EP0853603B1 - Molded gas generating compositions containing a quick cure hydroxyl-terminated binder system and process for producing the same - Google Patents

Molded gas generating compositions containing a quick cure hydroxyl-terminated binder system and process for producing the same Download PDF

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Publication number
EP0853603B1
EP0853603B1 EP96929767A EP96929767A EP0853603B1 EP 0853603 B1 EP0853603 B1 EP 0853603B1 EP 96929767 A EP96929767 A EP 96929767A EP 96929767 A EP96929767 A EP 96929767A EP 0853603 B1 EP0853603 B1 EP 0853603B1
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EP
European Patent Office
Prior art keywords
gas
generating composition
weight percent
hydroxyl
molded
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Expired - Lifetime
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EP96929767A
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German (de)
French (fr)
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EP0853603A1 (en
EP0853603A4 (en
Inventor
Robert S. Scheffee
Merlin W. Larimer
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Atlantic Research Corp
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Atlantic Research Corp
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Classifications

    • 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
    • C06B45/04—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive
    • C06B45/06—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component
    • C06B45/10—Compositions or products which are defined by structure or arrangement of component of product comprising solid particles dispersed in solid solution or matrix not used for explosives where the matrix consists essentially of nitrated carbohydrates or a low molecular organic explosive the solid solution or matrix containing an organic component the organic component containing a resin
    • 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 present invention relates to inflators for devices such as protective passive restraints or "air bags” used in motor vehicles, escape slide chutes, life rafts, and the like. More particularly, the present invention relates to molded gas-generating compositions according to claim 8 which are used in inflators and a method according to claim 1.
  • Inflation is generally accomplished by means of a gas, such as air, nitrogen, carbon dioxide, helium, and the like which is stored under pressure and further pressurized and supplemented at the time of use by the addition of high temperature combustion gas products produced by the burning of a gas-generating composition.
  • a gas such as air, nitrogen, carbon dioxide, helium, and the like which is stored under pressure and further pressurized and supplemented at the time of use by the addition of high temperature combustion gas products produced by the burning of a gas-generating composition.
  • the inflation gases are solely produced by gas-generating compositions.
  • gas-generating compositions are incorporated into mechanical inflator devices in the form of powders, grains, pellets, or the like.
  • a particular convenient manner to incorporate gas-generating compositions into inflator devices is to form or mold the compositions into solid structures.
  • molded gas-generating components In order to be moldable they generally include binder components, some of which are suspected to produce hazardous combustion products.
  • binder components some of which are suspected to produce hazardous combustion products.
  • PVC polyvinyl chloride
  • PCB's polychlorinated biphenyls
  • the present invention is directed to the use in the method of claim 1 of moldable gas-generating compositions which do not include binder components which are suspected of producing harmful combustion products. More particularly, the present invention is directed to the use in the method of claim 1 of moldable gas-generating compositions which avoid the use of polyvinyl chloride (PVC) binders.
  • PVC polyvinyl chloride
  • Gas-generating compositions containing hydroxyl terminated polybutadiene are known from EP 0194180 for use in gun propellant, from US4184031 for use in vorket propellants and from EP 0685368 (prior art as defined in Ar 54(3) EPC) for use in hydrid air bag inflation systems.
  • Another object of the present invention is to use gas-generating compositions which can be injection molded or extruded.
  • a further object of the present invention is to use moldable gas-generating compositions which do not include polyvinyl chloride binder components.
  • a still further object of the present invention is to use moldable gas-generating compositions which include hydroxyl terminated polybutadiene (HTPB) binder systems.
  • HTPB hydroxyl terminated polybutadiene
  • a still further object of the present invention is to use moldable gas-generating compositions which can be quick cured.
  • a still further object of the present invention is to use moldable gas-generating compositions which can be cured in approximately 7 minutes or less.
  • a yet further object of the present invention is to provide a method of molding gas-generating compositions according to claim 1.
  • a yet further object of the present invention is to provide a method of molding gas-generating compositions which include hydroxyl terminated polybutadiene (HTPB) binder systems which can be quick cured.
  • HTPB hydroxyl terminated polybutadiene
  • the present invention provides a molded gas-generating composition according to claim 8 which includes:
  • the present invention further provides a method of forming a molded gas-generating according to claim 1 which comprises:
  • the present invention further provides an inflator for inflating emergency devices which inflator includes a molded gas-generating composition according to claim 8 that consists essentially of an oxidizer component and a hydroxyl-terminated polybutadiene binder component.
  • the present invention is directed to the use in the method of claim 1 of gas-generating compositions which, upon ignition, rapidly generate large amounts of gaseous reaction products.
  • the gas-generating compositions used in the present invention are moldable. In this regard, they can be prepared so as to have a suitable viscosity for injection molding, extrusion, or the like. After molding the composition can be cured to form solid structures
  • the gas-generating compositions are molded into solid shapes which are incorporated into mechanical inflator devices such as protective passive restraints or "air bags” used in motor vehicles, escape slide chutes, life rafts, or the like.
