WO2020133956A1 - Produit moulé d'agent générateur de gaz poreux et son procédé de préparation - Google Patents

Produit moulé d'agent générateur de gaz poreux et son procédé de préparation Download PDF

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Publication number
WO2020133956A1
WO2020133956A1 PCT/CN2019/091616 CN2019091616W WO2020133956A1 WO 2020133956 A1 WO2020133956 A1 WO 2020133956A1 CN 2019091616 W CN2019091616 W CN 2019091616W WO 2020133956 A1 WO2020133956 A1 WO 2020133956A1
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Prior art keywords
arc
generating agent
holes
gas generating
cross
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PCT/CN2019/091616
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English (en)
Chinese (zh)
Inventor
罗运强
任响宁
王秋雨
杜涛
杨志雄
王晨
张俊
张印明
刘柳
付文斌
朱李宁
Original Assignee
湖北航鹏化学动力科技有限责任公司
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Publication of WO2020133956A1 publication Critical patent/WO2020133956A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B31/00—Compositions containing an inorganic nitrogen-oxygen salt
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06D—MEANS FOR GENERATING SMOKE OR MIST; GAS-ATTACK COMPOSITIONS; GENERATION OF GAS FOR BLASTING OR PROPULSION (CHEMICAL PART)
    • C06D5/00—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets
    • C06D5/06—Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids

Definitions

  • the invention relates to a porous gas generating agent molded product and a preparation process thereof, in particular to a small porous gas generating agent molded product prepared by a compression molding process, and belongs to the technical field of airbag gas generators.
  • the automobile airbag system is composed of a gas generator that generates gas, an airbag for protection, and an exterior trim supporting the above two parts.
  • the gas generator contains a gas generating agent, which is excited when needed, and the gas generating agent burns to generate a large amount of gas, and the airbag is filled to protect personal safety.
  • the mainstream gas generating agents worldwide are guanidine nitrate and basic copper nitrate gas generating agents, guanidine nitrate is the main fuel, and basic copper nitrate is the main oxidant.
  • the shape of the tablets of this type of gas-generating agent is usually in the form of ordinary discs.
  • the general combustion process is surface-reduction combustion. The gas production in the first half of the combustion is large, which causes great damage to the airbag, easily damages the airbag, and cannot form effective protection.
  • the principle lies in that, due to the existence of porosity, the tablet burning process will be improved to surface-enhancing or iso-surface burning, or to achieve multiple stages of combustion under different conditions, improve the burning time period, and overcome the above defects.
  • solid tablets are generally used as gas generating agents in the airbag gas generating agent industry.
  • the extrusion molding method requires the use of a special binder, which has certain restrictions on the formulation, and the extrusion process is complicated and costly; the compression molding method can only compress large tablets, and the small porous tablets cannot be compressed at present, large porous or porous
  • the inner diameter and outer diameter of the tablets are large, and there are special requirements for the structure of the generator. They are generally used for tubular generators. For the cake generator, only small porous or porous tablets can be used.
  • the patent CN2786115Y discloses a molded product of a gas-generating composition, including its preparation process.
  • the pellet has a hole in it, and the tablet has a groove to increase the initial ignition surface and improve the ignition efficiency and reliability, but the patent
  • the use of hydraulic presses to press pharmaceutical tablets has low output efficiency, high requirements for molds, increased mold manufacturing costs, and large grain size, which makes it difficult to adjust the amount of drugs in the generator.
  • the patent CN1173901C discloses a gas generating agent for an airbag, which uses porous control of tablet burning time and adopts a formula with low burning rate, which can also meet the performance requirements of the generator.
  • the burning linear velocity is lower than that of conventional medicines, which improves the burning performance of tablets by changing the medicine type.
  • its pharmaceutical process adopts the method of extruding and cutting, which has higher requirements on the fluidity of pharmaceuticals and the cost of the extruding process increases.
  • the patent CN1220650A discloses a gas generating agent for an airbag.
  • the gas generating composition has low toxicity or low risk, is easy to use, has excellent combustion efficiency and gas generating efficiency, and reduces the amount of residues and energy generated during combustion. It is produced safely and has good molding strength under molding conditions.
