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

Info

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
Authority
EP
European Patent Office
Prior art keywords
gas
generating composition
weight percent
hydroxyl
molded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96929767A
Other languages
German (de)
French (fr)
Other versions
EP0853603A1 (en
EP0853603A4 (en
Inventor
Robert S. Scheffee
Merlin W. Larimer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlantic Research Corp
Original Assignee
Atlantic Research Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Atlantic Research Corp filed Critical Atlantic Research Corp
Publication of EP0853603A1 publication Critical patent/EP0853603A1/en
Publication of EP0853603A4 publication Critical patent/EP0853603A4/en
Application granted granted Critical
Publication of EP0853603B1 publication Critical patent/EP0853603B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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.

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

    Family

    ID=24147121

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96929767A Expired - Lifetime EP0853603B1 (en) 1995-10-03 1996-08-29 Molded gas generating compositions containing a quick cure hydroxyl-terminated binder system and process for producing the same

    Country Status (6)

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

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2818636B1 (en) 2000-12-22 2003-02-28 Poudres & Explosifs Ste Nale HYDROCARBON BINDER GAS GENERATING PYROTECHNIC COMPOSITIONS AND CONTINUOUS MANUFACTURING METHOD
    JP5666105B2 (en) * 2009-07-15 2015-02-12 株式会社Ｉｈｉエアロスペース Hybrid rocket solid fuel

    Family Cites Families (13)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3692495A (en) * 1970-06-19 1972-09-19 Thiokol Chemical Corp Gas generator
    US4184031A (en) * 1976-11-11 1980-01-15 Thiokol Corporation Control of cure rate of polyurethane resins
    US4944815A (en) * 1980-07-24 1990-07-31 The United States Of America As Represented By The Secretary Of The Navy Bonding agent for composite propellants
    US4670068A (en) * 1981-02-19 1987-06-02 Hercules Incorporated Polyfunctional isocyanate crosslinking agents for propellant binders
    NO831850L (en) * 1982-05-28 1997-02-26 Royal Ordnance Plc Process for producing a shaped rubbery propellant charge for rockets and the like
    US4803019A (en) * 1984-02-10 1989-02-07 Morton Thiokol, Inc. Process for forming a liner and cast propellant charge in a rocket motor casing
    FR2577919B1 (en) * 1985-02-27 1987-02-20 Poudres & Explosifs Ste Nale PROCESS FOR THE MANUFACTURE WITHOUT SOLVENT OF COMPOSITE PYROTECHNIC PRODUCTS WITH THERMOSETTING BINDER AND PRODUCTS THUS OBTAINED, IN PARTICULAR COMPOSITE PROPULSIVE POWDERS
    US4597811A (en) * 1985-07-03 1986-07-01 The United States Of America As Represented By The Secretary Of The Army Prevention of unwanted cure catalysis in isocyanate cured binders
    US4925909A (en) * 1988-10-26 1990-05-15 Japan As Represented By Director General, Technical Research And Development Institute, Japan Defense Agency Gas-generating agent for use in ducted rocket engine
    USH934H (en) * 1990-07-09 1991-07-02 The United States Of America As Represented By The Secretary Of The Army Maleic anhydride adjunct to triphenylbismuthine to improve mechanical properties of hydroxy terminated binders
    US5472532A (en) * 1993-06-14 1995-12-05 Thiokol Corporation Ambient temperature mix, cast, and cure composite propellant formulations
    US5474625A (en) * 1993-12-16 1995-12-12 The United States Of America As Represented By The Secretary Of The Navy Desensitized solid rocket propellant formulation
    US5486248A (en) * 1994-05-31 1996-01-23 Morton International, Inc. Extrudable gas generant for hybrid air bag inflation system

    Also Published As

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

    Similar Documents

    Publication Publication Date Title
    US5507891A (en) Propellant composition for automotive safety applications
    US5486248A (en) Extrudable gas generant for hybrid air bag inflation system
    US5641938A (en) Thermally stable gas generating composition
    US5866842A (en) Low temperature autoigniting propellant composition
    JP3762439B2 (en) Two-part igniter, air pump and igniter manufacturing method
    US6824626B2 (en) Gas-generating pyrotechnic compositions with a binder and continuous manufacturing process
    AU749890B2 (en) Foamed energetic igniters and air bag assemblies containing the same
    JP2793514B2 (en) Pyrotechnic composition containing thermoplastic elastomer binder
    JPH0692770A (en) Composition for generating non-toxin hot gas and use thereof for protecting pas- senger of automobile
    US20030037850A1 (en) Extruded hydroxy terminated polybutadiene gas generating material
    EP0853603B1 (en) Molded gas generating compositions containing a quick cure hydroxyl-terminated binder system and process for producing the same
    US5734123A (en) Extrudable gas-generating compositions
    JP2002511829A (en) Ammonium nitrate propellant containing molecular sieve
    US6080248A (en) Non-detonatable pyrotechnic materials for microsystems
    EP1606229B1 (en) Binder matrix for gas generants and related compositions and methods
    US6802533B1 (en) Gas generating material for vehicle occupant protection device
    JP2001500835A (en) Use of gas mixtures in hybrid air bag inflation devices
    MXPA01003695A (en) Foamed energetic igniters and air bag assemblies containing the same

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    17P Request for examination filed

    Effective date: 19980429

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): DE FR GB IT SE

    RIN1 Information on inventor provided before grant (corrected)

    Inventor name: LARIMER, MERLIN, W.

    Inventor name: SCHEFFEE, ROBERT, S.

    A4 Supplementary search report drawn up and despatched

    Effective date: 20001011

    AK Designated contracting states

    Kind code of ref document: A4

    Designated state(s): DE FR GB IT SE

    17Q First examination report despatched

    Effective date: 20020902

    GRAH Despatch of communication of intention to grant a patent

    Free format text: ORIGINAL CODE: EPIDOS IGRA

    RTI1 Title (correction)

    Free format text: MOLDED GAS GENERATING COMPOSITIONS CONTAINING A QUICK CURE HYDROXYL-TERMINATED BINDER SYSTEM AND PROCESS FOR PRODUCING TH

    GRAS Grant fee paid

    Free format text: ORIGINAL CODE: EPIDOSNIGR3

    GRAA (expected) grant

    Free format text: ORIGINAL CODE: 0009210

    AK Designated contracting states

    Kind code of ref document: B1

    Designated state(s): DE FR GB IT SE

    REG Reference to a national code

    Ref country code: GB

    Ref legal event code: FG4D

    REF Corresponds to:

    Ref document number: 69630965

    Country of ref document: DE

    Date of ref document: 20040115

    Kind code of ref document: P

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: SE

    Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

    Effective date: 20040303

    ET Fr: translation filed
    PLBE No opposition filed within time limit

    Free format text: ORIGINAL CODE: 0009261

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

    26N No opposition filed

    Effective date: 20040906

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: FR

    Payment date: 20060802

    Year of fee payment: 11

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: GB

    Payment date: 20060808

    Year of fee payment: 11

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: DE

    Payment date: 20060828

    Year of fee payment: 11

    PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

    Ref country code: IT

    Payment date: 20070719

    Year of fee payment: 12

    GBPC Gb: european patent ceased through non-payment of renewal fee

    Effective date: 20070829

    REG Reference to a national code

    Ref country code: FR

    Ref legal event code: ST

    Effective date: 20080430

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: DE

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080301

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: FR

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20070831

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: GB

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20070829

    PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

    Ref country code: IT

    Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

    Effective date: 20080829