CN1044107C - 汽车安全气囊用氮气发生剂 - Google Patents

汽车安全气囊用氮气发生剂 Download PDF

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CN1044107C
CN1044107C CN95115500A CN95115500A CN1044107C CN 1044107 C CN1044107 C CN 1044107C CN 95115500 A CN95115500 A CN 95115500A CN 95115500 A CN95115500 A CN 95115500A CN 1044107 C CN1044107 C CN 1044107C
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generating agent
nitrogen generating
nitrogen
air bag
safety air
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CN1145329A (zh
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何顺录
赵才
李成云
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Beijing Heda Automobile Safety Tech Co
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Beijing Heda Automobile Safety Tech Co
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    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

一种汽车安全气囊用的氮气发生剂，该氮气发生剂主要成分是碱金属或碱土金属的叠氮化物。它是氮气的主要来源，和它相配用的物质是金属氧化物及和它配用附加物是残渣增强剂、冷却剂和粘合剂。本发明提供了高的容积效率，良好的储存性能，能反应出大量无毒氮气，药剂反应速度可调，使用安全可靠的氮气发生剂。

Description

汽车安全气囊用氮气发生剂
本发明涉及一种汽车安全气囊用的氮气发生剂。
当前，机动车辆碰撞事故时时不断发生，虽有各种防撞保险装置，如在车辆前端装有挡板式、杠杆式装置，但免不了发生碰撞时仍有人员伤亡的事件，故目前已有采用气囊式安全保护装置。
本发明的目的是要提供一种汽车安全气囊用的氮气发生剂。当汽车发生碰撞事故时，碰撞深测点火控制装置，大约在20ms内，输出一个点火信号，一般情况下，这个点火信号为2A的电流。该点火电流迅速点燃电点火管，随即引燃氮气发生器中的氮气发生剂。它所生成的气体使气袋膨胀，在乘员前方形成一个柔性的缓冲气垫，从而保护汽车驾驶员的安全。
本发明的目的是通过下述方案实现的：一种氮气发生剂以叠氮化钠(NaN3)作为还原剂，以三氧化二铁(Fe2O3)、二氧化锰(MnO2)作为氧化剂，以二氧化硅(SiO2)作残渣增强剂，碳酸氢钠(NaHCO3)作为冷却剂，聚四氟乙烯作为粘合剂。其配方如下：叠氮化钠为50-75％，三氧化二铁为27-14％，二氧化锰为12-16％，高氯酸钾为6-3％，二氧化硅为5-2％，碳酸氢钠外加12-7％，聚四氟乙烯外加6-12％。
本发明所述的叠氮化钠(NaN3)质量标准：叠氮化钠化学纯含量≥99％，杂质最高含量：游离碱2％，重金属0.002％，干燥失重0.2％，水不溶物0.02％。
本发明所使用的三氧化二铁(以Fe计)不少于68.9-70.1％，杂质最高含量：水溶解物0.2％，盐酸不溶物0.1％，干燥失重0.4％，硫酸盐(SO4)0.16％，N化合物(以N计)0.05％，重金属(以Cu计)0.05％，碱金属及碱土金属(以硫酸盐计)0.05％，有机杂质0.01％。
本发明所使用的二氧化锰(MnO2)含量不少于72％，不纯物最高含量：盐酸不溶物0.2％，氯化物(Cl)0.01％，硫酸盐(SO4)0.1％，铁(Fe)0.01％，重金属(以Cu计)0.01％，碱金属及碱土金属(以硫酸盐计)0.05，有机杂质(C)0.01％。
本发明所使用的二氧化硅(SiO2)粒度100目，含量99.99％。
本发明所使用的碳酸氢钠(NaHCO3)含量不少于99.8％，杂质含量：水不溶物0.02％，氯化物及氯酸盐(以Cu计)0.005％，氮化合物(以N计)0.002％，硫化合物(以SO4计)0.01％，磷酸盐(PO4)0.005％，硅酸盐(SiO3)0.01％，钾(K)0.02％，铁(Fe)0.002％，镁(Mg)0.005％，钙(Ca)0.01％，铝(Al)0.02％，重金属(以Pb计)0.002％。
本发明药剂的生产工艺采用机械湿混工艺或共沉淀工艺均可。所得到的混合物用压片机压制所要求的药片。
下面结合附图和实施例对本发明作进一步详细说明：
实施例1：
成份               配比(％)
叠氮化钠(NaN3)    66.8％
三氧化二铁(Fe2O3) 19.2％
二氧化锰(MnO2)    7.0％
高氯酸钾(KClO4)   4.0％
二氧化硅(SiO2)    3.0％
碳酸氢钠(NaHCO3)  10％(外加)
聚四氟乙烯    6-12％(外加)
把上述本发明药剂的组合物用共沉淀法工艺制作，压成Ф6×3的药片。
实测：
密度：        1.7-1.85g/cm3
抗压强度：    ＞120kg/cm2
冲击感度：    0％
摩擦感度：    0％
热感度：      ＞500℃
静电火花感度：≥30KV
有毒气体含量：CO＜500PPM,NO＜25PPM
将上述发生剂取药量为75-85g，放在氮气发生器中，试验得到自点火至排气孔处出气时间为7-10ms之间，排气孔附近的温度为170-200℃，得到图1所示的压力-时间曲线A。
实施例2．
为增强实施例1中氮气发生剂的防潮和增热效果，在实施例1药剂成份和配比的基础上采用表面包覆技术。这种技术的包覆液成份为：叠氮化钠(NaN3)20-50％，高氯酸钾(KClO4)25-35％，氟橡胶10-15％，铝粉15-25％，烘制二氧化硅(SiO2)1-3％。
在制作时，将上述药剂成份与丙酮、甲醇等溶剂混合在一起，把药片浸入包覆液中浸没后取出干燥待用。
将上述75-85g药剂放在发生器中进行试验，实测从点火到排气孔出气时间为6ms，排气孔温度＜220℃，所得曲线如图1所示压力一时间曲线B。
氮气发生剂作为汽车安全囊用的产气药剂，具有很高的氮气。药剂反应速度可调，冲击感度和摩擦感度很低，使用安全可靠，因而得到了广泛的使用。