  • the agent contains an ammonium nitrate formula and uses an extrusion molding process. Due to the extremely high hygroscopicity of the ammonium nitrate formula, it leaves a hidden danger to the safety of the generator.
  • the purpose of the present invention is to overcome the shortcomings of the prior art, and to provide a porous gas generating agent with a small size, the combustion process can realize surface-increasing or iso-surface combustion, or realize multiple stages of combustion in different conditions to improve
  • the Pt performance of the generator reduces the material cost of the gas generator.
  • Another object of the present invention is to provide a process for preparing a porous gas generating agent.
  • the process uses a guanidine nitrate and basic copper nitrate formulation to obtain particles by wet granulation, and obtains a small porous gas generating agent by compression molding.
  • the process is simple and flexible, and the production cost is low.
  • Still another object of the present invention is to provide a pressing mold for use in the manufacturing process of porous gas generating agent molded products.
  • the mold has a simple structure and flexible application, and is suitable for the preparation of molded products of porous gas generating agents of various shapes.
  • Yet another object of the present invention is to provide applications of porous gas generating agents.
  • a porous gas-generating agent molded product which is a columnar body with a plurality of holes inside in the height direction, wherein the ratio of the height of the columnar body to the maximum size of the cross-section is 0.3 to 1.8; the columnar body is porous
  • the ratio of the total cross-sectional area to the total cross-sectional area of the columnar body ranges from 0.03 to 0.15.
  • the pores are randomly distributed inside the columnar body, preferably uniformly or symmetrically.
  • the maximum cross-sectional size of the columnar body is in the range of 2.0 to 20 mm
  • the height of the columnar body is in the range of 2.0 to 20 mm
  • the maximum cross-sectional size of the hole is 0.5 to 5 mm Within range.
  • the maximum cross-sectional size of the columnar body is in the range of 3-15 mm, the height is in the range of 2.0-10 mm, and the maximum cross-sectional size of the hole is in the range of 0.8-4 mm.
  • the maximum size of the cross section of the columnar body is in the range of 5-15 mm, the height is in the range of 2.0-10 mm, and the maximum size of the hole cross-section is in the range of 0.8-4 mm.
  • the largest dimension of the cross section of the columnar body is in the range of 5-12 mm, the height is in the range of 2.0-8 mm, and the largest dimension of the cross section of the hole is in the range of 0.8-3 mm.
  • the maximum dimension of the cross-section of the columnar body is in the range of 8-10 mm, the height is in the range of 3.0-7.5 mm, and the maximum dimension of the cross-section of the hole is in the range of 0.8-2 mm Inside.
  • the cross-section of the columnar body is selected from a circle, an equilateral triangle with rounded corners, a rounded quadrilateral, a clover shape, a four-leaf clover shape, or is composed of a straight line, a curve or an arc Any one of the closed shapes, as shown in Figure 1.
  • FIG. 2a which includes a first arc, a second arc, a third arc, a fourth arc, a fifth arc and
  • the sixth arc is a closed shape formed by connecting end to end in a clockwise direction, wherein the second arc is tangent to the first arc and the third arc respectively, and the fourth arc is connected to the third arc
  • the fifth arc is tangent respectively, the sixth arc is tangent to the first arc and the fifth arc respectively; the first arc, the third arc and the fifth arc of the cross section of the cylindrical body
  • the arcs are concentric with the corresponding holes; the opening directions of the first arc, the third arc, and the fifth arc are toward the inside of the closed shape, the center line of the arc is an equilateral triangle, and the radius is R1, the range of R1 1 ⁇ 10mm; the opening direction of the second arc, the fourth arc is connected to the third arc
  • the fifth arc is tangent respectively,
  • FIG. 2b The above porous gas generating agent molded product, the cross-sectional shape of the columnar body is shown in FIG. 2b, which includes a first arc, a second arc, a third arc, a fourth arc, a fifth arc, A sixth circular arc, a seventh circular arc, and an eighth circular arc in a clockwise direction, a closed shape formed by connecting end to end, wherein the second circular arc is tangent to the first circular arc and the third circular arc, respectively, The fourth arc is tangent to the third arc and the fifth arc, the sixth arc is tangent to the fifth arc and the seventh arc, the eighth arc is equal to the first arc
  • the seventh circular arcs are tangent; the first circular arc, the third circular arc, the fifth circular arc, and the seventh circular arc of the cross section of the columnar body are concentric with the corresponding holes respectively; the first circular arc ,
  • the number of the holes can be arbitrarily selected, preferably the number of holes is the same as the number of odd-numbered arcs of the corresponding columnar body.
