Gas Generator Composition Using Triazine Fuel and Zeolite Absorbent
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Solution Overview
Problem
Gas generators for airbag apparatuses face challenges in maintaining high ignition ability over long periods, especially under severe temperature conditions, due to moisture-induced deterioration of gas generating agents with low combustion temperatures.
Innovation Solution
A gas generating composition comprising a fuel selected from triazine and guanidine compounds, an oxidizing agent combination of basic metal nitrates and carbonates, and an absorbent, such as synthetic zeolite, is used to maintain ignition ability and reduce combustion temperature, with the absorbent capturing moisture to prevent deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a gas generating agent with low combustion temperature is used, then the size and weight of the gas generator can be reduced, but the ignition ability deteriorates under severe temperature conditions
Solution Approach 1:
The patent uses a composite gas generating agent comprising melamine cyanurate (triazine compound) and nitroguanidine (guanidine compound) as fuels, combined with basic metal nitrate and basic metal carbonate as oxidizing agents. This composite formulation achieves low combustion temperature while maintaining reliable ignition ability under severe temperature conditions from -45°C to +85°C.
2Adaptability or versatility
If the gas generator operates under severe temperature conditions, then adaptability to environmental changes is improved, but the ignition ability deteriorates over time
Solution Approach 1:
The patent optimizes the compositional parameters of the gas generating agent, specifically the ratio of melamine cyanurate to nitroguanidine and the combination of basic metal nitrate with basic metal carbonate. These parameter changes enable the agent to maintain consistent ignition ability across a wide temperature range from -45°C to +85°C over extended operational periods.
3Temperature
If basic metal nitrate is used as oxidizing agent, then combustion temperature is reduced, but moisture-induced deterioration increases
Solution Approach 1:
The patent combines basic metal nitrate with basic metal carbonate in a specific formulation. This composite oxidizing agent system reduces combustion temperature while the basic metal carbonate component provides protection against moisture-induced deterioration, maintaining agent stability in humid environments.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition ensures high ignition ability even after long-term exposure to severe conditions, reducing the size and weight of the gas generator while preventing moisture-induced degradation.
Implementation Method 1
an absorbent... capturing moisture to prevent deterioration
Implementation Method 2
the gas generating agent thermally decomposes when it is exposed to high temperature under the presence of moisture
Implementation Method 3
a gas generating agent including (a) fuel... (b) an oxidizing agent... low combustion temperature
Data Source
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AI summary
Provided is a gas generating composition that maintains stable ignition performance for a long period. A gas generating composition includes: a gas generating agent including (a) fuel selected from a triazine compound and a guanidine compound, (b) an oxidizing agent including a combination of (b-1) basic metal nitrate and (b-2) basic metal carbonate, and (c) a binder; and (d) an absorbent. The gas generating agent and the absorbent may not be integrally molded or may be integrally molded.