Gas Generating Composition for Airbag Inflators
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Solution Overview
Problem
Conventional gas generating compositions for airbag inflators face challenges in reducing CO generation without increasing NOx production and compromising ignition ability, as existing methods either increase NOx or decrease ignition when attempting to minimize CO.
Innovation Solution
A gas generating composition incorporating a fuel, oxidizing agent, binder, and complex basic carbonates represented by specific formulas, which do not require interlayer water, thereby maintaining ignition ability while reducing CO generation without increasing hazardous gases like NOx.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If metal hydroxide such as aluminum hydroxide is introduced to decrease CO concentration, then CO generation reduces, but ignition ability decreases
Solution Approach 1:
The invention optimizes the basicity parameter of the complex basic carbonate to a specific range (20-30%) and controls the metal cation ratio (Al3+:divalent metal cation = 1:(1-2)), which balances the CO reduction effect while preserving sufficient ignition ability through controlled chemical reactivity
Solution Approach 2:
The invention replaces single-metal hydroxides with composite complex basic carbonates containing multiple metal cations in specific proportions, where the synergistic interaction between different metal cations maintains ignition promotion while reducing CO generation
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 effectively reduces CO generation without increasing NOx and maintains ignition ability, offering a safer gas mixture for airbag inflators.
Implementation Method 1
Gas generating agents for airbag inflators generally include a fuel, an oxidizing agent, a binder, and various additives
Implementation Method 2
a method of introducing a metal hydroxide such as aluminum hydroxide as an additive are known as conventional methods for decreasing CO concentration in the gas
Data Source
AI summary
The present invention relates to a gas generating composition including a fuel, an oxidizing agent, a binder and an additive, the additive being one or two or more selected from complex basic carbonates represented by Formula (I) or (II) below;M1+M23+CO3(OH)2 (I)M32+M42+CO3(OH)2 (II)(In Formula (I), M1+ stands for H+, Li+, Na+, K+, or NH4+; M23+ stands for Al3+, Fe3+, Cr3+, Co3+, In3+, Bi3+, Sb3+, B3+, Sc3+, or Ga3+;in Formula (II), M32+ and M42+ are mutually different, each standing for Cu2+, Zn2+, Co2+, Ni2+, Mg2+, Mn2+, Fe2+, or Be2+).