  • the porous is a cylindrical, square, rectangular or any shape that can penetrate the gas-generating agent compressed product as shown in FIG. 3a.
  • the porous is cylindrical, square, rectangular, or any other shape that does not penetrate as shown in FIG. 3b or has partial pores as shown in FIG. 3c.
  • the pores may be distributed arbitrarily within the columnar body, preferably the pores are uniformly or symmetrically distributed in the gas generant compressed product.
  • the invention also provides a preparation process of the above-mentioned porous gas-generating agent molded product.
  • the preparation process is: mixing raw material components containing at least fuel and an oxidant to obtain a direct mixture, or granulating to obtain a granulated material , The directly mixed material or the granulated material is loaded into a compression mold, and the compressed gas-forming agent molded product with holes is obtained by compression molding.
  • the content of the fuel is 35% to 60%; the content of the oxidant is 25% to 58%; the fuel is selected from guanidine nitrate and aminoguanidine Nitrate, melamine cyanurate, melamine, nitroguanidine, 5-aminotetrazole, 3-nitro-1,2,4-triazol-5-one, amidinourea copper nitrate, ammonium nitrate, bistetrazolium One or more of salt, bistetrazolium potassium salt, NTO, new energy-containing materials FOX7, FOX12, TKX-50, LLM-105; the oxidant is selected from metal basic nitrate, metal basic carbonate , One or more of metal nitrate, ammonium perchlorate, metal perchlorate, chlorate; functional additives are metal titanate, titanium dioxide, strontium titanate, aluminum hydroxide, aluminum oxide, kaolin , One or more of copper phthalocyanine, boron
  • the particle size of the granulated material is 10 to 200 mesh, and the particle bulk density is 0.5 g/cm 3 to 2.0 g/cm 3 .
  • the compression molding equipment is a rotary tablet press
  • the number of punching groups of the rotary tablet press is in the range of 6-100 punches
  • the compression capacity of the rotary tablet press is in the range of 1-30t
  • the rotation speed is 1 ⁇ 25 rpm.
  • the present invention also provides a pressing die used in the preparation process of the present invention, as shown in FIG. 4, the pressing die includes an upper punch 4-1, a middle die 4-5, a lower punch 4-8 and a core
  • the rod 4-13; the middle mold 4-5 is provided with a through hole 4-6; through the upper punch, the lower punch and the movement of the core rod, the hole-type gas generating agent molded product is formed in the middle mold by pressing.
  • the number, shape, and size of the core rods 4-13 correspond to the number, shape, and size of the porous inside the columnar body; the internal through holes 4- of the middle mold 4-5
  • the shape and size of 6 correspond to the external shape and size of the molded product of the porous gas generant; the end faces of the upper punch 4-1 and the lower punch 4-8 respectively correspond to the outer shape of the upper and lower end faces of the columnar body correspond.
  • the upper punch 4-1 and the lower punch 4-8 can be provided with the corresponding number, shape and size of through holes 4-2 and 4 according to the number, shape and size of the core rod 4-13 -11, you can also choose not to set holes or set a part of the number of holes according to the needs of the medicine type.
  • the upper punch 4-1 and the lower punch 4-8 have through holes 4-2 and 4-11 corresponding to the number, shape, and size of the core rods 4-13,
  • the plurality of core rods extend from the through holes 4-11 corresponding to the lower punch, as shown in FIG. 4a, the upper punch and the lower punch move simultaneously, and the core rods extend into the upper punch through holes 4-2,
  • the inner mold 4-5 through holes 4-6 are pressed to form a gas-generating agent molded product with multiple through holes.
  • the undercuts 4-8 have through holes 4-11 corresponding to the number, shape, and size of the core rods 4-13.
