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Basic metal nitrate, process for producing the same and gas generating agent composition

a technology of base metal nitrate and gas generating agent, which is applied in the direction of weapons, chemistry apparatus and processes, explosives, etc., can solve the problems of toxicity to human bodies or hazards in handling sodium azide, and the above non-azide based gas generating composition is problematic, so as to reduce the interaction, increase the interaction, and reduce the decomposition temperature

Inactive Publication Date: 2007-05-31
ZHOU XINGXI +5
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a method for producing a gas generator composition containing BCN. By increasing the number of bonds within the material, it becomes easier to break down into smaller pieces. However, if this happens, the gas generators lose their effectiveness due to reduced reaction temperatures caused by the presence of excessive amounts of BCN. To solve this problem, certain technical means are needed.

Problems solved by technology

The technical problem addressed in this patent text is the development of a safe non-azide based gas generating composition that overcomes the issues of toxicity, hazards, and high cost associated with current gas generating agents. Additionally, the gas generating agent should have a high storage stability with less decomposition of the fuel and should not be degraded during a long term.

Method used

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  • Basic metal nitrate, process for producing the same and gas generating agent composition
  • Basic metal nitrate, process for producing the same and gas generating agent composition
  • Basic metal nitrate, process for producing the same and gas generating agent composition

Examples

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example 1

[0207] 36.3 g of copper nitrate 3-hydrate was charged in a beaker fitted with a stirrer, and then dissolved in 100 ml of distilled water which was poured therein, while being stirred. The resulting solution was heated at 60° C. A solution of 18.9 g of sodium bicarbonate in 240 ml of water was added over 1 hour. After the addition was completed, the mixture was aged while being stirred at 60° C. for 60 minutes. The resulting gel-like precipitate was filtered at room temperature, and washed with distilled water. A pale blue solid matter having quite a good filterability was obtained. When a part of the washed product was dried in air at 110° C., the product maintained the pale blue color, and the thermal stability was quite good. The remaining washed product was dried at 110° C. under reduced pressure of 1,333.22 Pa to obtain a basic copper nitrate in an amount of 17.4 g (yield 96.5%). The results of measurements are shown in Table 1.

example 2

[0208] 36.3 g of copper nitrate 3-hydrate was charged in a beaker fitted with a stirrer, and then dissolved in 100 ml of distilled water which was poured therein, while being stirred. The resulting solution was heated at 80° C. A solution of 18.9 g of sodium bicarbonate in 240 ml of water was added over 1 hour. Immediately after the addition was completed, a precipitate was filtered, and washed with distilled water to obtain a pale blue solid matter having quite a good filterability. When a part of the washed product was dried in air at 110° C., the product maintained the pale blue color, and the thermal stability was good. The remaining washed product was dried at 110° C. under reduced pressure of 1,333.22 Pa to obtain a basic copper nitrate. The results of measurements are shown in Table 1.

example 3

[0209] 214.6 g (1.00 mol) of copper nitrate 3-hydrate was charged in a beaker fitted with a stirrer, and then dissolved in 500 ml of distilled water which was poured therein, while being stirred. The resulting solution was heated at 40° C. A solution of 126 g (1.50 mols) of sodium bicarbonate in 1,000 ml of distilled water was added over 1 hour. After the addition of sodium bicarbonate was completed, the mixture was heated to 80° C., and aged for 30 minutes while being stirred. A precipitate was filtered, washed, and dried to obtain a pale blue basic copper carbonate. The results of measurements are shown in Table 1.

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Abstract

A basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 μm; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Also, a gas generating composition which has a low toxicity, a high burning rate, and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate, and (c) a binder and/or a slag-forming agent.

Description

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Claims

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Application Information

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Owner ZHOU XINGXI
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