Claims (1)

1．一种汽车安全气囊用的氮气发生剂，其特征在于它含有如下组分(以重量计)：叠氮化钠50-75％，三氧化二铁27-14％，二氧化锰12-16％，高氯酸钾6-3％，二氧化硅5-2％，碳酸氢钠外加12-7％，聚四氟乙烯外加6-12％。
CN95115500A 1995-09-15 1995-09-15 汽车安全气囊用氮气发生剂 Expired - Fee Related CN1044107C (zh)

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CN95115500A CN1044107C (zh) 1995-09-15 1995-09-15 汽车安全气囊用氮气发生剂

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CN1044107C true CN1044107C (zh) 1999-07-14

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102010277B (zh) * 2010-09-15 2012-07-11 中北大学 一种基于anpzo的安全气囊气体发生剂

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012628A1 (en) * 1978-12-18 1980-06-25 Thiokol Corporation Pelletizable, rapid and cool burning solid nitrogen gas generant suitable for automotive crash bag inflators and method for generation of nitrogen gas
US4296084A (en) * 1979-10-29 1981-10-20 Thiokol Corporation Method of and apparatus for gas generation
EP0063641A1 (en) * 1981-03-16 1982-11-03 Rockwell International Corporation High yield nitrogen gas generators

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012628A1 (en) * 1978-12-18 1980-06-25 Thiokol Corporation Pelletizable, rapid and cool burning solid nitrogen gas generant suitable for automotive crash bag inflators and method for generation of nitrogen gas
US4296084A (en) * 1979-10-29 1981-10-20 Thiokol Corporation Method of and apparatus for gas generation
EP0063641A1 (en) * 1981-03-16 1982-11-03 Rockwell International Corporation High yield nitrogen gas generators

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