  • the through hole extends, the upper punch 4-1 does not have a hole or a part of the hole corresponding to the core rod, the upper punch and the lower punch move at the same time, by adjusting the length of the core rod and the gas generating agent in
  • the gas-generating agent molded product with multiple non-through holes or the gas-generating agent molded product with multiple through and non-through holes at the same time is finally pressed into the middle mold through holes 4-6.
  • the upper punch 4-1 and the lower punch 4-8 have through holes 4-2 and 4-11 corresponding to the number, shape and size of the core rod,
  • a core rod 4-13 extends from the through hole corresponding to the upper punch, the upper punch and the lower punch move at the same time, the core rod extends into the lower punch through hole, and finally is made by pressing in the middle die through hole 4-6 Gas-generating agent molded product with multiple through holes.
  • the upper punch has a through hole 4-2 corresponding to the number, shape, and size of the core rods 4-13, and the core rod extends from the through punch through hole Out
  • the lower punch 4-8 does not have holes inside or has some holes corresponding to the core rod
  • the upper punch and the lower punch move at the same time, and are pressed in the middle mold by adjusting the length of the core rod and the gas generating agent
  • a plurality of gas-generating agent molded products with non-through holes or a gas-generating agent molded product with multiple through and non-through holes are simultaneously pressed in the middle mold through holes 4-6.
  • the upper punch 4-1 and the lower punch 4-8 have through holes 4-2 and 4-11 corresponding to the number, shape, and size of the core rods 4-13,
  • the plurality of core rods protrude from the through holes corresponding to the upper punch and the lower punch, the upper punch and the lower punch move simultaneously, by adjusting the length of the core rod and the gas generating agent in the middle mold 4-5
  • the gas-generating agent molded product having a plurality of through holes or a plurality of non-through holes or a plurality of through and non-through holes at the same time is finally pressed into the middle mold through holes 4-6.
  • the working parts of the upper punch 4-1, the lower punch 4-8, the middle die 4-5, and the core rod 4-13 are provided with a plating layer, and the middle die is composed of two types of inner and outer Material composition, external material hardness is lower than internal material hardness.
  • the internal and external materials are connected by welding. The low hardness of the external material facilitates processing, and the high hardness of the internal material is beneficial to the shape of the molding agent.
  • a chamfer is provided at the connection between the outer side surface of the middle mold and the upper and lower end surfaces, so that the middle mold enters the rotary tableting device; the opening edge of the inner through hole 4-6 of the middle mold is provided with an inverted The angle is used to guide the entrance of the die up and down.
  • the plurality of core rods can be fixedly arranged on the core rod base body and integrated with the core rod base body, and the core rod mold is generally easy to disassemble, as shown in FIG. 4c.
  • the multiple core rods can also be separated from the core rod base. These core rods are replaceable, and need to be installed and fixed in the corresponding holes in the core rod base during use, as shown in FIG. 5.
  • the upper punching side is provided with a discharge hole 4-3 corresponding to each through-hole.
  • the core rod can be removed when passing through the upper punching through-hole
  • the excess material attached to the core rod can be extended to extend the durability of the mold.
  • the upper punch, the lower punch, the middle die and the core rod are all provided with positioning units, and the positioning unit includes a positioning groove, a positioning hole or a positioning key to realize the upper punch, the lower punch,
  • the middle mold corresponds to multiple core rods.
  • the invention also provides the application of the porous gas generating agent molded product, which is applied to systems such as automobile airbag gas generators, fire extinguishers, solid oxygen generators or lifeboat inflators.
  • the present invention has the following beneficial effects:
  • the molded product of the porous gas-generating agent of the present invention adjusts the combustion surface of the gas-generating agent, reduces the initial combustion surface, and burns the gas-generating agent into an equal surface or an increased surface, or multiple stages of combustion under different conditions.
  • the combustion surface of the first half of the agent is smaller than the flake gas generating agent, which protects the airbag under the pressure of high-temperature gas injection, and the gas production rate in the second half is accelerated.
  • the continuous inflation of the airbag ensures the timely deployment of the airbag and adopts a porous Gas generating agent, which can adjust the burning duration of the agent, can continuously supply gas to the air bag, improve the protection efficiency and protection time for people, and improve the suitability of the use of the air bag; and the molded product of the porous gas generating agent of the present invention has a small size , Suitable for all types of generators.
