the gas generant composition molded article obtained in Comparative Examples 1 and 2, and the enhancer obtained in Example 4. Extrusion molding using the explosive composition molded article for the agent and the enhancer agent composition molded article obtained in Comparative Example 3, and further using the explosive composition molding for the gas generating agent obtained in Example 8. Properties, adhesion between molded products, and cleanability of the molding machine. The results are shown in Table 3. From these results, when comparing the example and the comparative example, all of the examples were excellent in the extrusion moldability and the cleaning property of the molding machine, and the adhesion between the molded products was not observed. On the other hand, in the comparative example, although the extrusion moldability was good, the molding machine was poorly cleaned and the molded products were firmly adhered to each other. The symbols in Table 3 mean the following.

[0063] Extrudability: 〇 Could be formed by an extruder

X Force that cannot be formed by an extruder

Cleanability of the molding machine: 〇 The deposits on the extruder could be removed by hand

X The deposits on the extruder could not be removed by hand, and the deposits adhered to each part could not be removed without using a scraper after wetting the deposits with hot water. Table 3

Example (Comparative example) Extrudability Adhesion between molded products Cleanability of molding machine Example 1 ○ None ○ Example 3 ○ None ○ Example 4 ○ None ○ Example 8 ○ None ○ Comparative Example 1 ○ Yes X Comparative Example 2 Yes Yes X Comparative Example 3 Yes Yes X

Claims

The scope of the claims

[I] An explosive composition obtained by kneading and drying a fuel component and an oxidizer component in the presence of an aqueous emulsion of a hydrophobic adhesive.

[2] The explosive composition according to claim 1, wherein the content of the hydrophobic adhesive is 2 to 15% by mass.

[3] The hydrophobic adhesive according to claim 1 or 2, wherein the hydrophobic adhesive is at least one kind selected from a rubber adhesive, an acrylic adhesive, and a silicone adhesive. Gunpowder composition.

[4] The explosive composition according to claim 3, wherein the hydrophobic adhesive is an acrylic adhesive.

[5] The explosive composition according to claim 3 or 4, wherein the hydrophobic adhesive has a thermal decomposition temperature of 200 ° C or higher.

6. The explosive composition according to any one of claims 1 to 5, wherein the fuel component is a nitrogen-containing compound and Z or boron.

[7] At least one in which the nitrogen-containing compound is selected from the group power consisting of guanidine, tetrazole, bitetrazole, triazole, hydrazine, triazine, azodicarbonamide, dicyanamide and their derivatives, and nitramine compounds. The explosive composition according to claim 6, wherein the explosive composition is of a type.

[8] The oxidant component is at least one selected from the group power consisting of chlorate, perchlorate, nitrate, and basic nitrate.

The explosive composition according to item 1.

[9] The oxidant component is ammonium perchlorate, potassium perchlorate, sodium perchlorate.

The explosive composition according to claim 8, wherein the explosive composition is at least one selected from the group consisting of potassium nitrate, sodium nitrate, strontium nitrate and basic copper nitrate.

10. The explosive composition according to any one of claims 1 to 9, further comprising at least one selected from metal powder, silicon nitride, and metal nitride.

[II] The explosive composition according to any one of claims 1 to 10, further comprising a surfactant.

12. The explosive composition according to claim 11, wherein the surfactant is a non-one surfactant having an HLB value of 15 or less.

[13] An explosive composition molded article, wherein the fuel component and the oxidizer component according to any one of 1 to 9 above are kneaded, molded, and dried with an aqueous emulsion of a hydrophobic adhesive .

14. The explosive composition molded article according to claim 13, wherein the molded article is any one of a gas generating agent, an autoidation agent, and an engineered agent.

15. The explosive composition molded article according to claim 13 or 14, wherein the molded article is for an automobile safety device.

[16] The shape of the molded body is any one of granules, tablets, columns, cylinders, prisms, perforated cylinders, and perforated prisms, The explosive composition molded article according to item 1.

[17] The explosive composition formed article according to any one of claims 13 to 16, further comprising at least one selected from metal powder, silicon nitride, and metal nitride. .

[18] The explosive composition molded article according to any one of claims 13 to 17, further comprising a surfactant.

19. The explosive composition molded article according to claim 18, wherein the surfactant is a non-ionic surfactant having an HLB value of 15 or less.

[20] The fuel component and the oxidizer component are kneaded using a hydrophobic adhesive aqueous emulsion.

1. A method for producing an explosive composition, characterized in that it is dried in step 1.

[21] The fuel component and the oxidizer component are kneaded using a hydrophobic adhesive aqueous emulsion.

Next, a method for producing an explosive composition molded article characterized by drying and solidifying after molding.

22. The method for producing an explosive composition molded article according to claim 21, wherein the molding is extrusion molding.