Abstract: The invention relates to gas generating compositions for use in safety devices for vehicles. In particular, the invention relates to said compositions based on guanidine nitrate used in pedestrian protection devices. The composition substantially comprises 75 to 98% by weight of guanidine nitrate as fuel and 2 to 25% by weight of a burn accelerator selected from the group of the transition metal compounds, the metal nitrates, metal chlorates, metal perchlorates, ammonium perchlorate and mixtures thereof, wherein the transition metal compounds are selected from the compounds of the transition metals Ti, Cr, Mn, Fe, Cu, Zn, Zr and Mo and wherein the gas generating composition exhibits a burn rate of from 3 to 17 mm/s at 20 MPa.

Abstract: The invention relates to gas generating compositions for use in safety devices for vehicles. In particular, the invention relates to said compositions based on guanidine nitrate used in pedestrian protection devices. The composition substantially comprises 75 to 98% by weight of guanidine nitrate as fuel and 2 to 25% by weight of a burn accelerator selected from the group of the transition metal compounds, the metal nitrates, metal chlorates, metal perchlorates, ammonium perchlorate and mixtures thereof, wherein the transition metal compounds are selected from the compounds of the transition metals Ti, Cr, Mn, Fe, Cu, Zn, Zr and Mo and wherein the gas generating composition exhibits a burn rate of from 3 to 17 mm/s at 20 MPa.

Abstract: The invention relates to a propellant pellet for pyrotechnical safety devices in vehicles, such as airbag modules, belt tensioners, micro-inflators and igniters. The propellant pellet according to the invention has a substantially cylindrical shape and can be obtained by dry injection of a powdered propellant composition. The pellets have a maximum diameter of 2 mm and preferably a relative bulk density, defined as ratio of bulk density of the propellant pellets to the maximum theoretical density of the propellant composition, of at least 0.5. A propellant charge, an igniter and an inflator each comprising a plurality of said propellant pellets are provided.

Abstract: The present invention provides a gas generating composition, especially for use in safety devices for vehicles, comprising a) 40 to 60% by weight of a fuel consisting of one or more components selected from the group of guanidine compounds; b) 40 to 60% by weight of basic copper nitrate; c) 0 to 8% by weight of at least one transition metal oxide; d) 1 to 5% by weight of at least one stabilizer component and e) 0 to 5% by weight of further additives, each related to the total weight of the components a) through e); the stabilizer component at room temperature having a solubility in water of not more than 1 g/100 ml and the solubility in water at T=90° C. amounting to at least seven times the solubility at room temperature.

Abstract: The invention relates to gas generating compositions for use in safety devices for vehicles. In particular, the invention relates to said compositions based on guanidine nitrate used in pedestrian protection devices. The composition substantially comprises 75 to 98% by weight of guanidine nitrate as fuel and 2 to 25% by weight of a burn accelerator selected from the group of the transition metal compounds, the metal nitrates, metal chlorates, metal perchlorates, ammonium perchlorate and mixtures thereof, wherein the transition metal compounds are selected from the compounds of the transition metals Ti, Cr, Mn, Fe, Cu, Zn, Zr and Mo and wherein the gas generating composition exhibits a burn rate of from 3 to 17 mm/s at 20 MPa.

Abstract: An azide-free gas-generating composition for use in gas generators for safety arrangements, in particular in gas generators for vehicle occupant restraint systems, includes a fuel and an oxidizer. The fuel is a compound having a melting point of at least 120 degrees C., and is selected from the group of nitrogenous organic compounds and of aliphatic dicarboxylic acids, and mixtures, derivatives and salts thereof. The oxidizer comprises tetrakis(2,2,2-trinitroethyl)orthocarbonate (TNEOC), with the TNEOC being present in a proportion of at least 10% by weight of the composition.

Abstract: An azide-free gas-generating composition for use in gas generators for safety arrangements, in particular in gas generators for vehicle occupant restraint systems, includes a fuel and an oxidizer. The fuel is a compound having a melting point of at least 120 degrees C., and is selected from the group of nitrogenous organic compounds and of aliphatic dicarboxylic acids, and mixtures, derivatives and salts thereof. The oxidizer comprises tetrakis(2,2,2-trinitroethyl)orthocarbonate (TNEOC), with the TNEOC being present in a proportion of at least 10% by weight of the composition.

Abstract: A gas-generating composition is adapted for use in safety devices for vehicles. The composition essentially of 20 to 25% by weight of an organic fuel, 30 to 60% by weight ammonium perchlorate, 5 to 30% by weight of a chloride scavenger and conventional processing aids in a proportion of 0 to 10% by weight. An iron compound is used as said chloride scavenger, which is converted into gaseous iron(III)-chloride upon reaction of the composition.

Abstract: A pyrotechnic composition, in particular for use in safety devices for motor vehicles, has an auto-ignition temperature between 140 and 180 degrees C., and comprises at least 3-nitro-1,2,4-triazol-5-one (NTO) in a proportion of 20 to 60% by weight. The NTO is stabilized by at least one of the following measures: (a) the NTO has an average grain size of 200 to 600 ?m; and (b) the composition comprises an oil in an effective quantity for stabilizing the NTO. The pyrotechnic composition is adapted for use in a safety device, in particular in a safety device in motor vehicles.