  • the molded product of the porous gas-generating agent of the present invention has a larger burning surface when the size is the same, so the formula with low burning rate and low burning temperature can be used; and the burning is more complete without leaving behind
  • the unused tablets have a higher utilization rate of gas generating agents.
  • the PT curve of the porous gas-generating agent molded product of the present invention in the gas generator is a smooth curve, the slope in the early stage is low, the slope in the middle stage is high and stable, the slope in the later stage is low and the decline is gentle, and the pressure retention time in the later stage can also be extended , Excellent performance.
  • the molded product of the porous gas-generating agent of the present invention can achieve intelligent dual-stage or multi-stage combustion, that is, when one area of the tablet is completely burned, about 30% of the other area is still not burned out. Realize the function of some bipolar generators.
  • the molded product of the porous gas-generating agent of the present invention can maintain part of the drug form after combustion, and has the advantages of less residue after combustion, low internal pressure, and adjustable burning rate. Quantify.
  • the compression molding method is adopted, the preparation process is simple, efficient, easy to operate and control, and the output is high.
  • FIG. 1 is a schematic diagram of the shape and hole layout of the porous gas generating agent molded product of the present invention, wherein FIG. 1a is a porous gas generating agent molded product with a cross-sectional shape of two holes with a full arc shape, and FIG. 1b is a cross-sectional shape with two circular arcs and a straight line.
  • Fig. 2 is a schematic diagram of arc connection of porous gas generating agent molded products of the present invention, wherein Fig. 2a is a front view of a porous gas generating agent molded product connected with a six-segment arc similar to a triangle, and Fig. 2b is similar to an eight segment arc connection Front view of molded product of porous gas generating agent in quadrilateral;
  • FIG. 3 is a schematic view of a molding method of a porous gas generating agent molded product hole of the present invention, wherein FIG. 3a is a through hole, FIG. 3b is a non-through hole, and FIG. 3c is a part of the number of through holes and a part of the number of non-through holes;
  • FIG. 4 is a schematic diagram of the pressing die of the present invention, wherein FIG. 4a is a combination of pressing dies when the core rod is extended from the lower punch, FIG. 4b is the lower punch, and FIG. 4c is the core rod with an increased diameter;
  • 4- 1 represents upper punch
  • 4-2 represents upper punch through hole
  • 4-3 represents upper punch discharge hole
  • 4-4 represents upper punch working end
  • 4-5 represents middle die
  • 4-6 represents middle die inner hole
  • 4 -7 represents the middle die fixing groove
  • 4-8 represents the down punch
  • 4-9 represents the core rod and core rod body as a whole
  • 4-9 represents the overall fixed end of the core rod
  • 4-11 represents the under punch through hole
  • 4 -12 represents the working end of the punch
  • 4-13 represents the core rod and its working end
  • 4-14 represents the part of the core rod that increases the diameter and increases the strength
  • 4- 1 represents upper punch
  • 4-2 represents upper punch through hole
  • 4-3 represents upper punch discharge hole
  • 4-4 represents upper punch working end
  • 4-5
  • Figure 5 is the overall core rod assembled in the pressing mold of the present invention.
