Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
대리인 / 주소
Novak Druce Connolly Bove + Quigg LLP
인용정보
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5
초록▼
The invention is directed to a solid, porous material, suitable for generating nitrogen gas, said material having a porosity of 20 to 75 vol. %, and a composition comprising, based on the weight of the material of 60 to 90 wt. % of sodium azide, 0.1 to 20 wt. % of an inert chemical coolant based on
The invention is directed to a solid, porous material, suitable for generating nitrogen gas, said material having a porosity of 20 to 75 vol. %, and a composition comprising, based on the weight of the material of 60 to 90 wt. % of sodium azide, 0.1 to 20 wt. % of an inert chemical coolant based on at least one inorganic salt having a heat capacity of at least 1400 J/K/kg, 0.1 to 20 wt. % of modifying agent selected from metal oxides and metal carbonates, and a binder, selected from the group consisting of at least one alkali metal silicate, preferably waterglass, or a poly-tetrazole, in an amount of between 3 and 15 wt. %.
대표청구항▼
1. A solid, porous nitrogen gas generating material having a porosity of 20 to 75 vol. %, and comprising, based on the total weight of the material: 60 to 90 wt. % of sodium azide,0.1 to 20 wt. % of an inert chemical coolant based on at least one inorganic salt having a heat capacity of at least 140
1. A solid, porous nitrogen gas generating material having a porosity of 20 to 75 vol. %, and comprising, based on the total weight of the material: 60 to 90 wt. % of sodium azide,0.1 to 20 wt. % of an inert chemical coolant based on at least one inorganic salt having a heat capacity of at least 1400 J/K/kg,0.1 to 20 wt. % of modifying agent selected from metal oxides and metal carbonates, and3 and 15 wt. % of a binder, selected from at least one alkali metal silicate or a poly-tetrazole. 2. Material according to claim 1, wherein the coolant is selected from LiF, Li2O, Li2C2, Li3N3, LiCl, NaCl, CaF2, Li2SO4, Li2B2O4, Li2B4O7 and Li2SiO3. 3. Material according to claim 1, wherein the modifying agent is selected from iron oxide (Fe2O3) or sodium carbonate (Na2CO3). 4. Material according to claim 1, wherein said poly-tetrazole is selected from a tetrazole salt of an alkali metal. 5. Material according to claim 1, wherein said alkali metal silicate is a mixture of sodium and potassium silicate. 6. Material according to claim 1, wherein said coolant is an inorganic salt having a heat capacity of at least 1900 J/K/kg. 7. Gas generator, for generating nitrogen gas, comprising: a nitrogen gas generating material;a housing for the nitrogen gas generating material and;an igniter,wherein the nitrogen gas generating material is a solid, porous material having a porosity of 20 to 75 vol. %, and comprises, based on the total weight of the material: 60 to 90 wt. % of sodium azide,0.1 to 20 wt. % of an inert chemical coolant based on at least one inorganic salt having a heat capacity of at least 1400 J/K/kg,0.1 to 20 wt. % of modifying agent selected from metal oxides and metal carbonates, and3 and 15 wt. % of a binder, selected from at least one alkali metal silicate or a poly-tetrazole. 8. Gas generator according to claim 7, further comprising a filter present downstream of the gas generating material. 9. Gas generator according to claim 7, wherein the nitrogen gas generating material is mounted into the housing in such a way that 90% or more of the decomposition gases pass through the mounted gas generating material. 10. Process for generating nitrogen gas, which process comprises: providing a gas generator comprising a nitrogen gas generating material, a housing for the nitrogen gas generating material, and an igniter, wherein the nitrogen gas generating material is a solid, porous material having a porosity of 20 to 75 vol. %, and comprises, based on the total weight of the material: 60 to 90 wt. % of sodium azide,0.1 to 20 wt. % of an inert chemical coolant based on at least one inorganic salt having a heat capacity of at least 1400 J/K/kg,0.1 to 20 wt. % of modifying agent selected from metal oxides and metal carbonates, and3 and 15 wt. % of a binder, selected from at least one alkali metal silicate or a poly-tetrazole,igniting the gas generating material in the gas generator to cause decomposition of the nitrogen gas generating material, andgenerating nitrogen from the decomposition. 11. Material according to claim 1, wherein the at least one alkali metal silicate comprises waterglass. 12. Material according to claim 2, wherein the coolant compound is selected from LiF. 13. Material according to claim 4, wherein the tetrazole salt of an alkali metal is selected from sodium poly-5-vinyltetrazole, potassium poly-5-vinyltetrazole, and ammonium poly-5-vinyltetrazole.
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이 특허에 인용된 특허 (5)
Verneker V. R. Pai (Baltimore MD), Air bag inflator gas compositions and inflator containing the same.
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