  • the present gas-generating compositions can be used in conjunction with inflator devices which primarily rely upon stored pressurized gas, and combustible gas-generating compositions to supplement the pressure of the stored gas at the time of use.
  • the present gas-generating compositions can be used as the primary source of gas used to inflate an inflation device.
  • the molded gas-generating compositions of the present invention can be ignited by a conventional initiator or ignitor.
  • a conventional initiator or ignitor For example, when used in conjunction with protective passive restraints or "air bags" used in motor vehicles, electric squibs which are activated upon a sensed impact of the motor vehicle can be used to ignite the gas-generating compositions.
  • the gas-generating compositions used in the present invention according to claim 8 include an oxidizer component, a binder component which serves as a fuel, a curing agent for the binder component, and a cure catalyst.
  • the essential components include the oxidizer component and the binder component.
  • the curing agent and cure catalyst can be considered essential components. However, it is to be understood that the cure catalyst is only necessary when one desired to quicken the curing rate of the compositions.
  • Suitable oxidizers which can be used in the gas-generating compositions include alkali metal chlorates, alkali metal perchlorates, and mixtures thereof. Examples of these oxidizers include sodium chlorate, potassium chlorate, lithium chlorate, sodium perchlorate, potassium perchlorate, and lithium perchlorate. Other oxidizers which can be use include alkaline earth metal perchlorates and ammonium perchlorate.
  • One oxidizer which has been found to be particularly useful for purposes of the present invention is potassium perchlorate.
  • the binder component used in the gas-generating compositions is a hydroxyl-terminated polybutadiene (HTPB).
  • HTPB hydroxyl-terminated polybutadiene
  • This binder functions as both a binder and a fuel component in the composition.
  • Hydroxyl-terminated polybutadiene has been found to be a desirable binder component since it does not produce hazardous compounds upon combustion.
  • a curing agent for the binder component is included in the gas-generating composition.
  • the curing agent causes the binder component to cure during the molding process.
  • Curing agents include isocyanates and diisocyanates, particularly di-polyfuncational diisocyanates.
  • exemplary curing agents include hexamethylene diisocyanate, poly phenylmethylene isocyanate, isophorone diisocyanate, dimeryl diisocyanate, and the like.
  • a cure catalyst is included in the gas-generating compositions.
  • the cure catalyst accelerates the curing speed of the gas-generating compositions so that they can be quick cured after molding.
  • the curing catalysts are selected from the group consisting of triphenylbismuth, dibutyltin dilaurate, and mixtures thereof.
  • the curing catalyst accelerates the curing of the gas-generating compositions so that they can be molded quickly.
  • the oxidizer component comprises about 83 to 95 weight percent of the gas-generating compositions
  • the binder component and the curing agent together comprise about 5 to 17 weight percent of the composition
  • the cure catalyst comprises about 0.025 to 0.5 weight percent of the composition.
  • the oxidizer component comprises about 85 to 90 weight percent of the gas-generating compositions
  • the binder component and the curing agent together comprise about 10 to 15 weight percent of the composition
  • the cure catalyst comprises about 0.025 to 0.5 weight percent of the composition.
  • the oxidizer component comprises about 88 weight percent of the gas-generating compositions
  • the binder component and the curing agent together comprise about 11.8 to 11.9 weight percent of the composition
  • the cure catalyst comprises about 0.1 to 0.2 weight percent of the composition.
  • the gas-generating compositions used in the present invention have a cure rate of less than 7 minutes and more typically between about 3 to 5 minutes, over a temperature range of about 93.3 to 190.6°C (200 to 375°F).
  • the curing rate of the gas-generating compositions used in the present invention is dependent upon the curing temperature, as one would expect. The fastest curing times are obtained at higher curing temperatures.
  • the upper limit of the curing temperature is just below the decomposition temperature of the composition. Therefore, for purposes of the present invention, the upper cure temperature should be limited to about 190.6°C (375°F)
  • a composition which included about 88 weight percent of the oxidizer component, about 11.8 to 11.9 weight percent of the binder component, and about 0.1 to 0.2 weight percent of the cure catalyst was found to have a curing rate of between about 3 to 5 minutes at 176.7°C (350°F).
  • the gas-generating compositions used in the present invention are prepared by mixing the individual components together.
  • the binder component and oxidizer component can be premixed together. It is preferred to add the curing agent and cure catalyst to the binder component and oxidizer component just prior to molding or extruding the composition so that the composition does not begin to cure prematurely.
  • the components can be mixed together utilizing conventional mixers, blenders, mills, etc. which are known to be useful for mixing pyrotechnic compositions.
  • an extrudable mass of the composition is prepared by mixing the components together.
  • the extrudable mass is then fed into an extruder, extruded and blocked as desired.
  • the extrudable mass is extruded, cut free and cured.
  • the viscosity of the mixed composition can be adjusted as necessary by incorporating a removable solvent such as ethyl acetate, acetone, ethyl alcohol, or mixtures thereof.
  • a removable solvent such as ethyl acetate, acetone, ethyl alcohol, or mixtures thereof.
  • the necessary viscosity for extrusion (or injection molding) can easily be determined based upon the specifications of the processing equipment used.
  • a preferred stabilizer used in the examples which follow includes Triphenylbismuth, Maleic Anhydride, and Magnesium Oxide used together in substantially equal proportions or about 2:1:1.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Molecular Biology (AREA)
  • Combustion & Propulsion (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Air Bags (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Description