  • FIG. 6 is a schematic diagram of a two-hole gas generating agent in Example 1, wherein FIG. 6a is a schematic view of a two-hole gas generating agent at a natural angle, and FIG. 6b is a front view of the two-hole gas generating agent;
  • FIG. 7 is a schematic view of a triangular three-hole gas generating agent in Example 2, wherein FIG. 7a is a schematic view of a triangular three-hole gas generating agent at a natural angle, and FIG. 7b is a front view of the triangular three-hole gas generating agent and a cross-sectional line along FIG. 7a. Cutaway view
  • FIG. 8 is a schematic view of a special-shaped three-hole gas-generating agent of Example 3, wherein FIG. 8a is a schematic view of a special-shaped three-hole gas-generating agent at a natural angle, and FIG. 8b is a front view of the special-shaped three-hole gas-generating agent and a cross-sectional view along the section line of FIG. 8a ;
  • FIG. 9 is a schematic diagram of a rounded quadrilateral three-hole gas generating agent in Example 4, wherein FIG. 9a is a natural angle of the rounded quadrilateral three-hole gas generating agent, and FIG. 9b is a front view of the rounded quadrilateral three-hole gas generating agent;
  • Example 10 is a P-T curve diagram of the compressed product of the gas generating agent in Example 1 and Example 2 in the gas generator;
  • Example 11 is a P-T curve diagram of the compressed product of the gas generating agent in Example 3 and Example 4 in the gas generator;
  • FIG. 12 is a P-t curve chart of the comparative three-hole gas generating agent in Comparative Example 1 compared with the ordinary disk gas generating agent;
  • FIG. 13 is a P-t curve chart comparing the heterogeneous three-hole gas generating agent and the single-hole gas generating agent in Comparative Example 2;
  • Fig. 14 is a schematic diagram of a round-cone three-hole gas generating agent in Comparative Example 3 and a Pt curve chart comparing with a special-shaped three-hole gas generating agent, wherein Fig. 14a is a schematic view of a natural truncated three-hole gas generating agent, and Fig. 14b is the circle The front view of the mesa-shaped three-hole gas generating agent and the cross-sectional view along the section line of FIG. 14a, and FIG. 14c is the Pt curve of the contrast between the mesa-shaped three-hole gas generating agent and the shaped three-hole gas generating agent;
  • FIG. 15 is a P-t curve chart of the comparison between the rounded quadrilateral three-hole gas generating agent and the ordinary disk gas generating agent in Comparative Example 4.
  • FIG. 15 is a P-t curve chart of the comparison between the rounded quadrilateral three-hole gas generating agent and the ordinary disk gas generating agent in Comparative Example 4.
  • the preparation process of the porous gas generating agent includes the following steps:
  • the raw material components containing at least fuel and oxidant are mixed to obtain the first material; the mixing is performed in a mixing device with a mixing time of 15 minutes.
  • the mixing device may be a V-type mixer, a three-dimensional multidirectional motion mixer, Automatic lifting hopper mixer, ribbon mixer or acoustic resonance mixer; wherein, the fuel is guanidine nitrate, its content is 50%, the oxidant is basic copper nitrate, its content is 31.75%, the auxiliary oxidant It is ammonium perchlorate, the content of which is 2%; the form-retaining agents are strontium titanate and strontium nitrate, the contents of which are 5.5% and 9.75%; in addition, the first material also includes a functional aid to help demolding
  • the agent is talc and graphite, and their contents are 0.75% and 0.25%, respectively.
  • the wet mixing equipment is a kneader or mixer ,
  • kneader horizontal kneader, vertical kneader, ribbon mixer or acoustic resonance mixer.
  • the third material is dried to a moisture content less than 0.5% of the total mass of the third material, and then passed through a 10-40 mesh screen to obtain the fourth material;
  • the drying equipment can be an electric heating oven or an oil bath oven , Steam oven, double cone oven, vibrating fluidized bed or vacuum desiccant.
  • the molding equipment may be a rotary tablet press or a powder molding machine.
  • This application uses a rotary tablet press, which specifically includes the following steps:
  • the fourth material is made into the prefabricated porous gas-generating agent under the upper and lower punching and pressing of the core rod of the rotary tablet press;
  • the shape of the porous gas-generating agent molded product prepared by the present application can be any columnar body, the maximum dimension D of the cross section of the columnar body is in the range of 2.0 to 20 mm, and the height H is in the range of 2.0 to 20 mm, and the porous is a through or non-through cylinder Shape, square, rectangle or any other shape, the diameter d of each hole of the porous is in the range of 0.5 to 5mm.
  • the porous gas generating agent molded product prepared by the invention is mainly used for automobile airbag gas generators.
  • the maximum cross-sectional dimension of the columnar body is denoted as D
  • the maximum cross-sectional dimension of the hole is denoted as d
  • the height of the columnar body is denoted as H.
  • the real-time working capacity of the rotary tablet press is 8.0t.
  • the two-hole gas-generating agent prepared above is loaded into a PAB test generator to perform P-t performance test.
  • the test results are shown in Table 1, and the P-t test curve is shown in FIG. 10.