Abstract: A pyrotechnic composition, in particular for use in safety arrangements for motor vehicles, has an auto-ignition temperature between 140 and 180 degrees C. and contains hydroxybenzotriazole in an amount of about 25 to 95% by weight of the composition.

Abstract: An explosive composition is adapted for use in a safety arrangement for vehicles, and comprises a fuel of a micro-structured or nano-structured porous solid material and an oxidizing agent which is solid or liquid at ambient temperature. The oxidizing agent is selected from the group consisting of sulphur, selenium, tellurium, bromine, iodine, phosphorus and arsenic as well as mixtures and oxygen-free compounds thereof. In a method for the production of the explosive composition, the oxidizing agent is dissolved in a solvent and introduced into the pores of the fuel.

Abstract: A method for inflating a gas bag of a safety arrangement in vehicles provides a gas generator which contains a pyrotechnic propellant comprising an organic fuel and ammonium perchlorate as an oxidizing agent. The pyrotechnic propellant, after its activation, releases a gas which has an amount of hydrochloric acid. A coating is arranged on the inner surface of the gas bag, on which the hydrochloric acid is neutralized or absorbed.

Abstract: The present invention relates to an azide-free gas-generating composition, in particular for use in safety devices for motor vehicles, comprising a fuel in a proportion of 20 to 60% by weight and consisting of one or more components, and an oxidizer mixture in a proportion of 40 to 80% by weight and consisting of at least three components, each in relation to the total composition.

Abstract: A nitrocellulose-free, gas-generating composition for use in vehicle occupant restraint systems, in particular in a belt tensioner gas generator, substantially consists of at least one nitrogen-containing organic fuel in a proportion of 55 to 70% by weight, an inorganic oxidator in a proportion of 30 to 45% by weight, at least one combustion moderator in a proportion of up to 10% by weight and up to 5% by weight conventional adjuvants and additives, each in relation to the overall weight of the composition. The composition has a pressure exponent of less than 0.35 and a combustion rate at 200 bar of at least 40 mm/s.

Abstract: The invention relates to a gas generator for generating gases, comprising a housing which has an interior space and at least one combustion chamber filled with a predetermined quantity of solid propellant. The propellant consists of a plurality of solid propellant parts arranged in the combustion chamber in an irregular manner. The compressed gas is stored in a predetermined quantity in the combustion chamber and the combustion chamber constructed as a pressure chamber sealed hermetically toward outside in a non-activated state of the gas generator.

Abstract: A nitrocellulose-free, gas-generating composition for use in vehicle occupant restraint systems, in particular in a belt tensioner gas generator, substantially consists of at least one nitrogen-containing organic fuel in a proportion of 55 to 70% by weight, an inorganic oxidator in a proportion of 30 to 45% by weight, at least one combustion moderator in a proportion of up to 10% by weight and up to 5% by weight conventional adjuvants and additives, each in relation to the overall weight of the composition. The composition has a pressure exponent of less than 0.35 and a combustion rate at 200 bar of at least 40 mm/s.

Abstract: The invention relates to an igniter composition for use in a gas generator for a safety means in vehicles. The igniter composition consists of a gas-generating composition in an amount of 15 to 70 wt-% and of a thermite composition in an amount of 30 to 85 wt-%. The gas-generating composition consists essentially of a guanidine compound as fuel and an inorganic oxidizer. The thermite composition consisting essentially of a metal and a metal oxide. The igniter composition or the gas-generating composition and the thermite composition, each for itself, have an oxygen balance of between 0 and −20%.

Abstract: The invention relates to a method for producing propellant compacts for use in gas generators for safety devices in motor vehicles by extrusion, comprising the following steps: mixing the constituents of the propellant and stirring the mixture into a paste with a solvent so as to form a plasticizable mass, extruding the plasticizable mass in order to form propellant compacts, and drying the propellant compacts in order to remove the solvent, a thickening agent which increases the viscosity being added to the solvent prior to pasting in a proportion of from 0.1 to 10% by weight, relative to the solvent, and the dried propellant compacts having a density of at least 70% of the theoretical density. The invention further relates to propellant compacts obtainable in accordance with this method.

Abstract: An apparatus (10) for helping to protect a vehicle occupant includes an inflatable vehicle occupant protection device (16) and a inflator (12) for providing inflation fluid to inflate the vehicle occupant protection device (16). A non-azide gas generating material is in the inflator (12). The non-azide gas generating material when combusted produces inflation fluid, which comprises carbon monoxide (CO) and nitrogen oxides (NOx). A catalyst system, which contacts the inflation fluid, is also in the inflator. The catalyst system is reactive with the carbon monoxide (CO) and nitrogen oxides (NOx) in the inflation fluid. The catalyst system comprises a zeolite and a catalytic material. The catalytic material is supported by the zeolite.

Abstract: The invention relates to an igniter composition for use in a gas generator for a safety means in vehicles. The igniter composition consists of a gas-generating composition in an amount of 15 to 70 wt-% and of a thermite composition in an amount of 30 to 85 wt-%. The gas-generating composition consists essentially of a guanidine compound as fuel and an inorganic oxidizer. The thermite composition consisting essentially of a metal and a metal oxide. The igniter composition or the gas-generating composition and the thermite composition, each for itself, have an oxygen balance of between 0 and −20%.