Technical Field
The present invention relates to inflators for devices such as protective passive restraints or "air bags" used in motor vehicles, escape slide chutes, life rafts, and the like. More particularly, the present invention relates to molded gas-generating compositions according to claim 8 which are used in inflators and a method according to claim 1.
Background Art
Many devices, such as protective passive restraints or "air bags" used in motor vehicles, escape slide chutes, life rafts, and the like, are normally stored in a deflated state and are inflated with gas at the time of need. Such devices are generally stored and used in close proximity to humans and, therefore must be designed with a high safety factor which is effective at all times.
Inflation is generally accomplished by means of a gas, such as air, nitrogen, carbon dioxide, helium, and the like which is stored under pressure and further pressurized and supplemented at the time of use by the addition of high temperature combustion gas products produced by the burning of a gas-generating composition. In some cases, the inflation gases are solely produced by gas-generating compositions.
The components of gas-generating compositions are incorporated into mechanical inflator devices in the form of powders, grains, pellets, or the like. A particular convenient manner to incorporate gas-generating compositions into inflator devices is to form or mold the compositions into solid structures.
One concern with molded gas-generating components is that in order to be moldable they generally include binder components, some of which are suspected to produce hazardous combustion products. For example, polyvinyl chloride (PVC) is suspected of producing polychlorinated biphenyls (PCB's) when it is combusted at elevated temperatures.
The present invention is directed to the use in the method of claim 1 of moldable gas-generating compositions which do not include binder components which are suspected of producing harmful combustion products. More particularly, the present invention is directed to the use in the method of claim 1 of moldable gas-generating compositions which avoid the use of polyvinyl chloride (PVC) binders.
Gas-generating compositions containing hydroxyl terminated polybutadiene are known from EP 0194180 for use in gun propellant, from US4184031 for use in vorket propellants and from EP 0685368 (prior art as defined in Ar 54(3) EPC) for use in hydrid air bag inflation systems.
Disclosure of the Invention
It is accordingly an object of the present invention to use gas-generating compositions which can be molded into solid structures.
Another object of the present invention is to use gas-generating compositions which can be injection molded or extruded.
It is another object of the present invention to use moldable gas-generating compositions which do not include binder components which produce harmful combustion products.
A further object of the present invention is to use moldable gas-generating compositions which do not include polyvinyl chloride binder components.
A still further object of the present invention is to use moldable gas-generating compositions which include hydroxyl terminated polybutadiene (HTPB) binder systems.
A still further object of the present invention is to use moldable gas-generating compositions which can be quick cured.
A still further object of the present invention is to use moldable gas-generating compositions which can be cured in approximately 7 minutes or less.
A yet further object of the present invention is to provide a method of molding gas-generating compositions according to claim 1.
A yet further object of the present invention is to provide a method of molding gas-generating compositions which include hydroxyl terminated polybutadiene (HTPB) binder systems which can be quick cured.
According to these and further objects of the present invention which will become apparent as the description thereof proceeds, the present invention provides a molded gas-generating composition according to claim 8 which includes:
  • an oxidizer component;
  • a hydroxyl-terminated polybutadiene binder component;
  • a curing agent for curing the hydroxyl-terminated polybutadiene binder component; and
  • a cure catalyst for accelerating the curing rate of the hydroxyl-terminated polybutadiene component.
    • The present invention further provides a method of forming a molded gas-generating according to claim 1 which comprises:
  • forming a moldable gas-generating composition which includes an oxidizer component, a hydroxyl-terminated polybutadiene binder component, a curing agent for curing the hydroxyl-terminated polybutadiene binder component, and a cure catalyst for accelerating the curing rate of the hydroxyl-terminated polybutadiene component;