  • the above two-hole gas generating agent is used in the PAB generator, the maximum pressure is 355KPa, the pressure is only 56KPa in 10ms, Slope1 (slope) is 6.43, Slope3 (slope) is 8.60, the data shows that the two The hole gas-generating medicine has a small impact force on the air bag when it is deployed, the gas-generating pressure is stable, and the air bag is not likely to be torn or damaged, and the design strength of the air bag module assembly is low, thereby reducing the design cost.
  • the slope of the early P-t curve rises smoothly, indicating that the burning rate of the porous gas generating agent is stable.
  • the real-time working capacity of the rotary tablet press is 7.5t.
  • the above triangular three-hole gas generating agent is used in the PAB generator, the maximum pressure is 356KPa, the pressure is only 42kPa in 10ms, Slope1 (slope) is 5.00, Slope3 (slope) is 9.40, the early slope is low
  • Slope1 (slope) is 5.00
  • Slope3 (slope) is 9.40
  • the early slope is low
  • the impact force when the air bag is deployed is small, and the air bag is not easy to produce tearing and damage.
  • the high slope in the later stage helps the air bag to expand and maintain a full state for a long time.
  • the design strength of the air bag module assembly is low, which reduces the design. cost.
  • the slope of the early P-t curve rises smoothly, indicating that the burning rate of the porous gas generating agent is stable.
  • the real-time working capacity of the rotary tablet press is 8.2t.
  • the three-hole gas-generating agent prepared above is loaded into a PAB test generator to perform P-t performance test.
  • the test results are shown in Table 3, and the P-t test curve is shown in FIG. 11.
  • the above-mentioned special-shaped three-hole gas generating agent is used in the PAB generator, the maximum pressure is 373KPa, the pressure is only 44KPa in 10ms, Slope (slope) is 5.23, Slope3 (slope) is 9.90, the early slope is low
  • Slope (slope) is 5.23
  • Slope3 (slope) is 9.90
  • the early slope is low
  • the slope of the P-t curve in the early stage rises steadily, indicating that the burning rate of the shaped three-hole gas generating agent is stable.
  • the real-time working capacity of the rotary tablet press is 9.1t.
  • the rounded quadrilateral three-hole gas-generating agent prepared above is loaded into a PAB test generator to perform P-t performance test.
  • the test results are shown in Table 4, and the P-t test curve is shown in FIG. 11.
  • the above-mentioned special-shaped three-hole gas generating agent is used in the PAB generator.
  • the maximum pressure is 364KPa and the pressure is only 25KPa in 10ms.
  • the low slope at the early stage has little impact on the deployment of the air bag, and the air bag is not easy to produce.
  • Slope (slope) is 3.01
  • Slope3 (slope) is 11.90.
  • the later slope is high, which helps the airbag to expand and maintain a full state for a long time.
  • a disk-shaped gas generating agent was prepared using the same formula as in Example 3, with an outer diameter D of 5 mm and a thickness H of 1.9 mm.
  • the irregular-shaped three-hole gas generating agent prepared in Example 3 and the above-mentioned disk-shaped gas generating agent were loaded into a PAB test generator to perform Pt performance test.
  • the external pressure test results are shown in Table 5, and the external pressure Pt curve is shown in FIG. 12 Show.
  • the three-hole gas-generating agent of the present invention has a pressure of 10 ms and a pressure of 20 ms lower than that of a common wafer gas-generating agent under the same charge amount.
  • the disk-shaped gas-generating agent, and the P95 pressure of the three-hole gas-generating agent is higher than that of the disk-shaped gas-generating agent, indicating that the early output pressure of the three-hole gas generating agent is small, which is beneficial to the deployment of the airbag, and the later output pressure is large, which is beneficial to the airbag. Extension of hold time.
  • Cylindrical single-hole tablets were prepared using the same formula and process as in Example 3.
  • the prepared single-hole gas generating agent and the irregular-shaped three-hole gas generating agent prepared in Example 3 were loaded into a PAB test generator for Pt performance test.
  • the external pressure test results are shown in Table 6, and the external pressure Pt curve is shown in Figure 13.
  • the three-hole gas-generating agent of the present invention compares with the single-hole gas-generating agent.
  • the porous gas-generating agent has a pressure of 10 ms and 20 ms lower than that of the single-hole gas-generating agent. It shows that the early output pressure is small, which is beneficial to the deployment of the airbag, and the later output pressure is large, which is beneficial to the extension of the airbag retention time.
  • a round table-shaped three-hole medicinal gas-generating agent was prepared using the same formula and process as in Example 3, and the prepared round table-shaped three-hole medicinal gas-generating agent and the three-hole gas-generating agent prepared in Example 3 were loaded into a PAB test generator , Pt performance test, the external pressure test results are shown in Table 7, the external pressure Pt curve shown in Figure 14.
  • the heterogeneous three-hole gas-generating agent of the present invention is compared with the round-table three-hole gas-generating agent. Under the same charge amount, the heterogeneous three-hole gas-generating agent has a pressure of 10ms and 20ms lower than that of the round-table three. Hole gas generating agent, the pressure-shaped three-hole gas generating agent in the later 40ms is higher than that of the round table three-hole gas generating agent. It shows that the early output pressure is small, which is beneficial to the deployment of the airbag, and the later output pressure is large, which is beneficial to the extension of the airbag retention time.
  • Example 4 Using the same formula and process as in Example 4, an ordinary disk gas generating agent was prepared.
  • the prepared ordinary disk gas generating agent and the rounded quadrilateral three-hole gas generating agent prepared in Example 4 were loaded into a PAB test generator. Carry out Pt performance test.
  • the external pressure test results are shown in Table 8.
  • the external pressure Pt curve is shown in Figure 15.
  • the three-hole rounded quadrangular gas generating agent of the present invention is compared with the ordinary disk gas generating agent.
  • the three-hole rounded quadrangular gas generating agent has a pressure of 10ms and a pressure of 20ms It is lower than the ordinary disk gas generating agent, and the 40ms pressure three-hole rounded quadrilateral gas generating agent is higher than the ordinary disk gas generating agent in the later 40ms. It shows that the small output pressure in the early stage will not cause the air bag to tear, and the large output pressure in the later stage is beneficial to the deployment of the airbag and is beneficial to the extension of the airbag retention time.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Air Bags (AREA)

Abstract

La présente invention concerne un produit moulé d'agent générateur de gaz poreux et son procédé de préparation. Le produit moulé d'agent générateur de gaz poreux est un corps colonnaire ayant une pluralité de trous agencés dans la direction de hauteur à l'intérieur de celui-ci. Le rapport de la hauteur à la plus grande dimension de la section transversale du corps colonnaire est dans une plage de 0,3 à 1,8, et le rapport de la surface totale de la section transversale d'une pluralité de trous du corps colonnaire à la surface totale de la section transversale du corps colonnaire est dans une plage de 0,03 à 0,15. Le processus de combustion de l'agent générateur de gaz poreux comprimé peut réaliser une combustion à surface égale ou une combustion progressive, ou de multiples étages de combustion dans différentes conditions, et peut ajuster les performances P-t d'un générateur de gaz en fonction des exigences, ce qui permet de réduire les coûts de matériau du générateur de gaz et la qualité du générateur. L'agent générateur de gaz poreux comprimé est principalement utilisé pour des générateurs de gaz d'airbags automobiles. La présente invention utilise un procédé de moulage par compression, et, pour la première fois, réalise l'utilisation d'un moulage par compression pour préparer un petit agent générateur de gaz poreux, rendant le processus de préparation simple, efficace et facile à utiliser et à commander.
PCT/CN2019/091616 2018-12-29 2019-06-18 Produit moulé d'agent générateur de gaz poreux et son procédé de préparation WO2020133956A1 (fr)

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CN109809954B (zh) * 2018-12-29 2021-02-09 湖北航鹏化学动力科技有限责任公司 一种多孔产气剂模压制品及其制备工艺

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CN101622212A (zh) * 2007-03-27 2010-01-06 奥托里夫Asp股份有限公司 制造单片式气体发生剂颗粒的方法
CN102248700A (zh) * 2011-04-27 2011-11-23 聊城万合工业制造有限公司 多孔片剂模具
CN107556146A (zh) * 2017-08-31 2018-01-09 西安近代化学研究所 一种多孔推进剂无溶剂压伸成型模具及压伸工艺
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CN109809954A (zh) * 2018-12-29 2019-05-28 湖北航鹏化学动力科技有限责任公司 一种多孔产气剂模压制品及其制备工艺

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