  • shaping the moldable gas-generating composition; and
  • curing the shaped gas-generating composition.
    • The present invention further provides an inflator for inflating emergency devices which inflator includes a molded gas-generating composition according to claim 8 that consists essentially of an oxidizer component and a hydroxyl-terminated polybutadiene binder component.
    Best Mode for Carrying out the Invention
    The present invention is directed to the use in the method of claim 1 of gas-generating compositions which, upon ignition, rapidly generate large amounts of gaseous reaction products. The gas-generating compositions used in the present invention are moldable. In this regard, they can be prepared so as to have a suitable viscosity for injection molding, extrusion, or the like. After molding the composition can be cured to form solid structures
    In use, the gas-generating compositions are molded into solid shapes which are incorporated into mechanical inflator devices such as protective passive restraints or "air bags" used in motor vehicles, escape slide chutes, life rafts, or the like. The present gas-generating compositions can be used in conjunction with inflator devices which primarily rely upon stored pressurized gas, and combustible gas-generating compositions to supplement the pressure of the stored gas at the time of use. Alternatively, the present gas-generating compositions can be used as the primary source of gas used to inflate an inflation device.
    When incorporated into mechanical inflator devices, the molded gas-generating compositions of the present invention can be ignited by a conventional initiator or ignitor. For example, when used in conjunction with protective passive restraints or "air bags" used in motor vehicles, electric squibs which are activated upon a sensed impact of the motor vehicle can be used to ignite the gas-generating compositions.
    The gas-generating compositions used in the present invention according to claim 8 include an oxidizer component, a binder component which serves as a fuel, a curing agent for the binder component, and a cure catalyst. For purposes of gas generation, the essential components include the oxidizer component and the binder component. For purposes of molding and curing the gas-generating composition, the curing agent and cure catalyst can be considered essential components. However, it is to be understood that the cure catalyst is only necessary when one desired to quicken the curing rate of the compositions.
    Suitable oxidizers which can be used in the gas-generating compositions include alkali metal chlorates, alkali metal perchlorates, and mixtures thereof. Examples of these oxidizers include sodium chlorate, potassium chlorate, lithium chlorate, sodium perchlorate, potassium perchlorate, and lithium perchlorate. Other oxidizers which can be use include alkaline earth metal perchlorates and ammonium perchlorate.
    One oxidizer which has been found to be particularly useful for purposes of the present invention is potassium perchlorate.
    The binder component used in the gas-generating compositions is a hydroxyl-terminated polybutadiene (HTPB). This binder functions as both a binder and a fuel component in the composition. Hydroxyl-terminated polybutadiene has been found to be a desirable binder component since it does not produce hazardous compounds upon combustion.
    A curing agent for the binder component is included in the gas-generating composition. The curing agent causes the binder component to cure during the molding process.
    Curing agents include isocyanates and diisocyanates, particularly di-polyfuncational diisocyanates. Exemplary curing agents include hexamethylene diisocyanate, poly phenylmethylene isocyanate, isophorone diisocyanate, dimeryl diisocyanate, and the like.
    In addition to the curing agent, a cure catalyst is included in the gas-generating compositions. The cure catalyst accelerates the curing speed of the gas-generating compositions so that they can be quick cured after molding.
    The curing catalysts are selected from the group consisting of triphenylbismuth, dibutyltin dilaurate, and mixtures thereof. The curing catalyst accelerates the curing of the gas-generating compositions so that they can be molded quickly.
    In preferred embodiments the oxidizer component comprises about 83 to 95 weight percent of the gas-generating compositions, the binder component and the curing agent together comprise about 5 to 17 weight percent of the composition, and the cure catalyst comprises about 0.025 to 0.5 weight percent of the composition.
    In more preferred embodiments the oxidizer component comprises about 85 to 90 weight percent of the gas-generating compositions, the binder component and the curing agent together comprise about 10 to 15 weight percent of the composition, and the cure catalyst comprises about 0.025 to 0.5 weight percent of the composition.
    In even more preferred embodiments the oxidizer component comprises about 88 weight percent of the gas-generating compositions, the binder component and the curing agent together comprise about 11.8 to 11.9 weight percent of the composition, and the cure catalyst comprises about 0.1 to 0.2 weight percent of the composition.
    The gas-generating compositions used in the present invention have a cure rate of less than 7 minutes and more typically between about 3 to 5 minutes, over a temperature range of about 93.3 to 190.6°C (200 to 375°F). The curing rate of the gas-generating compositions used in the present invention is dependent upon the curing temperature, as one would expect. The fastest curing times are obtained at higher curing temperatures. The upper limit of the curing temperature is just below the decomposition temperature of the composition. Therefore, for purposes of the present invention, the upper cure temperature should be limited to about 190.6°C (375°F)
    In preferred embodiments, a composition which included about 88 weight percent of the oxidizer component, about 11.8 to 11.9 weight percent of the binder component, and about 0.1 to 0.2 weight percent of the cure catalyst was found to have a curing rate of between about 3 to 5 minutes at 176.7°C (350°F).
    The gas-generating compositions used in the present invention are prepared by mixing the individual components together. In preparing the composition, the binder component and oxidizer component can be premixed together. It is preferred to add the curing agent and cure catalyst to the binder component and oxidizer component just prior to molding or extruding the composition so that the composition does not begin to cure prematurely.
    The components can be mixed together utilizing conventional mixers, blenders, mills, etc. which are known to be useful for mixing pyrotechnic compositions.
    During a typical extrusion process, an extrudable mass of the composition is prepared by mixing the components together. The extrudable mass is then fed into an extruder, extruded and blocked as desired. Next the extrudable mass is extruded, cut free and cured.
    The viscosity of the mixed composition can be adjusted as necessary by incorporating a removable solvent such as ethyl acetate, acetone, ethyl alcohol, or mixtures thereof. The necessary viscosity for extrusion (or injection molding) can easily be determined based upon the specifications of the processing equipment used.
    In addition to the above-discussed components, other components such as conventional stabilizers, colorants, opacifiers, and the like can be included as desired. A preferred stabilizer used in the examples which follow includes Triphenylbismuth, Maleic Anhydride, and Magnesium Oxide used together in substantially equal proportions or about 2:1:1.
    Features and characteristics of the present invention will be further understood from the following non-limiting examples which are included for exemplary purposes. In these examples and throughout the specification, percentages are given as weight percents unless otherwise indicated.
    Example 1
    In this example four gas-generating compositions having the following formulations were prepared:
    Component Parts by Weight
    Hydroxyl-terminated Polybutadiene 15.63 10.85 9.61 2.54
    Isophorone Diisocyanate 1.37 0.95 0.84 0.39
    Potassium Perchlorate 83 88 89.5 94
    Triphenylbismuth Maleic Anhydride Magnesium Oxide 0.2 0.2 0.2 0.2
    The above formulations were mixed, mold cured for 3 minutes at 176.7°C (350°F) and found to have the following properties.
    Performance Properties
    Viscosity (Kp) 2.5 5.5 5.3 5.3
    Burning rates @ 6.9 mPa (1000 psi) 2.54 cm/s (in/sec) 2.0 (0.80) 2.2 (0.87) - 2.3 (0.90) ∼2.4 (∼0.95) 4.4 (1.73)
    Sensitivity - -Impact, friction, ESO and auto ignition Low Low Low Low
    Mechanical Properties
    Stress mPa (psi) 0.81 (118) 1.04 (151) 1.46 (212) 0.26 (38)
    Strain (%) 26 18 8 6.4
    Modulus mPa (psi) 10.7 (1550) 12.4 (1800) 21.6 (4584) 8.6 (1250)
    This data indicates that the formulations meet the requirements for air bag generator (inflator) applications.

    Claims (8)

    1. A method of forming a molded gas-generating composition suitable for inflators which comprises:
      forming a moldable gas-generating composition which includes an oxidizer component selected from the group consisting of alkali metal chlorates, alkali metal perchlorates, alkaline earth metal chlorates, alkaline earth metal perchlorates, ammonium perchlorate, and mixtures thereof, a hydroxyl-terminated polybutadiene binder component, a curing agent selected from the group consisting of isocyanates, diisocynates, and mixtures thereof for curing said hydroxyl-terminated polybutadiene binder component, and a cure catalyst selected from the group consisting of triphenylbismuth, dibutyltin dilaurate, and mixtures thereof for accelerating the curing rate of said hydroxyl-terminated polybutadiene component;
      shaping said moldable gas-generating composition by injection molding or extrusion thereof; and
      curing said shaped gas-generating composition.
    2. A method of forming a molded gas-generating composition according to Claim 1, wherein said gas-generating composition has a cure rate of 5 minutes or less at a temperature of 93.3 to 190.6°C (200 to 375°F)
    3. A method of forming a molded gas-generating composition according to Claim 1, wherein said gas-generating composition further includes a removable solvent.
    4. A method of forming a molded gas-generating composition according to Claim 1, wherein said moldable gas-generating composition comprises about 85 to 95 weight percent of said gas-generating composition, said hydroxyl-terminated polybutadiene binder component and the curing agent together comprise about 5 to 15 weight percent of said gas-generating composition, and said cure catalyst comprises about 0.025 to 0.5 weight percent of said gas-generating composition.
    5. A method of forming a molded gas-generating composition according to Claim 4, wherein said moldable gas-generating composition comprises about 85 to90 weight percent of said gas-generating composition, said hydroxyl-terminated polybutadiene binder component and the curing agent together comprise about 10 to 15 weight percent of said gas-generating composition, and said cure catalyst comprises about 0.025 to 0.5 weight percent of said gas-generating composition.
    6. A method of forming a molded gas-generating composition according to Claim 5, wherein said moldable gas-generating composition comprises about 88 weight percent of said gas-generating composition, said hydroxyl-terminated polybutadiene binder component and the curing agent together comprise about 11.8 to 11.9 weight percent of said gas-generating composition, and said cure catalyst comprises about 0.01 to0.2 weight percent of said gas-generating composition.
    7. A method of forming a molded gas-generating composition according to Claim 6, wherein said gas-generating composition has a cure time of about 3 minutes at a temperature of about 176.7°C (350°F).
    8. A molded gas-generating composition obtainable by the method according to Claim 1.
    EP96929767A 1995-10-03 1996-08-29 Molded gas generating compositions containing a quick cure hydroxyl-terminated binder system and process for producing the same Expired - Lifetime EP0853603B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    US53848795A 1995-10-03 1995-10-03
    US538487 1995-10-03
    PCT/US1996/013827 WO1997012846A1 (en) 1995-10-03 1996-08-29 Quick cure hydroxyl-terminated binder system for gas-generating compositions

    Publications (3)

    Publication Number Publication Date
    EP0853603A1 EP0853603A1 (en) 1998-07-22
    EP0853603A4 EP0853603A4 (en) 2000-11-22
    EP0853603B1 true EP0853603B1 (en) 2003-12-03

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    EP (1) EP0853603B1 (en)
    JP (1) JPH11513354A (en)
    KR (1) KR19990044368A (en)
    AU (1) AU6903996A (en)
    DE (1) DE69630965T2 (en)
    WO (1) WO1997012846A1 (en)

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    JP5666105B2 (en) * 2009-07-15 2015-02-12 株式会社Ｉｈｉエアロスペース Hybrid rocket solid fuel

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    Also Published As

    Publication number Publication date
    AU6903996A (en) 1997-04-28
    JPH11513354A (en) 1999-11-16
    EP0853603A1 (en) 1998-07-22
    KR19990044368A (en) 1999-06-25
    EP0853603A4 (en) 2000-11-22
    DE69630965T2 (en) 2004-10-28
    WO1997012846A1 (en) 1997-04-10
    DE69630965D1 (en) 2004-01-15

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